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Home My WebLink AboutEnergy Audit Tanalian School 2012Porte Blower -Scher auckt Karl Reiche 1:Laura Hylton <lhylton@lpsd.com> Sent:Monday,September 30,2013 2:55 PM To:Karl Reiche Ce:Tim McDermott;David Lockard Subject:Port Alsworth Attachments:BBNC-ILI-CAEC-02 LPSD Tanalian School IGA Report IFC.pdf Hi Karl, Per my discussion with David Lockard this morning |am forwarding you an energy audit of the existing Port Alsworth- school building., We will be adding to the school and renovating the existing building if all goes well we will bid the project in January and hope to start construction spring 2014." |have spoken with Steve Stassel regarding the power house work already. LPSD has committed to contribute $100,000 up front to assist with construction of a new power house building in exchange for all the tank farm and power house being located on PAIC land and a 25 year recovery heat agreement. |look forward to working with you on this project and if there is additional information |can provide or ways |can assist se let me know. Laura Hylton Lake and Peninsula School District P O Box 498 King Salmon,AK 99613 (907)246-4280 dial 4 and x310 fax (907)246-4473 ENERGY AUD IT REPORT Tanalian School 100 School Road Port Alsworth,Alaska 99653 AkWarm ID No.BBNC-ILI-CAEC-02 Submitted by: Central Alaska Engineering Company Contact:Jerry P.Herring,P.E.,C.E.A. 32215 Lakefront Drive Soldotna,Alaska 99669 Phone (907)260-5311 akengineer@starband.net June 30,2012 Central Alaska - ENGINEERING COMPANY CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 APPENDIX A --ENERGY BENCHMARK DATA REPORT APPENDIX B --AKWARM-C BUILDING SIMULATION SHORT REPORT TABLE OF CONTENTS EXECUTIVE SUMMARY INTRODUCTION METHOD OF ANALYSIS LIMITATIONS OF STUDY BUILDING DESCRIPTION ENERGY CONSUMPTION AND COST ENERGY EFFICIENCY MEASURES CONCLUSION APPENDICES APPENDIX C --MAJOR EQUIPMENT LIST APPENDIX D -SITE VISIT PHOTOS APPENDIX E -THERMAL SITE VISIT PHOTOS APPENDIX F -WASTE HEAT METER INFORMATION AkWarm ID No.BBNC-ILI-CAEC-02 PAGEi OF iv CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT LIST OF TABLES Table 1.1:Priority List -Emergy Efficiency Measures 2 Table 1.2:Annual Energy Cost Estimations 3 Table 6.1:Emergy Costs and Consumption Data for 2008-2009 and 2009-2010.......43 Table 6.2:AkWarm-C Estimated Monthly Electrical Consumption 15 Table 6.3:AkWarm-C Estimated Monthly Fuel Oil Consumption 15 Table 6.4:AkWarm-C Estimated Monthly Waste Heat Consumption 15 Table 6.5:Tanalian School EUI Calculations 16 LIST OF FIGURES Figure 2.1:Tanalian School -Floor Plan View 5 Figure 6.1:Annual Energy Costs by End Use 14 Figure 6.2:Annual Energy Cests by Fuel Type 14 Figure 6.3:Annual Space Heating Cost by Component 15 AkWarm ID No.BBNC-ILI-CAEC-02 PAGE ii OF iv CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT ABBREVIATIONS AEE..sesscceecsencecceseonsoeces Association of Energy Engineers AHFC Alaska Housing Finance Corporation AHU Air Handling Unit ARIS Alaska Retrofit Information System ARRA....cc ececeesseee American Recovery and Reinvestment Act ASHRAE American Society of Heating,Refrigeration,and Air-Conditioning Engineers BPO Building Plant Operator BTU ....cccsrsssrsoncrsvnsenees British Thermal Unit CAEC Central Alaska Engineering Company CCF Hundreds of Cubic Feet CEL .....csssscssrssssesncosscoesevevesoareseccasenasenssevsnssscucsasonrenessecssacsosssssoesesesssersnsreesseescseasees Compact Fluorescent CFM Cubic Feet per Minute DDC Direct Digital Control eg F........cccssssssssvressvevarsesnsvorscessascnessesssasenenesonsesesssssnssonesoneancensenseenssenneossessonessoassorsssssesssesssoorenes Degrees Fahrenheit DHW Domestic Hot Water ECI Energy Cost Index EEM Energy Efficiency Measure EMCS Energy Management Control System EPA Environmental Protection Agency EUI Energy Utilization Index hr(s)Hour(s) HP Horsepower HPS High Pressure Sodium IXY .....ccsssesersreevensscesesesesers Heating and Ventilation IES.....Illuminating Engineering Society IGA Investment Grade Audit kBtu Thousands of British Thermal Units kWh Kilowatt Hour LED.......Light Emitting Diode LPSD Lake and Peninsula School District ORNL ...Oak Ridge National Laboratory sf.Square Feet SIR Savings to Investment Ratio SP Simple Payback W coves Watts AkWarm ID No.BBNC-ILI-CAEC-02 PAGE iii OF iv CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT REPORT DISCLAIMER This Investment Grade Audit (IGA)was performed using American Recovery and Reinvestment Act (ARRA)funds,managed by Alaska Housing Finance Corporation (AHFC).IGA's are the property of the State of Alaska,and may be incorporated into AkWarm-C,the Alaska Retrofit Information System (ARIS),or other state and/or public information systems.AkWarm-C is a building energy modeling software developed under contract by AHFC. This material is based upon work supported by the Department of Energy under Award Number DE- EE0000095.This report was prepared as an account of work sponsored by an agency of the United States Government.Neither the United States Government nor any agency thereof,nor any of their employees,makes any warranty,express or implied,or assumes any legal liability or responsibility for the accuracy,completeness,or usefulness of any information,apparatus,product,or process disclosed, or represents that its use would not infringe privately owned rights.Reference herein to any specific commercial product,process,or service by trade name,trademark,manufacturer,or otherwise does not necessarily constitute or imply its endorsement,recommendation,or favoring by the United States Government or any agency thereof.The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. This energy audit is intended to identify and recommend potential areas of energy savings,estimate the value of the savings and approximate the costs to implement the recommendations.Any modifications or changes made to a building to realize the savings must be designed and implemented by licensed, experienced professionals in their fields.Lighting recommendations should all be first analyzed through a thorough lighting analysis to assure that the recommended lighting upgrades will comply with State of Alaska Statute as well as Illuminating Engineering Society (IES)recommendations.Central Alaska Engineering Company bears no responsibility for work performed as a result of this report. Payback periods may vary from those forecasted due to the uncertainty of the final installed design, configuration,equipment selected,and installation costs of recommended Energy Efficiency Measures (EEMs),or the operating schedules and maintenance provided by the owner.Furthermore,EEMs are typically interactive,so implementation of one EEM may impact the cost savings from another EEM. Neither the auditor,Central Alaska Engineering Company,AHFC,nor any other party involved in preparation of this report accepts liability for financial loss due to EEMs that fail to meet the forecasted payback periods. This energy audit meets the criteria of a Level 2 IGA per the American Society of Heating, Refrigeration,Air-conditioning Engineers (ASHRAE).The life of the IGA may be extended on a case- by-case basis,at the discretion of AHFC. AkWarm ID No.BBNC-ILI-CAEC-02 PAGE iv OF iv CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT 1.0 EXECUTIVE SUMMARY This report presents the findings of an investment grade energy audit conducted for: AlaskaHousingFINANCECORPORATION Lake and Peninsula School District Alaska Housing Finance Corporation Contact:Tim McDermott Contact:Rebekah Luhrs PO Box 498 4300 Boniface Parkway King Salmon,AK 99613 Anchorage,AK 99510 Email:tmcdermott@Ipsd.com Email:rluhrs@ahfc.us This audit was performed using ARRA funds to promote the use of innovation and technology to solve energy and environmental problems in a way that improves the State's economy.This can be achieved through the wiser and more efficient use of energy. The purpose of the energy audit is to identify cost-effective system and facility modifications, adjustments,alterations,additions and retrofits.Systems investigated during the audit included heating, ventilation,and air conditioning (HVAC),interior and exterior lighting,motors,building envelope,and energy management control systems (EMCS). The July 2008 -June 2010 average annual utility costs at this facility are as follows: Electricity $37,449 Fuel Oil $21,720 Total $59,169 Energy Utilization Index:97.6 kBtu/sf Energy Cost Index:6.08 $/sf Energy Use per Occupant:23.7 MMBtu per Occupant Energy Cost per Occupant:$1,479 per Occupant The potential annual energy savings are shown on the following page in Table 1.1 which summarizes the Energy Efficiency Measures (EEM's)analyzed for Tanalian School.Listed are the estimates of the annual savings,installed cost,and two different financial measures of return on investment.Be aware that the measures are not cumulative because of the interrelation of several of the measures.The cost of each measure for this level of auditing is considered to be +30%until further detailed engineering, specifications,and hard proposals are obtained. AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 1 OF 20 TANALIAN SCHOOL ENERGY AUDIT REPORTCENTRALALASKAENGINEERINGCOMPANY Table 1.1:Priority List -Energy Efficiency Measures ; :Simple ,.Annual Energy Savings to Rank Feature Improvement Description Savings 'neva Investment Pay backK|OF (w/Maint.Savings)|.©°S*|Ratio,SiR?|(*/Maint.Savings 1 |Below-Grade Install R-30 Fiberglass Batts on $421 $2,186 4.56 5.2 Floor,the Perimeter 4 feet of the Crawl Perimeter:Space Floor. Crawlspace 2 |HVAC And Place DHW circ pump on timer $426 $2,500 4.63 5.9 DHW [$2500]($100)(4.8) 3 |Lighting -Add new Occupancy Sensor and $756 $4,800 8.61 6.3 Combined Controls for Gym Lights. Retrofit:2 bulb TS 4 |Below-(part or |Add R-19 fiberglass batts to $714 $9,997 1.69 14.0 all)Grade Wall:|masonry wall.Cost does not Crawlspace include studs or firring strips. 5 |Setback Implement a Heating $1,047 $9,690 1.47 9.3 Thermostat:2nd |Temperature Unoccupied Floor Setback to 60.0 deg F for the 2nd Floor space. 6 |Lighting -Replace with 89 FLUOR (2)T8 $3,811 $42,000 1.45 11.0 Combined 4'F32T8 25W Energy-Saver ($1,335)(8.2) Retrofit:2 bulb |Program HighEfficElectronic T12 and Add new Occupancy Sensor 7 |Setback Implement a Heating $1,457 $15,690 1.26 10.8 Thermostat:Temperature Unoccupied Gym Setback to 60.0 deg F for the Gym space. 8 |Lighting -Replace with 7 LED 25W $1,006 $16,000 1.26 15.9 Combined Module StdElectronic and Add ($700)(9.4) Retrofit:HPS new Occupancy Sensor 9 |Setback Implement a Heating $797 $9,690 1.12 12.2 Thermostat:1st |Temperature Unoccupied Floor Setback to 60.0 deg F for the Ist Floor space. 