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Home My WebLink AboutKotlik 2012-VEEP ENERGY AUDIT POST INSTALLATION REPORT Results and Recommendations from Energy Audit of Kotlik For VEEP Grants City of Kotlik, Alaska June 20, 2012 Prepared By: Prepared For: Ameresco, Inc. 6643 Brayton Drive Anchorage, AK 99507 Alaska Energy Authority City of Kotlik Alaskan Village Audit Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page i Kotlik, AK TABLE OF CONTENTS EXECUTIVE SUMMARY AND PREFACE .................................................................................. 1 1.0 BUILDING DESCRIPTIONS ............................................................................................ 3 1.1 KOTLIK CITY HALL ................................................................................................. 3 1.2 KOTLIK COMMUNITY CENTER.................................................................................. 6 1.3 KOTLIK SCHOOL .................................................................................................... 8 1.4 KOTLIK W ATER TREATMENT PLANT ...................................................................... 10 2.0 UTILITIES ..................................................................................................................... 12 2.1 ELECTRICITY ....................................................................................................... 12 2.1.1 Electricity Usage Profiles ........................................................................13 2.2 FUEL ................................................................................................................... 15 3.0 OPERATIONS/MAINTENANCE PRACTICES ............................................................... 16 4.0 ENERGY CONSERVATION OPPORTUNITIES ............................................................ 17 4.1 ECO DESCRIPTIONS – INITIAL REPORTING ............................................................ 18 4.1.1 Building Envelope Opportunities .............................................................18 4.1.2 Electrical Opportunities ...........................................................................19 4.1.3 Mechanical Opportunities .......................................................................19 5.0 FINAL COSTING AND CHANGES FROM INITIAL REPORTING .................................. 20 5.1 CHANGES FROM INITIAL REPORTING ..................................................................... 20 5.2 FUNDING ALLOCATION SUMMARY TABLES ............................................................. 21 APPENDICES APPENDIX A – VEEP PROJECT COSTS & EXPECTED SAVINGS ...................................... A-1 APPENDIX B – EQUATIONS USED IN CALCULATIONS ...................................................... B-1 APPENDIX C – POST INSTALLATION PHOTOS ................................................................... C-1 Alaskan Village Audit Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 1 Kotlik, AK EXECUTIVE SUMMARY AND PREFACE This Post Installation Report summarizes the results of an Ameresco Energy Audit of the City of Kotlik, the initial energy savings measures identified and proposed, and any changes that may have occurred throughout the installation process. The City of Kotlik is a recipient of an Alaska Energy Authority (AEA) Village Energy Efficiency Program (VEEP) grant of $150,000. Ameresco engineers conducted an energy audit of the City of Kotlik on October 21, 2010. The table below shows the buildings audited and their respective square footages. City of Kotlik - Building Summary Building Category Square Footage City Hall Public Building 5,000 Community Center Public Building 4,000 Water Treatment Plant Public Facility 4,200 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 table below shows the results of Ameresco’s audit and potential calculation savings, allocated by grant. See Appendix A 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. VEEP - TOTAL PROJECT COSTS & EXPECTED SAVINGS - KOTLIK Cost Savings SPB TOTAL PROJECT COSTS $ 183,641.76 $ 19,759.91 9.29 Alaskan Village Audit Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 2 Kotlik, AK VEEP (INITIAL GRANT) - PROJECT COSTS & EXPECTED SAVINGS - KOTLIK ECO Cost Savings SPB B01 - WEATHERSTRIPPING $ 974.97 N/A N/A B02 - THERMAL INSULATION UPGRADE $ 24,067.25 $ 1,338.25 17.98 B03 - INSTALL ACCESS DOOR TO ATTIC $ 1,881.21 $ 37.45 50.24 B04 - ENERGY EFFICIENT DOOR UPGRADE $ 39,992.02 $ 732.00 54.63 E01 - T8 LIGHTING UPGRADE $ 26,835.40 $ 1,552.26 17.29 E02 - INSTALL OCCUPANCY SENSORS $ 3,260.93 $ 669.02 4.87 E03 - PREMIUM EFFICIENCY MOTORS UPGRADE $ 25,601.56 $ 518.35 49.39 M01 - BOILER TUNE-UP $ 7,344.19 $ 12,271.08 0.60 M02 - FURNACE UPGRADE $ 19,066.74 $ 564.08 33.80 AVAILABLE FUNDING $ 975.72 * Available funding allocated to street lighting upgrade TOTAL $ 150,000.00 $ 17,682.50 8.48 VEEP - STREETLIGHTING COSTS & EXPECTED SAVINGS - KOTLIK ECO Cost Savings SPB E04 - STREET LIGHTING UPGRADE $ 34,617.48 $ 2,077.41 16.66 REMAINING KOTLIK FUNDING $ 975.72 FUNDING REALLOCATED FROM AKIACHAK $ 7,460.31 FUNDING REALLOCATED FROM ALAKANUK $ 25,207.04 FUNDING REALLOCATED FROM BEAVER $ 2,921.12 FUNDING REALLOCATED FROM FORT YUKON $ 5,455.13 FUNDING REALLOCATED FROM HOLY CROSS $ 321.83 FUNDING REALLOCATED FROM KIPNUK $ 6,363.62 FUNDING REALLOCATED FROM NEWTOK $ 10,668.75 FUNDING REALLOCATED FROM NIKOLAI $ 390.55 FUNDING REALLOCATED FROM PILOT STATION $ 2,204.08 TOTAL AVAILABLE PROJECT FUNDS $ 61,968.15 REMAINING FUNDING $ 27,350.67 * Remaining funding applied to other VEEP projects that exceeded their initial budget constraints. Alaskan Village Audit Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 3 Kotlik, AK 1.0 BUILDING DESCRIPTIONS 1.1 KOTLIK CITY HALL Description: The Kotlik City Hall houses several offices including those of the mayor and village tribal council. A section of the building has also been converted into a jailhouse. Residents pay their cable bills in the City Hall office as well. General Conditions: The building is in fair condition. Structurally, the building appears to be sound with no major defects. The exterior of the building is showing many signs of age and weathering. The interior of the building is also showing some age due to floor and wall façade deterioration. Occupants complain of considerable draftiness, especially during the winter months. Many of the old ductwork vents have been blocked off in an attempt to fight this draftiness. Upon further investigation, most of the cold air appears to be coming into the building through the attic, which has poor insulation and does not have a door to block warm air from escaping. Pictures of general conditions found during the field audit immediately follow this building description. Building Envelope: The wood exterior of the building is in fair condition and shows many signs of wear. The standing seam metal and plywood roof appears to be in good condition. Windows are in fair condition, as many of them are broken or “fixed” with plexiglass. Door are in fair to poor condition; weatherstripping needs to be replaced, some doors do not seal properly, and the exterior jailhouse door is not insulated (it is merely constructed from plywood and does not insulate from the elements). Of most concern is the draftiness because of the attic. The insulation in the attic is in poor condition, and the lack of a door to the attic creates an escape for the building’s warm air. Heating: Two Monitor 2400 room heaters provide the building with heat. One heater is located in the main City Hall office, and the other is in the jailhouse area. The building was formerly furnace-heated, but the furnace became a fire hazard and was removed. Alaskan Village Audit Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 4 Kotlik, AK Controls: There are no controls in the City Hall building. Desired space temperatures are set on the Monitor room heaters to provide the space with adequate heating. Lighting: Interior lighting consists primary of T12 fluorescent fixtures with magnetic ballasts. There are 2 exterior fixtures that appear to be 150 watt metal halide (MH) fixtures. Domestic Water: The Kotlik City Hall receives it water directly from the village water plant. This facility does not have a domestic water heater. Alaskan Village Audit Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 5 Kotlik, AK Building Photos: Kotlik City Hall Damaged Plexiglass Window Replacement No Door Blocking Attic Draft Jailhouse Exterior Door Ceiling Damage in