Loading...
HomeMy WebLinkAboutSEA-AEE-JNU Augustus Brown Pool 2012-EE Augustus Brown Pool City and Borough of Juneau Funded by: Final Report January 2012 Prepared by: Energy Audit Table of Contents Section 1: Executive Summary 2  Section 2: Introduction 6  Section 3: Energy Efficiency Measures 8  Section 4: Description of Systems 14  Section 5: Methodology 17  Appendix A: Energy and Life Cycle Cost Analysis 20  Appendix B: Utility and Energy Data 27  Appendix C: Equipment Data 34  Appendix D: Abbreviations 37  Audit Team The energy audit is performed by Alaska Energy Engineering LLC of Juneau, Alaska. The audit team consists of:  Jim Rehfeldt, P.E., Energy Engineer  Jack Christiansen, Energy Consultant  Brad Campbell, Energy Auditor  Loras O’Toole P.E., Mechanical Engineer  Will Van Dyken P.E., Electrical Engineer  Curt Smit, P.E., Mechanical Engineer  Philip Iverson, Construction Estimator  Karla Hart, Technical Publications Specialist  Jill Carlile, Data Analyst  Grayson Carlile, Energy Modeler Augustus Brown Pool 1 Energy Audit (January 2012) Section 1 Executive Summary An energy audit of the Augustus Brown Pool was performed by Alaska Energy Engineering LLC. The investment grade audit was funded by Alaska Housing Finance Corporation (AHFC) to identify opportunities to improve the energy performance of public buildings throughout Alaska. The Augustus Brown Pool is a 17,362 square foot building that contains commons, an office, restrooms, locker rooms, a weight room area, a pool, storage spaces, and mechanical support spaces. Building Assessment The following summarizes our assessment of the building: Envelope The exterior of the building appears to be in good condition with the exception of the paint peeling (primarily around the clerestory siding). This peeling is most likely due to moisture being driven from the inside of the building to the exterior surface. The remaining exterior of the envelope displays good maintenance practices. The exterior doors are not thermally broken. Future exterior door replacement selection should include this feature. The main entry doors have single pane glazing. The wood-framed double pane windows in the office and the clerestory single pane windows with removable interior storm windows all have failed glazing. Upgrading of all of these units is outlined in Section 3, Energy Efficiency Measures (EEMs) 10-12. Heating System The building and the pool are heated by a fuel oil boiler that provides heat to five air handling unit systems, fan coil units, the pool heat exchanger system, and perimeter hydronic systems. The building also has an unused electric boiler that is maintained and appears to be in good condition. Because it is currently less expensive to heat with electricity then it is to heat with fuel oil in Juneau, we recommend (EEM-4) that the electric boiler be operated as the primary heat source, with the fuel oil boiler supplementing during colder weather. The domestic hot water system consists of a 700-gallon indirect hot water tank that supplies domestic hot water to the fixtures and showers. The tank setpoint is 157°F and a thermostatic valve mixes it with cold water to supply 137°F water to the fixtures. Energy will be saved if the domestic hot water storage tank produces 140°F water and the mixing valve supplies 120°F to the fixtures. (EEM-5) We recommend (EEM-8) that a pool cover system be used when the pool is not in use. The cover will reduce heat loss and evaporation from the pool. This will also allow the ventilation systems to modulate downward while maintain proper humidity levels. The remainder of the fuel oil boiler heating system appears to be in good condition; however fairly simple improvements can be made to improve its effectiveness and efficiency. These are outlined in Section 3, EEM-6 and EEM-9. Augustus Brown Pool 2 Energy Audit (January 2012) Ventilation System The building ventilation system consists of five large air handling units and ten exhaust fans for the purposes of heating and cooling spaces and improving building air quality. The overall condition of the ventilation systems is good and routine preventive maintenance tasks are being scheduled and performed. A heat recovery ventilator HRV provides ventilation, heat, and humidity control for the natatorium. The system supplies a constant flow of 100% outside air regardless of variations in occupancy, outside air humidity, and building humidity generation. There is opportunity to vary this flow rate with building loads. The design indicates that the HRV is adequate to heat, ventilate and provide humidity control for the natatorium. However, several older air handling units and exhaust fans have remained in service for various functions. An HVAC review is needed to determine if the following systems are needed or if they can be removed and their openings sealed:  AHU-1 serves the natatorium and is redundant with the newer HRV that conditions the space. Currently, AHU-1 is being operated to circulate air in the natatorium. The unit is recirculating air without any means of humidity control. AHU-1 should be turned off.  