10 |Lighting -Replace with 70 FLUOR (2)T8 $1,506 $33,600 0.90 22.3 Combined 4'F32T8 25W Energy-Saver ($1,050)3.1) Retrofit:2 bulb |Program HighEfficElectronic T8 and Add new Occupancy Sensor TOTAL,all $11,940 |$146,153 1.61 12.2 measures ($3,185)(9.7) AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 2 OF 20 CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT Table Notes: '.Cost estimates were generated using the Program Demand Cost Model for Alaskan Schools,12"Edition,Updated 2011,developed for the State of Alaska DOE,Education Support Services/Facilities.Renovations Projects Manual provides information on school renovation costs.Upon developing a final scope of work for an upgrade with detailed engineering completed,detailed savings and benefits can then be better determined.Some of the EEM's should be completed when equipment meets the burn-out phase and is required to be replaced and in some cases will take significant investment to achieve. 2 Savings to Investment Ratio (SIR)is a life-cycle cost measure calculated by dividing the total savings over the life of a project (expressed in today's dollars)by its investment costs.The SIR is an indication of the profitability of a measure;the higher the SIR,the more profitable the project.An SIR greater than 1.0 indicates a cost-effective project (i.e.more savings than cost). Remember that this profitability is based on the position of that Energy Efficiency Measure (EEM)in the overall list and assumes that the measures above it are implemented first. s Simple Payback (SP)is a measure of the length of time required for the savings from an EEM to payback the investment cost,not counting interest on the investment and any future changes in energy prices.It is calculated by dividing the investment cost by the expected first-year savings of the EEM. With all of these energy efficiency measures in place,the annual utility cost can be reduced by $11,940 per year,or 19.8%of the buildings'total energy costs.These measures are estimated to cost $146,153, for an overall simple payback period of 12.2 years.If only the cost-effective measures are implemented (i.e.SIR >1.0),the annual utility cost can be reduced by $10,434 per year,or 17.3%of the buildings' total energy costs.These measures are estimated to cost $112,553,for an overall simple payback period of 10.8 years. Table 1.2 is a breakdown of the annual energy cost across various energy end use types,such as Space Heating and Water Heating.The first row in the table shows the breakdown for the building as it is now.The second row shows the expected breakdown of energy cost for the building assuming all of the retrofits in this report are implemented.Finally,the last row shows the annual energy savings that will be achieved from the retrofits. Table 1.2:Annual Energy Cost Estimations ,a Space '|Water -en re 'Other Ventilation |-TotalDescriptionHeating_|Heating Lighting Refrigeration Electrical |Fans Cost ExistiBuilding $28,784 |$8,052 |$13,290 $1,876 |$563}$7,840}$60,405 With All Proposed $25,231 $6,744 $6,211 $1,876 $563 $7,840 $48,465 Retrofits SAVINGS $3,553 $1,308 $7,079 $0 $0 $0 $11,940 AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 3 OF 20 CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT Administrative Controls for Energy Efficiency Optimization: While the intent of many Energy Efficiency Measures is to increase the efficiency of fuel-burning and electrical equipment,an important factor of energy consumption lies in the operational profiles which control the equipment usage.Such profiles can be managed by administrative controls and departmental leadership.They determine how and when equipment is used,and therefore have a greater impact on energy savings potential than simple equipment upgrades alone.Significant energy cost savings can be realized when EEMs are combined with efficient minded operational profiles. Operational profiles may be outlined by organization policy or developed naturally or historically. These profiles include,but are not limited to;operating schedules,equipment set-points and control strategies,maintenance schedules,and site and equipment selection. Optimization of operational profiles can be accomplished by numerous methods so long as the intent is reduction in energy-using equipment runtime.Due to the numerous methods of optimization,energy cost savings solely as a result of operational optimization are difficult to predict.Quantification, however,is easy to accomplish by metering energy usage during and/or after implementation of energy saving operational profiles and EEMs. Optimization of site selection includes scheduling and location of events.If several buildings in a given area are all lightly used after regularly occupied hours,energy savings can be found when after-hour events are consolidated and held within the most energy efficient buildings available for use.As a result,unoccupied buildings could be shut-down to the greatest extent possible to reduce energy consumption. Operational behaviors which can be combined with equipment upgrades are operating schedules and equipment control strategies including set-points.Occupancy and daylight sensors can be programmed to automatically shut-off or dim lighting when rooms are unoccupied or sufficiently lit from the sun. Operating schedules can be optimized to run equipment only during regular or high-occupancy periods. Also,through a central control system,or with digital programmable thermostats,temperature set-points can be reduced during low-occupancy hours to maximize savings.In addition,domestic hot water circulation systems and sporadically used equipment can be shut-down during unoccupied hours to further save energy.In general,having equipment operating in areas where no occupants are present is inefficient,and presents an opportunity for energy savings. Operational profiles can also be implemented to take advantage of no or low cost EEMs.Examples include heating system optimizations (boiler section cleaning,boiler flush-through cleaning,and completing preventative maintenance on outside air damper and temperature reset systems)and tighter controls of equipment set-backs and shut-downs (unoccupied zones equipment shut-down,easier access to and finer control of equipment for after-hours control).In a large facility management program, implementation of these measures across many or all sites will realize dramatic savings due to the quantity of equipment involved. Changes to building operational profiles can only be realized while simultaneously addressing health,safety,user comfort,and user requirements first.It is impractical to expect users to occupy a building orimplementoperationalbehaviorswhichdonotmeetsuchconsiderations.That said,it is quite practical for management groups to implement administrative controls which reduce losses brought about by excess and sub-optimum usage. AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 4 OF 20 CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT 2.0 INTRODUCTION This comprehensive energy audit covers the 9,730 square foot Tanalian School,depicted below in Figure 2.1,including classrooms,restrooms,a kitchen,and a gymnasium.This school also features a boiler room and teacher housing facilities,all of which are separate buildings that are not connected to the main school.The teacher housing building on campus is being used throughout the school year.fMSaFigure 2.1:Tanalian School -Floor Plan View Utility information was collected and analyzed for two years of energy use by the building.This information was used to analyze operational characteristics,calculate energy benchmarks for comparison to industry averages,estimate savings potential and establish a baseline to monitor the effectiveness of implemented measures.An excel spreadsheet was used to enter,sum,and calculate benchmarks and to graph energy use information (refer to AppendixA for the Benchmark Report). The Annual Energy Utilization Index (EUI)is expressed in Thousands of British Thermal Units/Square Foot (kBtu/sf)and can be used to compare energy consumption to similar building types or to track consumption from year to year in the same building.The EUI is calculated by converting annual consumption of all fuels used to Btu's then dividing by the area (gross conditioned square footage)of the building.EUI is a good indicator of the relative potential for energy savings.A comparatively low EUI indicates less potential for large energy savings.Building architectural drawings were utilized to calculate and verify the gross area of the facility.The gross area was confirmed on the physical site investigation.Refer to Section 6.0 of this report for additional details on EUI issues. AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 5 OF 20 CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT After gathering the utility data and calculating the EUI,the next step in the audit process was to review the drawings to develop a building profile which documented the building age,type,usage,and major energy consuming equipment or systems such as lighting,heating and ventilation (H&V),domestic hot water heating,refrigeration,etc.The building profile is utilized to generate,and answer,possible questions regarding the facility's energy usage.These questions were then compared to the energy usage profiles developed during the utility data gathering step.After this information is gathered,the next step in the process is the physical site investigation (site visit). The site visit was completed on June 3,2012 and was spent inspecting the actual systems and answering specific questions from the preliminary review.Occupancy schedules,O&M practices,building energy management program,and other information that has an impact on energy consumption were obtained. Photos of the major equipment and building construction were taken during the site visit.Several of the site photos are included in this report as Appendix D. Additionally during the site visit,thermal images of the building's exterior were taken.These thermal images illustrate heat loss exhibited by the school.Several of the thermal images are included in this report as Appendix E. The post-site work includes evaluation of the information gathered during the site visits,developing the AkWarm-C Energy Model for the building,researching possible conservation opportunities,organizing the audit into a comprehensive report,and making recommendations on mechanical,electrical and building envelope improvements. AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 6 OF 20 CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT 3.0 METHOD OF ANALYSIS Central Alaska Engineering Company (CAEC)began the site survey after completing the preliminary audit tasks noted in Section 2.0.The site survey provided critical input in deciphering where energy opportunities exist within the facility.The audit team walked the entire site to inventory the building envelope (roof,walls,windows and doors,etc.),the major equipment including