Jailhouse Blocked Furnace Exhaust and Burned Ceiling Exterior Door Does Not Closer Properly Alaskan Village Audit Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 6 Kotlik, AK 1.2 KOTLIK COMMUNITY CENTER Description: The Kotlik Community Center is the main gathering place for the village residents. The building is used 7 days a week for a wide variety of activities including traditional dancing and game nights. General Conditions: The building is in fair condition overall. The Kotlik Community Center appears to be structurally sound, and the interior spaces are in fair condition. The mechanical equipment is in poor shape and in need of replacement. Some of the electrical wiring is no longer safe, and there are exposed wires. Pictures of general conditions found during the field audit immediately follow this building description. Building Envelope: The building insulation is poor at best. The attic has very little insulation, and the doors do not seal well due to worn weather-stripping. Only one window remains and is in poor condition due to damage and cracking; all other windows have been boarded up. The standing seam metal roof appears to be in good condition. Heating: A Heil/Quaker furnace from around 1985 provides the building with heating. The furnace is listed as 80.2% efficient. The building’s radiant heating system no longer functions; occupants believe this is connected to some recent utility work. Controls: Heating is controlled by a mechanical thermostat located in the main gathering room. Lighting: Interior lighting fixtures are T12 fluorescent fixtures with magnetic ballasts. Domestic Water: Water is provided by the village water plant. The Community Center building does not have a domestic water heater. Alaskan Village Audit Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 7 Kotlik, AK Building Photos: Kotlik Community Center Furnace Stack Not Much Insulation in Attic Exposed Wiring Cracked Windows Doors Need New Weatherstripping Mechanical Thermostat Alaskan Village Audit Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 8 Kotlik, AK 1.3 KOTLIK SCHOOL Description: The Kotlik School houses elementary through high school age students. The school is divided into wings – a high school section, and an elementary and middle school section. The building also contains a cafeteria and gym. 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 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 in good condition. Doors seal properly and have adequate weather-stripping. Windows are double-pane clear glass and are in good condition. Heating: Three York AHUs provide the building with heating and air distribution. These AHUs appear to date to the mid-1990s, but are still in good condition. Controls: AHU-3 is connected to a Square D Enclosed 48 soft start motor drive controller. This controller allows the AHU motor to slowly ramp-up over time instead of a sudden start when the unit engages. Lighting: Interior lighting mainly consists of T8 fluorescent fixtures with electronic ballasts. Domestic Water: Four water heaters provide the school with domestic hot water. Two of these are indirect-fired water heaters; one has a 60 gallon capacity, and the other has a 120 gallon capacity. These BoilerMate water heaters appear to be in good condition. The remaining 2 water heaters are 50 galloon Rheem electric water heaters in good condition and were manufactured in 2007. Alaskan Village Audit Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 9 Kotlik, AK Building Photos: Kotlik School AHU-2 – York AHU Circulating Pumps Rheem Water Heaters Amtrol BoilerMate Water Heaters Alaskan Village Audit Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 10 Kotlik, AK 1.4 KOTLIK WATER TREATMENT PLANT Description: The Kotlik Water Treatment Plant provides the village with clean water for daily use. Most buildings use septic systems to treat wastewater, but the school’s wastewater is treated at the Water Treatment Plant. General Conditions: The facility is in fair condition, but is in need of a new generator. The current generator no longer functions, so if power goes out, the water plant can no longer operate. Pictures of general conditions found during the field audit immediately follow this building