AHU-2 serves the natatorium and is redundant to the newer HRV that conditions the space. AHU-2 is currently being operated to supply supplemental heat. If the HRV can adequately heat the natatorium, the unit should be disabled.  GEF-1, 2, and 3 are exhaust fans for the natatorium. They are only operated during the summer because the natatorium heating system cannot keep up if they operate in the winter. If the HRV is maintaining adequate humidity control, these fans should be disabled. AHU-4 supplies heat and ventilation to the locker rooms. The air flow is 20% of the design capacity. which is limiting the ability of the unit to heat and ventilate the space. The reason for the lower capacity must be corrected. A reported issue with AHU operating below capacity is that the locker rooms are cold on cold days. To compensate, the exhaust fan for the locker room spaces (TEF-1) is turned off to keep the temperature in the locker rooms warm enough. This results in a reduction of air quality in these spaces. The HVAC systems are not turned off or modulated to lower capacity during unoccupied periods. Adjusting the hours of operation of the exhaust fans and AHU fans accordingly will save energy. Although the pool is open until midnight for rentals on Monday through Friday, staff report that rentals seldom happen midweek. Adjusting DDC schedules for fan controls should include the ability to turn systems down/off during scheduled rental periods that are not utilized. These steps are outlined Section 3, EEM-7. The energy efficiency of the HRV located outside of the building will be increased if the unit and its associated ducting are enclosed. Framing in this space would be relatively easy because the roof has already been extended to cover the unit. Augustus Brown Pool 3 Energy Audit (January 2012) Lighting Interior lighting consists primarily of T8, T12, and metal halide lighting. Exterior lighting consists primarily of compact fluorescent fixtures. The interior 400-watt metal halide fixtures were installed for pool safety and are providing useful heat to the building so an upgrade is not recommended. Because the additional heat produced by the T12 fluorescent fixtures is also beneficial within the building envelope, the current maintenance plan of replacing the T12 fixtures with more efficient T8 fixtures only as the ballasts fail is a responsible approach to phasing in the newer and more efficient T8 fixtures. Summary It is the assessment of the energy audit team that the most significant of the building energy losses could be reduced by optimizing ventilation rates and schedules in accordance with occupancy and then retro-commissioning the ventilation equipment. Energy Efficiency Measures (EEMs) All buildings have opportunities to improve their energy efficiency. The energy audit revealed several opportunities in which an efficiency investment will result in a net reduction in long-term operating costs. Behavioral and Operational EEMs The following EEMs require behavioral and operational changes in the building use. The savings are not readily quantifiable but these EEMs are highly recommended as low-cost opportunities that are a standard of high performance buildings. EEM-1: De-Lamp Soft Drink and Snack Coolers (total of two machines) EEM-2: Identify Air Flow Restrictions in AHUs Augustus Brown Pool 4 Energy Audit (January 2012) High and Medium Priority EEMs The following EEMs are recommended for investment. They are ranked by life cycle savings to investment ratio (SIR). This ranking method places a priority on EEMs which can be immediately funded and generate energy savings to fund other EEMs in the following years. Negative values, in parenthesis, represent savings. 25-Year Life Cycle Cost Analysis Investment Operating Energy Total SIR High Priority EEM-3: Replace Aerators and Showerheads $1,200 $0 ($304,200) ($303,000) 253.5 EEM-4: Operate Electric Boiler $22,000 ($1,700) ($784,300) ($764,000) 35.7 EEM-5: Reduce HW Tank Temperature $200 $0 ($1,500) ($1,300) 7.5 EEM-6: Install Boiler Room Heat Recovery $55,100 $4,300 ($407,800) ($348,400) 7.3 EEM-7: Optimize HVAC Systems $163,400 $0 ($1,134,100) ($970,700) 6.9 EEM-8: Install Pool Covers $92,400 $17,000 ($655,500) ($546,100) 6.9 EEM-9: Insulate Expansion Tank $500 $0 ($3,300) ($2,800) 6.6 Medium Priority EEM-10: Replace Single Pane Door Glazing $4,900 $0 ($12,800) ($7,900) 2.6 EEM-11: Replace Clerestory Windows $58,300 $0 ($108,500) ($50,200) 1.9 EEM-12: Replace Failed Office Windows $5,300 $0 ($7,600) ($2,300) 1.4 EEM-13: Upgrade Motors $9,000 $0 ($9,500) ($500) 1.1 Totals* $412,300 $19,600 ($3,429,100) ($2,997,200) 8.3 *The analysis is based on each EEM being independent of the others. While it is likely that some EEMs are interrelated, an isolated analysis is used to demonstrate the economics because the audit team is not able to predict which EEMs an Owner may choose to implement. If several EEMs are implemented, the resulting energy savings is likely to differ from the sum of each EEM projection. Summary The energy audit revealed numerous opportunities for improving the energy performance of the building. We recommend that the behavioral and high