HVAC,water heating, lighting,and equipment in kitchens,offices,gymnasium,and classrooms.The site survey was used to determine an understanding of how the equipment is used. The collected data was entered into the AkWarm-C Commercial©Software (AkWarm-C),a building energy modeling program developed for Alaska Housing Finance Corporation (AHFC).The data was processed by AkWarm-C to model a baseline from which energy efficiency measures (EEMs)could be considered.The model was compared to actual utility costs to ensure the quality of baseline and proposed energy modeling performed by AkWarm-C.The recommended EEMs focus on the building envelope,HVAC systems,water heating,lighting,and other electrical improvements that will reduce annual energy consumption. EEMs are evaluated based on building use and processes,local climate conditions,building construction type,function,operational schedule,existing conditions,and foreseen future plans.Energy savings are calculated based on industry standard methods and engineering estimations.When new equipment is proposed,energy consumption is calculated based on the manufacturer's information where possible. Energy savings are calculated by AkWarm-C. Implementation of more than one EEM often affects the savings of other EEMs.The savings may in some cases be relatively higher if an individual EEM is implemented in lieu of multiple recommended EEMs.For example,implementing reduced operating schedule for specific inefficient lighting systems will result in a greater relative savings than merely replacing fixtures and bulbs.Implementing reduced operating schedules for newly installed efficient lighting will result in a lower relative savings,because there is less energy to be saved.If multiple EEM's are recommended to be implemented,the combined savings is calculated and identified appropriately. Cost savings are calculated based on the historical energy costs for the building.Cost estimates weregeneratedusingtheProgramDemandCostModelforAlaskanSchools,12""Edition,Updated 2011, developed for the State of Alaska DOE,Education Support Services/Facilities.Renovations Projects Manual provides information on school renovation costs.The Geographic Area Cost Factor dated April 2011 for the Port Alsworth area has an index of 160.73 and was used in this report.Installation costs include design,labor,equipment,overhead and profit for school renovation projects and used to evaluate the initial investment required to implement an EEM.These are applied to each recommendation with simple paybacks calculated.In addition,where applicable,maintenance cost savings are estimated and applied to the net savings. The costs and savings are applied and a Simple Payback (SP)and Savings to Investment Ration (SIR) are calculated.These are listed in Section 7.0 and summarized in Table 1.1 of this report.The SP is based on the years that it takes for the net savings to payback the net installation cost (Cost divided by Savings).The SIR is calculated as a ratio by dividing the break even cost by the initial installed cost. The lifetime for each EEM is estimated based on the typical life of the equipment being replaced or altered.The energy savings is extrapolated throughout the lifetime of the EEM.The total energy savings is calculated as the total lifetime multiplied by the yearly savings. AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 7 OF 20 CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT The analysis provides a number of tools for assessing the cost effectiveness of various improvement options.These tools utilize Life-Cycle Costing,which is defined in this context as a method of cost analysis that estimates the total cost of a project over the period of time that includes both the construction cost and ongoing maintenance and operating costs. Savings to Investment Ratio (SIR)=Savings divided by Investment Savings includes the total discounted dollar savings considered over the life of the improvement.When these savings are added up,changes in future fuel prices (usually inflationary)as projected by the Alaska Department of Energy are included in the model.Future savings are discounted to the present to account for the time-value of money (i.e.money's ability to earn interest over time).The Investment in the SIR calculation includes the labor and materials required to install the measure.An SIR value of at least 1.0 indicates that the project is cost-effective -total savings exceed the investment costs. Simple payback is a cost analysis method whereby the investment cost of a project is divided by the first year's savings of the project to give the number of years required to recover the cost of the investment.This may be compared to the expected time before replacement of the system or component will be required.For example,if a boiler costs $50,000 and results in a savings of $5,000 a year,the payback time is 10 years.If the boiler has an expected life to replacement of 20 years,it would be financially viable to make the investment since the payback period of 10 years is less than the project life. The Simple Payback calculation does not consider likely increases in future annual savings due to energy price increases.As an offsetting simplification,Simple Payback does not consider the need to earn interest on the investment (i.e.it does not consider the time-value of money).Because of these simplifications,the SIR figure is considered to be a better financial investment indicator than the Simple Payback measure. AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 8 OF 20 CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT 4.0 LIMITATIONS OF STUDY All results are dependent on the quality of input data provided.In this case the site investigation was limited to observable conditions.No testing or destructive investigations were undertaken.Although energy-conserving methods are described in the EEMs,in some instances several methods may also achieve the identified savings.Detailed engineering is required in order to develop the EEMs to a realizable project.This audit and report are thus intended to offer approximations of the results achievable by the listed improvements.This report is not intended to be a final design document.The design professional or other persons following the recommendations shall accept responsibility and liability for the results. AkWarm-C Building Simulations An accurate model of the building performance can be created by simulating the thermal performance of the walls,roof,windows and floors of the building.The HVAC system and central plant are modeled as well,accounting for the outside air ventilation required by the building and the heat recovery equipment in place. The model uses local weather data and is trued up to historical energy use to ensure its accuracy.The model can be used now and in the future to measure the utility bill impact of all types of energy projects, including improving building insulation,modifying glazing,changing air handler schedules,increasing heat recovery,installing high efficiency boilers,using variable air volume air handlers,adjusting outside air ventilation and adding cogeneration systems. For the purposes of this study,Tanalian School was modeled using AkWarm-C energy use software to establish a baseline space heating and cooling energy usage.Climate data from Port Alsworth,Alaska was used for analysis.From this,the model was be calibrated to predict the impact of theoretical energy savings measures.Once annual energy savings from a particular measure were predicted and the initial capital cost was estimated,payback scenarios were approximated.Project cost estimates are provided in the Section 7.0 of this report reviewing the Energy Efficiency Measures. Limitations ofAkWarm-C Models Limitations of the AAWarm-C_Commercial©Software are reviewed in this section.The AkWarm-C model is based on typical mean year weather data for Port Alsworth,Alaska.This data represents the average ambient weather profile as observed over approximately 30 years.As such,the fuel oil and electric profiles generated will not likely compare perfectly with actual energy billing information from any single year.This is especially true for years with extreme warm or cold periods,or even years with unexpectedly moderate weather. The heating and cooling load model is a simple two-zone model consisting of the building's core interior spaces and the building's perimeter spaces.This simplified approach loses accuracy for buildings that have large variations in cooling/heating loads across different parts of the building. AkWarm-C does not model HVAC systems that simultaneously provide both heating and cooling to the same building space (typically done as a means of providing temperature control in the space). The energy balances shown were derived from the output generated by the AkWarm-C simulations. AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 9 OF 20 CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT 5.0 BUILDING DESCRIPTION The structure of Tanalian School is a two-story facility that was built in 1983.This building has had one (1)addition made to it,adding more classroom space in 2007.From the audit it was determined to be a well built and functional school facility.The school typically opens at 7AM by staff with faculty and student occupancy to 4PM during the weekdays.Additional occupancy time keeping the school open late or on weekends occurs occasionally.There are an estimated 40 full time students,faculty,and staff occupants using the building. Descrintion of the Building Shell The insulation values and conditions were modeled using the data provided in the architectural drawings.No destructive testing was completed for the audit.The following are the assumptions made for the AkWarm-C building model: Exterior walls of the building have double paned,vinyl framed windows in place which have an estimated U-factor of 0.33 Btu/hr-sf-F.These windows are in good condition.All doors on this building are commercial grade,insulated and metal framed that are windowed or solid.The doors appear to be in adequate condition,but could use additional weather stripping installed. The crawlspace walls of the school consist of an all-weather wood exterior with 6-inch studs and insulated on the outside with 2-inches of rigid foam board.The above grade wall sections of the school are made up of 6-inch studs filled with fiberglass batt insulation,providing an estimated R-18 composite value.Wall height varies from 15 feet to 30 feet,depending on location.The different wall constructions can be noted in the IR images provided in Appendix E of this report. The roof system is a cathedral ceiling insulated with fiberglass batt for an estimated R-40 insulating value.The entirety of the roof is covered with corrugated metal roofing. Descrintion of the Heating Plants Heat is