description. Building Envelope: The building appears to be in good condition – the exterior and standing seam metal roof show few signs of age and weathering. The doors seal well and have adequate weatherstripping. The building does not have any windows. Heating: Two Burnham V907 boilers provide the building with heating and appear to be in good condition. These boilers are rated at 82.6% thermally efficient. Controls: Building zones are controlled by a series of mechanical thermostats. Lighting: Interior lighting consists of mainly T12 fluorescent fixtures with magnetic ballasts. Domestic Water: The Water Treatment Plant does not have a domestic water heater. Vacuum System: There are a total of 2 vacuum pumps (10 hp each) at the water treatment plant. 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 Alaskan Village Audit Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 11 Kotlik, AK 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. Building Photos: Kotlik Water Treatment Plant Burnham Boilers Vacuum Pumps Water Pumps Circulating Pumps Alaskan Village Audit Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 12 Kotlik, AK 2.0 UTILITIES 2.1 ELECTRICITY The City of Kotlik 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 Kotlik are listed below. AVEC Cost of Fuel (Added to Customer Electric Bill) $ 0.2717 Rate Per kWh, Fuel Cost Included (1-700 kWh) $ 0.5717 Rate Per kWh, Fuel Cost Included (Over 700 kWh) $ 0.4717 PCE Rate (1-700 kWh) $ 0.3543 PCE Rate (Over 700 kWh) $ 0.3278 All audited buildings in Kotlik receive PCE funding, except for the Kotlik School. The Lower Yukon School District has its own agreement with AVEC and does not receive PCE funding. The AVEC rates for the Kotlik School are listed below. The school is also the only facility in the village to be charged for demand. AVEC Average Cost of Fuel $ 0.2289 Demand Cost, Per kW $ 45.00 Rate Per kWh, Fuel Cost Included (1-1,500 kWh) $ 0.3489 Rate Per kWh, Fuel Cost Included (Over 1,500 kWh) $ 0.2689 Alaskan Village Audit Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 13 Kotlik, AK 2.1.1 Electricity Usage Profiles City Hall Estimated Electric Usage 0 200 400 600 800 1000 1200 1400 1600 1800 2000 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 30000 35000 40000 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 Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 14 Kotlik, AK The next two charts are data gathered by Ameresco from bills but do not coincide with buildings visited at the time of the audit. These are for informational reporting purposes only. School Electric Demand (kW) 0 20 40 60 80 100 120 140 Oct- 09 Nov- 09 Dec- 09 Jan- 10 Feb- 10 Mar- 10 Apr- 10 May- 10 Jun- 10 Jul-10 Aug- 10 Sep- 10kW Fire Department Estimated Electric Usage 0 200 400 600 800 1000 1200 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 Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 15 Kotlik, AK 2.2 FUEL The City of Kotlik typically purchases its fuel in two bulk shipments each year. In 2010, Kotlik was unable to receive its second shipment in time, so the City “borrowed” fuel from AVEC at the rate listed below. Diesel Rate Per Gallon $ 5.54 Fuel Rate Per Gallon (From AVEC – Emergency Fuel Needed) $ 3.3478 The Kotlik School has its own fuel contract with Crowley Petroleum Distribution, Inc. The school purchases its fuel from Crowley at a rate of $2.99705/gallon. Office Estimated Electric Usage 0 200 400 600 800 1000 1200 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 Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 16 Kotlik, 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 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 Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 17 Kotlik, AK 4.0 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 Koyukuk project. There are some ECOs included in this section that were not performed, or the scope of work may have changed. Section 4 is for reference only. See Section 5 for updated project information. ECO No. ECO Description ECO MATRIX B=Building Envelope; C=Controls; E=Electrical; M=Mechanical; W=Water/Wastewater; R=Renewable KOTLIK City Office Community Center Water Treatment Building Envelope B01 Door Weather-stripping Upgrade X X B02 Insulation Upgrade