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Home My WebLink AboutEmmonak 2012-VEEP ENERGY AUDIT FINAL POST INSTALLATION REPORT Results and Recommendations from Energy Audit of Emmonak For EECBG and VEEP Grants City of Emmonak, Alaska July 23, 2012 Prepared By: Prepared For: Ameresco, Inc. 6643 Brayton Drive Anchorage, AK 99507 Alaska Energy Authority City of Emmonak Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page i Emmonak, AK TABLE OF CONTENTS EXECUTIVE SUMMARY AND PREFACE .................................................................................. 1 1.1 EMMONAK SCHOOL ................................................................................................ 3 1.2 EMMONAK CITY HALL, HOTEL, AND COMMUNITY CENTER ......................................... 6 1.3 EMMONAK W ASHETERIA ......................................................................................... 9 1.4 EMMONAK POLICE DEPARTMENT (ALASKA COURT SYSTEM) ................................... 12 1.5 EMMONAK W ATER TREATMENT PLANT .................................................................. 15 1.6 OTHER EMMONAK BUILDINGS SURVEYED .............................................................. 18 2.0 UTILITIES ..................................................................................................................... 21 2.1 ELECTRICITY ....................................................................................................... 21 2.1.1 Electricity Usage Profiles ........................................................................22 2.2 FUEL ................................................................................................................... 26 3.0 OPERATIONS/MAINTENANCE PRACTICES .............................................................. 27 4.0 WHOLE VILLAGE AUDIT INITIATIVES - PROPOSED ................................................. 27 4.1 LIGHTING EXCHANGE PROGRAM ........................................................................... 27 5.0 ENERGY CONSERVATION OPPORTUNITIES ............................................................ 28 5.1 ECO DESCRIPTIONS – PROPOSED ....................................................................... 30 5.1.1 Building Envelope Opportunities .............................................................30 5.1.2 Controls Opportunities ............................................................................30 5.1.3 Electrical Opportunities ...........................................................................31 5.1.4 Mechanical Opportunities .......................................................................32 6.0 FINAL COSTING AND CHANGES FROM INITIAL REPORTING .................................. 34 6.1 CHANGES FROM INITIAL REPORTING – W HOLE VILLAGE (APPENDIX A) .................... 34 6.2 CHANGES FROM INITIAL REPORTING – VEEP (APPENDIX B) ................................... 35 6.3 CHANGES FROM INITIAL REPORTING – EECBG (APPENDIX C) ................................ 35 6.3 FUNDING ALLOCATION SUMMARY TABLES ............................................................. 36 APPENDICES APPENDIX A – WHOLE VILLAGE PROJECT COSTS & EXPECTED SAVINGS ................... A-1 APPENDIX B – VEEP PROJECT COSTS & EXPECTED SAVINGS ...................................... B-1 APPENDIX C – EECBG PROJECT COSTS & EXPECTED SAVINGS ................................... C-1 APPENDIX D – EQUATIONS USED IN CALCULATIONS ...................................................... D-1 APPENDIX E – POST INSTALLATION PHOTOS ................................................................... E-1 Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 1 Emmonak, AK EXECUTIVE SUMMARY AND PREFACE This Final Post Installation Report summarizes the results of an Ameresco Energy Audit of the City of Emmonak, the initial energy savings measures identified and proposed, and any changes that may have occurred throughout the installation process. The City of Emmonak is a recipient of an Alaska Energy Authority (AEA) Village Energy Efficiency Program (VEEP) grant of $150,000, an Energy Efficiency and Conservation Block Grant (EECBG) of $72,100, and a Whole Village Energy Efficiency Retrofit audit of $400,000. Ameresco engineers conducted an energy audit of the City of Emmonak on October 18-19, 2010. The table below shows the buildings audited and their respective square footages. City of Emmonak - Building Summary Building Category Square Footage School School 20,000 City Hall, Hotel, and Community Center Public Building 4,210 Washeteria Public Building 2,800 Police Department Public Building 2,400 Waste Water Treatment Plant Public Facility 4,500 Chuloonawick Native Village Office Public Building 2,400 Public Works Public Facility 2,400 Power Plant Public Facility N/A 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). Options for advanced electric meter systems were considered if they did not already exist. Ameresco also explored opportunities for on-site energy production, both non-renewable and renewable. The following table shows the results of Ameresco’s audit and potential calculation savings, allocated by grant. See Appendix A, Appendix B, and Appendix C 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 Emmonak Page 2 Emmonak, AK WHOLE VILLAGE - PROJECT COSTS & EXPECTED SAVINGS - EMMONAK ECO Cost Savings SPB B01 - WEATHER-STRIPPING UPGRADE $ 6,108.66 $ 827.38 7.38 B02 - THERMAL INSULATION UPGRADE $ 43,691.97 $ 1,540.43 28.36 B03 - ENERGY EFFICIENT DOOR UPGRADE $ 13,771.29 $ 900.85 15.29 B04 - INSULATED FLOOR $ 15,762.97 N/A N/A B06 - ROOF UPGRADE $ 305,364.05 $ 3,373.67 90.51 C01 - CONTROLS UPGRADE $ 14,099.27 $ 17,133.47 0.82 E02 - T5 LIGHTING UPGRADE $ 33,757.31 $ 1,365.75 24.72 E05 - LED LIGHTING UPGRADE $ 25,061.95 $ 1,769.27 14.17 M01 - BOILER TUNE-UP $ 19,413.64 $ 24,780.28 0.78 M02 - BOILER UPGRADE $ 37,102.00 $ 2,605.98 14.24 M03 - DOMESTIC WATER HEATER UPGRADE $ 8,070.48 $ 555.48 14.53 TOTAL PROJECT COST $ 522,203.59 $ 54,852.57 9.52 TOTAL WHOLE VILLAGE GRANT $ 400,000.00 REALLOCATED FROM EMMONAK VEEP FUNDS $ 74,344.94 BUDGET EXCEEDED $ (47,858.65) VEEP - PROJECT COSTS & EXPECTED SAVINGS - EMMONAK ECO Cost Savings SPB E01 - T8 LIGHTING UPGRADE $ 62,277.70 $ 13,563.13 4.59 E03 - INSTALL OCCUPANCY SENSORS $ 13,377.35 $ 7,858.48 1.70 AVAILABLE FUNDING $ 74,344.94 *Available funding has been allocated to the Whole Village scope. TOTAL PROJECT COST $ 75,655.06 $ 21,421.61 3.53 TOTAL GRANT $ 150,000.00 EECBG - PROJECT COSTS & EXPECTED SAVINGS - EMMONAK ECO Cost Savings SPB B05 - ENERGY EFFICIENT WINDOW UPGRADE $ 22,313.78 $ 200.13 111.49 C02 - PROGRAMMABLE THERMOSTATS $ 4,155.94 $ 9,405.35 0.44 E04 - PREMIUM EFFICIENCY MOTORS UPGRADE $ 36,453.86 $ 1,082.54 33.67 M04 - PIPING INSULATION $ 2,230.83 $ 2,213.87 1.01 M05 - UNIT HEATER UPGRADE $ 6,897.50 $ 793.64 8.69 AVAILABLE FUNDING $ 48.09 *Remaining funding at this site will be considered as available funding on future EECBG projects within the contract. TOTAL $ 72,100.00 $ 13,695.54 5.26 Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 3 Emmonak, AK 1.0 Building Descriptions 1.1 EMMONAK SCHOOL Description: The Emmonak School is a combination elementary, middle school, and high school building. The building space is a combination of classroom, office, library, gymnasium, and cafeteria space. Emmonak School caters to about 230 students and 30 staff members. The school is one of the best maintained buildings in the city, though many opportunities exist for improvement. General Conditions: The building is comprised of two sections. The section of the building that currently contains the high school and gymnasium was the original school building. An addition was later built that currently houses the administrative offices, elementary, middle school, and cafeteria. The building appears to be in good condition, though there were several areas for improvement noticed throughout the audit. Pictures of general conditions found during the field audit immediately follow this building description. Building Envelope: The building structure overall appears to be in good condition. The double-pane clear glass windows are in excellent condition. Doors are insulated aluminum frame; most weather- stripping appears adequate, though some doors require weather-stripping repair or replacement. The roof is constructed from angled standing seam metal and appears to be in good condition. The building exterior walls are covered in standing seam metal; the newer portion of the building appears to be in excellent condition, while the older section of the building is showing signs of weathering. The walls appear to have about 6 inches of batt insulation and an inch of rigid insulation. Air Distribution: A Trane makeup air unit (MAU) from 1991 handles the air distribution needs of the newer section of the building. This MAU is a Modular Climate Changer and provides 3240 cubic feet per Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 4 Emmonak, AK minute (cfm) or air to the building. The High School section was initially designed to be heated with multiple oil-fired hot air furnaces located in the crawl space below the roof. Over time, all but one furnace has been parted out to keep the heat on in the section. The unit has been pieced together so many times that it was impossible to determine the actual make and model of the equipment at the time of the audit. During Ameresco’s visit, auditors found that the unit never shuts down, which is reflected in the oil bills received by the school system. Heating: Two Weil-McLain fuel oil model 88 boilers provide heating to the building. These boilers are listed as 84% efficient. A combustion analysis found these boilers to be performing at 79% efficiency. Controls: The building does not currently have a direct digital control (DDC) energy management control system (EMCS). The Trane MAU has a Square D electronic controller. Building zone temperatures are controlled by digital thermostats. Lighting: Interior lighting consists primarily of T12 fluorescent lamps with magnetic ballasts. The gym contains metal halide (MH) fixtures that appear to be about 200 watts. In the lobby, there are compact fluorescent (CFL) fixtures in addition to the T12 lighting. The cafeteria area contains MH fixtures that appear to be 200-250 watts in size. In the computer lab area, there are a series of what appears to be recessed mini bi-pin halogen lighting. Exterior lighting consists of high pressure sodium (HPS) fixtures. There are no occupancy sensors in the building. Domestic Water: There are two domestic water heaters at the school for the provision of hot water. The first, located in the school’s exterior mechanical room, is a Bock 68 gallon fuel-oil domestic water heater (installed at an unknown date). This boiler has a significant dent at the base, but it does not appear to be leaking. The second, located in interior mechanical room above the gym, is a Rheem 120 gallon electric water heater (manufactured December 2009). Lavatory faucets range from 1.5 to 4 gpm, and toilets range from 1.6 gpf to 3 gpf. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 5 Emmonak, AK Building Photos: Emmonak School Weil-McLain Boilers Bock Domestic Hot Water Heater Trane Makeup Air Unit Filters in Need of Replacement New Rheem Domestic Water Heater Missing Weather-stripping – Leaky Doors Missing Weather-stripping High School Exterior Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 6 Emmonak, AK 1.2 EMMONAK CITY HALL, HOTEL, AND COMMUNITY CENTER Description: The City Hall building in Emmonak is a multi-functional building that also houses the community center and City Hotel. The building has seen some wear and weathering over the years, but is holding up well. This building also sees much activity due to the busy nature of the office as well as almost daily use for evening gatherings in the community center portion of the building. General Conditions: The structure overall is in fair condition, though it seems to still be holding up adequately. The exterior shows many signs of weathering and age, but it does not appear to be seriously compromised in any fashion. Some windows are boarded up, and there are some areas where the building façade is damaged and insulation is visible, but does not appear to be overly deteriorated. The condition of the HVAC equipment is in poor condition, though some is under repair. Pictures of general conditions found during the field audit immediately follow this building description. Building Envelope: The structure itself has many flaws, though most of these appear to be cosmetic in nature. The exterior of the building is covered in plywood that is showing age and weathering. The roof is standing seam metal and appears to still be in good condition with some batt insulation above the ceiling. The windows are double-pane clear glass and are in fair condition. The windows that are untouched by vandalism are in excellent condition, but many of the windows have one or more of their panes cracked or broken. Some have been covered by plexiglass because of the vandalism issues. Others have been boarded up completely. One window is closed off using Styrofoam and aluminum foil. Doors are aluminum frame and appear to be in good condition. Heating: Two Weil-McLain boilers located in the