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Home My WebLink AboutAlakanuk Final Post Install Report 07-17-2012-VEEP EENNEERRGGYY AAUUDDIITT FFIINNAALL PPOOSSTT IINNSSTTAALLLLAATTIIOONN RREEPPOORRTT Results and Recommendations from Energy Audit of Alakanuk For EECBG and Whole Village Grants City of Alakanuk, Alaska July 17, 2012 Prepared By: Prepared For: Ameresco, Inc. 6643 Brayton Drive Anchorage, AK 99507 Alaska Energy Authority City of Alakanuk Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page i Alakanuk, AK TTAABBLLEE OOFF CCOONNTTEENNTTSS EXECUTIVE SUMMARY ............................................................................................................ 1 1.0 BUILDING DESCRIPTIONS ............................................................................................ 3 1.1 ALAKANUK WASHETERIA ........................................................................................ 3 1.2 ALAKANUK WATER TREATMENT PLANT ................................................................... 6 1.3 ALAKANUK SCHOOL ............................................................................................... 9 1.4 OTHER ALAKANUK BUILDINGS SURVEYED ............................................................. 12 2.0 UTILITIES ..................................................................................................................... 15 2.1 ELECTRICITY ....................................................................................................... 15 2.1.1 Electricity Usage Profiles ........................................................................16 2.2 FUEL ................................................................................................................... 19 3.0 OPERATIONS/MAINTENANCE PRACTICES ............................................................... 20 4.0 WHOLE VILLAGE AUDIT INITIATIVES - PROPOSED ................................................. 21 4.1 LIGHTING EXCHANGE PROGRAM ........................................................................... 21 5.0 ENERGY CONSERVATION OPPORTUNITIES ............................................................ 22 5.1 ECO DESCRIPTIONS - PROPOSED ........................................................................ 23 5.1.1 Building Envelope Opportunities .............................................................23 5.1.2 Controls Opportunities ............................................................................24 5.1.3 Electrical Opportunities ...........................................................................24 5.1.4 Mechanical Opportunities .......................................................................25 6.0 FINAL COSTING AND CHANGES FROM INITIAL REPORTING .................................. 26 6.1 CHANGES FROM INITIAL REPORTING – W HOLE VILLAGE/VEEP ............................... 26 6.2 CHANGES FROM INITIAL REPORTING – EECBG ..................................................... 28 6.3 FUNDING ALLOCATION SUMMARY TABLES ............................................................. 29 AAPPPPEENNDDIICCEESS APPENDIX A – WHOLE VILLAGE RETROFIT PROJECT COSTS & EXPECTED SAVINGS . A-1 APPENDIX B – EECBG PROJECT COSTS & EXPECTED SAVINGS ................................... B-1 APPENDIX C – EQUATIONS USED IN CALCULATIONS ...................................................... C-1 APPENDIX D – POST INSTALLATION PHOTOS ................................................................... D-1 Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 1 Alakanuk, AK EEXXEECCUUTTIIVVEE SSUUMMMMAARRYY This Final Post Installation Report summarizes the results of an Ameresco Energy Audit of the City of Alakanuk, the initial energy savings measures identified and proposed, and any changes that may have occurred throughout the installation process. The City of Alakanuk is a recipient of an Alaska Energy Authority (AEA) Whole Village Energy Efficiency Retrofit audit of $400,000 as well as an Energy Efficiency and Conservation Block Grant (EECBG) of $62,400. Ameresco engineers conducted an energy audit of the City of Alakanuk on October 20, 2010. The table below shows the buildings audited and their respective square footages. City of Alakanuk - Building Summary Building Category Square Footage City Hall Public Building 1,250 Police Department Public Building 1,200 Washeteria Public Building 9,000 Water Treatment Plant Public Facility 4,200 Alakanuk School School 20,000 The audit identified existing types, conditions, operating modes, and energy consumption profiles for a variety of buildings, facilities and systems. The audit also identified all cost-effective system and facility modifications, adjustments, alterations, additions, and retrofits. Systems investigated during the audit included heating, ventilation, interior and exterior lighting, process exhaust, domestic hot water, motors, building envelopes, utility metering systems, and energy management control systems (EMCS). The following tables show the results of Ameresco’s audit and potential calculation savings, allocated by grant. See Appendix A and Appendix B for more detailed calculation results. Project costs include costs incurred from the site visit, engineering time, materials cost, and labor cost, as well as Ameresco’s markup. It is important to note that the simple paybacks (SPBs) have been determined according to ECO type. For example, the SPB for an electrical ECO is calculated using only the annual kWh savings, even though the equivalent annual fuel gallon monetary savings is reported. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 2 Alakanuk, AK WHOLE VILLAGE/VEEP – PROJECT COSTS & EXPECTED SAVINGS – ALAKANUK ECO Cost Savings SPB B01 - WEATHER-STRIPPING UPGRADE $ 4,184.02 $ 444.10 9.42 B02 - THERMAL INSULATION UPGRADE $ 23,794.32 $ 303.92 78.29 B03 - ENERGY EFFICIENT WINDOW UPGRADE $ 45,435.15 $ 440.30 103.19 B04 - ENERGY EFFICIENT DOOR UPGRADE $ 14,439.80 $ 137.56 104.97 C01 - PROGRAMMABLE THERMOSTAT UPGRADE $ 2,014.39 $ 7,317.95 0.28 E01 - T8 LIGHTING UPGRADE $ 20,744.67 $ 1,004.64 20.65 E02 - T5 LIGHTING UPGRADE $ 7,050.36 N/A N/A E03 - INSTALL OCCUPANCY SENSORS $ 4,773.19 $ 1,677.39 2.85 E05 - CFL LIGHTING UPGRADE $ 2,855.41 $ 245.99 11.61 E06 - LED LIGHTING UPGRADE $ 41,127.93 $ 1,253.59 32.81 E07 - STREET LIGHTING UPGRADE $ 41,127.93 $ 2,298.32 17.89 E08 - LED EXTERIOR LIGHTING UPGRADE $ 31,317.72 $ 1,374.89 22.78 M02 - BOILER REBUILD $ 59,946.30 $ 1,986.67 30.17 M03 - INDIRECT WATER HEATER UPGRADE $ 41,408.07 $ 2,727.90 7.30** M04 - DOMESTIC WATER HEATER UPGRADE $ 19,626.59 $ 349.24 56.20 M05 - HEAT TRACE CONTROLS UPGRADE $ 29,400.19 $ 690.35 42.59 AVAILABLE FUNDING $ 10,753.95 * Available funding allocated to Kotlik. ** SPB takes into account cost of required upgrade GRANT TOTAL $ 400,000.00 VILLAGE TOTAL $ 389,246.05 $ 22,252.83 16.53** EECBG - PROJECT COSTS & EXPECTED SAVINGS - ALAKANUK ECO Cost Savings SPB B01 - WEATHERSTRIPPING $ 2,437.08 $ 110.25 22.11 E04 - PREMIUM EFFICIENCY MOTORS UPGRADE $ 56,038.91 $ 629.38 89.04 M01 - BOILER TUNE-UP $ 9,758.86 $ 21,084.76 0.46 TOTAL PROJECT COST $ 68,234.85 $ 21,824.38 3.13 TOTAL