provided to the school mainly through a waste heat recovery system,using the waste heat from the nearby village generators.In the generator building,there are circulation pumps which appear to be in continuous operation,attempting to remove heat from the generators.This is causing the school heating system to be uncontrolled,and can get overheated requiring the windows to be opened to reduce the heat.This pump needs to be shut down to save energy when the school does not require heating and the excess heat should be dumped elsewhere.In addition to the waste heat,the building is heated by two (2)fuel oil-fired sectional boilers,which were installed in the year 2009.The boilers are located in the detached boiler building,which is small in size but neatly configured.The hydronic heating system is circulated throughout the building by two 1%HP circulation pumps located in the mechanical room. Heated water is supplied to the entire school campus and the teacher housing units using these circulating pumps.The hydronic heat is delivered to the Air Handling Units (AHU),unit heaters,and baseboard radiators through the various building hydronic loops.This building has a DDC control system in place with end devices using electronic controls.The heating plants used in the building are described on the following page. AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 10 OF 20 CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT Boiler's 1 &2 Fuel Type: Input Rating: Rated Efficiency: Heat Distribution Type: Boiler Operation: Waste Heat System Fuel Type: Input Rating: Rated Efficiency: Heat Distribution Type: Boiler Operation: Fuel Oil 588,000 Btu/hr OR 4.2 gal/hr 82 %(estimated) Hydronic,Water All Year Waste Heat 500,000 Btu/hr (estimated) N/A Hydronic,Water All Year A Btu meter is recommended to be installed on the waste heat supply so that the amount of energy being used from the system can be recorded and monitored to permit an overall heating system evaluation. Usage from the waste heat system had to be estimated for this audit as actual numbers were not available. Descrintion of the Domestic Hot Water System Domestic Hot Water (DHW)is supplied by an indirect-fired storage hot water maker.DHW is circulated 24/7 around the building and supplies hot water to the showers,restrooms,kitchen,and the various sinks in the building. Storage Water Heater Fuel Type:Side-arm Input Rating:199,990 Btu/hr (estimated) Rated Efficiency:80 %(estimated) Heat Distribution Type:Circulation 24/7 DHW Maker Operation:All Year Description of the Building Ventilation Systema There is one (1)AHU located inside of the building providing ventilation to the school.The AHU's use electronically controlled end devices,controlled by the DDC system.Outside air is drawn into the building primarily through windows and this AHU,when operated.Excess air is removed from the building with the use of exhaust fans located throughout the building as well as an intertied return fan. The International Mechanical Code for this application requires the building to bring in 3,406 CFM of outdoor air (minimum design for classroom space specifies 35 occupants/1,000 sf @ 10 CFM/occupant for the 9,730 sf school =3,405.5 CFM).The combined capacity of the exhaust fans equals approximately 1,900 CFM,indicating the school appears to be over-ventilated at 47.5 CFM/occupant, assuming the exhaust system is operated per design capacity and at current occupant level of 40 during school hours.The outdoor air should never be provided at less than 10 CFM/occupant to be code compliant. AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 11 OF 20 CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT Descrintion of the Lichting Systems There are several types of light systems throughout the building.The majority of the building uses older T12 and T8 lights.Often times it was found that T12 and T8 lights were sharing the same fixture.The gym lighting system uses a new T5 HO system.The T12 lighting systems remaining in the building were evaluated for replacement to new Energy-Saver T8,programmable start electronic ballast and occupancy sensor based controls.The High Pressure Sodium (HPS)lights mounted on the outside of the building are also good candidates for replacement.There have been recent advances in LED technology making it a viable option to replace the HPS systems.Several EEM's are provided in this report reviewing the lighting system upgrade recommendations. Description of the Plus Loads There are several large plug loads throughout the building.This includes the computers with monitors, copy machines,refrigerators,appliances,microwave ovens and coffee pots.These building plug loads are estimated in the AkWarm-C modeling program at 0.1 watts/sf. Description of the Maior Kauioment Following the completion of the field survey a detailed building major equipment inventory was created and is attached as Appendix C.The equipment listed is considered to be the major energy consuming items in the building whose replacement or upgrade could yield substantial energy savings. An approximate age was assigned to the equipment if a manufactured date was not shown on the equipment's nameplate.As listed in the 2011 ASHRAE Handbook for HVAC Applications,Chapter 37,Table 4,the service life for the equipment along with the remaining useful life in accordance to the ASHRAE standard are also noted in the equipment list. Where there are zero (0)years remaining in the estimated useful life of a piece of equipment,this is an indication that maintenance costs are likely on the rise and more efficient replacement equipment is available which will lower the operating costs of the unit.Maintenance costs should also fall with the replacement. AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 12 OF 20 CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT 6.0 ENERGY CONSUMPTION AND COST Tables provided in Appendix A,Energy Benchmark Data Report,represent the electric and fuel oil energy usage for the surveyed facility from July 2008 to June 2010.Electricity is provided by the village power plant under their large commercial rate schedules.Fuel Oil is being provided under a contract to top off the tanks. The electric utility bills for consumption in kilowatt-hours (kWh)and for maximum demand in kilowatts (kW).One kilowatt-hour is equivalent to 3,413 Btu's.The consumption (kWh)is determined as the wattage times the hours it is running.For example,1,000 watts running for one hour,or 500 watts running for two hours is a kWh.The maximum demand is simply the sum of all electrical devices on simultaneously.For example,ten,100 watt lights running simultaneously would create a demand of 1,000 watts (1 kW).Demand is averaged over a rolling window,usually 15 minutes.Thus,the facility must be concerned not only with basic electricity usage (consumption)but also the rate at which it gets used.The basic usage charges are shown as generation service and delivery charges along with several non-utility generation charges. The fuel oil usage profile shows the predicted fuel oil energy usage for the building.As actual oil usage records were available,the model used to predict usage was calibrated to approximately match actual usage.Fuel oil is sold to the customer in units of gallon (GAL),which contains approximately 140,000 BTUs of energy. The average billing rates for energy use are calculated by dividing the total cost by the total usage. Based on the electric and fuel oil utility data provided,the 2008-2009 through 2009-2010 school year costs for the energy and consumption at the surveyed facility are summarized in Table 6.1 below. Table 6.1:Emergy Costs and Consumption Data for 2008-2009 and 2009-2010 i 2008-2009.'|2009-2010 Average. Electric 0.70 $/kWh 0.63 $/kWh 0.67 $/kWh Fuel Oil 5.58 $/GAL 5.58 $/GAL 5.58 $/GAL Total Cost $59,109 $59,229 $59,169 ECI 6.07 $/sf 6.09 $/sf 6.08 $/sf Electric EUI 18.7 kBtu/sf 20.9 kBtu/sf 19.8 kBtu/sf Fuel Oil EUI 52.8 kBtu/sf 52.8 kBtu/sf 52.8 kBtu/sf Waste Heat EUI 25.0 kBtu/sf 25.0 kBtu/sf 25.0 kBtu/sf Building EUI 96.5 kBtu/sf 98.7 kBtu/sf 97.6 kBtu/sf Data from the U.S.A.Energy Information Administration provides information for U.S.A.Commercial Buildings Energy Intensity Using Site Energy by Census Region.In 2003,the U.S.A.average energy usage for Education building activity is shown to be 83.0 kBtu/sf. For reference,data from the ARRA funded utility benchmark survey for the subject fiscal years completed on 84 schools in the Anchorage School District computed an average EUI of 106.5 kBtu/sf, and ECI of 1.77 $/sf,with an average building size of 86,356 square feet. Over the analyzed period,the surveyed facility was calculated to have an average EUI of 97.6 kBtu/sf. This means the surveyed facility uses a total of 17.6%more energy than the US average and 8.4%less energy than the Anchorage School District average on a per square foot basis. AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 13 OF 20 CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT ProjectedEnergy Use and Cost Breakdown At current utility rates,the Lake and Peninsula School District is modeled to pay approximately $60,405annuallyforelectricityandotherfuelcostsfortheTanalianSchool. Figure 6.1 below reflects the estimated distribution of costs across the primary end uses of energy based on the AkWarm-C computer simulation.Comparing the "Retrofit”bar in the figure to the "Existing”bar shows the potential savings from implementing all of the energy efficiency measures shown in this report. Annual Energy Costs by End Use $80,000 MI Ventilation and Fans MMM Space Heating WMH Refrigeration Other Electrical60,000$60,000 "MTS EEE Lighting HM Domestic Hot Water $40,0004 $20,000 $0-a 'Existing Retrofit Figure 6.1;Annual Emergy Costs by End Use Figure 6.2 below shows how the annual energy cost of the building splits between the different fuels used by the building.The "Existing”bar shows the breakdown for the building as it is now;the "Retrofit”bar shows the predicted costs if all of the energy efficiency measures in this report are implemented. Annual Energy Costs by Fuel $80,000 $60,000 $40,0004 $20,000 $04 Existing Retrofit HEH Hot Wtr District Ht #2 Oil WM Electricity Figure 6.2:Annual Energy Costs by Fuel Type AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 14 OF 20 CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT Figure 6.3 below addresses only Space Heating costs.The figure shows how each heat loss component contributes to those costs;for example,the figure shows how much annual space heating cost is caused by the heat loss through the Walls/Doors.For each component,the space heating cost for the Existing building is shown (blue bar)and the space heating cost assuming all retrofits are implemented (yellow bar)are shown.It should be noted that the retrofit bar for the windows is actually