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CIRI-ENA-CAEC KPB Kenai North Peninsula Pool 2012-EE
ENERGY AUDIT REPORT Kenai Peninsula Borough Pool 55176 Poolside Kenai, AK 99611 CAEC Project No. CIRI‐ENA‐CAEC‐09 May 2012 SUBMITTED BY: PRIMARY CONTACT: 22010 SE 51st Street 32266 Lakefront Drive Issaquah, WA 98029 Soldotna, Alaska 99669 Phone (425)281‐4706 Fax (425)507‐4350 Phone (907) 260‐5311 Fax (907) 260‐5312 Email: andrew.waymire@siemens.com Email: akengineer@starband.net CONTACT: Andrew Waymire, C.E.M. CONTACT: Jerry P. Herring, P.E., C.E.A. REPORT DISCLAIMER Privacy The information contained within this report, including any attachment(s), was produced under contract to Alaska Housing Finance Corporation (AHFC). IGAs 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. Limitations of Study This energy audit is intended to identify and recommend potential areas of energy savings, estimate the value of the savings, and provide an opinion of the costs to implement the recommendations. This audit meets the criteria of a Level 2 Investment Grade Audit (IGA) per the American Society of Heating, Refrigeration, Air-conditioning Engineers (ASHRAE) and the Association of Energy Engineers (AEE), and is valid for one year. The life of the IGA may be extended on a case-by-case basis, at the discretion of AHFC. In preparing this report, the preparers acted with the standard of care prevalent in this region for this type of work. All results are dependent on the quality of input data provided. Not all data could be verified and no destructive testing or investigations were undertaken. Some data may have been incomplete. This report is not intended to be a final design document. 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 upgrades should undergo a thorough lighting analysis to assure that the upgrades will comply with State of Alaska Statutes as well as Illuminating Engineering Society (IES) recommendations. All liabilities for upgrades, including but not limited to safety, design, and performance are incumbent upon the professional(s) who prepare the design. Siemens Industry, Inc (SII) and Central Alaska Engineering Company (CAEC) bear no responsibility for work performed as a result of this report. Financial ratios may vary from those forecasted due to the uncertainty of the final installed design, configuration, equipment selected, installation costs, related additional work, or the operating schedules and maintenance provided by the owner. Furthermore, many ECMs are interactive, so implementation of one ECM may impact the performance of another ECM. SII and CAEC accept no liability for financial loss due to ECMs that fail to meet the forecasted financial ratios. The economic analyses for the ECMs relating to lighting improvements are based solely on energy savings. Additional benefits may be realized in reduced maintenance cost, deferred maintenance, and improved lighting quality. The new generation lighting systems have significantly longer life leading to long term labor savings, especially in high areas like Gyms and exterior parking lots. Lighting upgrades displace re-lamping costs for any fixtures whose lamps would otherwise be nearing the end of their lifecycle. This reduces maintenance costs for 3-10 years after the upgrade. An overall improvement in lighting quality, quantified by numerous studies, improves the performance of students and workers in the built environment. New lighting systems can be designed to address all of the above benefits. Table of Contents REPORT DISCLAIMER.....................................................................................................................................2 1. EXECUTIVE SUMMARY..............................................................................................................................5 2. AUDIT AND ANALYSIS BACKGROUND.......................................................................................................8 3. North Peninsula Recreation Center........................................................................................................11 4. ENERGY COST SAVING MEASURES..........................................................................................................21 Appendix A – Major Equipment List ...........................................................................................................28 Appendix B – Lighting Inventory.................................................................................................................31 Appendix C – Utility Data............................................................................................................................32 Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 5 of 38 1. EXECUTIVE SUMMARY This report was prepared for the Kenai Peninsula Borough using ARRA funds as part of a contract for: Kenai Peninsula Borough Alaska Housing Finance Corporation Contact: Kevin Lyon Contact: Rebekah Luhrs 47140 East Poppy Lane P.O. Box 10120 Soldotna, Alaska 99669 Anchorage, Alaska 99510 Phone (907) 262‐9657 Phone (907)330‐8141 Email: klyon@borough.kenai.ak.us Email: rluhrs@ahfc.us The scope of the audit focused on North Peninsula Recreation Center. The scope of this report is a comprehensive energy study, which included an analysis of building shell, interior and exterior lighting systems, HVAC systems, and plug loads. Based on electricity and fuel oil prices in effect at the time of the audit, the annual predicted energy costs for the buildings analyzed are as follows: $71,630 for Electricity $65,859 for Natural Gas The total energy costs are $137,490 per year. Table 1.1 below summarizes the energy efficiency measures analyzed for the North Peninsula Recreation Center. Listed are the estimates of the annual savings, installed costs, and two different financial measures of investment return. Table 1.1 PRIORITY LIST – ENERGY EFFICIENCY MEASURES Rank Feature Improvement Description Annual Energy Savings Installed Cost Savings to Investment Ratio, SIR1 Simple Payback (Years)2 1 Lighting: Hallway Replace with 6 FLUOR CFL, Reflector 26W PAR38 $136 $164 5.27 1.2 2 Lighting: Exterior Replace with 3 200W Induction $723 $2,909 4.78 4.0 3 Lighting: Exterior Replace with 7 40W Induction $521 $3,804 2.64 7.3 4 Lighting: Exterior Replace with 40W Induction $39 $543 1.37 14.1 5 HVAC And DHW Add HW reset to Boilers 1 & 2. Repair duct work on AHU-1. $704 $11,000 1.03 15.6 Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 6 of 38 Table 1.1 PRIORITY LIST – ENERGY EFFICIENCY MEASURES Rank Feature Improvement Description Annual Energy Savings Installed Cost Savings to Investment Ratio, SIR1 Simple Payback (Years)2 TOTAL, cost-effective measures $2,124 $18,421 2.00 8.7 The following measures were not found to be cost-effective: 6 Lighting: Women's Locker Add new Occupancy Sensor $122 $2,000 0.73 16.5 7 Lighting: Men's Locker Add new Occupancy Sensor $105 $2,000 0.63 19.1 TOTAL, all measures $2,350 $22,421 1.77 9.5 Table Notes: 1 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. 2 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 $2,350 per year, or 1.7% of the buildings’ total energy costs. These measures are estimated to cost $22,421, for an overall simple payback period of 9.5 years. If only the cost‐effective measures are implemented, the annual utility cost can be reduced by $2,124 per year, or 1.5% of the buildings’ total energy costs. These measures are estimated to cost $18,421, for an overall simple payback period of 8.7 years. Table 1.2 below 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. Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 7 of 38 Table 1.2 Annual Energy Cost Estimate Description Space Heating Space Cooling Water Heating Lighting Refrigera tion Other Electrical Cooking Clothes Drying Ventilatio n Fans Service Fees Total Cost Existing Building $121,2 70 $0 $2,172 $10,93 5 $0 $0 $0 $0 $0 $3,113 $137,490 With All Proposed Retrofits $120,7 45 $0 $2,172 $9,110 $0 $0 $0 $0 $0 $3,113 $135,140 SAVINGS $525 $0 $0 $1,825 $0 $0 $0 $0 $0 $0 $2,350 Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 8 of 38 2. AUDIT AND ANALYSIS BACKGROUND 2.1 Program Description This audit included services to identify, develop, and evaluate energy efficiency measures at the North Peninsula Recreation Center. The scope of this project included evaluating building shell, lighting and other electrical systems, and HVAC equipment, motors and pumps. Measures were analyzed based on life‐cycle‐cost techniques, which include the initial cost of the equipment, life of the equipment, annual energy cost, annual maintenance cost, and a discount rate of 3.0%/year in excess of general inflation. 2.2 Audit Description Preliminary audit information was gathered in preparation for the site survey. The site survey provides critical information in deciphering where energy is used and what opportunities exist within a building. The entire site was surveyed to inventory the following to gain an understanding of how each building operates: • Building envelope (roof, windows, etc.) • Heating, ventilation, and air conditioning equipment (HVAC) • Lighting systems and controls • Building‐specific equipment • Water consumption, treatment (optional) & disposal The building site visit was performed to survey all major building components and systems. The site visit included detailed inspection of energy consuming components. Summary of building occupancy schedules, operating and maintenance practices, and energy management programs provided by the building manager were collected along with the system and components to determine a more accurate impact on energy consumption. Details collected from North Peninsula Recreation Center enable a model of the building’s energy usage to be developed, highlighting the building’s total energy consumption, energy consumption by specific building component, and equivalent energy cost. The analysis involves distinguishing the different fuels used on site, and analyzing their consumption in different activity areas of the building. North Peninsula Recreation Center is classified as being made up of the following activity areas: 1) Public Pool and Fitness Center: 35,460 square feet Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 9 of 38 In addition, the methodology involves taking into account a wide range of factors specific to the building. These factors are used in the construction of the model of energy used. The factors include: • Occupancy hours • Local climate conditions • Prices paid for energy 2.3. Method of Analysis Data collected was processed using AkWarm© Energy Use Software to estimate energy savings for each of the proposed energy efficiency measures (EEMs). The recommendations focus on the building envelope; HVAC; lighting, plug load, and other electrical improvements; and motor and pump systems 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. Our 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 as projected by the Department of Energy are included. 