EECBG GRANT $ 62,400.00 BUDGET EXCEEDED $ (5,834.85) Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 3 Alakanuk, AK 11..00 BBUUIILLDDIINNGG DDEESSCCRRIIPPTTIIOONNSS 11..11 AALLAAKKAANNUUKK WWAASSHHEETTEERRIIAA Description: The Alakanuk Washeteria is a bit run down, but is still serving its purpose. The building itself is in good condition, but some of the equipment inside no long functions. The washeteria operates Thursdays through Sundays. At 8:00 pm, tokens are no longer available, and the sauna is turned off. Typically, 6 to 7 loads of laundry are done each day at the facility. General Conditions: The building exterior is in good condition, but the interior is fair. Much of the laundry equipment has been poorly cared for, is run down, or is not functional. One of the bathrooms/saunas is currently being used for storage and is not operational. The boilers are also in poor condition, and one was not operational at the time of the audit. Pictures of general conditions found during the field audit immediately follow this building description. Building Envelope: The standing seam metal exterior of the building appears to be in good condition, with no cracks or major defects. The standing seam metal roof of the building also appears to be in good condition, but there is very little insulation in the ceiling. The aluminum doors are in good condition and appear to seal well. There are no exterior windows in the building. Air Distribution: A PACE air handling unit (AHU) provides the building with 8612 cubic feet per minute (cfm) of air distribution. This unit is equipped with preheat and heating coils. At the time of the audit, the unit did not appear to be operational. One of the exhaust fan motors is currently missing a belt; it appears, however, that this is the exhaust fan for the men’s bathroom and sauna, which is currently not operational. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 4 Alakanuk, AK Heating: Two Weil-McLain fuel oil model 86 boilers (sizes 786 and 886) provide heating to the building in conjunction with the PACE AHU. These boilers are discontinued models and were about 82% efficient at time of manufacture. The 786 model boiler was not operational at the time of the audit and needed many parts for repairs. Controls: The building does not currently have a direct digital control (DDC) energy management control system (EMCS). Building zones are controlled by mechanical thermostats. Lighting: Interior lighting consists primarily of T12 fluorescent lamps with magnetic ballasts. Several 75 watt and 100 watt incandescent fixtures are also used for interior light. Exterior lighting is provided by 100 watt high pressure sodium (HPS) fixtures. Domestic Water: Ameresco engineers were unable to gather information on the domestic water heater(s) at the time of the audit. The faucet in the women’s bathroom and sauna is rated for 2.0 gallons per minute (gpm), but currently flows at 1.0 gpm. There are 3 showers that flow at 2.5 gpm, and there are 2 toilets that are 1.6 gallons per flush (gpf). The men’s room is identical to the women’s, but is not currently operational. Instead, the sauna-use rotates between men’s and women’s nights. Laundry Equipment: The laundry equipment in the Alakanuk Washeteria is a mixture of several manufacturers, and the equipment ages vary considerably. There are a total of 5 Wascomat Senior washers, mostly Model W124. There are also two Bock Engineered Product (BEP, today North Star Engineered Products) laundry centrifuges from 1997. There are a total of 8 American Dryer Corp dryers in the facility of varying ages and models, but only 3 of these are currently functional. The functional dryers all date near 1992. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 5 Alakanuk, AK Building Photos: Alakanuk Washeteria Wascomat Washers American Dryer Corp Dryers BEP Centrifuges Dryer Tubing Exhaust Fan Motor Missing Belt Weil-McLain Boilers Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 6 Alakanuk, AK 11..22 AALLAAKKAANNUUKK WWAATTEERR TTRREEAATTMMEENNTT PPLLAANNTT Description: The Alakanuk Water Treatment Plant handles all of the village’s water conditioning. There is a single full time operator on site. The building is also houses the sewage treatment system for the village. General Conditions: The facility as a whole is in good condition although there is some equipment that could be cleaned up or needs to be repaired. There are no obvious major structural defects. Interior spaces are comfortable. The boiler room of the building is in need of the most work. One section of the heat trace system is leaking badly and is in need of repair or replacement. Pictures of general conditions found during the field audit immediately follow this building description. Building Envelope: The structure of the facility appears to be in good condition with no major flaws. Weather-stripping for all exterior doors, including the large bay door, is in good condition. Windows are in good condition. The walls and ceiling of the warehouse/vehicle bay appear to be well insulated, and insulation is in good condition. Heating: Two Weil-McLain Model 88 boilers provide the facility with heating. The boilers appear to be in good condition and are rated at 84% efficient. Controls: Building zone heating is controlled by a series of mechanical thermostats placed throughout the building. Lighting: Interior lighting fixtures are mostly T12 fluorescent with magnetic ballasts. There are a few small exterior wall pack HPS fixtures ranging from 50 to 100 watts. Domestic Water: The water treatment plant houses many pumps and motors of varying ages and efficiencies. Opportunities exist here for more efficient replacements. According to the plant operator, Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 7 Alakanuk, AK usually only one of the smaller treated water pumps runs, but occasionally other pumps will kick on to carry the rest of the load. Vacuum System: There are a total of 4 vacuum pumps (15 hp) between two AIRVAC systems at the water treatment plant. The upper level system handles the plant’s treated water, while the sewage system is housed below. Vacuum sewage systems are installed in bush Alaska due to permafrost and lack of available pitch. The system originates at the treatment facility and is in good operational condition. The vacuum pump motor runs 24/7 to meet village requirements. A higher efficiency motor will result in measurable savings for this system. Heat Trace: To prevent system freeze ups, hot water heat trace pumps that run throughout the water and sewer distribution system originate from this facility. The system is manually controlled and runs at all times or at operators’ discretion. Limiting the operation of the heat trace based on outside air or ground temperatures will provide significant savings to the village. According to the plant operator, some of the heat trace pumps are running continuously. The system pumps hot water from the boilers through out the village water and sewer distribution system to minimize freeze ups in below freezing weather. When the outside temperatures are above