showing a slight negative associated cost,implying that the windows will be adding to the building heating load. Annual Space Heating Cost by Component Air Be tee Seg eet LE ON OL TNE re Be ort rh ee Ceiling 4 Window Wall/Door5 Floor -$5,000 $0 $5,000 $10,000 $15,000 $20,000 WM Existing E229 Retrofit Figure 6.3:Annual Space Heating Cost by Compoment The tables below show AkWarm-C 's estimate of the monthly fuel use for each of the fuels used in the building.For each fuel,the fuel use is broken down across the energy end uses. Table 6.2:AkWarm-C Estimated Monthly Electrical Consumption Electrical Consumption (kWh) Jan |Feb |Mar |Apr |May |Jun |Jul |Aug |Sept |Oct |Nov |DecLighting|2045 |1864 [2045]1979 [1990 [|318]329]1215]1979 |2045]1979]2045Refrigeration238217238230238230238238230238230238 Other Electrical 88 80 88 85 86 7 8 49 85 88 85 88 Ventilation Fans [|1214 [1106 |1214[1175 {1180]161 166 |707 |1175 |1214]1175 |1214 DHW 28 25 28 27 28 27 28 28 27 28 27 28 Space Heating |1882 {1715 |1882 |1821 |1882[1821 [1882]1882 |1821]1882[1821 {1882 Table 6.3;AkWarm-C Estimated Monthly Fuel Oil Consumption Fuel Oi]Consumption (Gallons) Jan |Feb |Mar |Apr |May |Jun |Jul |Aug |Sept |Oct |Nov |DecDHW|_105 97 108 {109 123 |135]139]139 127 {113 |104]105 Space Heating |468 [388]347{|191 76 0 0 0 30 |192 {322[482 Table 6.4:AkWarm-C Estimated Monthly Waste Heat Consumption Hot Water Waste Heat Consumption (Million Btu) Jan |Feb |Mar |Apr |May |Jun |Jul |Aug {Sept |Oct |Nov |Dec DHW 7 6 7 7 8 9 9 9 8 7 7 7 Space Heating |29]24 22 12 5 0 0 0 2 12 20 30 AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 15 OF 20 CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT Utilization Index (H Energy Utilization Index (EUI)is a measure of a building's annual energy utilization per square foot of building.This calculation is completed by converting all utility usage consumed by a building for one year,to British Thermal Units (Btu)or kBtu's,and dividing this number by the building square footage. EUI is a good measure of a building's energy use and is utilized regularly for comparison of energy performance for similar building types.The Oak Ridge National Laboratory (ORNL)Buildings Technology Center under a contract with the U.S.Department of Energy maintains a Benchmarking Building Energy Performance Program.The ORNL website determines how a building's energy use compares with similar facilities throughout the U.S.and in a specific region or state. Source use differs from site usage when comparing a building's energy consumption with the national average.Site energy use is the energy consumed by the building at the building site only.Source energy use includes the site energy use as well as all of the losses to create and distribute the energy to the building.Source energy represents the total amount of raw fuel that is required to operate the building.It incorporates all transmission,delivery,and production losses,which allows for a complete assessment of energy efficiency in a building.The type of utility purchased has a substantial impact on the source energy use of a building.The EPA has determined that source energy is the most comparable unit for evaluation purposes and overall global impact.Both the site and source EUI ratings for the building are provided to understand and compare the differences in energy use. The site and source EUIs for this building are calculated as follows.(See Table 6.4 for details): Building Site EUI =(Electric Usage in kBtu +Fuel Oil Usage in kBtu) Building Square Footage Building Source EUI =(Electric Usage in kBtu X SS Ratio +Fuel Oil Usage in kBtu X SS Ratio) Building Square Footage where "SS Ratio”is the Source Energy to Site Energy ratio for the particular fuel. Table 6.5:Tanalian School EUI Calculations Source Energy Building Fuel Use per Site Energy Use Source/Site Use per Year, Energy Type Year per Year,kBTU Ratio kBTU Electricity 57,674 kWh 196,843 3.340 657,456 #2 Oil 3,900 gallons 538,229 1.010 543,611 Hot Wtr District Ht 246.55 million Btu 246,553 1.280 315,587 Total 981,625 1,516,654 BUILDING AREA 9,730 Square Feet BUILDING SITE EUI 101.kBTU/Ft?/Yr BUILDING SOURCE EUI 156 kBTU/Ft?/Yr *Site -Source Ratio data is provided by the Energy Star Performance Rating Methodology for Incorporating Source Energy Use document issued March 2011. AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 16 OF 20 CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT 7.0 ENERGY EFFICIENCY MEASURES The Energy Efficiency Measures are summarized below: Electrical &Appliance Measures The goal of this section is to present lighting energy efficiency measures that may be cost beneficial.It should be noted that replacing current bulbs with more energy-efficient equivalents will have a small effect on the building heating and cooling loads.The building cooling load will see a small decrease from an upgrade to more efficient bulbs and the heating load will see a small increase,as the more energy efficient bulbs give off less heat. Rank |Location Existing Condition Recommendation 3 2 bulb T5 14 FLUOR (2)TS 45.2"F54W/TS HO Standard Add new Occupancy Sensor and controls. StdElectronic with Manual!Switching Installation Cost $4,800]Estimated Life of Measure (yrs)15]Energy Savings (S/yr)$756 Breakeven Cost $8,880]Savings-to-Investment Ratio 1.9]Simple Payback (yrs)6 Auditors Notes:This EEM recommends installation of a lighting control package with occupancy sensors and multi-level switching to reduce the gym lighting energy consumption. Rank |Location Existing Condition Recommendation 6 2 bulb T12 89 FLUOR (2)T12 4'F40T12 34W Energy-Saver Replace with 89 FLUOR (2)T8 4'F32T8 25W Magnetic with Manual Switching Energy-Saver Program HighEfficElectronic and Add new Occupancy Sensor Installation Cost $42,000|Estimated Life of Measure (yrs)15]Energy Savings ($/yr)$3,811 Maintenance Savings ($/yr)$1,335 Breakeven Cost $60,705|Savings-to-Investment Ratio 1.4]Simple Payback (yrs)11 Auditors Notes:This EEM is recommending the existing 40-Watt T12 lights in the building be replaced with 25-Watt Energy Saver T8 bulbs and programmable start ballasts.Additionally,these lights should be installed with occupancy sensors,if not already,and controls for daylight harvesting. Rank _|Location Existing Condition |Recommendation 8 HPS 7 HPS 70 Watt Magnetic with Manual Switching Replace with 7 LED 25W Module StdElectronic and Add new Occupancy Sensor Installation Cost $16,000|Estimated Life of Measure (yrs)15]Energy Savings (S$/yr)$1,006 Maintenance Savings ($/yr)$700 Breakeven Cost $20,170]Savings-to-Investment Ratio 1.3}Simple Payback (yrs)16 Auditors Notes:All of the high pressure sodium lights mounted on the outside of the building are considered to be good candidates for replacement as the heat they emit is wasted to the outdoors.There have been recent advances in LED technology and arerecommendedtoreplacetheHPSsystems.This recommendation assumes a Dark Campus environment where the lights are turned off during the late evening and early morning hours and are turned on under motion sensor activation,security alarm activation,or when controlled by the Building Automation System,when available. AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 17 OF 20 CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT Rank Location Existing Condition Recommendation 10 2 bulb T8 70 FLUOR (2)T8 4'F32T8 32W Standard Instant Replace with 70 FLUOR (2)T8 4'F32T8 25W StdElectronic with Manual Switching Energy-Saver Program HighEfficElectronic and Add new Occupancy Sensor Installation Cost $33,600}Estimated Life of Measure (yrs)15|Energy Savings (S$/yr)$1,506 Maintenance Savings ($/yr)$1,050 Breakeven Cost $30,223]Savings-to-Investment Ratio 0.9}Simple Payback (yrs)22 Auditors Notes:This EEM is recommending the existing 32-Watt T8 lights in the building be replaced with 25-Watt Energy Saver T8 bulbs and programmable start ballasts.Additionally,these lights should be installed with occupancy sensors,if not already,and controls for daylight harvesting. Mechanical Equipment Measures Rank Recommendation 2 Place DHW circ pump on timer [$2500] Installation Cost $2,500]Estimated Life of Measure (yrs)30|Energy Savings (/yr)$426 Maintenance Savings (/yr)$100 Breakeven Cost $11,563]Savings-to-Investment Ratio 4.6]Simple Payback yrs Auditors Notes:This EEM recommends placing the domestic hot water circulation pump,for both the school and gym,on a timer. This will reduce water circulation when the school is not occupied,effectively reducing the amount of heat wasted during off-hours. Night Setback Thermostat Measures Rank Building Space Recommendation 5 2nd Floor Space Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the 2nd Floor space. Installation Cost $9,690|Estimated Life of Measure (yrs)15|Energy Savings ($/yr)$1,407 Breakeven Cost $14,219}Savings-to-Investment Ratio 1.5]Simple Payback (yrs) Auditors Notes:There are economic reasons why the thermostatic controller set points should be setback during off peak use hours.However one important control data input concerns the water dew point of the air.The water dew point of the inside air varies with the seasons.Currently,there is no humidity measuring instruments normally available to or monitored by the control system or staff and this data is needed before choosing the ideal "setback”temperatures which varies with the season.As outside air temperatures rise,the inside air dew point also rises.The staff is likely to complain about mildew and mold smells if the temperature is dropped below the dew point and condensation occurs.In keeping with this mildew and mold concern,it is recommended that the control system monitor the water dew point within the building to select how far back the temperature can be set during low use periods.If the water dew point is above 70 °F,then set up the temperature not back.If the water dew point is 50 °F or below,then reduce the setback temperature control toward 60°F. Other parameters relating to the building setback temperature include warm-up time required to reheat the building and preventing any water pipes near the building perimeter from freezing.During extreme cold periods,reducing the setback temperature limit and time appropriately is required to prevent possible problems. AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 18 OF 20 CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT Rank _|Building Space Recommendation 7 Gym Space Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Gy m space. Installation Cost $15,690]Estimated Life of Measure (yrs)15 Energy Savings (S/yr)$1,457 Breakeven Cost $19,783]Savings-to-Investment Ratio 1.3 Simple Payback (yrs)a Auditors Notes:See EEM #5 for similar notes. Rank |Building Space Recommendation 9 Ist Floor Space Implement a Heating Temperature Unoccupied Setback to 60.0 deg F for the Ist Floor space. Installation Cost $9,690]Estimated Life of Measure (yrs)15|Energy Savings (S/yr)$797 Breakeven Cost $10,822]Savings-to-Investment Ratio 1.1]Simple Payback (yrs)12 Auditors Notes:See EEM #5 for similar notes. Building Shell Measures Rank |Location Existing Type/R-Value Recommendation Type/R-Value 1 On-or Below-Grade Insulation for 0'to 2'Perimeter:None Install R-30 Fiberglass Batts on the Perimeter 4 feet of Floor,Perimeter:Insulation for 2'to 4'Perimeter:None the Crawl Space Floor. Crawlspace Modeled R-Value:14.6 Installation Cost $2,186|Estimated Life of Measure (yrs)30}Energy Savings (S/yr)$421 Breakeven Cost $9,975|Savings-to-Investment Ratio 4.6]Simple Payback (yrs)5 Auditors Notes:Addition of insulation to the perimeter of the floor area of the crawlspace will greatly help with heat retention in the building.A well fitted vapor barrier on the floor of the crawlspace will help the fiberglass batt to last longer. Rank Location Existing Type/R-Value Recommendation Type/R-Value 4 Below-(part or all) Grade Wall:Crawlspace Wall Type:All Weather Wood Insul.Sheathing:None Framed Wall:2 x 6,24"on center EPS Type I -psi 10,2 inches Modeled R-Value:12.1 Add R-19 fiberglass batts to crawlspace wall.Cost does not include studs or firring strips. Installation Cost $9,997|Estimated Life of Measure (yrs)30 Energy Savings (S/yr)$714 Breakeven Cost $16,932]Savings-to-Investment Ratio 1.7 Simple Payback (yrs)14 Auditors Notes:This EEM evaluates adding additional insulation to the crawlspace wall.This recommendation,coupled with the perimeter insulation mentioned in EEM #3 will help to reduce the heading load required by the school. AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 19 OF 20 CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT 8.0 CONCLUSION Through inspection of the energy-using equipment on-site and discussions with site facilities personnel, this energy audit has identified several energy-saving measures.The measures will reduce the amount of fuel burned and electricity used at the site.The projects will not degrade the performance of the building and,in some cases,will improve it. Several types of EEMs can be implemented immediately by building staff,and others will require various amounts of lead time for engineering and equipment acquisition.In some cases,there are logical advantages to implementing EEMs concurrently.For example,if the same electrical contractor is used to install both lighting equipment and motors,implementation of these measures should be scheduled to occur simultaneously. Aloske Energy Efficiency Revolving Lean Fund The Alaska Housing Finance Corporation (AHFC)Alaska Energy Efficiency Revolving Loan Fund (AEERLF)is a State of Alaska program enacted by the Alaska Sustainable Energy Act (Senate Bill 220,A.S.18.56.855,"Energy Efficiency Revolving Loan Fund”).The AEERLF will provide loans for energy efficiency retrofits to public facilities via the Retrofit Energy Assessment for Loan System (REAL).As defined in 15 AAC 155.605,the program may finance energy efficiency improvements to buildings owned by: a.Regional educational attendance areas; b.Municipal governments,including political subdivisions for municipal governments; c.The University of Alaska; d.Political subdivisions of the State of Alaska,or e.The State of Alaska Refer to the Retrofit Energy Assessment for Loans manual which can be obtained from AHFC for more information on this program. AkWarm ID No.BBNC-ILI-CAEC-02 PAGE 20 OF 20 CENTRAL ALASKA ENGINEERING COMPANY :TANALIAN SCHOOL K-12 ENERGY AUDIT REPORT Appendix A Benchmark Reports APPENDIXA REAL Preliminary Benchmark Data Form PART |FACILITY INFORMATION Facility Owner Facility Owned By Date Lake &Peninsula School Dist |Regional Education Attendance 06/12/12 Building Name/Identifier Building Usage Building Square Footage Tanalian School!Education -K -12 9,730 Building Type Community Population Year Built Wood Frame 118 1983 Facility Address Facility City Facility Zip 100 School Rd Tanalian 99653 Contact Person First Name Last Name Middle Name_[Email Phone Tim McDermott tmedermott@Ipsd.com 246-4280 ext 318 Mailing Address City State Zip PO Box 498 King Salmon AK 99613 Primary Monday-Saturday Sunday Holidays Operating Friday Hours 7to5 0 0 0 Average #of Occupants 40 During Renovations /Notes Date Details 2005)Addition NOTE: Oil data provided for 2 years,and was divided in half. All utility data includes teacher housing and school building usage. 75.5%of utility data was allocated to school building,per LPSD estimates. PART Il -ENERGY SOURCES pay for the energy source. 1.Please check every energy source you use in the table below.If known,please enter the base rate you 2.Provide utilities bills for the most recent two-year period for each energy source you use. Heating Oil Electricity Natural Gas Propane Wood Coal S /gallon S/kWh S /CCF S/gal S/cord $/ton Other energy sources? Tanalian K-12 Buiding Size Input (sf)=9,730 2009 Natural Gas Consumption (Therms) 2009 Natural Gas Cost ($) 2009 Electric Consumption (kWh) 2009 Electric Cost ($) 2009 Oi]Consumption (Therms) 2009 Oil Cost ($) 2009 Propane Consumption (Therms) 2009 Propane Cost ($) 2009 Coal Consumption (Therms) 2009 Coal Cost ($) 2009 Wood Consumption (Therms) 2009 Wood Cost ($) 2009 Therma!Consumption (Therms) 2009 Thermal Cost ($) 2009 Steam Consumption (Therms) 2009 Steam Cost ($) 2009 Total Energy Use (kBtu) 2009 Total Energy Cost ($) Annual Energy Use Intensity (EUI) 2009 Natural Gas (kBtu/sf) 2009 Electricity (kBtu/sf) 2009 Oil (kBtu/sf) 2009 Propane (kBtu/sf) 2009 Coal (kBtu/sf) 2009 Wood (kBtu/sf) 2009 Thermal (kBtu/sf) 2009 Steam (kBtu/sf) 2009 Energy Utilization Index (kBtu/sf) Annual Energy Cost Index (ECI) 2009 Natural Gas Cost Index ($/sf) 2009 Electric Cost Index ($/sf) 2009 Oil Cost Index ($/sf) 2009 Propane Cost Index ($/sf) 2009 Coal Cost Index ($/sf) 2009 Wood Cost Index ($/sf) 2009 Thermal Cost Index ($/sf) 2009 Steam Cost Index ($/sf) 2009 Energy Cost Index ($/sf) 0.00 0 53,216 37,389 5,135.80 21,720 0.00 0.00 0.00 0.00 0.00 0.00 2,433.33 0.00 0.00 0.00 938,541 59,109 0.0 18.7 52.8 0.0 0.0 0.0 25.0 0.0 96.5 0.00 3.84 2.23 0.00 0.00 0.00 0.00 0.00 6.07 2010 Natural Gas Consumption (Therms) 2010 Natural Gas Cost ($) 2010 Electric Consumption (kWh) 2010 Electric Cost ($) 2010 Oil Consumption (Therms) 2010 Oil Cost ($) 2010 Propane Consumption (Therms) 2010 Propane Cost ($) 2010 Coal Consumption (Therms) 2010 Coal Cost ($) 2010 Wood Consumption (Therms) 2010 Wood Cost ($) 2010 Thermal Consumption (Therms) 2010 Thermal Cost ($) 2010 Steam Consumption (Therms) 2010 Steam Cost ($) 2010 Total Energy Use (kBtu) 2010 Total Energy Cost ($) Annual Energy Use Intensity (EUI) 2010 Natural Gas (kBtu/sf) 2010 Electricity (kBtu/sf) 2010 Oil (kBtu/sf) 2010 Propane (kBtu/sf) 2010 Coal (kBtu/sf) 2010 Wood (kBtu/sf) 2010 Thermal (kBtu/sf) 2010 Steam (kBtu/sf) 2010 Energy Utilization Index (kBtu/sf) Annual Energy Cost Index (EC) 2010 Natural Gas Cost Index ($/sf) 2010 Electric Cost Index ($/sf) 2010 Oil Cost Index ($/sf) 2010 Propane Cost Index ($/sf) 2010 Coal Cost Index ($/sf) 2010 Wood Cost Index ($/sf) 2010 Thermal Cost Index ($/sf) 2010 Steam Cost Index ($/sf) 2010 Energy Cost Index ($/sf) Note: 4 kWh =3,413 Btu's 4 Therm =100,000 Btu's 41 CF =1,000 Btu's 0.00 0 59,525 37,509 5,135.80 21,720 0.00 0 0.00 0 0.00 0 2,433.33 0 0.00 0 960,072 59,229 0.0 20.9 52.8 0.0 0.0 0.0 25.0 0.0 98.7 0.00 3.85 2.23 0.00 0.00 0.00 0.00 0.00 6.09 Tanalian K-12 Electricity Btus/kWh =3,413 Provider Customer #Month Start Date End Date Billing Days Consumption (kWh)Consumption {Therms)|Demand Use Electric Cost ($)Unit Cost ($/kWh)|Demand Cost ($) NEA Jul-08 7/1/2008 7/31/2008 31 1932 66 $1,360 0.70 NEA Aug-08 8/1/2008 8/31/2008 31 4186 143 $2,940 0.70 NEA Sep-08 9/1/2008 9/30/2008 30 4702 160 $3,301 0.70 NEA Oct-08 10/1/2008 10/31/2008 31 5190 177 $3,644 0.70 NEA Nov-08 11/1/2008 11/30/2008 30 $638 192 $3,959 0.70 NEA Dec-08 12/1/2008 12/31/2008 31 5613 192 $4,191 0.75 NEA Jan-09 1/1/2009 1/31/2009 31 6205 212 $4,633 0.75 NEA Feb-09 2/1/2009 2/28/2009 28 6039 206 $4,095 0.68 NEA Mar-09 3/1/2009 3/31/2009 31 6821 233 $4,625 0.68 NEA Apr-09 4/1/2009 4/30/2009 30 4491 153 $3,045 0.68 NEA May-09 5/1/2009 5/31/2009 31 2321 79 $1,481 0.64 NEA Jun-09 6/1/2003 6/30/2009 79 3 $116 1.46 a aaa diitetaden|poisaS Be +eens ee NEA Jul-09 7/1/2009 7/31/2009 31 1127 38 $721 NEA Aug-09 8/1/2009 8/31/2009 31 3370 115 $2,150 NEA Sep-09 9/1/2009 9/30/2009 30 $218 178 $3,257 NEA Oct-09 10/1/2009 10/31/2009 31 5740 196 $3,582 NEA Nov-09 11/1/2009 11/30/2009 30 6536 223 $4,079 NEA Dec-09 12/1/2009 12/31/2009 31 6267 214 $3,911 NEA jan-10 1/1/2030 1/31/2010 31 $4,375 NEA Feb-10 2/1/2010 2/28/2010 28 $3,984 NEA Mar-10 3/1/2010 3/31/2010 31 $4,143 NEA Apr-10 4/1/2010 4/30/2010 30 $3,920 NEA May-10 5/1/2010 5/31/2010 31 $2,368 NEA Jun-10 6/1/2010 6/31/2010 31 $1,019 ES 'Jul -08 to Jun -09 total:|=$37,389 "o" Jul «09 to Jun +10 total:bQ Sse sie!$37,509 oe a] bere re ert $0-: feciok Jul 08 to Jun 09 avg:|!-.$0.70 - jul -09 to Jun +10 avg?!|$0.63 ElectricConsumption(kWh)$4,000 +$3,500 |$3,000 +$2,500 $2,000 $1,500 $1,000 $s00 Date (Mon -Yr) $0 ElectricCost($)am Electric Consumption (kWh) --Electric Cost ($) Tanalian K-12 Oil Btus/Gal =132,000 Provider Customer #Month Start Date End Date Billing Days Consumption (Gal)Consumption (Therms)|Demand Use Oil Cost ($)Unit Cost ($/Therm}|Demand Cost ($) Jan-09 1/1/2009 1/31/2009 31 3,891 5,136 $21,720 4.23 Feb-09 2/1/2009 2/28/2009 31 0 0 $o 0.00 Mar-09 3/1/2009 3/31/2009 30 0 0 $o 0.00 Apr-09 4/1/2009 4/30/2009 31 0 0 $0 0.00 May-09 5/1/2009 5/31/2009 30 0 0 $0 0.00 Jun-09 6/1/2009 6/30/2009 31 0 0 $0 0.00 Jul-09 7/1/2009 7/31/2009 31 0 0 $0 0.00 Aug-09 8/1/2009 8/31/2009 28 0 i)$0 0.00 Sep-09 9/1/2009 9/30/2009 31 0 it)$0 0.00 Oct-09 10/1/2009 10/31/2009 30 0 0 so 0.00 Nov-09 11/1/2009 11/30/2009 31 0 0 $o 0.00 Dec-09 12/1/2009 12/31/2009 30 0 0 $o 0.00 paste m R Ra apes ren Jan-10 1/1/2010 1/31/2010 31 3,891 $,136 $21,720 Feb-10 2/1/2010 2/28/2010 31 ie]0 so Mar-10 3/1/2010 3/31/2010 30 0 0 $0 Apr-10 4/1/2010 4/30/2010 31 [¢]0 $o May-10 5/1/2010 5/31/2010 30 Q 0 $0 Jun-10 6/1/2010 6/30/2010 31 0 ig so Jul-10 7/1/2010 7/34/2010 31 0 ij $o Aug-10 8/1/2010 8/31/2010 28 0 (J $o Sep-10 9/1/2010 9/30/2010 31 ij i¢j $0 Oct-10 10/1/2010 10/31/2010 30 0 iy so Nov-10 11/1/2010 11/30/2010 31 it]ij $o Dec-10 12/1/2010 12/31/2010 30 $o :Jul -08 to Jun-09 total:|":rr Se Jul -09 to jun -10 total:$21,720 -.."