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 $12,000 and results in a savings of $1,000 in the first year, the payback time is 12 years. If the boiler has an expected life to replacement of 10 years, it would not be financially viable to make the investment since the payback period of 12 years is greater 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. Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 10 of 38 Measures are implemented in order of cost‐effectiveness. The program first calculates individual SIRs, and ranks all measures by SIR, higher SIRs at the top of the list. An individual measure must have an individual SIR>=1 to make the cut. Next the building is modified and re‐ simulated with the highest ranked measure included. Now all remaining measures are re‐ evaluated and ranked, and the next most cost‐effective measure is implemented. AkWarm goes through this iterative process until all appropriate measures have been evaluated and installed. It is important to note that the savings for each recommendation is calculated based on implementing the most cost effective measure first, and then cycling through the list to find the next most cost effective measure. 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 a reduced operating schedule for inefficient lighting will result in relatively high savings. Implementing a reduced operating schedule for newly installed efficient lighting will result in lower relative savings, because the efficient lighting system uses less energy during each hour of operation. If multiple EEM’s are recommended to be implemented, AkWarm calculates the combined savings appropriately. Cost savings are calculated based on estimated initial costs for each measure. Installation costs include labor and equipment to estimate the full up‐front investment required to implement a change. Costs are derived from Means Cost Data, industry publications, and local contractors and equipment suppliers. 2.4 Limitations of Study All results are dependent on the quality of input data provided, and can only act as an approximation. In some instances, several methods may achieve the identified savings. This report is not intended as a final design document. The design professional or other persons following the recommendations shall accept responsibility and liability for the results. Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 11 of 38 3. North Peninsula Recreation Center (Photo From Google Maps) 3.1. Building Description The 35,460 square foot North Peninsula Recreation Center was constructed in 1993, with a normal occupancy of 30 people. The number of hours of operation for this building average 11 hours per day, considering all seven days of the week. The North Peninsula Recreation Area is a multipurpose recreation building located north of Kenai, AK. Its facilities include a swimming pool with water slide, fitness center with racquetball courts, classrooms and offices. Description of Building Shell The exterior walls on the main portion of the building consist of a strapped CMU wall with 2” rigid insulation and 4” exterior insulation finishing system. The swimming pool area is enclosed in a steel beam geodesic style dome with translucent paneling and spray on insulation The Roof of the main building is comprised of 1.5x8x16 concrete surface pavers, 2” mortar‐face insulation board, 4” rigid insulation, and EPDM membrane. Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 12 of 38 The Floor/Foundation of the building is constructed slab concrete. Typical windows throughout the building are typically aluminum frames with double pane glass. Doors are full glass at the main entrance and metal on most side entrances. Description of Heating and Cooling Plants The Heating Plants used in the building are: Original Boiler Nameplate Information: Weil McLain H‐888WS Fuel Type: Natural Gas Input Rating: 2 x 2,396 BTU/hr Steady State Efficiency: 75 % Idle Loss: 5 % Heat Distribution Type: Water Boiler Operation: All Year Notes: Serves AHUs, main building radiant heat, and DHW Addition Boilers Nameplate Information: Bryan CL‐120WP‐FD Fuel Type: Natural Gas Input Rating: 1,200 BTU/hr Steady State Efficiency: 80 % Idle Loss: 5 % Heat Distribution Type: Water Boiler Operation: All Year Notes: Serves Pool and Spa Heating DHW Heater Fuel Type: Natural Gas Input Rating: 1,360 BTU/hr Steady State Efficiency: 87 % Idle Loss: 5 % Heat Distribution Type: Water Boiler Operation: All Year. Heated by Boilers 1 & 2 Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 13 of 38 Space Heating and Cooling Distribution Systems Hot water from Boilers 1&2 is distributed to the three (3) air handling units in the building. The air handling unit in the pool area delivers constant volume air and is controlled via time clock. AHU‐2 and AHU‐3 serve the office area, locker rooms and fitness room addition. Radiant heating exists in the main building and locker rooms. The building is controlled by a Siemens APOGEE control system with pneumatic actuation. Domestic Hot Water System Domestic hot water for the locker room and bathrooms is supplied by an Ace Buehler 1,360 MBH Heat Exchanger that is located within a 480 gallon DHW storage tank. Heat is supplied by Boilers 1 and 2. Pool and hot spa water is heated by two (2) separate heat exchangers that receive heat from the Boiler 3. Boiler 3 is dedicated to heating pool and spa water. The pool is kept at ~85⁰F and the spa is kept at 104⁰F. A variety of pumps circulate water throughout the pool and are listed in the Appendix. Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 14 of 38 Waste Heat Recovery Information No waste heat recovery existed at the time of the audit but staff reported that a reclaim heat exchanger will be installed to preheat AHU‐1? Description of Building Ventilation System The existing building ventilation is served by the three (3) air handling units that bring in outside air. Exhaust fans in locker rooms mechanical rooms also exhaust air. Lighting Lighting primarily consists of 32 watt, T8 linear fluorescent lamps. Fixtures with T5 lamps were installed in the fitness center and racquetball court additions. Lighting in the pool area had has been retrofitted from 400 watt metal halide lamps to 100 watt Maxlite fluorescent fixtures. Exterior lighting consists of metal halide and high pressure sodium lamps of various wattages. Plug Loads Plug loads in the office area consist of computers, printers and fax machines. Various exercise equipment in the fitness center contribute to additional plug loads. Major Equipment The equipment list, available in Appendix A, is composed of major energy consuming equipment which through energy conservation measures could yield substantial energy savings. The list shows the major equipment in the building and pertinent information utilized in energy savings calculations. Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 15 of 38 3.2 Predicted Energy Use 3.2.1 Energy Usage / Tariffs The electric usage profile charts (below) represents the predicted electrical usage for the building. If actual electricity usage records were available, the model used to predict usage was calibrated to approximately match actual usage. The electric utility measures consumption in kilowatt‐hours (kWh) and maximum demand in kilowatts (kW). One kWh usage is equivalent to 1,000 watts running for one hour. One KW of electric demand is equivalent to 1,000 watts running at a particular moment. The basic usage charges are shown as generation service and delivery charges along with several non‐utility generation charges. The natural gas usage profile shows the predicted natural gas energy usage for the building. If actual gas usage records were available, the model used to predict usage was calibrated to approximately match actual usage. Natural gas is sold to the customer in units of 100 cubic feet (CCF), which contains approximately 100,000 BTUs of energy. The propane usage profile shows the propane usage for the building. Propane is sold by the gallon or by the pound, and its energy value is approximately 91,800 BTUs per gallon. The fuel oil usage profile shows the fuel oil usage for the building. Fuel oil consumption is measured in gallons. One gallon of #1 Fuel Oil provides approximately 132,000 BTUs of energy. The following is a list of the utility companies providing energy to the building and the class of service provided: Electricity: Homer Electric Assn (Homer) ‐ Commercial ‐ Lg Natural Gas: Enstar Natural Gas ‐ Commercial ‐ Lg The average cost for each type of fuel used in this building is shown below in Table 3.1. This figure includes all surcharges, subsidies, and utility customer charges: Table 3.1 – Average Energy Cost Description Average Energy Cost Electricity $ 0.1311/kWh Natural Gas $ 0.70/ccf 3.2.1.1 Total Energy Use and Cost Breakdown At current rates, Kenai Peninsula Borough pays approximately $137,490 annually for electricity and other fuel costs for the North Peninsula Recreation Center. Figure 3.1 below reflects the estimated distribution of costs across the primary end uses of energy based on the AkWarm© computer simulation. Comparing the “Retrofit” bar in the Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 16 of 38 figure to the “Existing” bar shows the potential savings from implementing all of the energy efficiency measures shown in this report. Figure 3.1 Annual Energy Costs by End Use Figure 3.2 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. Figure 3.2 Annual Energy Costs by Fuel Type Figure 3.3 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. Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 17 of 38 Figure 3.3 Annual Space Heating Cost by Component $0 $20,000 $40,000 $60,000 $80,000 $100,000 Floor Wall/Door Window Ceiling Air Existing Retrofit Annual Space Heating Cost by Component The tables below show AkWarm’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. Note, in the tables below “DHW” refers to Domestic Hot Water heating. Electrical Consumption (kWh) Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec Lighting 7260 6616 7260 7026 7260 7026 7260 7260 7026 7260 7026 7260 Ventilation_Fans 0 0 0 0 0 0 0 0 0 0 0 0 DHW 402 366 402 389 402 389 402 402 389 402 389 402 Space_Heating 38700 35267 38700 37452 38700 37452 38700 38700 37452 38700 37452 38700 Space_Cooling 0 0 0 0 0 0 0 0 0 0 0 0 Natural Gas Consumption (ccf) Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec DHW 193 176 193 187 193 187 193 193 187 193 187 193 Space_Heating 10865 9234 9519 7629 6523 5182 4711 4781 5580 7666 9009 10696 Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 18 of 38 3.2.2 Energy Use Index (EUI) Energy Use 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, 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 3.4 for details): Building Site EUI = (Electric Usage in kBtu + Gas Usage in kBtu + similar for other fuels) Building Square Footage Building Source EUI = (Electric Usage in kBtu X SS Ratio + Gas Usage in kBtu X SS Ratio + similar for other fuels) Building Square Footage where “SS Ratio” is the Source Energy to Site Energy ratio for the particular fuel. Table 3.4 North Peninsula Recreation Center EUI Calculations Energy Type Building Fuel Use per Year Site Energy Use per Year, kBTU Source/Site Ratio Source Energy Use per Year, kBTU Electricity 546,256 kWh 1,864,370 3.340 6,226,997 Natural Gas 93,669 ccf 9,366,904 1.047 9,807,149 Total 11,231,274 16,034,146 BUILDING AREA 35,460 Square Feet BUILDING SITE EUI 317 kBTU/Ft²/Yr BUILDING SOURCE EUI 452 kBTU/Ft²/Yr * Site ‐ Source Ratio data is provided by the Energy Star Performance Rating Methodology for Incorporating Source Energy Use document issued March 2011. Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 19 of 38 3.3 AkWarm© Building Simulation 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, the North Peninsula Recreation Center was modeled using AkWarm© energy use software to establish a baseline space heating and cooling energy usage. Climate data from Kenai 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. Equipment cost estimate calculations are provided in Appendix D. Limitations of AkWarm© Models • The model is based on typical mean year weather data for Soldotna. This data represents the average ambient weather profile as observed over approximately 30 years. As such, the gas 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. Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 20 of 38 Figure 3.4 Difference in Weather Data • 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. • The model 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 in Section 3.1 were derived from the output generated by the AkWarm© simulations. Soldotna, AK Weather Data -20 -10 0 10 20 30 40 50 60 70 80 5/17/2009 7/6/2009 8/25/2009 10/14/2009 12/3/2009 1/22/2010 3/13/2010 5/2/2010 6/21/2010 8/10/2010 DateDry Bulb Temperature (F)Actual Dry Bulb (F)TMY3 Dry Bulb (F) Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 21 of 38 4. ENERGY COST SAVING MEASURES 4.1 Summary of Results The energy saving measures are summarized in Table 4.1. Please refer to the individual measure descriptions later in this report for more detail. Calculations and cost estimates for analyzed measures are provided in Appendix C. Table 4.1 North Peninsula Recreation Center, Kenai, Alaska PRIORITY LIST – ENERGY EFFICIENCY MEASURES Rank Feature Improvement Description Annual Energy Savings Installed Cost Savings to Investment Ratio, SIR Simple Payback (Years) 1 Lighting: Hallway Replace with 6 FLUOR CFL, Reflector 26W PAR38 $136 $164 5.27 1.2 2 Lighting: Exterior Replace with 3 200W Induction $723 $2,909 4.78 4.0 3 Lighting: Exterior Replace with 7 40W Induction $521 $3,804 2.64 7.3 4 Lighting: Exterior Replace with 40W Induction $39 $543 1.37 14.1 5 HVAC And DHW Add HW reset to Boilers 1 & 2. Repair duct work on AHU-1. $704 $11,000 1.03 15.6 TOTAL, cost-effective measures $2,124 $18,421 2.00 8.7 The following measures were not found to be cost-effective: 6 Lighting: Women's Locker Add new Occupancy Sensor $122 $2,000 0.73 16.5 7 Lighting: Men's Locker Add new Occupancy Sensor $105 $2,000 0.63 19.1 TOTAL, all measures $2,350 $22,421 1.77 9.5 4.2 Interactive Effects of Projects The savings for a particular measure are calculated assuming all recommended EEMs coming before that measure in the list are implemented. If some EEMs are not implemented, savings for the remaining EEMs will be affected. For example, if ceiling insulation is not added, then savings from a project to replace the heating system will be increased, because the heating system for the building supplies a larger load. In general, all projects are evaluated sequentially so energy savings associated with one EEM would not also be attributed to another EEM. By modeling the recommended project sequentially, the analysis accounts for interactive affects among the EEMs and does not “double count” savings. Interior lighting, plug loads, facility equipment, and occupants generate heat within the building. When the building is in cooling mode, these items contribute to the overall cooling demands of the building; therefore, lighting efficiency improvements will reduce cooling requirements in air‐conditioned buildings. Conversely, lighting‐efficiency improvements are anticipated to slightly increase heating requirements. Heating penalties and cooling benefits were included in the lighting project analysis. Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 22 of 38 4.3 Building Shell Measures No building shell improvements are recommended at this time. Primarily Envelope Measures such as windows, doors, weather stripping, and insulation are only considered cost effective if there is a visible deficiency which is noted during the audit. However it is recommended that any time the facility replaces doors or windows that it uses a replacement with a high efficiency rating. Also when renovating or constructing additions to the facility a energy cost analysis should be taken when determining if a material with a greater R‐value should be used instead of that of the code requirements. Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 23 of 38 4.4 Mechanical Equipment Measures 4.4.1 Heating/Cooling/Domestic Hot Water Measure Observations – Existing Boiler Operations During low load times (warm winter weather) the boiler cycles on and off often to maintain water supply temperature setpoint. The boilers have a purge cycle prior to firing that reduces the overall efficiency of the system. In colder temperatures the boiler stays on longer minimizing purge losses. Recommendations Siemens recommends applying hot water reset technology to mitigate energy consumption. The water temperature required to heat a building varies with outdoor temperature. In very cold weather, the heating water temperature needs to be hot. As the outdoor temperature increases, the heating water temperature can be reduced. Most building operators do not manually adjust their temperature controls to maximize system efficiency. Hot water reset is one of many strategies available in an Energy Management System. Periodic evaluation of the system from an energy management perspective maintains the system functionality and ensures that the building systems do not have energy management functions disabled. Resetting hot water supply temperature to match the anticipated heating load can result in considerable energy savings, increased boiler efficiency, and greater occupant comfort. Observations – AHU-1 During walkthroughs, it was noted that AHU‐1 has some ductwork sections have begun to show signs of aging. Some ducts had holes where screws were missing and some duct connections had cracks Recommendations These sections should be fixed and sealed appropriately. Rank Recommendation 5 Add HW reset to Boilers 1 & 2. Repair duct work on AHU‐1. Installation Cost $11,000 Estimated Life of Measure (yrs)20 Energy Savings (/yr) $704 Breakeven Cost $11,308 Savings‐to‐Investment Ratio 1.0 Simple Payback yrs 16 Auditors Notes: Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 24 of 38 Observations – Heat Reclaim Because the pool and spa are maintained at relatively high temperatures, the pool area is likely candidate for reclaiming heat for either air or pool water heating purposes. Because pool staff reported that a heat reclaim project will soon be initiated, no further heat reclaim strategies are recommended at this time. 4.4.2 Ventilation System Measures (There were no improvements in this category) 4.4.3 Night Setback Thermostat Measures (There were no improvements in this category) Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 25 of 38 4.5 Electrical & Appliance Measures 4.5.1 Lighting Measures The goal of this section is to present any lighting energy conservation measures that may also 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. 4.5.1a Lighting Measures – Replace Existing Fixtures/Bulbs The building uses mostly modern linear T8 lighting fixtures. However, the lighting in some areas that vary in occupancy throughout the day, such as the locker rooms, have their lights left on throughout the day. Exterior building and parking lot lighting consist of metals halide fixtures of varying wattages. Recommendations Siemens recommends installing motion/occupancy sensors to turn the lights on and off based on the use of the space. The sensors could be mounted on the ceiling so that the entire room is sensed. The sensing device would be a dual technology infrared and ultrasonic device. This will sense both noise and motion. Siemens also recommends replacing the existing exterior metal halide fixtures with more energy efficient and longer lasting induction lighting fixtures. Rank Location Existing Condition Recommendation 7 Men's Locker 19 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic with Manual Switching Add new Occupancy Sensor Installation Cost $2,000 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $105 Breakeven Cost $1,269 Savings‐to‐Investment Ratio 0.6 Simple Payback yrs 19 Auditors Notes: Estimate 4 sensors needed $500/sensor Rank Location Existing Condition Recommendation 6 Women's Locker 22 FLUOR (2) T8 4' F32T8 32W Standard Instant StdElectronic with Manual Switching Add new Occupancy Sensor Installation Cost $2,000 Estimated Life of Measure (yrs)15 Energy Savings (/yr) $122 Breakeven Cost $1,469 Savings‐to‐Investment Ratio 0.7 Simple Payback yrs 16 Auditors Notes: Estimated: 4 Sensors needed ~$500/sensor Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 26 of 38 4.5.1b Lighting Measures – Lighting Controls (There were no improvements in this category) 4.5.2 Refrigeration Measures (There were no improvements in this category) Rank Location Existing Condition Recommendation 4 Exterior MH 70 Watt StdElectronic Replace with 40W Induction Installation Cost $543 Estimated Life of Measure (yrs)27 Energy Savings (/yr) $39 Breakeven Cost $744 Savings‐to‐Investment Ratio 1.4 Simple Payback yrs 14 Auditors Notes: $543.43/fix Rank Location Existing Condition Recommendation 3 Exterior 7 HPS 100 Watt StdElectronic Replace with 7 40W Induction Installation Cost $3,804 Estimated Life of Measure (yrs)27 Energy Savings (/yr) $521 Breakeven Cost $10,030 Savings‐to‐Investment Ratio 2.6 Simple Payback yrs 7 Auditors Notes: $543.43/Fix Rank Location Existing Condition Recommendation 2 Exterior 3 MH 400 Watt StdElectronic Replace with 3 200W Induction Installation Cost $2,909 Estimated Life of Measure (yrs)27 Energy Savings (/yr) $723 Breakeven Cost $13,917 Savings‐to‐Investment Ratio 4.8 Simple Payback yrs 4 Auditors Notes: $969.80/fix Rank Location Existing Condition Recommendation 1 Hallway 6 MH 70 Watt StdElectronic with Manual Switching Replace with 6 FLUOR CFL, Reflector 26W PAR38 Installation Cost $164 Estimated Life of Measure (yrs)7 Energy Savings (/yr) $136 Breakeven Cost $864 Savings‐to‐Investment Ratio 5.3 Simple Payback yrs 1 Auditors Notes: $27.30/fix Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 27 of 38 4.5.3 Other Electrical Measures (There were no improvements in this category) 4.5.4 Cooking Measures (There were no improvements in this category) 4.5.5 Clothes Drying Measures (There were no improvements in this category) Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 28 of 38 Appendix A – Major Equipment List Boilers Boilers Make Model MBH in