freezing the system should be shut down. Automatically controlling the pumps to run only when temperatures drop in a range where freeze ups of the distribution system are possible will decrease overall energy usage by reducing pump operation as well as hot water generation Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 8 Alakanuk, AK Building Photos: Alakanuk Water Treatment Plant Treated Water Pump System AIRVAC System – Treated Water Weil-McLain Model 788 Boilers Leaky Heat Trace System Leaky Heat Trace System Insulated Bay Door and Weather-stripping Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 9 Alakanuk, AK 11..33 AALLAAKKAANNUUKK SSCCHHOOOOLL Description: The Alakanuk School houses elementary through high school age students. The elementary and middle school students are in one wing of the building, while the high school classrooms are in the other wing near the gym/cafeteria and office area. General Conditions: The building is in good condition and is probably the best maintained facility in the village. Structurally, the building appears to have no major defects, and the standing seam exterior and roof and in good condition. The HVAC and other mechanical equipment are in good condition and appear to be well-maintained. Pictures of general conditions found during the field audit immediately follow this building description. Building Envelope: The building appears to be structurally in good condition. The exterior shows some signs of weathering, but there are no major faults. Windows are a mixture of clear single-pane glass or plexi-glass and are in fair condition due to some scratches and cracks. Insulation appears sufficient in most places. Doors and weather-stripping are in good condition. Heating: Two Burnham boilers work in conjunction with two Trane air handling units (AHUs) to heat the school. The boilers are fairly new and in good condition and are listed at 84.6% efficient. Each of the AHUs provides the school with 3000 cubic feet per minute (cfm) of air; these AHUs are in good condition as well. Controls: Building zones are controlled by a series of mechanical thermostats. Lighting: Interior lighting consists of mainly T12 fluorescent fixtures with magnetic ballasts, as well as a handful of incandescent fixtures. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 10 Alakanuk, AK Domestic Water: An 80 gallon Amtrol Boilermate indirect-fired water heater supplies the building with heated domestic water. The water heater appears to be relatively new and in good condition. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 11 Alakanuk, AK Building Photos: Alakanuk School Burnham Boilers Trane Air Handling Unit (AHU-2) Circulating Pumps Typical Window Amtrol Indirect-Fired Water Heater Trane Air Handling Unit and Ductwork (AHU-1) Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 12 Alakanuk, AK 11..44 OOTTHHEERR AALLAAKKAANNUUKK BBUUIILLDDIINNGGSS SSUURRVVEEYYEEDD City Hall: The Alakanuk City Hall building is in poor condition structurally. The exterior of the building has been damaged, and insulation is beginning to deteriorate or fall out. Many of the windows have been boarded up. Doors are in good condition, although they have poor weather-stripping. The roof appears to be in good condition. Interior lights are T12 fluorescent fixtures with magnetic ballasts. Interior spaces are in fair condition overall. Housing Unit: The housing unit audited by Ameresco is in fair condition. Several of the windows have been boarded up, and the ones that remain are in fair condition due to cracks or other damage. Doors are in good condition, but their weather-stripping is in poor condition. A single room heater heats the building. Although the building appears to be unoccupied, Ameresco engineers found running water in the bathroom tub upon entering the building. Interior lighting consists of T12 fluorescent fixtures with magnetic ballasts. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 13 Alakanuk, AK Alakanuk Police Department: The Police Department building is in fair condition; the wood exterior is showing many signs of age and weathering, as is the standing seam metal roof. Several of the windows have been boarded up, usually due to broken glass. Some of the remaining double paned windows have cracked or broken glass. The hatch to the attic does not have any sort of cover, and the roof has no insulation. There is some insulation above the ceiling of the building, but there are still many opportunities for heat to escape through the attic and roof. A single electric room heater provides the building with heat. Maintenance Shop: The Alakanuk maintenance facility is in good condition. The exterior standing seam siding and roof show little signs of weather or damage. Windows are in good condition. Doors are insulated and have adequate weather-stripping. Interior lights have been retrofit to T5 high bay fixtures. An Energy Logic waste oil burner heats the facility. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 14 Alakanuk, AK Building Photos: Other Alakanuk Buildings Surveyed Exterior Damage to City Hall Building Water Running in Vacant Housing Unit Police Department – No Door to Attic Access Police Department - Existing Attic Insulation Oil Burner in Maintenance Shop Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 15 Alakanuk, AK 22..00 UUTTIILLIITTIIEESS 22..11 EELLEECCTTRRIICCIITTYY The City of Alakanuk purchases its electricity from the Alaskan Village Electric Cooperative (AVEC). Village facilities are billed on an electric use and fuel use to provide the electricity. Some facilities may also qualify for a Power Cost Equalization (PCE) incentive. The AVEC rates for the City of Alakanuk are listed below. AVEC Cost of Fuel (Added to Customer Electric Bill) $ 0.2558 Rate Per kWh, Fuel Cost Included (1-700 kWh) $ 0.5558 Rate Per kWh, Fuel Cost Included (Over 700 kWh) $ 0.4558 PCE Rate (1-700 kWh) $ 0.3392 PCE Rate (Over 700 kWh) $ 0.3119 The following buildings currently receive PCE funding:  Alakanuk City Hall  Alakanuk Police Department  Maintenance Shop  Housing Unit  Alakanuk Water Treatment Plant  Alakanuk Washeteria The Lower Yukon School District has its own agreement with AVEC and does not receive PCE funding. The AVEC rates for the Alakanuk School are listed below. AVEC Average Cost of Fuel $ 0.22613 Rate Per kW $ 45.00 Rate Per kWh, Fuel Cost Included (1-1,500 kWh) $ 0.34613 Rate Per kWh, Fuel Cost Included (Over 1,500 kWh) $ 0.26613 Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 16 Alakanuk, AK 22..11..11 EElleeccttrriicciittyy UUssaaggee PPrrooffiilleess City Hall Estimated Electric Usage 0 100 200 300 400 500 600 700 800 Aug- 09 Sep- 09 Oct- 09 Nov- 09 Dec- 09 Jan- 10 Feb- 10 Mar- 10 Apr- 10 May- 10 Jun- 10 Jul- 10 Aug- 10kWh Police Department Estimated Electric Usage 0 200 400 600 800 1000 1200 1400 Aug- 09 Sep- 09 Oct- 09 Nov- 09 Dec- 09 Jan- 10 Feb- 10 Mar- 10 Apr- 10 May- 10 Jun- 10 Jul- 10 Aug- 10kWh Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 17 Alakanuk, AK Housing Unit Estimated Electric Usage 0 500 1000 1500 2000 2500 Aug- 09 Sep- 09 Oct- 09 Nov- 09 Dec- 