building’s mechanical room provide heating. One is currently inoperable and is under repair, so the remaining boiler is forced to supply the entire building’s Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 7 Emmonak, AK heat. The age of these boilers is unknown, but based on product literature, they were probably manufactured in the mid-1990s. According to a product brochure, these boilers were 82-84% efficient at time of manufacture. A combustion analysis found the functional boiler to be 78% efficient. Controls: The heating of building zones 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 fixtures that have been retrofitted with T8 lamps. These fixtures, however, are still not as efficient as desired because they are still operating on magnetic ballasts and will severely impact the life of the bulb. There are a few 75 watt incandescent fixtures throughout the facility as well. There are no occupancy sensors in the building. Domestic Water: A 50 gallon Bock fuel oil fired domestic water heater provides hot water to the building. This size domestic water heater is a residential model with an energy factor of 0.66 and a recovery efficiency of 80%. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 8 Emmonak, AK Building Photos: Emmonak City Hall, Hotel, and Community Center Typical Cracked Window Boiler Under Repair Debris in Boiler Flue Boiler Stack and Mechanical Room Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 9 Emmonak, AK 1.3 EMMONAK WASHETERIA Description: The Emmonak Washeteria is used by most of the villagers for their laundering needs. The building is open 3 days each week to accommodate the needs of the villagers. There are also men’s and women’s saunas and showers located in the facility. General Conditions: The building structurally appears to be kept in good condition. The interior spaces, however, are excessively overheated. The building is so hot, that villagers usually keep the front door and windows open while doing laundry to make the environment bearable. There are many reasons for the high temperature of the facility, from lack of dryer heat exchanger control to non-functioning room control. The village no longer utilizes the sauna heaters, as the space is now heated with the building system and kept over 110°F. During the audit, the women’s sauna temperature reading was found to be 124°F. The dryers are on continuous heat loops, which create excess heat in an already overheated interior space. The only comfortable room in the facility is one which houses an HRV, yet appears to be used only for storage. This facility is ripe with opportunities for energy improvements. Pictures of general conditions found during the field audit immediately follow this building description. Building Envelope: The building exterior is covered in brown and blue plywood that appears to be in good condition; it shows little signs of weathering or wear. The angled standing seam metal roof appears to be in good condition as well. The double pane clear glass windows are in excellent condition and are well sealed. The doors are in good condition as well, although they could use new weather-stripping. Heating: Two Weil-McLain Model 80 boilers provide the building with heating, along with 5 unit heaters (1 in the mechanical room and 4 in the crawl space below the building) and one heat recovery ventilator (HRV). One boiler is a 6-section unit, while the other is a 4-section unit. The 6-section unit runs continuously, while the 4-section unit has been manually turned off. In discussions with site maintenance personnel, Ameresco engineers were told that the smaller boiler is turned on once the temperature drops, as they cannot maintain the high building temperatures. During mild conditions, such as those encountered during the audit (38 deg.F day/ 28 deg. F night), the opposite operational sequence is Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 10 Emmonak, AK expected. A combustion analysis of the boilers found them to be 82% efficient. The Fantech HRV is located in a side room across the building from the mechanical room and was set to a medium airflow rate at the time of the audit. Four air vents located throughout the building tie into the ductwork of this HRV unit. A mechanical thermostat is also located in this side room; the thermostat was set to 70 degrees at the time of the audit, but the temperature reading was found to be well over 80 degrees due to the excess heat in the building. Four Beacon Morris unit heaters rated at 900 cfm heat the crawl space beneath the building. These heaters are tied into a single mechanical thermostat set to 60 degrees and appear to be functioning normally. Controls: The boilers are equipped with Tekmar four-stage boiler controls, but they have been overridden. Because the boilers are being used to heat the sauna areas, the mechanical thermostats located throughout the building are not functioning as designed. Lighting: Interior lighting is primarily T8 fluorescent with electronic ballasts. The crawl space is lit with 75 watt incandescent fixtures. There are no occupancy sensors in the building. Domestic Water: Two large, relatively new WHS-series Amtrol BoilerMate indirect-fired water heaters provide the building with domestic hot water. One water heater holds 60 gallons, while the other holds 80 gallons. Laundry Equipment: There are a total of 7 Continental Girbau washers (40-pound) and 10 Huebsch dryers (actually 5 units, where each unit has 2 dryers, 30-pound capacity) located in the Emmonak Washeteria. The washers currently meet ENERGY STAR performance requirements. The Continental Girbau washers have a modified energy factor (MEF) of 1.96 and a water factor (WF) of 5.04. Current ENERGY STAR requirements stipulate a MEF of 1.8 or greater and a WF of 7.5 or less. In January of 2011, however, the requirements will change to a MEF of 2.0 or greater and a WF of 6.0 or less. ENERGY STAR does not currently offer a label for clothes dryers because most models use similar amount of energy. Because the Huebsch dryers are relatively new, they are most likely on the same efficiency level as other commercial dryers on the market. These dryers, however, are currently consuming a large amount of energy because they are not being properly controlled. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 11 Emmonak, AK Building Photos: Emmonak Washeteria Fantech HRV Amtrol Boilermate Indirect Water Heaters Weil-McLain 480 Model Boiler Weil-McLain 680 Model Boiler Huebsch Dryers – Constantly Heated Continental Girbau Washer Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 12 Emmonak, AK 1.4 EMMONAK POLICE DEPARTMENT (ALASKA COURT SYSTEM) Description: The Emmonak Police Department building houses the police department offices, the jailhouse, and the courtroom. Emmonak Court operates Monday through Friday, 8 am to noon, and 1 pm to 4:30 pm. General Conditions: Structurally, the building appears to be in good condition, with a few cosmetic flaws. The building is riddled with mechanical thermostats, but only one appears to be working at this time. The heating system is in need of maintenance and repair. The facility overall, however, appears to be in usable condition. Pictures of general conditions found during the field audit immediately follow this building description. Building Envelope: The building has a plywood exterior that is in good condition and shows few signs of weathering and age. The angled standing seam metal roof is in good condition. According to occupants, the building is 30-40 years old, but it appears to be in fair condition for that age. The double pane clear glass windows are in good condition. Exterior doors do not close properly and are in need of new weather-stripping. Heating: Two oil fired Weil-McLain boilers provide the building with heating, though they are not operating effectively at this time. A combustion analysis was performed on both of these boilers. One boiler was found to have a combustion efficiency of 81.1%. The second boiler was found to have a combustion efficiency of 80.2%, with high carbon monoxide levels. The combustion efficiency will increase with increased excess air, until the heat loss in the excess air is larger than the heat provided by more efficient combustion. When fuel and oxygen in the air are in perfect balance, the combustion is said to be stoichiometric. Proper maintenance and system calibration will increase and maintain higher efficiency levels and reduce operating costs. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 13 Emmonak, AK Upon further investigation, Ameresco found this particular model of Weil-McLain boiler to be discontinued. Because these boilers and associated systems are functioning so ineffectively, two electric room heaters are used to keep the building warm. According to occupants, the electric heaters cannot overcome the colder temperatures experienced during the winter, and the building becomes exceedingly cold during these months, especially in the jailhouse. Controls: The building appears to be set up for 3 heating zones with mechanical thermostats. As previously stated, however, these zones have gone through extensive re-design over the years and are no longer functioning properly. The building also has constant problems with air being introduced into the system that the system circulators cannot overcome becoming air locked. Air pockets in the piping system can function as blockages to stop flow and at one time causing a freeze up of the facility. Lighting: Interior lighting is a mixture of T12 fluorescent fixtures and T8 fluorescent fixtures, all with magnetic ballasts. There are no occupancy sensors in the system. Domestic Water: An Ariston point-of-use 4 gallon electric water heater has replaced the now-defunct Bock domestic water heater. This Ariston water heater appears to be fairly new and is in good condition. The plumbing fixtures in the jailhouse are no longer operational, so prisoners must be escorted out of their cells to use the restroom. The water heater currently meets the requirements of the limited fixtures. Should the restrooms be repaired, the domestic hot water system will need to be revised. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 14 Emmonak, AK Building Photos: Emmonak Police Department Old Weil-McLain Boilers Ariston Domestic Water Heater Oil-Filled Heater (for Courtroom) Lasko Electric Heater (for Jailhouse) Controls Box Containing Relays Deteriorating Piping Insulation Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 15 Emmonak, AK 1.5 EMMONAK WATER TREATMENT PLANT Description: The Emmonak Water Treatment Plant provides clean water to the entire city. The plant has a single operator, but receives extra maintenance help when needed. The building is in good condition. Most of the equipment housed at the facility has been well-maintained, though there are several outdated pumps and motors that could be replaced with more efficient models. General Conditions: The water treatment plant is in good condition overall. All of the mechanical equipment has been kept in good condition, even though some the HVAC is somewhat dated. No major defects were noticed during the audit walkthrough. Pictures of general conditions found during the field audit immediately follow this building description. Building Envelope: The building’s exterior plywood façade is in good condition and shows few signs of weathering or age. The standing seam metal roof is in good condition. The double pane windows have also been kept in good condition as well. Doors are insulated aluminum frame, and weather-stripping is adequate. Heating: Two oil-fired Weil-McLain Model 688 Series 3 boilers provide the building with heating; heat is also added from the power plant. A combustion analysis was performed and found the boilers to be 80.1% efficient. One of the boilers, however, constantly drifts out of combustion requirements, as the burner oxygen linkage is damaged and currently held together by bail wire. These boilers are also discontinued Weil-McLain models. Controls: This building is not controlled by a DDC EMCS system. Zones are controlled by mechanical thermostats located throughout the facility. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 16 Emmonak, AK Lighting: The building is primarily lit by high-intensity discharge (HID) 250 watt MH fixtures. Twenty- six of these fixtures are dispersed throughout the facility. Domestic Water: The water treatment plant houses many pumps and motors of varying ages and efficiencies. Opportunities exist here for more efficient replacements. Vacuum System: 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 System: 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. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 17 Emmonak, AK Building Photos: Emmonak Water Treatment Plant Water Treatment Plant Boiler Furnace – Missing Linkage Boiler Room – Missing Insulation Water Treatment Pumps Vacuum Pumps Circulating Pumps Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 18 Emmonak, AK 1.6 OTHER EMMONAK BUILDINGS SURVEYED Chuloonawick Native Village Office: The Chuloonawick Native Village office in Emmonak is in fair condition. Some of the windows have been boarded up, but the remaining windows (with the exception of one broken one) are in good condition. The building exterior and roof are still in good condition. The doors seal adequately when closed. A Toyo stove space heater is used to heat the building. There is a non-function LifeBreath heat exchange ventilator in a side room. If this ventilator were to be repaired, it would greatly improve the building’s interior comfort level. Lighting has already been retrofit to T8 lamps with electronic ballasts. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 19 Emmonak, AK Public Works: The Public Works building is a pre-fabricated steel frame building with deteriorating insulation constructed on a dirt base. All of the doors are extremely leaky, and there are many areas of insulation that have become damaged and are no longer adequate. A scavenged Modine unit heater provides some space heating. Lighting to the main work bay is provided by 4,250 watt HPS hanging fixtures. The office area is lit by two T12 fluorescent fixtures with magnetic ballasts. Emmonak Power Plant: The Emmonak power plant is under the authority of the Alaskan Village Electric Cooperative (AVEC). A lighting retrofit opportunity exists here, as there are 20 T12 fixtures lighting the various buildings. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 20 Emmonak, AK Building Photos: Other Emmonak Buildings Surveyed Chuloonawick – Heat Exchange Ventilator Chuloonawick – Toyostove Heater Public Works – Scavenged Modine Heater Public Works – Doors Do Not Seal Power Plant - Lighting Power Plant – Heat Exchanger for Jacket Water Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 21 Emmonak, AK 2.0 UTILITIES 2.1 ELECTRICITY The City of Emmonak 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 Emmonak are listed below. AVEC Cost of Fuel (Added to Customer Electric Bill) $ 0.2206 Rate Per kWh, Fuel Cost Included (1-700 kWh) $ 0.5206 Rate Per kWh, Fuel Cost Included (Over 700 kWh) $ 0.4206 PCE Rate (1-700 kWh) $ 0.3057 PCE Rate (Over 700 kWh) $ 0.2767 The following buildings currently receive PCE funding: Emmonak Washeteria Emmonak Police Department (Alaska Court System) Emmonak Water Treatment Plant Chuloonawick Native Village Office Public Works Building Emmonak Power Plant The Emmonak City Hall, Hotel, and Community Center building does not receive a monthly PCE credit at this time. The Lower Yukon School District has its own agreement with AVEC, and, like the City Hall building, does not receive PCE funding. The AVEC rates for the Emmonak School are listed below. AVEC Average Cost of Fuel $ 0.2078 Rate Per kW $ 45.00 Rate Per kWh, Fuel Cost Included (1-1,500 kWh) $ 0.3278 Rate Per kWh, Fuel Cost Included (Over 1,500 kWh) $ 0.2478 Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 22 Emmonak, AK 2.1.1 Electricity Usage Profiles Emmonak Community Center & Hotel Estimated Electric Usage 0 500 1000 1500 2000 2500 3000 3500 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 Emmonak Washeteria 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 Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 23 Emmonak, AK Emmonak Police Department Estimated Electric Usage 0 500 1000 1500 2000 2500 3000 3500 4000 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 Emmonak Water Treatment Plant Estimated Electric Usage 0 5000 10000 15000 20000 25000 30000 35000 40000 45000 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 Emmonak Page 24 Emmonak, AK Chuloonawick Estimated Electric Usage 0 100 200 300 400 500 600 700 800 900 1000 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 Emmonak City Shop Estimated Electric Usage 0 200 400 600 800 1000 1200 1400 1600 1800 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 Emmonak Page 25 Emmonak, AK School Electric Usage (kWh) 0 5000 10000 15000 20000 25000 30000 35000 Oct- 09 Nov- 09 Dec- 09 Jan- 10 Feb- 10 Mar- 10 Apr- 10 May- 10 Jun- 10 Jul-10 Aug- 10 Sep- 10kWh School Electric Demand (kW) 80 85 90 95 100 105 110 Oct- 09 Nov- 09 Dec- 09 Jan- 10 Feb- 10 Mar- 10 Apr- 10 May- 10 Jun- 10 Jul-10 Aug- 10 Sep- 10kW Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 26 Emmonak, AK 2.2 FUEL The City of Emmonak purchases its fuel from Delta Western, Inc. Delta Western provides both diesel fuel as well as gasoline to the city in two bulk shipments each year. The rates paid for each fuel type are listed below. Diesel (June 2010) $ 3.4001 Gasoline (June 2010) $ 3.5836 Diesel (September 2010) $ 3.4317 The Chuloonawick Native Village office pays the Emmonak Corporation for fuel at a rate of $5.00/gallon. Chuloonawick purchases stove oil from the Emmonak Corporation every 2 to 3 months. The Emmonak 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 Emmonak Page 27 Emmonak, AK 3.0 OPERATIONS/MAINTENANCE PRACTICES 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 training or experience 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. 4.0 WHOLE VILLAGE AUDIT INITIATIVES - PROPOSED Section 4 details opportunities for the City of Emmonak’s Whole Village Energy Efficiency Retrofit granted by the Alaska Energy Authority. See Appendix B for calculation results pertaining to Whole Village Initiatives. 4.1 LIGHTING EXCHANGE PROGRAM Ameresco proposes a lighting exchange program that will encompasses all village buildings. Since fixtures in village building are incandescent, Ameresco proposes to send a pre-determined number of 7- watt LED lights to be exchanged for incandescent bulbs from village buildings. This program, if instituted, will decrease energy usage and costs for lighting for all buildings that take advantage of this program. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 28 Emmonak, AK 5.0 ENERGY CONSERVATION OPPORTUNITIES The ECO matrix below summarizes the energy conservation opportunities identified 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 Emmonak 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 EMMONAK School City Hall Washeteria Police Dept Water Treatment Chuloonawick Public Works Power Plant Whole Village Building Envelope B01 Door Weather-stripping Upgrade X X X B02 Insulation Upgrade X X X B03 Energy Efficient Door Upgrade X B04 Insulated Floor X B05 Energy Efficient Window Upgrade X Controls C01 Controls Upgrade X X X C02 Thermostat Upgrade X X C03 System Flow Control X X Electrical E01 T-8 Lighting Upgrade X X X E02 T-5 Lighting Upgrade X X E03 Occupancy Sensors X X X X X E04 Premium Efficiency Motors X E05 LED Lighting Upgrade X Mechanical M01 Boiler Tune-Up X X X X X M02 Boiler Upgrade X M03 DHW Upgrade X M04 Piping Insulation X X M05 Unit Heater Upgrade X Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 29 Emmonak, AK VEEP - INITIAL PROPOSAL (FINAL AUDIT REPORT) ECO