X X B03 Install Access Panel to Ceiling X B04 Energy Efficient Door Upgrade X X Electrical E01 T-8 Lighting Upgrade X X X E02 Occupancy Sensors X X E03 Premium Efficiency Motors X Mechanical M01 Boiler Tune-Up X M02 Furnace Upgrade X Alaskan Village Audit Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 18 Kotlik, AK VEEP – INITIAL PROPOSAL (FINAL AUDIT REPORT) ECO Cost Savings SPB B01 - WEATHERSTRIPPING $ 4,704.00 $ 521.88 9.01 B02 - THERMAL INSULATION UPGRADE $ 39,060.00 $ 2,631.00 14.85 B03 - INSTALL ACCESS DOOR TO ATTIC $ 490.00 $ 37.45 13.09 B04 - ENERGY EFFICIENT DOOR UPGRADE $ 26,880.00 $ 210.12 127.92 E01 - T8 LIGHTING UPGRADE $ 28,163.80 $ 1,552.26 18.14 E02 - INSTALL OCCUPANCY SENSORS $ 3,857.00 $ 669.02 5.77 E03 - PREMIUM EFFICIENCY MOTORS UPGRADE $ 17,838.80 $ 4,146.78 4.30 M01 - BOILER TUNE-UP $ 4,200.00 $ 16,361.44 0.26 M02 - FURNACE UPGRADE $ 15,799.00 $ 564.08 28.01 DESIGN/AUDIT $ 2,500.00 AVAILABLE FUNDING $ 6,507.40 * Available funding allocated for travel expenses, shipping, additional labor, etc TOTAL $ 150,000.00 $ 26,694.04 5.62 4.1 ECO DESCRIPTIONS – INITIAL REPORTING 4.1.1 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 – 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. 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. Alaskan Village Audit Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 19 Kotlik, AK 4.1.2 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 – 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. E03 – 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%. 4.1.3 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 – Furnace Upgrade This ECO proposes replacing existing fuel oil furnaces 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. Furnaces employing modern technology can be installed to reduce energy consumption, improve system operations, and reduce maintenance costs. Alaskan Village Audit Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 20 Kotlik, AK 5.0 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 Section 5.2 and Appendix A. 5.1 CHANGES FROM INITIAL REPORTING B01 – Door Weather-stripping Upgrade Material was delivered to the village but not installed. Doors purchased for B04 included a weather- stripping upgrade. Savings for B01 and B04 have been combined to realize total savings from a door and weather-stripping upgrade. B02 – Thermal Insulation Upgrade Installed as planned. Removed from the scope at the City Office. B03 – Install Access Door to Attic Installed as planned. B04 – Energy Efficient Door Upgrade Installed as planned. E01 – T8 Lighting Upgrade Installed as planned. E02 – Occupancy Sensors Installed as planned. E03 – Premium Efficiency Motors Only 2 of the originally identified motors were installed due to various reasons including stripped isolation valves, altered motor shafts, and some previously installed upgrades. E04 – Street Lighting Upgrade Newly added ECO. This ECO was completed with additional funding from other villages within the scope of the VEEP grant. This funding reallocation was pre-approved by the AEA during the VEEP construction process. Alaskan Village Audit Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 21 Kotlik, AK M01 – Boiler Tune-Up Performed as planned. M02 – Furnace Upgrade Installed as planned. 5.2 FUNDING ALLOCATION SUMMARY TABLES VEEP - TOTAL PROJECT COSTS & EXPECTED SAVINGS - KOTLIK Cost Savings SPB TOTAL PROJECT COSTS $ 183,641.76 $ 19,759.91 9.29 VEEP (INITIAL GRANT) - PROJECT COSTS & EXPECTED SAVINGS - KOTLIK ECO Cost Savings SPB B01 - WEATHERSTRIPPING $ 974.97 N/A N/A B02 - THERMAL INSULATION UPGRADE $ 24,067.25 $ 1,338.25 17.98 B03 - INSTALL ACCESS DOOR TO ATTIC $ 1,881.21 $ 37.45 50.24 B04 - ENERGY EFFICIENT DOOR UPGRADE $ 39,992.02 $ 732.00 54.63 E01 - T8 LIGHTING UPGRADE $ 26,835.40 $ 1,552.26 17.29 E02 - INSTALL OCCUPANCY SENSORS $ 3,260.93 $ 669.02 4.87 E03 - PREMIUM EFFICIENCY MOTORS UPGRADE $ 25,601.56 $ 518.35 49.39 M01 - BOILER TUNE-UP $ 7,344.19 $ 12,271.08 0.60 M02 - FURNACE UPGRADE $ 19,066.74 $ 564.08 33.80 AVAILABLE FUNDING $ 975.72 * Available funding allocated to street lighting upgrade TOTAL $ 150,000.00 $ 17,682.50 8.48 Alaskan Village Audit Post Installation Report Energy Audit of City Buildings Ameresco VEEP Audit - City of Kotlik