priority EEMs be implemented now to generate energy savings from which to fund the medium priority EEMs. Another avenue to consider is to borrow money from AHFCs revolving loan fund for public buildings. AHFC will loan money for energy improvements under terms that allow for paying back the money from the energy savings. More information on this option can be found online at http://www.ahfc.us/loans/akeerlf_loan.cfm. Augustus Brown Pool 5 Energy Audit (January 2012) Section 2 Introduction This report presents the findings of an energy audit of the Augustus Brown Pool located in Juneau, Alaska. The purpose of this investment grade energy audit is to evaluate the infrastructure and its subsequent energy performance to identify applicable energy efficiencies measures (EEMs). The energy audit report contains the following sections:  Introduction: Building use and energy consumption.  Energy Efficiency Measures: Priority ranking of the EEMs with a description, energy analysis, and life cycle cost analysis.  Description of Systems: Background description of the building energy systems.  Methodology: Basis for how construction and maintenance cost estimates are derived and the economic and energy factors used for the analysis. BUILDING USE The Augustus Brown Pool is a 17,362 square foot building that contains commons, an office, restrooms, locker rooms, a weight room area, a pool, storage spaces, and mechanical support spaces. The pool support equipment must be operated 24/7 to sustain pool operations. The pool facilities have approximately 4 staff members working per shift and are utilized by approximately 100-125 patrons per day. The facility is occupied in the following manner: Monday, Wednesday, Friday: 5:30 am – 8:30 pm 8:45 pm – Midnight Rental Period Tuesday, Thursday: 6:30 am – 8:45 pm 9:00 pm – Midnight Rental Period Saturday 9:00 am – 4:15 pm 4:30 pm – Midnight Rental Period Sunday 12:00 pm – 6:00 pm 6:15 pm – Midnight (Rental) Building History 1972 – Original Construction of Pool 1988 – Replaced original pool with two concrete/plaster tanks 1997 – Roofing repairs 1999 – Siding and roofing repairs 2000 – Installation of new heat recovery ventilator (HRV) to replace AHU-5, installation of new hollow core metal doors, and 40 new 400-watt metal halide fixtures. Augustus Brown Pool 6 Energy Audit (January 2012) Energy Consumption The building energy sources include an electric service and a fuel oil tank. Fuel oil is used for the majority of the heating loads and domestic hot water while electricity serves all other loads. The following table shows annual energy use and cost. Annual Energy Consumption and Cost Source Consumption Cost Energy, MMBtu Electricity 523,065 kWh $45,500 1,800 27% Fuel Oil 36,208 Gallons $137,600 4,900 73% Totals $183,100 6,700 100% Electricity This chart shows electrical energy use from 2007 to 2010. Consumption drops in May-June while the pool is closed for draining and cleaning of the basin. The effective cost—energy costs plus demand charges—is 8.7¢ per kWh. Fuel Oil The following chart shows heating energy use from 2007 to 2010. The chart compares annual use with the heating degree days which is a measurement of the demand for energy to heat a building. A year with a higher number of degree days reflects colder outside temperatures and a higher heating requirement. The current cost of fuel oil (August 2011) is $3.23 per gallon. Assuming a fuel oil conversion efficiency of 70% and an electric boiler conversion efficiency of 95%, oil heat at $3.23 per gallon equates to electric heat at 10.8¢ per kWh. Since the current cost of electricity is 10.1¢ per kWh, electric heat will be less expensive than fuel oil heat if demand charges are minimized. Augustus Brown Pool 7 Energy Audit (January 2012) Section 3 Energy Efficiency Measures The following energy efficiency measures (EEMs) were identified during the energy audit. The EEMs are priority ranked and, where applicable, subjected to energy and life cycle cost analysis. Appendix A contains the energy and life cycle cost analysis spreadsheets. The EEMs are grouped into the following prioritized categories:  Behavioral or Operational: EEMs that require minimal capital investment but require operational or behavioral changes. The EEMs provide a life cycle savings but an analysis is not performed because the guaranteed energy savings is difficult quantify.  High Priority: EEMs that require a small capital investment and offer a life cycle savings. Also included in this category are higher cost EEMs that offer significant life cycle savings.  