., pote Jal +08 to Jun -09 ave: -Jul -09 to Jun-10 avg: OilConsumption(Therms)Tanalian K-12 -Oil Consumption (Therms)vs.Oil Cost ($) 6,000 $25,000.00 §,000 + +$20,000.00 4,000 t $15,000.00 a @ae Oil Consumption (Therms) 33,000 +-2 -Oil Cost ($} ° +$10,000.00 2,000 +|+$5,000.00 1,000 +||o +=:r 7 $0.00 Fe F FY YO PF PF HF PS P P HO YF SF KF YF KF HK PPS SY SYFF&wr FY Se TK ST KC KKK KF we KK KT KF wo Date (Mon -Yr) Tanalian K-12 Thermal Btu/Btu =1 Provider Customer #Month Start Date End Date Billing Days Consumption (BTU)Consumption (Therms}|Demand Use Thermal Cost ($)Unit Cost ($/Therm)|Demand Cost {$} Jan-09 30000000 300 $0 Feb-09 26666667 267 $o Mar-09 21666667 217 $o Apr-09 18333333 183 so May-09 15000000 150 $o Jun-09 210000000 100 $a jul-09 10000000 100 $o Aug-09 15000000 150 $o Sep-09 18333333 183 $o Oct-09 21666667 217 so Nov-09 26666667 267 $o Dec-09 30000000 300 $0 Jan-10 30000000 300 Feb-10 26666667 267 Mar-10 21666667 217 Apr-10 18333333 183 May-10 15000000 150 Jun-10 10000000 100 Jul-10 10000000 100 Aug-10 15000000 150 Sep-10 18333333 183 Oct-10 21666667 217 Nov-10 26666667 267 Dec-10 30000000 300 Jan -09 to Dec-09 total:|'""-243/333,333.33 -2,433.33" Jan -10 to Dec -.10 total:-243,333,333.33 ii boxe 2433.33 =Jan -09 to Dec-09 avg: dan =10 to Dec-10 avg:|. ThermalConsumption(Therms}350 Tanalian K-12 -Thermal Consumption (Therms)vs Coal Cost ($) Date (Mon-Yr) $1 ThermalCost($)fam Thermal Consumption (Therms) -Thermal Cost ($) CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL K-12 ENERGY AUDIT REPORT Appendix B Short AK-Warm Report APPENDIX 8 Energn.ey Audit =Energy Analysis and Cost comparison he*AkWarm Commercial Audit Software ye toupee ERGY AUDIT REPORT--PROJECT SUMMARY-Created 6/30/2012 11:31 AM|Oren Project Information PROJECT INFORMATION AUDITOR INFORMATION Building:Tanalian K-12 Auditor Company:Central Alaska Engineering Co. Address:100 Schoo!Road Auditor Name:Jerry P.Herring,PE,CEA City:Tanalian Client Name:Tim McDermott Auditor Address:32215 Lakefront Dr Soldotna,AK 99669 Client Address:P.O.Box 498 Auditor Phone:(907)260-5311 King Salmon,AK 99613 Auditor FAX:()- Client Phone:(907)246-4280 Client FAX:()- Auditor Comment: Design Data Building Area:9,730 square feet Design Heating Load:Design Loss at Space:240,015 Btu/hour with Distribution Losses:250,016 Btu/hour Plant Input Rating assuming 82.0%Plant Efficiency and 25%Safety Margin:381,121 Btu/hour Note:Additional Capacity should be added for DHW load, if served. Typical Occupancy:40 people Design Indoor Temperature:70 deg F (building average) Actual City:Tanalian Design Outdoor Temperature:-19.5 deg F Weather/Fuel City:Port Alsworth Heating Degree Days:11,206 deg F-days ility Information Electric Utility:Self Generated Power (oil)-Residential Natural Gas Provider:None Average Annual Cost/kWh:$0.670/kWh Average Annual Cost/ccf:$0.000/ccf Annual Energy Cost Estimate Other . a:: sas Space Space Water kas Refrige ..Clothes |Ventilatio |Service .TotDescriptionHeatingCoolingHeatingLighting"ration Fleet Cooking Drying n Fans Fees otal Cost Existing $28,784 So $8,052 $13,290 $1,876 $563 $0 so $7,840 0)$60,405 Building With $25,231 So $6,744 $6,211 $1,876 $563 $0 $0 $7,840 SO $48,465 Proposed Retrofits SAVINGS $3,553 $0 $1,308 $7,079 $0 $0 $0 $0 $0 $0 $11,940 t=Energy Analysis and ¢Cost Comparison §BT a A eh te Sip ad afee)Tanalian K-12."AkWarm CommercialAuditSoftware ®2%A ied shgienietias asians oie Ta LeeseSOE UAN pore ge etre Annual Energy Costs by End Use $80,000 ME Ventilation and Fans MIME Space Heating HB Refrigeration $60,000 5 Other Electrical EE Lighting HJ Domestic Hot Water $40,000- $20,000+ $0-Existing Retrofit Annual Energy Costs by Fuel $80,000 $60,000 $40,000 J $20,000| $0°Existing Retrofit HEM Hot Wir District Ht Es #2 Oil MB Electricity Annual Space Heating Cost by Component LP a NRPS lt yl Teg RE Face a stl Pe womans eg Pras BN!Air Ceiling 4 Window5 Wall/Door+ Floor disiniiadh -$5,000 $0 $5,000 $10,000 $15,000 $20,000 MMMM Existing Gila Retrofit it Energy Analysis and Cost Comparison te ots?)'aha HAets Tanalian K-12.oo"akWarm |(or mercial AAudit Softwarere Meow ayeReial -peaae |PRIORITY LIST -RECOMMENDED ENERGY EFFICIENCY MEASURES nk |Feature Recommendation Annual Energy Installed SIR Payback Savings Cost (Years) 1 On-or Below-Grade |Install R-30 Fiberglass $421 $2,186 4.56 5.2 Floor,Perimeter:Batts on the Perimeter 4 House feet of the Crawl Space Floor. 2 HVAC And DHW Place DHW circ pump on $426 $2,500 4.63 5.9 timer [$2500]+$100 Maint. Savings 3 Lighting -Combined |Replace with 14 FLUOR (2)$756 $4,800 1.85 6.3 Retrofit:2 bulb TS TS 45.2"FS54W/TS HO Standard StdElectronic and Add new Occupancy Sensor,Manual Dimmer 4 Below-(part or all)Add R-19 fiberglass batts $714 $9,997 1.69 14 Grade Wall:to masonry wall.Cost Crawlspace does not include studs or firring strips. 5 Setback Thermostat:|Implement a Heating $1,047 $9,690 1.47 9.3 2nd Floor Temperature Unoccupied Setback to 60.0 deg F for the 2nd Floor space. °Lighting -Combined Replace with 89 FLUOR (2)$3,811 $42,000 1.45 11 Retrofit:2 bulb T12 T8 4'F32T8 25W Energy-+§1,335 Maint. Saver Program Savings HighEfficElectronic and Add new Occupancy Sensor 7 Setback Thermostat:|Implement a Heating $1,457 $15,690 1.26 10.8 Gym Temperature Unoccupied Setback to 60.0 deg F for the Gym space. 8 Lighting -Combined Replace with 7 LED 25W $1,006 $16,000 1.26 15.9 Retrofit:HPS Module StdElectronic and +$700 Maint. Add new Occupancy Savings Sensor 9 Setback Thermostat:|!mplementa Heating $797 $9,690 1.12 12.2 1st Floor Temperature Unoccupied Setback to 60.0 deg F for the 1st Floor space. 10 Lighting -Combined |Replace with 70 FLUOR (2)$1,506 $33,600 0.90 22.3 Retrofit:2 bulb T8 T8 4'F32T8 25W Energy-+$1,050 Maint. Saver Program Savings HighEfficElectronic and Add new Occupancy Sensor EnergyAudit=Energy Analysis and Cost ee eeeAkWarmCommercialAuditSoftware% |PRIORITY LIST -RECOMMENDED ENERGY EFFICIENCY MEASURES ik |Feature Recommendation Annual Energy Installed SIR Payback Savings Cost (Years) TOTAL $11,940 $146,153 1.39 12.2 +$3,185 Maint. Savings ENERGY AUDIT REPORT-ENERGY EFFICIENT RECOMMENDATIONS1.Building Envelope Insulation Rank |Location Existing Type/R-Valuve Recommendation Type/R-Installed Annual Value Cost Energy Savings 1 On-or Below-Insulation for 0'to 2'Install R-30 Fiberglass Batts $2,186 $421 Grade Floor,Perimeter:None on the Perimeter 4 feet of Perimeter:House {Insulation for 2'to 4'the Crawl Space Floor. Perimeter:None Modeled R-Value:14.6 4 Below-(part or all)|Wall Type:All Weather Wood Add R-19 fiberglass batts to $9,997 $714 Grade Wall:Insul.Sheathing:None masonry wall.Cost does Crawlspace Framed Wall:2 x 6,24"on not include studs or firring center strips. EPS Type|-psi 10,2 inches Modeled R-Value:12.1 Exterior Doors -Replacement Rank |Location Size/Type/Condition Recommendation Installed Annual Cost Energy Savings Windows and Glass Doors -Replacement Rank |Location Size/Type/Condition Recommendation Installed Annual Cost Energy Savings Air Leakage Rank |Location Estimated Air Leakage Recommended Air Leakage |Installed Annual Target Cost Energy Savings 2.Mechanical Equipment Mechanical Rank |Recommendation Installed Annual Cost Energy Savings Energy AiAudit Energy Analysis andCost Comparison.ah"AkWarm Commercial Audit Software = 12 Place DHW circ pump on timer [$2500]$2,500 $426 +5100 Maint Savings Setback Thermostat Rank |Location Size/Type/Condition Recommendation Installed Annual Cost Energy Savings 5 2nd Floor Existing Unoccupied Heating Implement a Heating $9,690 $1,047 Setpoint:70.0 deg F Temperature Unoccupied Setback to 60.0 deg F for the 2nd Floor space. 7 Gym Existing Unoccupied Heating Implement a Heating $15,690 $1,457 Setpoint:70.0 deg F Temperature Unoccupied Setback to 60.0 deg F for the Gym space. 9 1st Floor Existing Unoccupied Heating Implement a Heating $9,690 $797 Setpoint:70.0 deg F Temperature Unoccupied Setback to 60.0 deg F for the 1st Floor space. Ventilation Rank |Recommendation Cost Annual Energy Savings 3.Appliances and Lighting Lighting Fixtures and Controls Rank |Location Existing Recommended Installed Annual Cost Energy Savings 3 2 bulb TS 14 FLUOR (2)TS 45.2"FS4W/TS |Replace with 14 FLUOR (2)$4,800 $756 HO Standard StdElectronic with |TS 45.2"F54W/TS HO Manual Switching Standard StdElectronic and Add new Occupancy Sensor,Manual Dimmer 6 2 bulb T12 89 FLUOR (2)T12 4'F40T12 Replace with 89 FLUOR (2)$42,000 $3,811 34W Energy-Saver Magnetic T8 4'F32T8 25W Energy-+$1,335 with Manual Switching Saver Program Maint. HighEfficElectronic and Add Savings new Occupancy Sensor 8 HPS 7 HPS 70 Watt Magnetic with Replace with 7 LED 25W $16,000 $1,006 Manual Switching Module StdElectronic and +$700 Add new Occupancy Sensor Maint. Savings 10 2 bulb T8 70 FLUOR (2)T8 4'F32T8 32W_|Replace with 70 FLUOR (2)$33,600 $1,506 Standard Instant StdElectronic |T8 4'F32T8 25W Energy-+$1,050 with Manual Switching Saver Program Maint. HighEfficElectronic and Add Savings new Occupancy Sensor Energy AtAudit=Energy Analysis and Costpadi eatesat"akWarm Commercial Audit Software L_ frigeration 1k |Location Existing Recommended Installed Annual Cost Energy Savings Other Electrical Equipment Rank |Location Existing Recommended Installed Annual Cost Energy Savings Cooking/Clothes Drying Rank |Recommended Installed Annual Cost Energy Savings AkWarmCalc Ver 2.2.0.3,Energy Lib 5/18/2012 CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL K-12 ENERGY AUDIT REPORT Appendix C Major Equipment List APPENDIX C CENTRAL Al *""”*""'GINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT _MAJOR EQUIPMENT INVENTORY ASHRAE ESTIMATED TAG LOCATION FUNCTION MAKE MODEL TYPE CAPACITY EFFICIENCY MOTOR SIZE SERVICE REMAINING NOTES LIFE USEFUL LIFE B-1 BOILER RM BUILDING HEAT BURNHAM V-904A OIUCAST IRON 4.2 GPH OIL 82.1%:35 32 B-2 BOILER RM BUILDING HEAT WEIL-MCLAIN V-904A OIUCAST IRON 4.2 GPH OIL 82.1%-35 32 WH-4 MECH RM DHW SUPPLY AMTROL WHSMZCDW |INDIRECT STORAGE 50 GALLONS 80.0%-24 17 CPA BOILER RM BUILDING HEAT GRUNDFOS UPS 50-160 F INLINE EST 125 GPM EST 82%|950-1300 W 10 7 CP-2 BOILER RM BUILDING HEAT GRUNDFOS UPS 50-160 F INLINE EST 125 GPM EST 82%|950-1300 W 10 7 cP-3 BOILER RM WASTE HEAT GRUNDFOS UP 50-75 F INLINE 20GPM @ 16 EST 82%0.17 HP 10 7 CP-4 BOILER RM WASTE HEAT GRUNDFOS UP 50-75 F INLINE 20 GPM @ 16°EST 82%0.17 HP 10 7 EF-1 MECH RM RA GREENHECK SFB-22-20 CENTRIFUGAL EST 5,000 CFM EST 82%|EST2.5HP 25 18 RETURN AIR FROM SCHOOL EF-2 MECH RM EA GREENHECK NIA CENTRIFUGAL EST 1000 CFM EST 82%0.5 HP 25 18 LABELED EXAIR 1 EF-3 MECH RM EA WESTINGHOUSE 316P 347 CENTRIFUGAL EST 300 CFM EST 82%0.17 HP 25 18 EF-4 KITCHEN EA GREENHECK N/A AXIAL EST 900 CFM EST 82%|ESTOSCFM|25 18 AHU-1 MECH RM SA GREENHECK NIA CENTRIFUGAL EST 10,000 CFM 87.5%5 HP 25 18 APPENDIX C CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT Appendix D Site Visit Photos APPENDIX D CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT 2.View of the side of the school showing where the classrooms.View of the main entrance of the school._aAobenontoS our cet :wm i eee . w of the back of the school.the gym. ees "ees 3.Vie APPENDIX D CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT =. 