09 Jan- 10 Feb- 10 Mar- 10 Apr- 10 May- 10 Jun- 10 Jul- 10 Aug- 10kWh Water Treatment Plant Estimated Electric Usage 0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000 Aug- 09 Sep- 09 Oct- 09 Nov- 09 Dec- 09 Jan- 10 Feb- 10 Mar- 10 Apr- 10 May- 10 Jun- 10 Jul- 10 Aug- 10kWh Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 18 Alakanuk, AK Watsheteria/Sauna Estimated Electric Usage 0 1000 2000 3000 4000 5000 6000 Aug- 09 Sep- 09 Oct- 09 Nov- 09 Dec- 09 Jan- 10 Feb- 10 Mar- 10 Apr- 10 May- 10 Jun- 10 Jul- 10 Aug- 10kWh School Electric Usage (kWh) 0 5000 10000 15000 20000 25000 Oct- 09 Nov- 09 Dec- 09 Jan- 10 Feb- 10 Mar- 10 Apr- 10 May- 10 Jun- 10 Jul-10 Aug- 10 Sep- 10kWh Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 19 Alakanuk, AK School Electric Demand (kW) 40 42 44 46 48 50 52 54 Oct- 09 Nov- 09 Dec- 09 Jan- 10 Feb- 10 Mar- 10 Apr- 10 May- 10 Jun- 10 Jul-10 Aug- 10 Sep- 10kW 22..22 FFUUEELL The City of Alakanuk purchases its fuel from Ruby Marine, Inc. Ruby Marine provides diesel fuel to the city in two bulk shipments each year. The most current rate is listed below. Diesel (October 2010) $ 3.12 The Alakanuk School has its own fuel contract with Crowley Petroleum Distribution, Inc. The school purchases its fuel from Crowley at a rate of $2.9286/gallon. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 20 Alakanuk, AK 33..00 OOPPEERRAATTIIOONNSS//MMAAIINNTTEENNAANNCCEE PPRRAACCTTIICCEESS The village has a number of designated maintenance personnel that seem to possess the basic skills required to clean and maintain selected equipment. From Ameresco’s observations, if the equipment should fall into disrepair, the staff does not have the skill to repair the equipment per the manufacturer’s requirements and tends to piece together the equipment to maintain operation. Over time, the systems no longer function as required, which currently appears to be the case of most equipment and systems with in the village. Operations and maintenance is one area in energy services where improvement and training costs are lower than equipment replacement costs, and the energy efficiency return is high. During the site audit, Ameresco found that outside of general cleaning, most of the equipment is not maintained to meet standard manufacturers’ recommendations. Dirty filters, boilers in disrepair, systems altered, and control systems disconnected are a result of limited funding and lack of system training. This results in excessive energy use, premature equipment failure, and employee and resident discomfort. An annual system check by a qualified burner service technician to perform services such as boiler cleaning, boiler tune ups, system check out, and control system reviews will not only extend the overall life of the equipment, but improve occupant comfort as well as increase and maintain long term energy efficiency. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 21 Alakanuk, AK 44..00 WWHHOOLLEE VVIILLLLAAGGEE AAUUDDIITT IINNIITTIIAATTIIVVEESS -- PPRROOPPOOSSEEDD Section 4 details opportunities for the City of Alakanuk’s Whole Village Energy Efficiency Retrofit granted by the Alaska Energy Authority. 44..11 LLIIGGHHTTIINNGG EEXXCCHHAANNGGEE PPRROOGGRRAAMM Ameresco proposes a lighting exchange program that will encompasses all village residences and buildings. Since the majority of fixtures at the residential level are incandescent, Ameresco proposes to send a pre-determined number of 7-watt LED lights to be exchanged for incandescent bulbs from village residences. This program, if instituted, will decrease energy usage and costs for lighting for all residences that take advantage of this program. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 22 Alakanuk, AK 55..00 EENNEERRGGYY CCOONNSSEERRVVAATTIIOONN OOPPPPOORRTTUUNNIITTIIEESS The ECO matrix below summarizes the energy conservation opportunities identified and proposed during the site survey and baseline analysis. A description of each energy conservation opportunity follows the matrix. Please Note: This matrix applies to the initial proposal and the ECOs identified during that stage of the Alakanuk project. There are some ECOs included in this section that were not performed, or the scope of work may have changed. Section 5 is for reference only. See Section 6 for updated project information. ECO No. ECO Description ECO MATRIX B=Building Envelope; C=Controls; E=Electrical; M=Mechanical; W=Water/Wastewater; R=Renewable ALAKANUK Washeteria Water Treatment School City Hall Police Department Whole Village Building Envelope B01 Door Weather-stripping Upgrade X B02 Insulation Upgrade X X X B03 Energy Efficient Window Upgrade X B04 Energy Efficient Door Upgrade X B05 Install Access Panel to Attic X Controls C01 Thermostat Upgrade X X X C02 System Flow Control X Electrical E01 T-8 Lighting Upgrade X X X X X E02 T-5 Lighting Upgrade X E03 Occupancy Sensors X X X X X E04 Premium Efficiency Motors X E05 CFL Lighting Upgrade X X E06 Residential Lighting Upgrade X Mechanical M01 Boiler Tune-Up X X M02 Boiler Upgrade X Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 23 Alakanuk, AK EECBG – INITIAL PROPOSAL (FINAL AUDIT REPORT) ECO Cost Savings SPB B01 - WEATHERSTRIPPING $ 1,570.00 $ 110.25 14.24 B05 - INSTALL ACCESS DOOR TO ATTIC $ 700.00 $ 32.96 21.24 C02 - SYSTEM FLOW CONTROL $ 5,460.00 $ 119.53 45.68 E04 - PREMIUM EFFICIENCY MOTORS UPGRADE $ 39,270.00 $ 1,798.22 21.84 M01 - BOILER TUNE-UP $ 8,400.00 $ 27,908.77 0.30 DESIGN/AUDIT $ 5,000.00 N/A N/A ADDITIONAL LABOR/INSTALL $ 2,000.00 N/A N/A TOTAL $ 62,400.00 $ 29,969.72 2.08 WHOLE VILLAGE – INITIAL PROPOSAL (FINAL AUDIT REPORT) ECO Cost Savings SPB B02 - THERMAL INSULATION UPGRADE $ 42,300.00 $ 1,131.72 37.38 B03 - ENERGY EFFICIENT WINDOW UPGRADE $ 24,200.00 $ 340.97 70.97 B04 - ENERGY EFFICIENT DOOR UPGRADE $ 45,000.00 $ 671.49 67.02 C01 - PROGRAMMABLE THERMOSTAT UPGRADE $ 800.00 $ 7,317.95 0.11 E01 - T8 LIGHTING UPGRADE $ 115,000.00 $ 7,295.53 15.76 E02 - T5 LIGHTING UPGRADE $ 23,000.00 $ 2,294.68 10.02 E03 - INSTALL OCCUPANCY SENSORS $ 8,500.00 $ 8,921.43 0.95 E05 - CFL LIGHTING UPGRADE $ 700.00 $ 286.34 2.44 E06 - LED LIGHTING UPGRADE $ 21,000.00 $ 1,253.59 16.75 M02 - BOILER UPGRADE $ 41,000.00 $ 3,061.67 13.39 DESIGN/AUDIT $ 33,000.00 N/A N/A ADDITIONAL LABOR/INSTALL $ 45,500.00 TOTAL $ 400,000.00 $ 32,575.38 12.28 55..11 EECCOO DDEESSCCRRIIPPTTIIOONNSS -- PPRROOPPOOSSEEDD Below are the descriptions of the Energy Conservation Opportunities (ECOs) that Ameresco analyzed for the Village of Alakanuk. These include Ameresco’s initial project recommendations for the village. 55..11..11 BBuuiillddiinngg EEnnvveellooppee OOppppoorrttuunniittiieess B01 – Door Weather-stripping Upgrade This ECO proposes applying weather stripping to exterior door perimeters to reduce air infiltration into the buildings. Many building doors have existing weather stripping material which is worn or missing. B02 – Thermal Insulation Upgrade This ECO proposes installing blown-in roof insulation on existing building envelopes to reduce energy consumption. Insulation can be added to roofs to increase or renew their insulating ratings (R-value). Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 24 Alakanuk, AK B03 – Energy Efficient Windows This ECO proposes installing new windows with improved heat transfer resistivity. This ECO would improve insulating values of the fenestration and reduce the negative energy effects of insolation. B04 – Energy Efficient Doors This ECO proposes installing new insulated doors. The installation would improve U-values of the current hollow metal doors, single pane glass doors, and un-insulated bay doors connected to conditioned spaces. B05 – Install Access Panel to Attic This ECO proposes installing an access panel to a building’s attic. Without this access panel, building heating is allowed to escape into the attic and is wasted. An access panel to the attic would further insulate heated building spaces and reduce heating costs. 55..11..22 CCoonnttrroollss OOppppoorrttuunniittiieess C01 – Thermostat Upgrade This ECO proposes replacing the outdated mechanical thermostats with 7-day programmable thermostats. The programmable thermostats would allow a building’s HVAC system to be scheduled to operate in comfortable conditions while occupied and allow for night set-backs. C03 – System Flow Control This ECO proposes redesigning the system flow in various facilities to be more efficient. In Alakanuk, this ECO pertains to the Water Treatment Plant’s heat trace system. 55..11..33 EElleeccttrriiccaall OOppppoorrttuunniittiieess E01 – T8 Lighting Upgrade This ECO proposes replacing current T-12 fluorescent lighting and magnetic ballast with T-8 lamps and electronic ballasts. Post-light levels will be nearly equal or better to that of the existing lighting systems, E02 – T5 Lighting Upgrade This ECO proposes replacing high intensity discharge (HID) lighting systems in the medium and high bay areas such as the water treatment plant, maintenance shops, school, etc., with T5 fluorescent fixtures. HID lighting is often used in areas with high ceilings or roof structures. The fixtures generate high luminous flux, are reasonably energy efficient, and are long lasting. Such systems often remain illuminated continuously since the re-strike times make periodic switching in irregularly occupied spaces Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 25 Alakanuk, AK a nuisance. Continuous operation of HID fixtures reduces the overall energy efficiency of lighting systems designed around their use. Newer, high output fluorescent sources, characterized by quick warm- up, with instant light output and improved efficiency, are now being used in place of many medium wattage HID fixtures in low and high bay applications. Post-light levels will be nearly equal to that of the existing lighting systems E03 – Occupancy Sensors Lighting systems are often left energized in unoccupied areas. This ECO proposes to install sensors to shut off lighting in unoccupied spaces. Common sensing technologies include infrared, ultrasonic, and audible sound, often combining multiple types of sensing in one unit to avoid shutting off lights in an occupied area. E04 – Premium Efficiency Motors This ECO proposes installing National Electrical Manufacturers Association (NEMA) premium efficiency motors to replace standard and high efficiency motors. There are various mechanical systems operating with inefficient motors throughout the base. Premium efficiency motors typically increase energy efficiency by 2-3%. E05 – Residential Lighting Upgrade See Section 4.3. 55..11..44 MMeecchhaanniiccaall OOppppoorrttuunniittiieess M01 – Boiler Tune-Up This ECO proposes a comprehensive re-commissioning of the boilers in each building to optimize system operations. Such efforts include:  Replace, repair, calibrate or install sensors or switches  Repair air linkages  Conduct combustion efficiency test services  Clean combustion chambers and stacks M02 – Boiler Upgrade This ECO proposes replacing existing hot-water heating boilers with more energy efficient units. Many of the existing units in the village are original to the buildings they serve and have reached the end of their useful service life. Boilers employing modern technology can be installed to reduce energy consumption, improve system operations, and reduce maintenance costs. In some cases, this ECO proposes adding a storage tank to replace a building’s domestic water heater. See M03 for details. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 26 Alakanuk, AK 66..00 FFIINNAALL CCOOSSTTIINNGG AANNDD CCHHAANNGGEESS FFRROOMM IINNIITTIIAALL RREEPPOORRTTIINNGG Due to the brief nature of these contracts and the high cost of travel to and from the villages, audits were conducted a quickly and efficiently as possible. Once engineers have left the villages, communication is strained at best, and gathering additional information is difficult. Because of this, assumptions must be made during the initial ECO assessments and project cost estimates. Occasionally, Ameresco engineers have found that previously identified projects have been externally funded from another source, but this information usually comes too late in the process. As a result of all these factors, some previously identified projects have been modified or abandoned. Final project costs and expected annual savings can be found in Appendix A and Appendix B. ECOs that were categorized as “Not Funded,” whether in the initial stages of the proposal or during construction, can be found in Appendix C. 66..11 CCHHAANNGGEESS FFRROOMM IINNIITTIIAALL RREEPPOORRTTIINNGG –– WWHHOOLLEE VVIILLLLAAGGEE//VVEEEEPP IMPORTANT NOTE: After the audit and initial recommendations, Ameresco learned that a new Alakanuk School was scheduled to be constructed sometime in 2012. Upon receiving this news, all ECOs tagged for the school were removed, and the scope of work (SOW) was updated to reflect this. Details are explained below. B01 – Weather-stripping Newly added ECO. Installed as planned in the City Hall, Police Department, and Garage/Shop Building. B02 – Thermal Insulation Upgrade This ECO was thrown out at the Washeteria as the building was found to have a hot roof under closer examination. Completed as planned at the City Hall and Police Department. B03 – Energy Efficient Window Upgrade Installed in the City Hall and Police Station in lieu of the Alakanuk School. B04 – Energy Efficient Door Upgrade Installed in the City Hall and Police Station in lieu of the Alakanuk School. C01 – Programmable Thermostat Upgrade Installed as planned. E01 – T8 Lighting Upgrade Installed as planned in all buildings (City Hall, Police Station, and Washeteria) except for the Alakanuk School. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 27 Alakanuk, AK E02 – T5 Lighting Upgrade This ECO was removed from the scope of Ameresco’s project. Ameresco mobilized for construction before word was received that a T5 upgrade had been paid for by another grant. The lights were handed over to the Alaska Building Science Network per the request of the AEA. E03 – Occupancy Sensors Installed as planned in the City Hall, Police Station, Washeteria, and Water Treatment Plant. Not installed at the Alakanuk School. E05 – CFL Upgrade Installed as planned. E06 – LED Lighting Upgrade The Alaska Housing Craftsman Program successfully distributed 600 LED light bulbs during the Village Energy Efficiency Fair. E07 – LED Street Lighting Upgrade Installed as planned. E08 – Exterior Lighting Upgrade Installed as planned for 11 of 13 fixtures. The remaining 2 fixtures could not be installed due to code issues. M02 – Boiler Rebuild Newly added ECO. This ECO consisted of completely rebuilding the 2 existing boilers in the Alakanuk Washeteria and upgrading their existing burners. M03 – Indirect Water Heater Upgrade Newly added ECO. Installed in the Washeteria. Note: There is an additional savings in this ECO that affects the SPB calculation. The existing water heater failed its inspection and needed to be replaced no matter what. The cost of installation of a new water heat of the same make has been subtracted from the total project install cost to find the simple payback. M04 – Domestic Water Heater Upgrade Newly added ECO. Installed in the City Hall. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 28 Alakanuk, AK M05 – Heat Trace System Upgrade Newly added ECO. Installed in the Washeteria and Water Treatment Plant. This ECO consisted of a control valve and valve actuator upgrade on the existing heat trace system. Several valves had failed, so operators were controlling the system flow manually by using the ball valves installed in the system intended for service and isolation. Because of this, the heat trace loops were overheating the domestic water and sewer lines for the village. The heat trace loops are now operating correctly and adjusted to provide the correct amount of system heat required for freeze prevention. 66..22 CCHHAANNGGEESS FFRROOMM IINNIITTIIAALL RREEPPOORRTTIINNGG –– EEEECCBBGG B01 – Weather-stripping Installed as planned. B05 – Install Access Door to Attic ECO removed from Ameresco’s scope of work. The access door was found and reinstalled after the initial audit. C02 – System Flow Control ECO removed from scope. E04 – Premium Efficiency Motor Upgrade Installed as planned. M01 – Boiler Tune-Up Completed as planned in the Water Treatment Plant. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Alakanuk Page 29 Alakanuk, AK 66..33 FFUUNNDDIINNGG AALLLLOOCCAATTIIOONN SSUUMMMMAARRYY TTAABBLLEESS WHOLE VILLAGE/VEEP – PROJECT COSTS & EXPECTED SAVINGS – ALAKANUK ECO Cost Savings SPB B01 - WEATHER-STRIPPING UPGRADE $ 4,184.02 $ 444.10 9.42 B02 - THERMAL INSULATION UPGRADE $ 23,794.32 $ 303.92 78.29 B03 - ENERGY EFFICIENT WINDOW UPGRADE $ 45,435.15 $ 440.30 103.19 B04 - ENERGY EFFICIENT DOOR UPGRADE $ 14,439.80 $ 137.56 104.97 C01 - PROGRAMMABLE THERMOSTAT UPGRADE $ 2,014.39 $ 7,317.95 0.28 E01 - T8 LIGHTING UPGRADE $ 20,744.67 $ 1,004.64 20.65 E02 - T5 LIGHTING UPGRADE $ 7,050.36 N/A N/A E03 - INSTALL OCCUPANCY SENSORS $ 4,773.19 $ 1,677.39 2.85 E05 - CFL LIGHTING UPGRADE $ 2,855.41 $ 245.99 11.61 E06 - LED LIGHTING UPGRADE $ 41,127.93 $ 1,253.59 32.81 E07 - STREET LIGHTING UPGRADE $ 41,127.93 $ 2,298.32 17.89 E08 - LED EXTERIOR LIGHTING UPGRADE $ 31,317.72 $ 1,374.89 22.78 M02 - BOILER REBUILD $ 59,946.30 $ 1,986.67 30.17 M03 - INDIRECT WATER HEATER UPGRADE $ 41,408.07 $ 2,727.90 7.30** M04 - DOMESTIC WATER HEATER UPGRADE $ 19,626.59 $ 349.24 56.20 M05 - HEAT TRACE CONTROLS UPGRADE $ 29,400.19 $ 690.35 42.59 AVAILABLE FUNDING $ 10,753.95 * Available funding allocated to Kotlik. ** SPB takes into account cost of required upgrade GRANT TOTAL $ 400,000.00 VILLAGE TOTAL $ 389,246.05 $ 22,252.83 16.53** EECBG - PROJECT COSTS & EXPECTED SAVINGS - ALAKANUK ECO Cost Savings SPB B01 - WEATHERSTRIPPING $ 2,437.08 $ 110.25 22.11 E04 - PREMIUM EFFICIENCY MOTORS UPGRADE $ 56,038.91 $ 629.38 89.04 M01 - BOILER TUNE-UP $ 9,758.86 $ 21,084.76 0.46 TOTAL PROJECT COST $ 68,234.85 $ 21,824.38 3.13 TOTAL EECBG GRANT $ 62,400.00 BUDGET EXCEEDED $ (5,834.85) APPENDIX A WHOLE VILLAGE RETROFIT PROJECT COSTS & EXPECTED SAVINGS B01 - WEATHER-STRIPPING UPGRADE Building # of Doors Price Per Door Total Cost Electric kWh Savings Fuel mmBtu Savings Total mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh Cost Savings Annual Fuel Cost Savings Simple Payback City Hall 1 $597.72 $597.72 0.00 2.99 2.99 21.34 $0.00 $66.58 8.98 Garage/Shop 2 $597.72 $1,195.43 0.00 6.02 6.02 42.98 $0.00 $134.11 8.91 Police Department 2 $597.72 $1,195.43 0.00 5.98 5.98 42.68 $0.00 $133.16 8.98 Washeteria 2 $597.72 $1,195.43 0.00 4.95 4.95 35.34 $0.00 $110.25 10.84 B02 - THERMAL INSULATION UPGRADE Building Current Insulation Proposed Insulation Total Cost Electric kWh Savings Fuel mmBtu Savings Total mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh Cost Savings Annual Fuel Cost Savings Simple Payback City Hall R-20 R-38 $16,077.25 0.00 9.29 9.29 66.33 $0.00 $206.95 77.69 Police Department R-5 R-38 $7,717.08 0.00 4.35 4.35 31.08 $0.00 $96.97 79.58 B03 - ENERGY EFFICIENT WINDOW UPGRADE Building # of Windows Price Per Window Total Cost Electric kWh Savings Fuel mmBtu Savings Total mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh Cost Savings Annual Fuel Cost Savings Simple Payback City Hall 5 $4,543.51 $22,717.57 0.00 15.92 15.92 113.74 $0.00 $354.86 64.02 Police Department 5 $4,543.51 $22,717.57 0.00 3.83 3.83 27.39 $0.00 $85.44 265.88 B04 - ENERGY EFFICIENT DOOR UPGRADE Building # of Doors Price Per Door Total Cost Electric kWh Savings Fuel mmBtu Savings Total mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh Cost Savings Annual Fuel Cost Savings Simple Payback City Hall 1 $7,219.90 $7,219.90 0.00 3.09 3.09 22.05 $0.00 $68.78 104.97 Police Department 1 $7,219.90 $7,219.90 0.00 3.09 3.09 22.05 $0.00 $68.78 104.97 C01 - PROGRAMMABLE THERMOSTAT UPGRADE Building # of Thermo- stats Installed Cost Per Thermostat Total Cost Electric kWh Savings Fuel mmBtu Savings Total mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh Cost Savings Annual Fuel Cost Savings Simple Payback Washeteria 1 $1,007.20 $1,007.20 0.00 75.20 75.20 537.15 $0.00 $1,573.11 0.64 Water Treatment 1 $1,007.20 $1,007.20 0.00 274.63 274.63 1,961.64 $0.00 $5,744.85 0.18 E01 - T8 LIGHTING UPGRADE Building # of Fixtures Price Per Fixture Total Cost Electric kWh Savings Electric kW Savings Equivalent mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh Cost Savings Annual Equivalent Fuel Cost Savings Simple Payback Washeteria 27 $227.96 $6,155.01 988.04 8.35 3.37 71.70 $214.01 $223.71 28.76 Water Treatment 36 $227.96 $8,206.68 2,833.38 16.68 9.67 205.62 $613.71 $641.52 13.37 City Hall 18 $227.96 $4,103.34 576.58 4.75 1.97 41.84 $124.89 $130.55 32.86 Police Department 10 $227.96 $2,279.63 240.24 2.64 0.82 17.43 $52.04 $54.39 43.81 E02 - T5 LIGHTING UPGRADE Building # of Fixtures Price Per Fixture Total Cost Electric kWh Savings Electric kW Savings Equivalent mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh Cost Savings Annual Equivalent Fuel Cost Savings Simple Payback School 33 $213.65 $7,050.36 N/A N/A N/A N/A N/A N/A N/A APPENDIX A - WHOLE VILLAGE RETROFIT PROJECT COSTS & EXPECTED SAVINGS - ALAKANUK Note: The reported simple paybacks are based on the type of ECO listed. For example, electrical ECOs