Medium Priority: EEMs that require a significant capital investment to provide a life cycle savings or lower cost EEMs that offer modest savings. Many medium priority EEMs provide a high life cycle savings and offer substantial incentive to increase investment in building energy efficiency. Augustus Brown Pool 8 Energy Audit (January 2012) BEHAVIORAL OR OPERATIONAL The following EEMs are recommended for implementation. They require behavioral or operational changes that can occur with minimal investment to achieve immediate savings. These EEMs are not easily quantified by analysis because they cannot be accurately predicted. They are recommended because they offer a life cycle savings, represent good practice, and are accepted features of high performance buildings. EEM-1: De-Lamp Soft Drink and Snack Coolers (total of two machines) Purpose: Lamps for the soft drink and snack coolers in the spectator area are continuously on and are not necessary. Energy will be saved if these lamps are removed. Scope: Remove lamps from the soft drink and snack coolers in the spectator area EEM-2: Identify Air Flow Restrictions in AHUs Purpose: The 1989 air balancing report performed by Neudorfer Engineers identified significant air flow reductions in each of the air handling systems. It was reported that the restrictions were not corrected. Energy will be saved if the fans deliver their design flow rates. It is also possible that these restrictions are contributing to the problems of keeping the women’s locker room adequately heated. These restrictions include: - AHU-2 design = 7,200 cfm actual = 4,470 cfm - AHU-3 design = 4,240 cfm actual = 785 cfm - AHU-4 design = 2,560 cfm actual = 2,150 cfm - TEF-1 design = 2,770 cfm actual = 835 cfm - TEF-2 design = 890 cfm actual = 495 cfm Scope: Investigate systems to determine where restrictions exist and correct if possible. Augustus Brown Pool 9 Energy Audit (January 2012) HIGH PRIORITY The following EEMs are recommended for implementation because they have a high savings to investment ratio. The EEMs are listed from highest to lowest priority. Negative values, in parenthesis, represent savings. EEM-3: Replace Aerators and Showerheads Purpose: Energy and water will be saved by replacing the lavatory aerators and showerheads with low-flow models. Scope: Replace lavatory aerators and showerheads with water-conserving fixtures. Annual Costs Life Cycle Costs Operating Energy Total Investment Operating Energy Total SIR $0 ($11,920) ($11,920) $1,200 $0 ($304,200) ($303,000) 253.5 EEM-4: Operate Electric Boiler Purpose: The electric boiler is not currently used to heat the building. It was reported that it is well maintained and operational. If demand control is used, it is less expensive to heat with electricity than it is to heat with fuel oil in Juneau. The electric boiler should be put in service and used as the primary boiler, and the fuel oil boiler should be operated to carry the remaining heating load. Scope: Return the electric boiler to service and operate as the primary boiler. Annual Costs Life Cycle Costs Operating Energy Total Investment Operating Energy Total SIR ($100) ($14,120) ($14,220) $22,000 ($1,700) ($784,300) ($764,000) 35.7 EEM-5: Reduce Domestic Hot Water Tank Temperature Purpose: An indirect hot water heater system consists of one 700-gallon domestic hot water tank to supply domestic hot water to the fixtures and showers. The hot water leaves the tank at 157°F, a tempering valve reduces it to 137°F, and a second tempering valve reduces it to 120°F at the fixtures. Energy will be saved if the domestic hot water storage tank temperature setpoint is reduced to 140°F and the second tempering valve disabled. Scope: Reduce the domestic hot water storage tank temperature from 157°F to 140°F and disable the second tempering valve. Annual Costs Life Cycle Costs Operating Energy Total Investment Operating Energy Total SIR $0 ($50) ($50) $200 $0 ($1,500) ($1,300) 7.5 Augustus Brown Pool 10 Energy Audit (January 2012) EEM-6: Install Boiler Room Heat Recovery Purpose: The boiler room utilizes exhaust fan GEF-8 to discharge excess heat outdoors. Energy will be saved if the heat generated from the boiler room is transferred to the natatorium. Scope: Install a heat pump unit in the boiler room. Install evaporator ductwork to extract heat from the boiler room air. Install condenser ductwork to transfer the heat to the natatorium. Install automatic dampers and controls on the combustion air openings to retain the boiler heat within the room for heat recovery. Annual Costs Life Cycle Costs Operating Energy Total Investment Operating Energy Total SIR $250 ($13,540) ($13,290) $55,100 $4,300 ($407,800) ($348,400) 7.3 EEM-7: Optimize HVAC Systems Purpose: The building utilizes fixed-flow heating and ventilation system units to provide conditioned air to interior spaces as needed. Exhaust and AHU fans are not turned off after hours by the DDC system. The actual hours of operation of the pool were much longer prior to the opening of the Diamond Park Aquatic Center. Now that pool rental demand and operational hours have decreased, adjusting the hours of operation of the exhaust fans and AHU fans accordingly will save energy. Although the pool is open until midnight for rentals on Monday through Friday, staff report that rentals seldom happen midweek. Adjusting DDC schedules for fan controls should include the ability to turn systems down/off during scheduled rental periods that are not utilized. Energy will be saved if modifications are made to the respective air handling systems to reduce air flow when not needed. Scope: Perform repairs as follows and commission all air handling units to perform as a properly