6.View ofthe classroom lighting 7.View of the bathroom lighting.8.View of exterior light fixture. APPENDIX D CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT KW:oy2M12.Heated water circulation pumps.11.Close-up ofboiler 1. APPENDIX D CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT 13.Domestic hot water maker.14.Heat exchanger removing waste heat from village generators.aieEOEa15.Crawlspace,showing heated water supply lines.16.Overall view of the fan room. APPENDIX D CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT RO Seto oro elytq' 2 03/24us 18.Kitchen range hood.17.School return air fan. : ge 4 : Pe 1 9.View of exit sign in the school. APPENDIX D CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT Appendix E Thermal Site Visit Photos APPENDIX E CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT sien vy orb <a weea»ee wel 4 3 1.Overall view of the main entrance of the school. APPENDIX E CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT F aay he ther Ly | - 2.South side of the school.Heat loss exhibited from the wall. APPENDIX E CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT 3.South side of the school.Expected heat loss exhibited from below grade wall. APPENDIX E CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT * © i ba By eg re ae "& ey,Sing BE 4ce4 "fe ahsSle 4.East side of the school.Heat loss exhibited from the (A)doorway (B)below grade wall. APPENDIX E CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT easteerer2ae5.East side of the school.Heat loss due to open door. APPENDIX E CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT ence aweYeeepanningenceToe co ibited from the doorway.Northwest corner of the school.Heat loss exh6. APPENDIX E CENTRAL ALASKA ENGINEERING COMPANY TANALIAN SCHOOL ENERGY AUDIT REPORT Appendix F Waste Heat Recovery Meter APPENDIX F Appendix F Waste Heat:Add instrumentation per schematic below,to measure the amount of waste heat being utilized by the subject building.This information will complete the picture regarding energy input to the building and inform owner/management decisions regarding capital and energy related improvements. Outside Inside building Temperature sensor Flow meter measuring glycol flow rate Tin From power plant .Supply glycol =a nH #8 ED pply gly To power plant Return glycol Temperature sensor Measuring Tout Amount of waste heat (BTU/hr)=flow rate (gallons/minute)x (Tin-Tout)x 450 e Temperature is in degrees F Shenitech ultrasonic flowmeter (or equivalent)can be used to determine temperatures and flow rate,data sheet attached as Appendix H. 46 Appendix F |STUF-300R1B Advanced Clamp-on Transit-time Technologies Gre) SHENITECH Ultrasonic Thermal Energy Meter Features: siubavop 4} le ahr a | f Thermal " IsolationReturnx The STUF-300R1B ultrasonic thermal energy meter provides abundant capabilities for accurate thermal energy measurement of a liquid-based thermal energy production /transferring system.It is the 3rd generation energy meter from Shenitech.Compared with its predecessors,the 3rd generation offers betterperformanceandaricherfeatureset,all at a lower price. The STUF-300R1B system is consisted of the high e Energy rate and total consumption measurement e Non-intrusive clamp-on technology. Easy and economical installation e No moving parts to worn out.Long-life span. Maintenance-free e High accuracy e Wide flow measurement range,bi-directional e Built-in totalizers,batch controllers and etc. e Isolated RS-485 interface.Supports the MODBUS e Abundant input/output,such as 4-20mA output, relay output,pulse output,alarm output,etc. e Suitable for pipes from 0.5”to 240” e Optional wireless capability e Optional remote data collection/billing software e Large data logger for recording multiple variables e Easy to use and set up.Self-explanatory menu-driven programming e NEMA 4X (IP65)weather-resistant enclosure e Suitable for virtually any liquid heating/cooling systems such as HVAC,office buildings,apartment complexes,condominiums,solar heating systems and geothermal systems temperature of the supply flow and the return flow.The energy consumption rate is then calculated based on the temperature difference and the measured flowrate.A built-in energy totalizer is used to add up the amount of energy delivered. STUF-300R1B provides versatile input/output interfaces, such as isolated digital outputs,relay output,batch control,alarm,4-20mA output.In addition,the built-in performance ultrasonic flowmeter STUF-300F1B and a pair of standard PT100 temperature sensors.The ultrasonic flowmeter is based on our cutting-edge clamp-on flow measurement technology,which is capable of measuring the flow ftom outside of a pipe accurately and reliably.Due to the non-intrusive nature of this technology,there is no pipe cutting,no moving parts,no pressure drop,no leaks and no risk of contamination.In addition,the installation is simple and requires no special skills or tools. The two PT100 sensors,which can be either insertion type or surface-mounting type,are used to measure the isolated RS-485 port with surge protection and MODBUS support makes remote energy monitoring and energy meter networking easy and reliable. With optional wireless module and Shenitech's data collectiorvbilling software,STUF-300F1B can be used to manage energy production/consumption systems remotely and automatically. STUF-300R1B is an ideal choice for improving HVAC, energy production and building energy efficiency in terms of heating,cooling ventilation and air-conditioning. Repeatability Better than 0.2% |Accuracy For flow measurement:+1%of reading,plus +0.006m/s (+0.02ft/s)in velocity Response Time 0.5s.Configurable between 0.5s and 99s Velocity -16 +16m/s (-52 +52 ft/s),bi-directional LCD with backlight.2 x 20 letters.4 x 4 tactile-feedback membrane keypad. _.|Display/Keypad Displays instantaneous energy rate,total energy (positive,negative and net),temperatures, flow rate,time,analog inputs,etc. Units English (U.S.)or metric Current output:4-20mA isolated output for energy rate,flowrate,velocity or sound speed. Impedance 0-1k.Accuracy 0.1% oe OCT output:isolated Open Collector Transistor output.Up to 0.5A load '='|Signal Outputs Relay output:[A@125VAC or 2A@30VDCiCanbeprogrammedaspulsesignalforenergy/flow totalization;ON/OFF signal for relay "a:drive or alarm drive;batch controlSs. es,Sound alarm T d RTD interface:two temperature channels that can accommodate two PT100 3-wirereganietemperaturesensorsforthermalenergymeasurement. _._|other Analog inputs Analog input:one channel of 4-20mA input.Can be used for temperature,pressure and level :|Recordin Automatically records the totalizer data of the last 128 days /64 months /5years ".Tans Optional SD data logger (2GB space)or external USB data logger a er Isolated RS-485 with power surge protection.Supports the MODBUS protocol :Communication T™.vas . ©)Interk StufManager ”PC software for real-time data acquisition (optional)a nierlace Optional wireless module (GPRS/GSM/RF)for remote monitoring (STUF-300RnB only) mS Protection Class:IP65 (NEMA 4X)weather-resistant.Additional protection enclosure (large :*|Enclosure polycarbonate enclosure)available upon request (STUF-300R2B model only). yo Dimension:230mm x 150mm x 75mm (9”x 5.9”x 3”) .»|Liquid Types Virtually all commonly used liquids (full pipe) Qe 3.Liquid Temp -40°C 100°C or -40°C 155°C,depending on transducer type a Susp ension <20,000ppm,or,<2%,particle size smaller than 100um.-8)concentration «|Pipe Size DN15 DN6,000mm (0.5"240"),depending on transducer type 3 |Pipe Material All metals,most plastics,fiber glass,etc.Allow pipe liner. fa"|Straight Pipe Longer than 15D,where D is pipe diameter.If a pump or a valve is nearby upstream,the +f Section straight pipe section following the pump should be >25D. 3 |Shielded transducer cable.Standard length 15'(5m).Can be extended to 1640'(500m).|Contact the manufacturer for longer cable requirement. teh Main unit:-10°C 70°C (14°F 158°F) 'g.Temperature Ultrasonic Transducer:-40°C 100°C (-40°F 212°F)for standard version '&--40°C 155°C (-40°F 312°F)for higher temperature version D PT100 temperature sensor:-40°F 312°F (-40°C 155°C) a Humidity Main unit:85%RH ||a Ultrasonic Transducer:water-immersible,water depth less than 10'3m) :5 DC:12 24VDC,or,AC:90 260VAC f&|Power consumption:<1.5W at 12VDC WeightMain unit:2 kg (4 lbs)for standard version,2.5 kg (5 Ibs)for network version The STUF-300R1B thermal energy measurement system is an ideal choice for a wide range of applications in HVAC; energy production,energy transfer,building management,university facility management,district heating and cooling, geothermal or solar-thermal system monitoring,and all other liquid-based thermal energy production/transferring. Some examples are: Chilled water sub-metering Hot water sub-metering Condenser water Glycol Thermal storage Geothermal system Solar hot-water system Lake source cooling Chemical feed,ammonia feed Energy meter network Power plants "TyansdiceriOptions: Type HFx:Special transducer for small size pipes DN15 DN25mm (0.5”1”) Temperature range -20°C 60°C (0°F 140°F) x represents pipe material:0-Copper;1-Tubing;2-ANSI Plastic; 3-ANSI Metal Type Slx:Standard-S1 transducer (magnetic)for pipes DN25 DN100mm (1”4”) Temperature range -40°C 80°C (-40°F 175°F) x represents pipe material.Same as above Type SIHTx:High-temp S1 transducer for small size pipes DN25 DN100mm (1”4”) Temperature range -40°C 155°C (-40°F 312°F) x represents pipe material.Same as above Type MI:Standard-M1 transducer (magnetic)for medium size pipes DN50 DN700mm (2”28”) Temperature range -40°C 80°C (-40°F 175°F) Type M1HT:High-temp M1 transducer for medium size pipes DNS50 DN700mm (2”28”) Temperature range -40°C 155°C (-40°F 312°F) Type LI:Standard-L1 transducer for large size pipes DN300 DN6,000mm (11”240”) Temperature range -40°C 80°C (-40°F 175°F) PT100SM:surface-mount temperature sensor,3-wire PT100 Thermal isolation around the sensor is recommended in order to get a temperature reading close to the liquid temperature PTIOOIN:Insertion type temperature sensor,3-wire PT100 Users may use their own RTD temperature sensor :lodel SelCONESpheStsY=Model Selection:#35 teto'SeeweteeemeweeweeweeeeeeeeeeoOeewwwweeweeeeeeeeeeeoOweweewwewwwewewemeeweeeeeeeeeoObeeennewnnnneeeeeeeeannnnnnnnnnnneneneeeennne----fF]Example: Model#STUF-300R1B-M1-PT100SM-A-DN100-MS5-AO-DLSD stands for standard main unit,Ml-type clamp-on transducer and PT100 surface-mount sensor for pipe size DN100mm,1m lead for temperature sensor and 5 meter cable for flow transducer,with 4-20mA output and SD data logger. Note:If you prefer to work with the English system for the model number,please put "IN”(for inch)or "F”(for foot) right before the dimension values.For example,the above model#in the English system will be: STUF-300R1B-M1-PT100SM-A-IN4-F15-AO-DLSD. ®SHENITECH,LLC 10-214 Tower Office Park,Woburn,MA 01801,USA Tel.+1 781-932-0900,+1 888-738-0188 (Toll-free) Fax +1 978 418 9170 SHENITECH|sales@shenitech.com,www.shenitech.com ©2007 Copyright Shenitech.All rights reserved.