Cost Savings SPB B01 - WEATHERSTRIPPING $ 8,624.00 $ 827.38 10.42 E01 - T8 LIGHTING UPGRADE $ 116,454.52 $ 13,673.75 8.52 E03 - INSTALL OCCUPANCY SENSORS $ 16,500.00 $ 15,689.88 1.05 DESIGN $ 8,000.00 N/A N/A AVAILABLE FUNDING $ 421.48 * Available funding allocated for travel expenses, shipping, additional labor, etc TOTAL $ 150,000.00 $ 30,191.02 4.97 WHOLE VILLAGE - INITIAL PROPOSAL (FINAL AUDIT REPORT) ECO Cost Savings SPB B02 - THERMAL INSULATION UPGRADE $ 29,760.00 $ 2,275.31 13.08 B04 - INSULATED FLOOR $ 157,640.00 $ 900.85 174.99 C01 - CONTROLS UPGRADE $ 85,876.00 $ 21,028.34 4.08 C02 - PROGRAMMABLE THERMOSTATS $ 1,218.00 $ 11,732.79 0.10 C03 - SYSTEM FLOW CONTROL $ 15,960.00 $ 160.63 99.36 E02 - T5 LIGHTING UPGRADE $ 9,515.00 $ 1,225.01 7.77 E05 - LED LIGHTING UPGRADE $ 20,400.00 $ 1,436.40 14.20 M01 - BOILER TUNE-UP $ 18,900.00 $ 69,851.93 0.27 M02 - BOILER UPGRADE $ 42,000.00 $ 13,185.08 3.19 M03 - DOMESTIC WATER HEATER UPGRADE* $ - $ 555.48 0.00 AVAILABLE FUNDING $ 18,731.00 TOTAL $ 400,000.00 $ 122,351.83 3.27 EECBG - INITIAL PROPOSAL (FINAL AUDIT REPORT) ECO Cost Savings SPB B03 - ENERGY EFFICIENT DOOR UPGRADE $ 16,800.00 $ 900.85 18.65 B05 - ENERGY EFFICIENT WINDOW UPGRADE $ 9,458.25 $ 200.13 47.26 E04 - PREMIUM EFFICIENCY MOTORS UPGRADE $ 17,556.00 $ 1,171.83 14.98 M04 - PIPING INSULATION $ 1,820.00 $ 2,213.87 0.82 M05 - UNIT HEATER UPGRADE $ 10,080.00 $ 793.64 12.70 DESIGN $ 14,100.00 N/A N/A AVAILABLE FUNDING $ 2,285.75 TOTAL $ 72,100.00 $ 5,280.33 13.65 * M03 is bundled with M02, therefore there is no cost applied to this ECO although the savings are broken out. See Section 5.1.4 for more details. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 30 Emmonak, AK 5.1 ECO DESCRIPTIONS – PROPOSED Below are the descriptions of the Energy Conservation Opportunities (ECOs) that Ameresco analyzed for the Village of Emmonak. These include Ameresco’s initial project recommendations for the village. 5.1.1 Building Envelope Opportunities 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). B03 – 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. B04 – Insulated Floor Upgrade This ECO proposes installing an insulated floor in the Emmonak Public Works building. The structure currently resides on a dirt floor, which allows much of the building’s heating to escape. An insulated floor would prevent the majority of this energy from escaping and would in turn greatly lower the building’s fuel usage. B05 – 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. 5.1.2 Controls Opportunities C01 – Controls Upgrade This ECO proposes installing or repairing existing control systems to effectively minimize energy demand and consumption. A properly operational control system will also result in O&M savings, improved comfort, and energy savings. In many cases, this ECO also includes installing programmable thermostats in village buildings to ensure proper HVAC scheduling. This ECO also encompasses the dryer heating system in the Emmonak Washeteria. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 31 Emmonak, AK C02 – 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. Projects identified include the Police Department’s building heating system and the heat trace system at the Water Treatment Plant. 5.1.3 Electrical Opportunities 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 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 Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 32 Emmonak, AK operating with inefficient motors throughout the base. Premium efficiency motors typically increase energy efficiency by 2-3%. E05 – LED Lighting Upgrade See Section 4.3. 5.1.4 Mechanical Opportunities 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. M03 – Domestic Hot Water Heater Upgrade This ECO proposes replacing the current inefficient fuel oil burning domestic water heaters (DWHs) with more efficient electric models. Because the cost of fuel is so high in Emmonak, the cost-saving potential in fuel oil vs. electric is quite high. From the consumer’s view, this ECO generates enough savings to merit installation. When considering the cost of generating electricity to run the new DWHs, however, this ECO is no longer viable unless an old DWH is already in need of replacement. Because of this high cost of producing electricity, this ECO is no longer viable for the Emmonak School. In the case of the Emmonak City Hall, Hotel, and Community Center, however, this ECO has been tied together with M02. The current domestic water heater at the City Hall will be demolished and a storage tank will be included in the boiler upgrade to the building. M03 in Appendix A, therefore, reflects only the savings of no longer running a stand-alone domestic water heater. The installation costs for the storage tank have been included in the pricing of M02 in Appendix B. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 33 Emmonak, AK M04 – Piping Insulation Un-insulated or poorly insulated hot water pipes and result in unnecessary heat gain/loss and lead to longer runs times for boilers. This ECO proposes to add insulation where it is non-existent or to replace damaged insulation. M05 – Unit Heater Upgrade Ameresco proposed to install a new fuel oil unit heater at the city Public Works building and eliminate the currently installed model. The current fuel oil burner is a Modine model POR145B with a heating capacity of 145MBH. The burner has a hand-written install date of 1999, but occupants informed Ameresco that this particular heater had been scavenged for the Public Works building at another date, so this install date is inaccurate. A more efficient Reznor model has been chosen as the replacement. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 34 Emmonak, AK 6.0 FINAL COSTING AND CHANGES FROM INITIAL REPORTING 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, Appendix B, and Appendix C. 6.1 CHANGES FROM INITIAL REPORTING – WHOLE VILLAGE (APPENDIX A) B01 – Weather-stripping Installed as planned. B02 – Thermal Insulation Upgrade Newly added ECO. Completed in the Chuloonawick Native Village Office and Public Works building. B03 – Energy Efficient Door Upgrade Two of the three originally proposed doors were installed as planned. B04 – Insulated Floor Upgrade ECO removed from scope. GDM engineers completed the design drawings, but there was not enough available funding to complete the project. B05 – Energy Efficient Window Upgrade Removed from the Whole Village scope. This ECO has been completed under the EECBG scope. B06 – Roof Upgrade Newly added ECO. Completed in the City Hall building. C01 – Controls Upgrade Completed as planned. C02 – Programmable Thermostat Upgrade Removed from the Whole Village scope. This ECO has been completed under the EECBG scope. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 35 Emmonak, AK C03 – System Flow Control Removed. This ECO was completed under the scope of C01. E02 – T5 Lighting Upgrade Installed as planned. E05 – LED Lighting Upgrade Completed as planned. The Alaska Housing Craftsman Program distributed 600 LED light bulbs during a Village Energy Efficiency Fair. M01 – Boiler Tune-Up Completed as planned in all buildings except for the City Hall. The boilers in the City Hall were replaced instead under the scope of M02. M02 – Boiler Upgrade Installed as planned. The City Hall boiler upgrade has been included in the scope of this ECO. M03 – Domestic Water Heater Upgrade Installed as planned. 6.2 CHANGES FROM INITIAL REPORTING – VEEP (APPENDIX B) E01 – T8 Lighting Upgrade Installed as planned in all buildings except for the Power Plant. Power Plant fixtures were high output (HO) fixtures and could not be replaced with typical T8 fixtures. E03 – Occupancy Sensor Installed as planned, though only 36 of the originally proposed 55 sensors could be installed due to grounding and work box sizing issues. 6.3 CHANGES FROM INITIAL REPORTING – EECBG (APPENDIX C) B05 – Energy Efficient Window Upgrade Newly added to the EECBG scope (previously under Whole Village). This ECO was installed as planned. C02 – Programmable Thermostat Upgrade Newly added to the EECBG scope (previously under Whole Village). This ECO was installed as planned. Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 36 Emmonak, AK E04 – Premium Efficiency Motor Upgrade Installed as planned for 9 of the originally proposed 11 motors. Stripped isolation valves prevented 2 of the motors from being replaced. M04 – Piping Insulation Upgrade Installed as planned. M05 – Unit Heater Upgrade Installed as planned. 6.3 FUNDING ALLOCATION SUMMARY TABLES WHOLE VILLAGE - PROJECT COSTS & EXPECTED SAVINGS - EMMONAK ECO Cost Savings SPB B01 - WEATHER-STRIPPING UPGRADE $ 6,108.66 $ 827.38 7.38 B02 - THERMAL INSULATION UPGRADE $ 43,691.97 $ 1,540.43 28.36 B03 - ENERGY EFFICIENT DOOR UPGRADE $ 13,771.29 $ 900.85 15.29 B04 - INSULATED FLOOR $ 15,762.97 N/A N/A B06 - ROOF UPGRADE $ 305,364.05 $ 3,373.67 90.51 C01 - CONTROLS UPGRADE $ 14,099.27 $ 17,133.47 0.82 E02 - T5 LIGHTING UPGRADE $ 33,757.31 $ 1,365.75 24.72 E05 - LED LIGHTING UPGRADE $ 25,061.95 $ 1,769.27 14.17 M01 - BOILER TUNE-UP $ 19,413.64 $ 24,780.28 0.78 M02 - BOILER UPGRADE $ 37,102.00 $ 2,605.98 14.24 M03 - DOMESTIC WATER HEATER UPGRADE $ 8,070.48 $ 555.48 14.53 TOTAL PROJECT COST $ 522,203.59 $ 54,852.57 9.52 TOTAL WHOLE VILLAGE GRANT $ 400,000.00 REALLOCATED FROM EMMONAK VEEP FUNDS $ 74,344.94 BUDGET EXCEEDED $ (47,858.65) VEEP - PROJECT COSTS & EXPECTED SAVINGS - EMMONAK ECO Cost Savings SPB E01 - T8 LIGHTING UPGRADE $ 62,277.70 $ 13,563.13 4.59 E03 - INSTALL OCCUPANCY SENSORS $ 13,377.35 $ 7,858.48 1.70 AVAILABLE FUNDING $ 74,344.94 *Available funding has been allocated to the Whole Village scope. TOTAL PROJECT COST $ 75,655.06 $ 21,421.61 3.53 TOTAL GRANT $ 150,000.00 Alaskan Village Audit Final Post Installation Report Energy Audit of City Buildings Ameresco Whole Village Audit - City of Emmonak Page 37 Emmonak, AK EECBG - PROJECT COSTS & EXPECTED SAVINGS - EMMONAK ECO Cost Savings SPB B05 - ENERGY EFFICIENT WINDOW UPGRADE $ 22,313.78 $ 200.13 111.49 C02 - PROGRAMMABLE THERMOSTATS $ 4,155.94 $ 9,405.35 0.44 E04 - PREMIUM EFFICIENCY MOTORS UPGRADE $ 36,453.86 $ 1,082.54 33.67 M04 - PIPING INSULATION $ 2,230.83 $ 2,213.87 1.01 M05 - UNIT HEATER UPGRADE $ 6,897.50 $ 793.64 8.69 AVAILABLE FUNDING $ 48.09 *Remaining funding at this site will be considered as available funding on future EECBG projects within the contract. TOTAL $ 72,100.00 $ 13,695.54 5.26 APPENDIX A WHOLE VILLAGE PROJECT COSTS & EXPECTED SAVINGS Note: All savings reported below are annual savings for each ECO, unless specifically stated otherwise. 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 Equivalent Fuel Cost Savings Simple Payback School 8 $555.33 $4,442.66 0.00 26.35 26.35 195.21 $0.00 $571.71 7.77 City Hall 2 $555.33 $1,110.67 0.00 7.36 7.36 54.51 $0.00 $186.41 5.96 Police Department 1 $555.33 $555.33 0.00 2.73 2.73 20.25 $0.00 $69.27 8.02 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 Equivalent Fuel Cost Savings Simple Payback Chuloonawick R-19 R-38 $31,557.33 0.00 23.77 23.77 176.09 $0.00 $602.24 52.40 Public Works R-19 R-38 $12,134.64 0.00 37.03 37.03 274.32 $0.00 $938.19 12.93 B03 - 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 Equivalent Fuel Cost Savings Simple Payback Public Works 2 $6,885.64 $13,771.29 0.00 35.56 35.56 263.41 $0.00 $900.85 15.29 B04 - INSULATED FLOOR Building Floor Square- Footage Insulation Added 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 Public Works 2400 N/A $15,762.97 N/A N/A N/A N/A N/A N/A N/A B06 - ROOF 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 Equivalent Fuel Cost Savings Simple Payback City Hall R-19 R-38 $305,364.05 0.00 138.10 138.10 986.45 0.00 $3,373.67 90.51 C01 - CONTROLS UPGRADE Building # of Thermo- stats Installed Controls Upgrade 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 1 1*$11,270.09 0.00 541.48 541.48 4,010.95 $0.00 $13,717.46 0.82 Police Department 3 2*$2,829.18 2,829.18 134.84 134.84 998.83 $0.00 $3,416.01 0.83 *1. A total of 10 3-way valves were installed in the Washeteria. *2. Circulator/Air Vent & Scoop APPENDIX A - WHOLE VILLAGE PROJECT COSTS & EXPECTED SAVINGS - EMMONAK 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. E02 - T5 LIGHTING UPGRADE Building # of Fixtures Price Per Fixture Total Cost Electric kWh Savings Annual Electric kW Savings Equivalent mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh & kW Cost Savings Annual Equivalent Fuel Cost Savings Simple Payback Water Treatment 13 $1,985.72 $25,814.42 4,277.73 17.63 14.60 310.43 $1,183.65 $1,061.67 21.81 Public Works 4 $1,985.72 $7,942.90 658.11 5.42 2.25 47.76 $182.10 $163.33 43.62 E05 - LED LIGHTING UPGRADE Number of Bulbs to be Exchanged Typical Lamp Wattage (kW) LED Wattage (kW)Total Cost Electric kWh Savings Annual Electric kW Savings Total mmBtu Savings Equivalent Fuel Gallons Savings Total Annual kWh Cost Savings Annual Equivalent Fuel Cost Savings Simple Payback 600 60 7 $25,061.95 5,787.60 31.80 19.75 420.00 $1,769.27 $1,436.40 14.17 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 School 2 1.4%$4,853.41 0.00 282.65 282.65 2,018.96 $0.00 $6,904.86 0.70 Washeteria 2 1.7%$4,853.41 0.00 113.29 113.29 809.18 $0.00 $2,767.41 1.75 Police Department 2 9.0%$4,853.41 0.00 190.63 190.63 1,361.62 $0.00 $4,656.73 1.04 Water Treatment 2 1.3%$4,853.41 0.00 427.83 427.83 3,055.93 $0.00 $10,451.29 0.46 M02 - BOILER UPGRADE Building # of Boilers to Replace New Boiler Efficiency (AFUE) 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 City Hall 2 85.70% $37,102.00 0.00 106.68 106.68 761.98 $0.00 $2,605.98 14.24 M03 - DOMESTIC WATER HEATER UPGRADE Building # of Water Heaters to Replace Price Per Heater Total Cost Current Annual mmBtu Proposed Annual kWh Equivalent Annual mmBtu Current Annual Fuel Cost Proposed Annual kWh Cost Annual Equivalent Fuel Cost Savings Simple Payback City Hall 1 $8,070.48 $8,070.48 21.93 0.00 0.00 $555.48 $0.00 $555.48 14.53 APPENDIX B VEEP PROJECT COSTS & EXPECTED SAVINGS Note: All savings reported below are annual savings for each ECO, unless specifically stated otherwise. E01 - T8 LIGHTING UPGRADE Building # of Fixtures Price Per Fixture Total Cost Electric kWh Savings Annual Electric kW Savings Equivalent mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh & kW Cost Savings Annual Equivalent Fuel Cost Savings Simple Payback School 311 $163.46 $50,835.60 25,615.70 145.20 87.43 1,858.90 $12,881.57 $6,357.45 3.95 City Hall 36 $163.46 $5,884.51 1,676.66 9.50 5.72 121.67 $241.27 $416.12 24.39 Police Department 34 $163.46 $5,557.59 1,591.20 0.68 5.43 0.00 $440.29 $0.00 12.62 Note (School): The savings for E01 at the Emmonak School are high for several reasons - 2. The quantity of lights to be replaced at the school is much higher than that of the other buildings. The savings, therefore, will be much higher. 3. The school is the only facility to be charged for electric kW demand use. Because E01 reduces demand, the school will also realize savings from this reduction. 4. The Police Department T8 retrofit involves replacing the current T8 and T12 fixtures and magnetic ballasts with T8 fixtures with electronic ballasts. E03 - INSTALL OCCUPANCY SENSORS Building # of Fixtures Price Per Fixture Total Cost Electric kWh Savings Annual Electric kW Savings Equivalent mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh & kW Cost Savings Annual Equivalent Fuel Cost Savings Simple Payback School 14 $371.59 $5,202.30 23,286.97 0.00 79.48 1,689.91 $5,770.51 $5,779.49 0.90 City Hall 7 $371.59 $2,601.15 4,280.57 0.00 14.61 310.64 $919.90 $1,062.38 2.83 Washeteria 5 $371.59 $1,857.97 1,506.27 0.00 5.14 109.31 $323.70 $373.84 5.74 Police Department 5 $371.59 $1,857.97 1,783.94 0.00 6.09 129.46 $383.37 $442.75 4.85 Chuloonawick 5 $371.59 $1,857.97 2,145.21 0.00 7.32 155.68 $461.01 $532.41 4.03 1. The school is one of the most commonly used facilities in the village, even after regular hours. The lights, therefore, burn longer than those in most other buildings. APPENDIX B - VEEP PROJECT COSTS & EXPECTED SAVINGS - EMMONAK 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 EECBG PROJECT COSTS & EXPECTED SAVINGS Note: All savings reported below are annual savings for each ECO, unless specifically stated otherwise. B05 - 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 Equivalent Fuel Cost Savings Simple Payback City Hall 11 Varies w/Size $22,313.78 0.00 7.90 7.90 58.52 $0.00 $200.13 111.49 C02 - PROGRAMMABLE THERMOSTATS Building # of Thermo- stats Installed Price Per Thermostat 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 City Hall 3 $415.59 $1,246.78 0.00 153.74 153.74 1,098.18 $0.00 $3,755.77 0.33 Police Department 6 $415.59 $2,493.56 0.00 134.84 134.84 963.16 $0.00 $3,294.01 0.76 Public Works 1 $415.59 $415.59 0.00 96.43 96.43 688.76 $0.00 $2,355.58 0.18 E04 - PREMIUM EFFICIENCY MOTORS UPGRADE Building # of Motors Price Per Motor Total Cost with Markup Electric kWh Savings Annual Electric kW Savings Equivalent mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh & kW Cost Savings Annual Equivalent Fuel Cost Savings Simple Payback Water Treatment 9 Varies w/HP $36,453.86 3,541.19 1.28 12.09 256.98 $1,082.54 $878.87 33.67 M04 - PIPING INSULATION Building Feet of Pipe to Insulate Price Per Foot of Insulation Total Cost with Markup Electric kWh Savings Fuel mmBtu Savings Total mmBtu Savings Equivalent Fuel Gallons Savings Annual kWh Cost Savings Annual Equivalent Fuel Cost Savings Simple Payback City Hall 100 $6.50 $1,493.33 0.00 50.43 50.43 373.57 $0.00 $1,277.62 1.17 Police Department 100 $6.50 $737.50 0.00 36.96 36.96 273.76 $0.00 $936.25 0.79 M05 - UNIT HEATER UPGRADE Building # of Heaters to Install Price Per Heater Total Cost with Markup Electric kWh Savings Fuel mmBtu Savings Total mmBtu Savings Fuel Gallons Savings Annual kWh Cost Savings Annual Fuel Cost Savings Simple Payback Public Works 1 $6,897.50 $6,897.50 0.00 32.49 32.49 232.06 $0.00 $793.64 8.69 APPENDIX C - EECBG PROJECT COSTS & EXPECTED SAVINGS - EMMONAK 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 D 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 door upgrade data. B04 Note: This ECO was completed using the eQuest program. Two building models were created and compared using pre- and post-install insulated floor. 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 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 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 D - EQUATIONS USED IN CALCULATIONS - EMMONAK 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 ($) = (MBtu Savings) x (Energy Cost) M03 1. Annual Energy Usage (mmBtu) = (41,045 Btu/Day) x (Total Days/Yr) x (Total Heaters) / (Energy Factor or Thermal Efficiency) 2. Annual Energy Usage (kWh) = (12.03 kWh/Day) x (Total Days/Yr) x (Total Heaters) / (Energy Factor or Thermal Efficiency) 3. (Commercial Type Heaters) Annual Standby Losses (mmBtu) = (Btu/Hr) x (24 Hrs/Day) x (Total Days/Yr) x (Total Heaters) / (1,000,000) 4. (Electric Type Heaters) Annual kW Use = System kW x 12 5. (Commercial Type Heaters) Total Annual Energy Usage (mmBtu) = Annual Energy Usage + Annual Standby Losses 6. Annual Savings = Baseline Conditions - Proposed Conditions M04 Energy Loss (MBtu) = (uninsulated loss - insulated loss) x (system hours) x (# of ft or sqft of hot surface) Savings ($) = (energy loss in MBtu) x (cost of source fuel per MBtu) M05 Note: This ECO is based on bin data, occupancy, heating peak loads, heater efficiency, and an assumed night setback. Baseline Usage = (Peak Load x Occupied Load Profile x All Hours) / (Old Heater Efficiency) ECM Usage = (Peak Load x Occupied Load Profile x All Hours) / (New Heater Efficiency) mmBtu Saved = Baseline Usage - ECM Usage 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 C03 APPENDIX E POST INSTALLATION PHOTOS APPENDIX E – POST INSTALLATION PHOTOS - EMMONAK Boiler Upgrade T8 Lighting Upgrade Window Upgrade High Efficiency Motor Upgrade