MBH out Burner Serves Boiler-1 Weil-McLain H-888WS 2,396 1,904 2HP, Hi/Lo Fire AHU-1 & Pool Water Boiler-2 Weil-McLain H-888WS 2,396 1,904 2HP, Hi/Lo Fire AHU-1 & Pool Water Boiler-3 Bryan Flex Tube CL-120WP- FD 1,200 960 1/2HP, Hi Fire Only Office, AHU-2, AHU-3 AHUs Serves HP %Eff CFM MBH Hours Operation Notes AHU-1 Pool Area 20 93% 25,500 1,435 24/7 Rip/Leak in fan duct work RF-1 Pool Area 20 86% 25,500 Winter: 7A-9P AHU-2 Offices & Locker Rooms 7.5 91% 6,915 272 RF-2 Offices & Locker Rooms 3 88% 4,520 AHU-3 Fitness Center 3 4,700* 175* Only runs in morning warm up. Will cycle on stat during day. *Estimate Heating Pumps TAG Serves HP GPM Notes CP-6 HX-1, HX-2 1.5 75 HWS/HWR connection to boilers CP-4,5 Natatorium 2 110 alternate - only one run at a time CP-1,2 Admin Base Board 1.5 55 alternate - only one run at a time CP-3 DHW 0.5 77 24/7 HP-2 AHU-2 0.5 HP-3 AHU-3 0.5 Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 29 of 38 Exhaust Fans TAG Serves Size CFM EF-1 Locker Room 3/4 HP 2,100 EF-2 Laundry 105w 140 EF-3 Janitor 21w 60 EF-4 Chem Room 50w 80 EF-5 Chlorine Room 296w 1,050 EF-6 Mech Room 1/4 HP 900 Radiant Heating Coils TAG Serves MBH CFM Supply RHC-1 Admin Offices 30 1390 AHU-2 RHC-2 Admin Offices 43 2995 AHU-2 RHC-3 Admin Offices 9 420 AHU-2 RHC-4 Admin Offices 9 420 AHU-2 RHC-5 Admin Offices 2 150 AHU-2 RHC-6 Admin Offices 13 605 AHU-2 RHC-7 Admin Offices 4 195 AHU-2 RHC-8 Admin Offices 6 780 AHU-2 Unitary Heaters TAG Serves MBH GPM UH-1 Mech Room 62 4.8 UH-2 Storage 19 2 UH-3 Mech Room 32 3.7 CHU-1 Vestibule 9 1 CHU-2 Toilet 138 4 1 FT-1 Locker Room 42 4.4 FT-2 Offices 49 4 Domestic Hot Water Make Model Size Capacity Ajax Tank VG4205-K-4.1248.W 480 Gal Ace Buehler HX TC412042W 1,360 GPM 1360 MBH DHW Pump 300/540/810 W Natatorium Related Pumps Pool Related Tag HP % Eff GPM 'Raindrop' pump PE-9 5 180 Spa booster pump PE-17 5 180 Air Pump for Jacuzzi PE-1 2 100 Chlorinator PE-4 0.75 Spa Filter Pump PE-16 2 100 Pool Filter Pump PE-5 15 92 600 Slide Pump PE-10 15 800 Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 30 of 38 Natatorium Heat Exchangers Heat Exchangers Serves MBH Shell GPM Tube GPM HX-1 Pool 960 65.8 42.5 HX-2 Spa 62 4.3 5 Ultraviolet Disinfection Ultraviolet Disinfection Make Model Unit-1 Hanovia PMD200D1/W Unit-2 Hanovia PMD152B1/W Miscellaneous Pumps Misc. Pumps Serves HP GPM % Eff Notes WP-1 Well Pump 7.5 80 max 87.50%8-10hr/day PMP-1 Sump Pump 0.33 Runs 24/7 Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 31 of 38 Appendix B – Lighting Inventory 100 W CFL 100W HPS 13 W CFL 1x4x1 T8 1x4x2 T8 2 x 18W Quad 2x2x2U T8 2x4x2 T8 2x4x3 T8 2x4x4 T5 2x4x4 T8 2x4x6 T5 400W MH 70W MH Grand Total Classroom 8 8 Exterior 7 3 1 11 Fitness Center 6 6 Hallways 4 19 5 3 6 37 Offices 12 4 4 4 5 29 Pool Area/Locker Rooms 60 6 12 53 5 2 7 145 Restrooms 6 4 10 Racquetball 16 16 Storage 42 1 43 Grand Total 60 7 6 12 113 17 25 16 14 6 3 16 3 7 305 Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 32 of 38 Appendix C – Utility Data First Name Last Name Middle Name Phone Kevin Lyon 907‐262‐9657 State Zip AK 99669 Monday‐ Friday Saturday Sunday Holidays 8:00 ‐ 8:00 8:00 ‐ 8:00 10:00 ‐ 5:00 Average # of Occupants During 150 180 180 Renovations / Notes Date PART II – ENERGY SOURCES Heating Oil Electricity Natural Gas Propane Wood Coal $ /gallon $ / kWh $ / CCF $ / gal $ / cord $ / ton xx Other energy sources? 2. Provide utilities bills for the most recent two‐year period for each energy source you use. Details 1. Please check every energy source you use in the table below. If known, please enter the base rate you pay for the energy source. Contact Person Email klyon@borough.kenai.ak.us Mailing Address City 47140 East Poppy Lane Soldotna Primary Operating Hours Facility Address Facility City Facility Zip 55176 Poolside Nikiski 99635 Building Type Community Population Year Built Steel 4,327 1980 Building Name/ Identifier Building Usage Building Square Footage Nikiski Swimming Pool Recreation 35,460 Kenai Peninsula Borough Municipal 04/04/11 REAL Preliminary Benchmark Data Form PART I – FACILITY INFORMATION Facility Owner Facility Owned By Date Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 33 of 38 Nikiski Swimming Pool Buiding Size Input (sf) =35,460 2009 Natural Gas Consumption (Therms)91,395 2009 Natural Gas Cost ($)94,242 2009 Electric Consumption (kWh)698,880 2009 Electric Cost ($)125,973 2009 Oil 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 Thermal Consumption (Therms) 2009 Thermal Cost ($) 2009 Steam Consumption (Therms) 2009 Steam Cost ($) 2009 Total Energy Use (kBtu)11,524,777 2009 Total Energy Cost ($)220,215 Annual Energy Use Intensity (EUI) 2009 Natural Gas (kBtu/sf) 257.7 2009 Electricity (kBtu/sf)67.3 2009 Oil (kBtu/sf) 2009 Propane (kBtu/sf) 2009 Coal (kBtu/sf) 2009 Wood (kBtu/sf) 2009 Thermal (kBtu/sf) 2009 Steam (kBtu/sf) 2009 Energy Utilization Index (kBtu/sf)325.0 Annual Energy Cost Index (ECI) 2009 Natural Gas Cost Index ($/sf)2.66 2009 Electric Cost Index ($/sf)3.55 2009 Oil Cost Index ($/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)6.21 Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 34 of 38 2010 Natural Gas Consumption (Therms)96,184 2010 Natural Gas Cost ($)81,091 2010 Electric Consumption (kWh)591,520 2010 Electric Cost ($)90,022 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)11,637,258 2010 Total Energy Cost ($)171,113 Annual Energy Use Intensity (EUI) 2010 Natural Gas (kBtu/sf)271.2 2010 Electricity (kBtu/sf)56.9 2010 Oil (kBtu/sf) 2010 Propane (kBtu/sf) 2010 Coal (kBtu/sf) 2010 Wood (kBtu/sf) 2010 Thermal (kBtu/sf) 