integrated system when completed: HRV: Recalibrate the HRV mixing and bypass dampers for proper operation. Recalibrate defrost controls; recirculation operation will limit the need to defrost. Install a VFD on the exhaust fan and modulate the fan to maintain negative pressure in the natatorium. AHU-3: Turn off during unoccupied hours and cycle at night to maintain space setback temperature. AHU-4, TEF-1 and TEF-2: Replace with an HRV that operates only when the building is occupied. Annual Costs Life Cycle Costs Operating Energy Total Investment Operating Energy Total SIR $0 ($40,940) ($40,940) $163,400 $0 ($1,134,100) ($970,700) 6.9 Augustus Brown Pool 11 Energy Audit (January 2012) EEM-8: Install Pool Covers Purpose: The swimming pool loses heat to the natatorium due to evaporation and heat loss. The evaporation raises the building humidity, which is controlled by supplying more heated outside air. A significant amount of surface area (3,375 square feet - large pool and 1,575 square feet - small pool) is exposed to these energy losses. There are currently 68 hours per week that a pool cover could be used. Scope: Install pool covers with mechanical deploy and retract system for the two pools. Annual Costs Life Cycle Costs Operating Energy Total Investment Operating Energy Total SIR $1,000 ($23,130) ($22,130) $92,400 $17,000 ($655,500) ($546,100) 6.9 EEM-9: Insulate Expansion Tank Purpose: The uninsulated boiler expansion tank has a large amount of surface area for heat loss. Energy will be saved if this tank is insulated to reduce heat loss. Scope: Insulate the boiler system expansion tank. Annual Costs Life Cycle Costs Operating Energy Total Investment Operating Energy Total SIR $0 ($120) ($120) $500 $0 ($3,300) ($2,800) 6.6 MEDIUM PRIORITY Medium priority EEMs are recommended because they offer a life cycle savings. The EEMs are listed from highest to lowest priority. Negative values, in parenthesis, represent savings. EEM-10: Replace Single-Pane Door Glazing Purpose: Single pane glass with an insulation value of approximately R-1was selected for the main entry door glazing. Energy will be saved if these single pane glazing units are removed and replaced with energy efficient R-3 double pane glazing. Scope: Replace single pane glazing with energy efficient double pane glazing units. Annual Costs Life Cycle Costs Operating Energy Total Investment Operating Energy Total SIR $0 ($450) ($450) $4,900 $0 ($12,800) ($7,900) 2.6 EEM-11: Replace Clerestory Windows Purpose: Wood framing and a single pane glass with interior storm window was used for the clerestory windows. Almost every unit has completely failed, the result of which is an insulation value of approximately R-1. Energy will be saved if the windows are replaced with energy efficient R-3 window units. Scope: Replace existing windows with energy efficient double pane windows. Annual Costs Life Cycle Costs Operating Energy Total Investment Operating Energy Total SIR $0 ($3,830) ($3,830) $58,300 $0 ($108,500) ($50,200) 1.9 Augustus Brown Pool 12 Energy Audit (January 2012) EEM-12: Replace Failed Office Windows Purpose: The glazing units in the wood-framed double pane office windows have failed. Energy will be saved if the windows are removed and replaced with energy efficient R-3 window units. Scope: Replace failed windows with energy efficient double pane windows. Annual Costs Life Cycle Costs Operating Energy Total Investment Operating Energy Total SIR $0 ($270) ($270) $5,300 $0 ($7,600) ($2,300) 1.4 EEM-13: Upgrade Motors to Premium Efficiency Purpose: The equipment inspection identified three motors that could be upgraded with premium efficiency models to save energy. They are: - AHU-4 1-1/2 HP - AHU-3 2 HP - P-6 20 HP Scope: Replace identified motors with premium efficiency motors. Annual Costs Life Cycle Costs Operating Energy Total Investment Operating Energy Total SIR $0 ($480) ($480) $9,000 $0 ($9,500) ($500) 1.1 Augustus Brown Pool 13 Energy Audit (January 2012) Section 4 Description of Systems ENERGY SYSTEMS This section provides a general description of the building systems. Energy conservation opportunities are addressed in Section 3, Energy Efficiency Measure. Building Envelope R-value Component Description (inside to outside) Existing Optimal Pool Walls 8” CMU, 1 ½” foam insulation, ½” plywood, 1”x6” T&G siding R-10 R-26 Remaining Walls 5/8” gyp bd, 2”x6” wood stud, R-19 batt, ½” ply, 1”x6” T&G siding R-20 R-26 Upper Roof 6” foam insulation R-30 R-46 Sloped Roof 3” foam insulation, R-15 R-46 Floor Slab 4” Concrete slab-on-grade R-10 R-10 Foundation 8” concrete with 2” rigid insulation on interior surface R-10 R-20 Office Windows Wood single pane windows R-0.75 R-5 Office Window Vinyl double pane R-1.5 R-5 Clerestory Windows Wood single pane with storm windows R-1.0 R-5 First Floor Windows Aluminum clad wood double pane windows R-1.5 R-5 Doors Steel doors w/ non-thermally broken frames R-1.5 R-5 Heating System The building and the pool are heated by one fuel oil boiler that provide heat to five air handling unit systems, fan coil units, the pool heat exchanger system, and perimeter hydronic systems. The