Page 22 Kotlik, AK VEEP - STREETLIGHTING COSTS & EXPECTED SAVINGS - KOTLIK ECO Cost Savings SPB E04 - STREET LIGHTING UPGRADE $ 34,617.48 $ 2,077.41 16.66 REMAINING KOTLIK FUNDING $ 975.72 FUNDING REALLOCATED FROM AKIACHAK $ 7,460.31 FUNDING REALLOCATED FROM ALAKANUK $ 25,207.04 FUNDING REALLOCATED FROM BEAVER $ 2,921.12 FUNDING REALLOCATED FROM FORT YUKON $ 5,455.13 FUNDING REALLOCATED FROM HOLY CROSS $ 321.83 FUNDING REALLOCATED FROM KIPNUK $ 6,363.62 FUNDING REALLOCATED FROM NEWTOK $ 10,668.75 FUNDING REALLOCATED FROM NIKOLAI $ 390.55 FUNDING REALLOCATED FROM PILOT STATION $ 2,204.08 TOTAL AVAILABLE PROJECT FUNDS $ 61,968.15 REMAINING FUNDING $ 27,350.67 * Remaining funding applied to other VEEP projects that exceeded their initial budget constraints. APPENDIX A VEEP 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 City Office 4 $162.50 $649.98 N/A N/A N/A N/A N/A N/A N/A Community Center 2 $162.50 $324.99 N/A N/A N/A N/A N/A N/A N/A 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 Community Center R-17 R-36 $24,067.25 0.00 33.82 33.82 241.56 $0.00 $1,338.25 17.98 B03 - INSTALL ACCESS DOOR TO ATTIC Building # of Access Doors Access Door Size 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 1 ~ 2x2 feet $1,881.21 0.00 0.95 0.95 6.76 $0.00 $37.45 50.24 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 Equivalent Fuel Cost Savings Simple Payback City Office 4 $6,665.34 $26,661.35 0.00 11.58 11.58 82.72 $0.00 $458.25 58.18 Community Center 2 $6,665.34 $13,330.67 0.00 6.92 6.92 49.41 $0.00 $273.75 48.70 APPENDIX A - VEEP PROJECT COSTS & EXPECTED SAVINGS - KOTLIK 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. 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 City Office 22 Varies w/# of lamps $6,086.38 1,505.50 12.41 5.14 109.25 $327.30 $605.26 18.60 Community Center 41 Varies w/# of lamps $11,342.80 921.84 10.82 3.15 66.90 $200.41 $370.61 56.60 Water Treatment 34 Varies w/# of lamps $9,406.22 4,712.78 27.74 16.08 342.00 $1,024.56 $1,894.69 9.18 E02 - INSTALL OCCUPANCY SENSORS Building # of Sensors Price Per Sensor 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 Office 9 $250.84 $2,257.56 1,913.18 0.00 6.53 138.84 $415.93 $769.16 5.43 Community Center 4 $250.84 $1,003.36 1,164.20 0.00 3.97 84.49 $253.10 $468.05 3.96 E03 - 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 2 Varies w/HP $25,601.56 2,384.30 0.81 8.14 173.03 $518.35 $958.57 49.39 E04 - 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 32 150W HPS 47W LED $34,617.48 14,436.48 39.55 49.27 1,047.64 $2,077.41 $5,803.93 16.66 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 2.60%$7,344.19 0.00 310.10 310.10 2,215.00 $0.00 $12,271.08 0.60 M02 - FURNACE UPGRADE Building # of Furnaces to Replace New Furnace 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 Community Center 1 84.50%$19,066.74 0.00 14.25 14.25 101.82 $0.00 $564.08 33.80 APPENDIX B 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 RETscreen program. This calculation was completed by varying the air change rate (ac/h) in pre- and post-installation circumstances. 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 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) E03 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) E04 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) M01 Savings (MBtu) = (Boiler Input Rating) x ((1/Tested Efficiency)-(1/Desired Efficiency)) x (Hours per Year) Savings ($) = (MBtu Savings) x (Energy Cost) M02 1. Heat Loss Rate (mmBtu/hr) = MBLC x (Heating Temp Setpoint - Mean Bin Temp) 2. Heat Load (MBH) = Heat Loss Rate x 1000 3. MBH-hr = Heat Load x Bin Heating Hours / (kW/ton) 4. Fuel Used (mmBtu) =[(MBH-hr) / Efficiency] / 1000 5. mmBtu Saved = (mmBtu)Existing - (mmBtu)Proposed APPENDIX B - EQUATIONS USED IN CALCULATIONS - KOTLIK 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 E03 Load factor assumed to be 80% except in some cases. Vacuum pumps assumed 100% load factor. Diversity factor assumed to be 95%. 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 FOR E02 - 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) APPENDIX C POST INSTALLATION PHOTOS APPENDIX C – POST INSTALLATION PHOTOS - KOTLIK New Attic Access Door New Exterior Door T8 Lighting Upgrade New Furnace and Stack