2010 Steam (kBtu/sf) 2010 Energy Utilization Index (kBtu/sf)328.2 Annual Energy Cost Index (ECI) 2010 Natural Gas Cost Index ($/sf)2.29 2010 Electric Cost Index ($/sf)2.54 2010 Oil Cost Index ($/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 ($/sf) 20010 Energy Cost Index ($/sf)4.83 Note: 1 kWh = 3,413 Btu's 1 Therm = 100,000 Btu's 1 CF ≈ 1,000 Btu's Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 35 of 38 Nikiski Swimming PoolNatural GasBtus/CCF =100,000Provider Customer #Month Start Date End Date Billing Days Consumption (CCF) Consumption (Therms) Demand Use Natural Gas Cost ($) Unit Cost ($/Therm) Demand Cost ($)Enstar NGC 151016Jan‐09 12/7/08 1/5/09 29 9,309 9,309 $9,457 $1.02Enstar NGC 151016Feb‐09 1/6/09 2/5/09 30 9,622 9,622 $9,793 $1.02Enstar NGC 151016Mar‐09 2/6/09 3/5/09 32 8,651 8,651 $8,735 $1.01Enstar NGC 151016Apr‐09 3/6/09 4/2/09 29 7,796 7,796 $7,879 $1.01Enstar NGC 151016May‐09 4/3/09 5/7/09 29 7,214 7,214 $7,295 $1.01Enstar NGC 151016Jun‐09 5/8/09 6/4/09 34 6,422 6,422 $7,938 $1.24Enstar NGC 151016Jul‐096/5/09 7/9/09297,170 7,170 $7,316$1.02Enstar NGC 151016Aug‐09 7/10/09 8/6/09 34 6,373 6,373 $6,457 $1.01Enstar NGC 151016Sep‐09 8/7/09 9/4/09 27 5,748 5,748 $5,830 $1.01Enstar NGC 151016Oct‐09 9/5/09 10/8/09 31 7,398 7,398 $7,538 $1.02Enstar NGC 151016Nov‐09 10/9/09 11/5/09 31 7,281 7,281 $7,436 $1.02Enstar NGC 151016Dec‐09 11/6/09 12/3/09 30 8,411 8,411 $8,568 $1.02Enstar NGC151016 Jan‐10 12/4/09 1/7/10 33 9,603 9,603 $8,009 $0.83Enstar NGC 151016Feb‐10 1/8/10 2/4/10 28 8,490 8,490 $7,088 $0.83Enstar NGC151016 Mar‐10 2/5/10 3/4/10 30 8,460 8,460 $7,064 $0.83Enstar NGC 151016Apr‐10 3/5/10 4/8/10 27 7,801 7,801 $6,580 $0.84Enstar NGC151016 May‐10 4/9/10 5/6/10 35 9,576 9,576 $8,063 $0.84Enstar NGC 151016Jun‐10 5/7/10 6/3/10 28 7,186 7,186 $6,068 $0.84Enstar NGC151016 Jul‐10 6/4/10 7/8/10 35 8,405 8,405 $7,085 $0.84Enstar NGC 151016Aug‐10 7/9/10 8/5/10 29 7,124 7,124 $6,016 $0.84Enstar NGC151016 Sep‐10 8/6/10 9/2/10 28 7,031 7,031 $5,986 $0.85Enstar NGC 151016Oct‐10 9/3/10 10/7/10 33 7,426 7,426 $6,303 $0.85Enstar NGC151016 Nov‐10 10/8/10 11/4/10 31 8,329 8,329 $7,025 $0.84Enstar NGC 151016Dec‐10 11/5/10 12/2/10 27 6,753 6,753 $5,804 $0.86Jan ‐ 09 to Dec ‐ 09 total:91,395 91,395 0$94,242 $0Jan ‐ 10 to Dec ‐ 10 total:96,184 96,184 0$81,091 $0$1.03$0.84Jan ‐ 09 to Dec ‐ 09 avg:Jan ‐ 10 to Dec ‐ 10 avg: Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 36 of 38 Nikiski Swimming Pool ‐ Natural Gas Consumption (Therms) vs. Natural Gas Cost ($)02,0004,0006,0008,00010,00012,000Jan‐09Feb‐09Mar‐09Apr‐09May‐09Jun‐09Jul‐09Aug‐09Sep‐09Oct‐09Nov‐09Dec‐09Jan‐10Feb‐10Mar‐10Apr‐10May‐10Jun‐10Jul‐10Aug‐10Sep‐10Oct‐10Nov‐10Dec‐10Date (Mon ‐ Yr)Natural Gas Consumption (Therms)$0$2,000$4,000$6,000$8,000$10,000$12,000Natural Gas Cost ($)Natural Gas Consumption (Therms)Natural Gas Cost ($) Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 37 of 38 Nikiski Swimming PoolElectricityBtus/kWh =3,413Provider Customer #Month Start Date End Date Billing Days Consumption (kWh) Consumption (Therms) Demand Use Electric Cost ($) Unit Cost ($/kWh) Demand Cost ($)HEA 364324 Jan‐09 12/29/09 1/30/09 31 62,720 2,141 130 $13,454 $0.21 $929.00HEA 364324 Feb‐09 1/31/09 2/27/09 31 62,400 2,130 124 $13,308 $0.21 $885.00HEA 364324 Mar‐09 2/28/09 3/31/09 28 56,480 1,928 122 $12,205 $0.22 $874.00HEA 364324 Apr‐09 4/1/09 4/29/09 29 56,480 1,928 122 $9,977 $0.18 $875.00HEA 364324 May‐09 4/30/09 5/29/09 33 63,200 2,157 120 $10,917 $0.17 $864.00HEA 364324 Jun‐09 5/30/09 6/30/09 30 58,560 1,999 116 $10,193 $0.17 $834.00HEA 364324 Jul‐09 7/1/09 7/30/09 31 59,040 2,015 118 $10,423 $0.18 $832.00HEA 364324 Aug‐09 7/31/09 8/31/09 29 57,120 1,950 117 $10,127 $0.18 $824.00HEA 364324 Sep‐09 9/1/09 9/30/09 31 52,960 1,808 111 $9,435 $0.18 $781.00HEA 364324 Oct‐09 10/1/09 10/30/09 31 56,320 1,922 107 $8,604 $0.15 $765.00HEA 364324 Nov‐09 10/31/09 11/30/09 30 53,760 1,835 105 $8,268 $0.15 $754.00HEA 364324 Dec‐09 12/1/09 12/30/09 34 59,840 2,042 108 $9,062 $0.15 $777.00HEA 364324 Jan‐10 12/31/09 1/29/10 28 49,120 1,676 108 $6,865 $0.14 $776.00HEA 364324 Feb‐10 1/30/10 2/27/10 28 47,040 1,605 101 $6,541 $0.14 $723.00HEA 364324 Mar‐10 2/28/10 3/31/10 30 49,760 1,698 99 $6,797 $0.14 $708.00HEA 364324 Apr‐10 4/1/10 4/30/10 36 59,360 2,026 97 $9,102 $0.15 $740.00HEA 364324 May‐10 5/1/10 5/28/10 26 42,880 1,463 97 $7,020 $0.16 $736.00HEA 364324 Jun‐10 5/29/10 6/30/10 30 49,280 1,682 96 $7,811 $0.16 $729.00HEA 364324 Jul‐10 7/1/10 7/30/10 32 52,480 1,791 97 $8,317 $0.16 $740.00HEA 364324 Aug‐10 7/31/10 8/30/10 30 50,240 1,715 97 $8,019 $0.16 $734.00HEA 364324 Sep‐10 9/1/10 9/30/10 34 48,480 1,655 95 $7,763 $0.16 $718.00HEA 364324 Oct‐10 10/1/10 10/29/10 27 44,480 1,518 96 $6,911 $0.16 $740.00HEA 364324 Nov‐10 10/28/10 11/30/10 29 46,400 1,584 94 $7,107 $0.15 $724.00HEA 364324 Dec‐10 12/1/10 12/29/10 34 52,000 1,775 93 $7,769 $0.15 $723.00Jan ‐ 09 to Dec ‐ 09 total:698,880 23,853 1,400 $125,973 $9,994Jan ‐ 10 to Dec ‐ 10 total:591,520 20,189 1,170 $90,022 $8,791$0.18$0.15Jan ‐ 09 to Dec ‐ 09 avg:Jan ‐ 10 to Dec ‐ 10 avg: Siemens Industry, Inc. North Peninsula Pool Energy Audit Report AkWarm ID No. CIRI‐ENA‐CAEC‐09 Page 38 of 38 Nikiski Swimming Pool ‐ Electric Consumption (kWh) vs. Electric Cost ($)010,00020,00030,00040,00050,00060,00070,000Jan‐09Feb‐09Mar‐09Apr‐09May‐09Jun‐09Jul‐09Aug‐09Sep‐09Oct‐09Nov‐09Dec‐09Jan‐10Feb‐10Mar‐10Apr‐10May‐10Jun‐10Jul‐10Aug‐10Sep‐10Oct‐10Nov‐10Dec‐10Date (Mon ‐ Yr)Electric Consumption (kWh)$0$2,000$4,000$6,000$8,000$10,000$12,000$14,000$16,000Electric Cost ($)Electric Consumption (kWh)Electric Cost ($)