heating system has the following pumps: P-1 is the pool pump P-2 is the radiant pump P-3 is the coil pump P-4 is the domestic water heating pump P-5 is the small pool filtration pump P-6 is the big pool filtration pump Augustus Brown Pool 14 Energy Audit (January 2012) Ventilation Systems Area Fan System Description Natatorium AHU-1 5,250 cfm 3 hp constant volume air handling unit operating in full recirculation mode for dehumidification. Natatorium AHU-2 4,470 cfm 3 hp constant volume air handling unit consisting of a heating coil, mixing box, filter section, and supply fan. Operated to supply supplemental heat. (Note – AHU-2 design rating of 7,200 cfm, cause of restriction unknown) Lobby/Office/Spectator Area AHU-3 785 cfm 2 hp constant volume air handling unit consisting of a heating coil, mixing box, filter section, and supply fan (Note – AHU-3 design rating of 4,240 cfm, cause of restriction unknown) Locker Rooms AHU-4 2,150 cfm 1.5 hp constant volume air handling unit consisting of a heating coil, mixing box, filter section, and supply fan (Note – AHU-4 design rating of 2,560 cfm, cause of restriction unknown) Natatorium HRV 11,952 cfm 15 hp supply, 13,013 cfm 10 hp exhaust constant volume heat recovery air handling unit consisting of a heating coil, filter section, supply fan, and exhaust fan Pool Filtration Room SF-1 100 cfm constant volume supply air fan Locker Rooms TEF-1 835 cfm ¾ hp constant volume exhaust air fan Bathrooms TEF-2 495 cfm ½ hp constant volume exhaust air fan Natatorium GEF-1 4330 cfm ¾ hp constant volume exhaust air fan Natatorium GEF-2 4010 cfm ¾ hp constant volume exhaust air fan Natatorium GEF-3 not running Equipment Storage GEF-5 100 cfm constant volume exhaust air fan Pool & Equipment Storage GEF-6 100 cfm constant volume exhaust air fan Pool Filtration Room GEF-7 100 cfm constant volume exhaust air fan Boiler Room GEF-8 100 cfm constant volume exhaust air fan Family Changing Room GEF-9 80 cfm constant volume exhaust air fan Domestic Hot Water System The domestic hot water system consists of a 700-gallon indirect domestic hot water tank and a thermostatic mixing station. The tank is currently producing 157°F water. A mixing station adds cold water to produce 137°F water supply to the fixtures where a second tempering valve reduces the water to 120°F. Augustus Brown Pool 15 Energy Audit (January 2012) Automatic Control System The building has a DDC system to control the operation of the heating and ventilation systems. Energy can be saved through further optimization of fan system scheduling combined with a retro- commissioning of the air handler systems. Lighting Interior lighting consists primarily of T8, T12, and metal halide lighting. Exterior lighting consists primarily of compact fluorescent fixtures. The interior 400-watt metal halide fixtures were installed for pool safety and are providing useful heat to the building so no recommendations are offered for their replacement. Because the additional heat produced by the T12 fluorescent fixtures is beneficial within the building envelope in the Juneau climate, the current maintenance plan of replacing the T12 fixtures with more efficient T8 fixtures only as the ballasts fail is a responsible approach to phasing in the newer and more efficient T8 fixtures. Electric Equipment No significant electrical equipment was noted beyond that necessary for building and pool support infrastructure. Augustus Brown Pool 16 Energy Audit (January 2012) Section 5 Methodology Information for the energy audit was gathered through on-site observations, review of construction documents, and interviews with operation and maintenance personnel. The EEMs are evaluated using energy and life cycle cost analyses and are priority ranked for implementation. Energy Efficiency Measures Energy efficiency measures are identified by evaluating the building’s energy systems and comparing them to systems in modern, high performance buildings. The process for identifying the EEMs acknowledges the realities of an existing building that was constructed when energy costs were much lower. Many of the opportunities used in modern high performance buildings—highly insulated envelopes, variable capacity mechanical systems, heat pumps, daylighting, lighting controls, etc.— simply cannot be economically incorporated into an existing building. The EEMs represent practical measures to improve the energy efficiency of the buildings, taking into account the realities of limited budgets. If a future major renovation project occurs, additional EEMs common to high performance buildings should be incorporated. Life Cycle Cost Analysis The EEMs are evaluated using life cycle cost analysis which determines if an energy efficiency investment will provide a savings over a 25-year life. The analysis incorporates construction, replacement, maintenance, repair, and energy costs to determine the total cost over the life of the EEM. Future maintenance and energy cash flows are discounted to present worth using escalation factors for general inflation, energy inflation, and the value of money. The methodology is based on the National Institute