only use the Annual kWh Cost Savings column to calculate the SPB, even though the Annual Equivalent Fuel Cost Savings is still reported. E03 - INSTALL OCCUPANCY SENSORS Building # of Fixtures Price Per Fixture Total Cost Electric kWh Savings Electric kW Savings Equivalent mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh Cost Savings Annual Equivalent Fuel Cost Savings Simple Payback Washeteria 5 $277.03 $1,385.14 1,767.71 0.00 6.03 128.28 $382.89 $400.24 3.62 Water Treatment 5 $277.03 $1,385.14 5,194.43 0.00 17.73 376.95 $1,125.11 $1,176.10 1.23 City Hall 3 $277.03 $866.67 606.53 0.00 2.07 44.02 $131.37 $137.33 6.60 Police Department 4 $277.03 $1,136.24 175.50 0.00 0.60 12.74 $38.01 $39.74 29.89 E05 - CFL LIGHTING UPGRADE Building # of Lamps to Change Price Per Lamp Total Cost Electric kWh Savings Electric kW Savings Equivalent mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh Cost Savings Annual Equivalent Fuel Cost Savings Simple Payback Washeteria 20 $142.77 $2,855.41 1135.68 9.6 3.88 82.42 $245.99 $257.14 11.61 E06 - LED LIGHTING UPGRADE Number of Bulbs to be Exchanged Typical Lamp Wattage (kW) LED Wattage (kW)Total Cost Electric kWh Savings Electric kW Savings Equivalent mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh Cost Savings Annual Equivalent Fuel Cost Savings Simple Payback 600 60 7 $41,127.93 5,787.60 31.80 19.75 420.00 $1,253.59 $1,310.40 32.81 E07 - STREET LIGHTING UPGRADE Number of Fixtures for Retrofit Existing Fixture Retrofit Fixture Total Cost Electric kWh Savings Electric kW Savings Equivalent mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh Cost Savings Annual Equivalent Fuel Cost Savings Simple Payback 33 150W HPS 47W LED $41,127.93 15,971.67 43.76 54.51 1,159.05 $2,298.32 3,616.23 17.89 E08 - LED EXTERIOR LIGHTING UPGRADE Number of Fixtures to be Exchanged # of Lamps Changed Price Per Fixture Total Cost Electric kWh Savings Electric kW Savings Equivalent mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh Cost Savings Annual Equivalent Fuel Cost Savings Simple Payback City Hall 2 $2,847.07 $5,694.13 1,298.18 3.70 4.43 94.21 $281.19 $293.93 20.25 Garage/Shop 2 $2,847.07 $5,694.13 1,298.18 3.70 4.43 94.21 $281.19 $293.93 20.25 Water Treatment 5 $2,847.07 $14,235.33 2,453.06 6.98 8.37 178.02 $531.33 $555.41 26.79 Washeteria 2 $2,847.07 $5,694.13 1,298.18 3.70 4.43 94.21 $281.19 $293.93 20.25 M02 - BOILER REBUILD Building # of Boilers to Replace Increase in Efficiency Total Cost Electric kWh Savings Fuel mmBtu Savings Total mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh Cost Savings Annual Fuel Cost Savings Simple Payback Washeteria 2 3.00% $59,946.30 0.00 89.15 89.15 636.75 $0.00 $1,986.67 8.78 M03 - INDIRECT WATER HEATER UPGRADE Building Number of Heaters Increase in R- Value Total Cost Electric kWh Savings Fuel mmBtu Savings Total mmBtu Savings Equivalent Fuel Gallons Savings Replacement Water Heater Cost Savings* Annual Fuel Cost Savings Simple Payback Washeteria 2 R-7 to R-16 $41,408.07 0.00 51.65 51.65 712.25 $21,482.00 $2,727.90 7.30 *One-time project cost that affects the simple payback of the project. Note: The following table (E06) is a village-wide energy retrofit initiave. Therefore the savings reported in "Annual kWh Cost Savings" and "Annual Equivalent Fuel Cost Savings" are village-wide savings. NOTE: This SPB calculation is different because there is a cost savings realized by the necessity of having to replace the existing water heater anyway. M04 - DOMESTIC WATER HEATER UPGRADE Building Number of Heaters Special Note Total Cost Electric kWh Savings Required mmBtu New Fuel Gallons Required Annual kWh Cost Savings New Annual Fuel Cost Total Cost Savings Simple Payback City Hall 1 Electric to Oil $19,626.59 2,285.70 5.72 46.74 $495.08 $145.84 $349.24 56.20 M05 - HEAT TRACE CONTROLS UPGRADE Building Number of Valves Boiler Efficiency Total Cost Electric kWh Savings Fuel mmBtu Savings Total mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh Cost Savings Annual Fuel Cost Savings Simple Payback Washeteria 3 82%$14,700.09 0.00 13.23 13.23 110.63 $0.00 $345.18 42.59 Water Treatment 3 82%$14,700.09 0.00 13.23 13.23 110.63 $0.00 $345.18 42.59 APPENDIX B EECBG PROJECT COSTS & EXPECTED SAVINGS B01 - WEATHERSTRIPPING Building # of Doors Price Per Door Total Cost Electric kWh Savings Fuel mmBtu Savings Total mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh Cost Savings Annual Equivalent Fuel Cost Savings Simple Payback Washeteria 2 $1,218.54 $2,437.08 0.00 4.95 4.95 35.34 $0.00 $110.25 22.11 E04 - PREMIUM EFFICIENCY MOTORS UPGRADE Building # of Motors Price Per Motor Total Cost Electric kWh Savings Electric kW Savings Equivalent mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh Cost Savings Annual Equivalent Fuel Cost Savings Simple Payback Water Treatment 7 Varies w/HP $56,038.91 2,905.71 0.91 9.92 210.86 $629.38 $657.90 89.04 M01 - BOILER TUNE-UP Building Number of Boilers Increase in Efficiency Total Cost Electric kWh Savings Fuel mmBtu Savings Total mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh Cost Savings Annual Equivalent Fuel Cost Savings Simple Payback Water Treatment 2 3.00%$9,758.86 0.00 946.11 946.11 6,757.94 $0.00 $21,084.76 0.46 APPENDIX B - EECBG PROJECT COSTS & EXPECTED SAVINGS - ALAKANUK Note: The reported simple paybacks are based on the type of ECO listed. For example, electrical ECOs only use the Annual kWh Cost Savings column to calculate the SPB, even though the Annual Equivalent Fuel Cost Savings is still reported. APPENDIX C EQUATIONS USED IN CALCULATIONS ECO Equations B01 1. Door Leakage Area (in2) = Door Area x Door Leakage Factor 2. Specific Infiltration (CFM/in2) = [ (Stack Coefficient x ∆T) + (Wind Coefficient x [Wind Speed]2 )]1/2 3. ∆T = Heating Setpoint Temp - Bin Temp 4. Air Infiltration (CFM) = Specific Infiltration x Door Leakage Area 5. Heat Loss Rate (Btu/hr) = 1.08 x Air Infiltration x ∆T 6. Heating Load (mmBtu) = Heat Loss Rate x Bin Hours / 1,000,000 7. Energy Savings = Baseline - Proposed Note: This ECO was completed using the RETscreen program. B02 Note: This ECO was completed using the RETscreen program. Inputs are R-values reported in the appendices as well as the insulation square footage. B03 Note: This ECO was completed using the eQuest program. Two building models were created and compared using pre- and post-install window upgrade data. B04 Note: This ECO was completed using the eQuest program. Two building models were created and compared using pre- and post-install door upgrade data. B05 Note: This ECO was completed using the RETscreen program. This calculation was completed by varying the air change rate (ac/h) in pre- and post-installation circumstances. C01 Note: This ECO is based on bin data, occupancy, heating peak loads, boiler efficiency, and an assumed night setback. Baseline Usage = (Peak Load x Occupied Load Profile x All Hours) / Boiler Eff. ECM Usage = [(Peak Load x Occupied Load Profile x Occupied Hours) + (Peak Load x Unoccupied Load Profile x Unoccupied Hours)] / Boiler Eff. mmBtu Saved = Baseline Usage - ECM Usage C02 A conservative savings of 8% was assumed for these