of Standards and Technology (NIST) Handbook 135 – Life Cycle Cost Analysis. Life cycle cost analysis is preferred to simple payback for facilities that have long—often perpetual— service lives. Simple payback, which compares construction cost and present energy cost, is reasonable for short time periods of 2-4 years, but yields below optimal results over longer periods because it does not properly account for the time value of money or inflationary effects on operating budgets. Accounting for energy inflation and the time value of money properly sums the true cost of facility ownership and seeks to minimize the life cycle cost. Construction Costs The cost estimates are derived based on a preliminary understanding of the scope of each EEM as gathered during the walk-through audit. The construction costs for in-house labor are $60 per hour for work typically performed by maintenance staff and $110 per hour for contract labor. The cost estimate assumes the work will be performed as part of a larger renovation or energy efficiency upgrade project. When implementing EEMs, the cost estimate should be revisited once the scope and preferred method of performing the work has been determined. It is possible some EEMs will not provide a life cycle savings when the scope is finalized. Augustus Brown Pool 17 Energy Audit (January 2012) Maintenance Costs Maintenance costs are based on in-house or contract labor using historical maintenance efforts and industry standards. Maintenance costs over the 25-year life of each EEM are included in the life cycle cost calculation spreadsheets and represent the level of effort to maintain the systems. Energy Analysis The energy performance of an EEM is evaluated within the operating parameters of the building. A comprehensive energy audit would rely on a computer model of the building to integrate building energy systems and evaluate the energy savings of each EEM. This investment grade audit does not utilize a computer model, so energy savings are calculated with factors that account for the dynamic operation of the building. Energy savings and costs are estimated for the 25-year life of the EEM using appropriate factors for energy inflation. Prioritization Each EEM is prioritized based on the life cycle savings to investment ratio (SIR) using the following formula: Prioritization Factor = Life Cycle Savings / Capital Costs This approach factor puts significant weight on the capital cost of an EEM, making lower cost EEMs more favorable. Economic Factors The following economic factors are significant to the findings.  Nominal Interest Rate: This is the nominal rate of return on an investment without regard to inflation. The analysis uses a rate of 5%.  Inflation Rate: This is the average inflationary change in prices over time. The analysis uses an inflation rate of 2%.  Economic Period: The analysis is based on a 25-year economic period with construction beginning in 2010. Augustus Brown Pool 18 Energy Audit (January 2012) Electricity Electricity is supplied by Alaska Electric Light & Power Company (AEL&P). The building is billed for electricity under AEL&P’s Rate 24. This rate charges for both electrical consumption (kWh) and peak electric demand (kW). Electrical consumption is the amount of energy consumed and electric demand is the rate of consumption. AEL&P determines the electric demand by averaging demand over a continuously sliding fifteen minute window. The highest fifteen minute average during the billing period determines the peak demand. The following table lists the electric charges, which includes a 24% rate hike that was recently approved: AEL&P Small Government Rate with Demand Charge 1 On-peak (Nov-May) Off-peak (June-Oct) Energy Charge per kWh 6.11¢ 5.92¢ Demand Charge per kW $14.30 $9.11 Service Charge per month $99.24 $99.24 Over recent history, electricity inflation has been less than 1% per year, which has lagged general inflation. An exception is the recent 24% rate hike that was primarily due to construction of additional hydroelectric generation at Lake Dorothy. This project affords the community a surplus of power which should bring electric inflation back to the historic rate of 1% per year. Load growth from electric heat conversions is likely to increase generating and distribution costs, especially if diesel supplementation is needed. Combining these two factors contribute to an assumed electricity inflation rate of 3%. Summary The following table summarizes the energy and economic factors used in the analysis. Summary of Economic and Energy Factors Factor Rate or Cost Factor Rate or Cost Nominal Discount Rate 5% Electricity Current rates General Inflation Rate 2% Electricity Inflation 3% Fuel Oil Cost (2012) $3.80/gal Fuel Oil Inflation 6% Augustus Brown Pool 19 Energy Audit (January 2012) Appendix A Energy and Life Cycle Cost Analysis Augustus Brown Pool 20 Energy Audit (January 2012) Alaska Energy Engineering LLC Energy and Life Cycle Cost Analysis 25200 Amalga Harbor Road Tel/Fax: 907.789.1226 Juneau, Alaska 99801 jim@alaskaenergy.us Augustus Brown Pool Basis Economic Study Period (years) 25 Nominal Discount Rate 