calculations. Baseline Space Heating (MMBtu/yr) = (Energy End-Use) x (Building Area) / 1000 Energy End-Use from Tables 2A and 2B from Chapter 35 of 2003 ASHRAE Applications Handbook were utilized. Only space heating was taken into consideration. Space Heating Savings (MMBtu/yr) = (Baseline Space Heating) x [(Occupied Bin Hours)/(Total Bin Hours)] x (8% savings) E01 1. Baseline Demand (kW) = (Existing Fixture Wattage) x (Qty) X (12 Months) / (1,000) 2. Baseline Usage (kWh) = (Baseline Demand) x (Fixture Hours) 3. Proposed Demand (kW) = (Proposed Fixture Wattage) x (Qty) X (12 Months) / (1,000) 4. Proposed Usage (kWh) = (Proposed Demand) x (Fixture Hours) 5. Annual Energy Savings = (Baseline Energy Usage) - (Proposed Energy Usage) 6. Annual Cost Savings = (Energy Savings) x (Energy Cost) E02 1. Baseline Demand (kW) = (Existing Fixture Wattage) x (Qty) X (12 Months) / (1,000) 2. Baseline Usage (kWh) = (Baseline Demand) x (Fixture Hours) 3. Proposed Demand (kW) = (Proposed Fixture Wattage) x (Qty) X (12 Months) / (1,000) 4. Proposed Usage (kWh) = (Proposed Demand) x (Fixture Hours) 5. Annual Energy Savings = (Baseline Energy Usage) - (Proposed Energy Usage) 6. Annual Cost Savings = (Energy Savings) x (Energy Cost) E03 1. Baseline Usage (kWh) = (Existing Fixture Wattage) x (Qty) x (Existing Hours) / (1,000) 2. Proposed Usage (kWh) = (Existing Fixture Wattage) x (Qty) x [(Existing Hours) - (Hours Reduced)] / (1,000) 3. Annual Energy Savings = (Baseline Energy Usage) - (Proposed Energy Usage) 4. Annual Cost Savings = (Energy Savings) x (Energy Cost) E04 1. Existing/Proposed Motor Demand (kW) = (Motor HP) x (Load Factor) x (0.746 kW/HP)/ Motor Efficiency 2. Existing/Proposed Motor Consumption (kWh) = (Motor Demand) x (Diversity Factor) x (Annual Hours) 3. kW Savings = [(Baseline kW) - ( Proposed kW)] x (12 Months) 4. kWh Savings = (Baseline kWh) - ( Proposed kWh) 5. Energy Cost Savings = Energy Savings (kW or kWh) x (Energy Unit Cost) E05 1. Baseline Demand (kW) = (Existing Fixture Wattage) x (Qty) X (12 Months) / (1,000) 2. Baseline Usage (kWh) = (Baseline Demand) x (Fixture Hours) 3. Proposed Demand (kW) = (Proposed Fixture Wattage) x (Qty) X (12 Months) / (1,000) 4. Proposed Usage (kWh) = (Proposed Demand) x (Fixture Hours) 5. Annual Energy Savings = (Baseline Energy Usage) - (Proposed Energy Usage) 6. Annual Cost Savings = (Energy Savings) x (Energy Cost) APPENDIX C - EQUATIONS USED IN CALCULATIONS - ALAKANUK E06 1. Baseline Demand (kW) = (Existing Fixture Wattage) x (Qty) X (12 Months) / (1,000) 2. Baseline Usage (kWh) = (Baseline Demand) x (Fixture Hours) 3. Proposed Demand (kW) = (Proposed Fixture Wattage) x (Qty) X (12 Months) / (1,000) 4. Proposed Usage (kWh) = (Proposed Demand) x (Fixture Hours) 5. Annual Energy Savings = (Baseline Energy Usage) - (Proposed Energy Usage) 6. Annual Cost Savings = (Energy Savings) x (Energy Cost) E07 1. Baseline Demand (kW) = (Existing Fixture Wattage) x (Qty) X (12 Months) / (1,000) 2. Baseline Usage (kWh) = (Baseline Demand) x (Fixture Hours) 3. Proposed Demand (kW) = (Proposed Fixture Wattage) x (Qty) X (12 Months) / (1,000) 4. Proposed Usage (kWh) = (Proposed Demand) x (Fixture Hours) 5. Annual Energy Savings = (Baseline Energy Usage) - (Proposed Energy Usage) 6. Annual Cost Savings = (Energy Savings) x (Energy Cost) E08 1. Baseline Demand (kW) = (Existing Fixture Wattage) x (Qty) X (12 Months) / (1,000) 2. Baseline Usage (kWh) = (Baseline Demand) x (Fixture Hours) 3. Proposed Demand (kW) = (Proposed Fixture Wattage) x (Qty) X (12 Months) / (1,000) 4. Proposed Usage (kWh) = (Proposed Demand) x (Fixture Hours) 5. Annual Energy Savings = (Baseline Energy Usage) - (Proposed Energy Usage) 6. Annual Cost Savings = (Energy Savings) x (Energy Cost) M01 Savings (MBtu) = (Boiler Input Rating) x ((1/Tested Efficiency)-(1/Desired Efficiency)) x (Hours per Year) Savings ($) = (MBtu Savings) x (Energy Cost) M02 Savings (MBtu) = (Boiler Input Rating) x ((1/Old Boiler Efficiency)-(1/New Boiler Efficiency)) x (Hours per Year) Savings ($) = (MBtu Savings) x (Energy Cost) M03 STANDBY LOSS SAVINGS Surface Area of Water Heater, A = 2*PI*r^2 + 2*PI*r*h Heat Loss (Btu) = U x A x ∆T, where U is 1/R and ∆T Standby Savings (Btu) = (Existing Standy Losses) - (Proposed Standby Losses) Standby Cost Savings ($) = (Standby Savings) x (Energy Cost) WATER HEATER UPGRADE SAVINGS Annual Water Use = Ʃ((Appliance or Fixture gpm) x (Minutes of Use Per Use Per Year) x (# of Uses)) Annual Heating (Btu) = (Annual Water Use) x (8.33 lb/gal H20) x (Temp Rise ˚F) x (1 Btu/lb-˚F) Heating Savings (Btu) = (Existing Annual Heating) - (New Annual Heating) Note: Existing and New will be different due to the preheat addition with the indirect water heater. TOTAL SAVINGS Total Heating Savings (Btu) = (Standby Savings) + (Heating Savings) Total Heating Cost Savings ($) = (Total Heating Savings) x (Energy Cost) M04 Surface Area of Water Heater, A = 2*PI*r^2 + 2*PI*r*h Heat Loss (Btu) = U x A x ∆T, where U is 1/R and ∆T Standby Loss Savings = (Heat Loss) x (Energy Cost) Annual Water Use = Ʃ((Fixture gpm) x (Minutes of Use Per Use Per Year) x (# of Uses)) Annual Heating (Btu) = (Annual Water Use) x (8.33 lb/gal H20) x (Temp Rise ˚F) x (1 Btu/lb-˚F) Total Existing Heating, kWh = (Annual Heating + Standby Losses) / ((Old Heater Efficiency) x 3413 Btu/kWh) kWh Cost ($) = Conversion x Energy Cost Proposed Heating (Btu) = (Annual Heating) / (New Heater Efficiency) Proposed Heating Cost = (Proposed Heating ) x Energy Cost Savings ($) = (kWh Cost) - (Proposed Heating Cost) M05 Mass of Water (lbm/gal) = (Weight of Water, 8.33 lb/gallon) / (32.2 ft/s^2) Mass Flow of Water, mdot (lbm/hr) = (Mass of Water) x (Water gpm) x (60min/hr) Heat Transfer to Water (Btu/hr) = mdot x cp x Δt = mdot x (1 Btu/lb-˚F) x (Water Out - Water In, ˚F) Annual Heat Transfer (Btu) = (Heat Transfer to Water) x (Annual Unnecessary Heating Hours) Cost Savings = (Annual Heat Transfer) x (Energy Cost) Building Characteristics Space Heat Cool Ventilation Education 32.8 4.8 1.6 Food sales 27.5 13.4 4.4 Food service 30.9 19.5 5.3 Health care 55.2 9.9 7.2 Lodging 22.7 8.1 1.7 Mercantile and service 30.6 5.8 2.5 Office 24.3 9.1 5.2 Public assembly 53.6 6.3 3.5 Public order and safety 27.8 6.1 2.3 Religious worship 23.7 1.9 0.9 Storage/Warehouse 15.7 0.9 0.3 Vacant 11.9 0.6 0.3 From the Energy Management Handbook, Turner, 4th Edition Table 13.8 p361 Savings from installing occupancy sensors are as follows: Offices (Private) 25-50% Offices (Open Spaces) 20-25% Rest Rooms 30-75% Corridors 30-40% Storage Areas 45-65% Meeting Rooms 45-65% Conference Rooms 45-65% Warehouses 50-75% FOR E04 Load factor assumed to be 80% except in some cases. Vacuum pumps assumed 100% load factor. Diversity factor assumed to be 95%. FOR E03 - Hours Reduced Tables 2A and 2B - 1995 Commercial Building Energy Consumption 2003 ASHRAE Applications Handbook, Chapter 35 Energy End-Use (1,000 Btu/ft2-yr) FOR C02 APPENDIX D POST INSTALLATION PHOTOS APPENDIX D – POST INSTALLATION PHOTOS - ALAKANUK LED Lighting Exchange – Village Energy Efficiency Fair LED Street Light Installation Exterior Lighting Upgrade Boiler Burner Control