5%General Inflation 2% Energy 2011 $/gal Fuel Inflation 2012 $/gal Fuel Oil $3.80 6% $4.03 Electricity $/kWh (2011)$/kW (2011)Inflation $/kWh (2012)$/kW (2012) w/ Demand Charges $0.061 $10.62 3% $0.063 $10.94 w/o Demand Charges $0.102 -3% $0.105 - EEM-3: Replace Aerators and Showerheads Energy Analysis η boiler 68% Fixture Existing Proposed Uses/day Days Water,Gals % HW kBTU Gallons Showerhead 20 10 100 350 -350,000 80% -186,816 -1,984 Lavatories 0.3 0.2 75 198 -2,673 80% -1,427 -15 -352,673 -1,999 Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost Construction Costs Replace lavatory aerators 0 7 ea $35 $245 Replace showerhead 0 27 ea $35 $945 Energy Costs Water 1 - 25 -353 kgals $10.960 ($75,983) Fuel Oil 1 - 25 -1,999 gal $4.03 ($228,201) Net Present Worth ($303,000) EEM-4: Operate Electric Boiler Energy Analysis Fuel Oil Boilers Annual Gal η boiler Heat kBtu % Fuel Oil Boiler kBtu η boiler Annual Gal Savings, gal 36,200 68% 3,409,316 60% 2,045,590 68% 21,720 -14,480 Electric Boiler % Electric kBtu η boiler kWh 40% 1,363,726 95% 420,721 Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost Construction Costs Start-up electric boiler 0 1 ea $5,000 $5,000 Boiler lead/lag control panel 0 1 ea $15,000 $15,000 Retro-commission boiler controls 0 1 ea $2,000 $2,000 Annual Costs Fuel oil boiler maintenance 1 - 25 -1 ls $200.00 ($3,405) Electric boiler maintenance 1 - 25 1 ls $100.00 $1,703 Energy Costs Electric Energy (Effective Cost) 1 - 25 420,721 kWh $0.105 $868,887 Fuel Oil 1 - 25 -14,480 gal $4.03 ($1,653,208) Net Present Worth ($764,000) Gallons per Use Augustus Brown Pool 21 Energy Audit (January 2012) Alaska Energy Engineering LLC Energy and Life Cycle Cost Analysis 25200 Amalga Harbor Road Tel/Fax: 907.789.1226 Juneau, Alaska 99801 jim@alaskaenergy.us Augustus Brown Pool EEM-5: Reduce HW Tank Temperature Energy Analysis Service Length 157F 140F Factor kBtu η boiler Gallons HWT 5 130 102 100% -1,226 68% -13 Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost Construction Costs Turn down HW Tank Temperature 0 1 ea $60 $60 Disable thermostatic mixing valve 0 1 ea $180 $180 Energy Costs Fuel Oil 1 - 25 -13 gal $4.03 ($1,487) Net Present Worth ($1,200) EEM-6: Install Boiler Room Heat Recovery Energy Analysis Heat Recovery Input, MBH Jacket Loss MBH Hours Loss, kBtu Factor Recovery, kBtu η boiler Gallons 3,938 -1.0% -39 8,760 -344,938 100% -344,938 82%-3,037 Heat Pump Energy Recovery, kBtu COP kWh HP Heat, kBtu η boiler Gallons -344,938 3 33,699 114,979 82% -1,012 Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost Construction Costs Boiler room heat pump 0 1 LS $15,000 $15,000 Ductwork 0 1 LS $4,000 $4,000 Combustion air louvers and controls 0 1 LS $8,000 $8,000 Controls 0 1 LS $4,000 $4,000 Estimating contingency 0 15%$4,650 Overhead & profit 0 30% $10,695 Design fees 0 10%$4,635 Project management 0 8%$4,078 Annual Costs Heat pump maintenance 1 - 25 1 LS $250.00 $4,257 Energy Costs Electric Energy 1 - 25 33,699 kWh $0.063 $41,621 Electric Demand 1 - 25 60.0 kW $10.94 $12,902 Fuel Oil 1 - 25 -4,050 gal $4.03 ($462,354) Net Present Worth ($348,500) Augustus Brown Pool 22 Energy Audit (January 2012) Alaska Energy Engineering LLC Energy and Life Cycle Cost Analysis 25200 Amalga Harbor Road Tel/Fax: 907.789.1226 Juneau, Alaska 99801 jim@alaskaenergy.us Augustus Brown Pool EEM-7: Optimize HVAC Systems Energy Analysis Fan Case CFM ΔP η, fan BHP η, motor kW Hours kWh HRV-SF Existing -13,000 2.00 50%-8 91%-7 8,760 -58,752 Optimized 9,000 1.75 50%5 91%4 8,760 35,590 HRV-EF Existing -13,000 2.00 50%-8 91%-7 8,760 -58,752 Optimized 10,000 1.75 50%6 91%5 8,760 39,544 AHU-3 Existing -4,250 1.50 55%-2 88%-2 8,760 -13,620 Optimized 4,250 1.50 55%2 88%2 6,480 10,075 AHU-4 Existing -2,560 1.50 55%-1 88%-1 8,760 -8,157 TEF-1 Existing -835 0.75 50%0 70% -0.2 8,760 -1,840 TEF-2 Existing -495 0.75 50%0 70% -0.1 8,760 -1,091 HRV SF Optimized 1,200 2.00 50%1 85% 0.7 6,480 4,295 HRV EF Optimized 1,330 2.00 50%1 85% 0.7 6,480 4,760 -5 -47,946 Ventilation SA CFM MAT T,room MBH Hours kBtu η boiler Gallons Pool HRV Existing -13,000 60 85 -351 8,760 -3,074,760 68% -32,648 Optimized 10,000 60 85 270 8,760 2,365,200 68%25,114 AHU-4 Existing -2,560 60 75 -41 8,760 -363,295 68%-3,857 Locker HRV Optimized 1,330 55 75 29 6,480 186,157 68%1,977 -177,137 -9,415 Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost Construction Costs Recalibrate HRV damper controls; VFD controls 0 1 ls $10,000 $15,000 Recalibrate defrost operation 0 1 ls $3,500 $3,500 Install VFD 0 1 ls $7,500 $7,500 Locker and Toilet HRV 0 1 ls $66,000 $66,000 Estimating contingency 0 15% $13,800 Overhead & profit 0 30% $31,740 Design fees 0 10% $13,754 Project management 0 8% $12,104 Energy Costs Electric Energy 1 - 25 -47,946 kWh $0.063 ($59,218) Fuel Oil 1 - 25 -9,415 gal $4.03 ($1,074,919) Net Present Worth ($970,700) Augustus Brown Pool 23 Energy Audit (January 2012) Alaska Energy Engineering LLC Energy and Life Cycle Cost Analysis 25200 Amalga Harbor Road Tel/Fax: 907.789.1226 Juneau, Alaska 99801 jim@alaskaenergy.us Augustus Brown Pool EEM-8: Install Pool Covers Energy Analysis Evaporation Pool A, sqft Pw, in HG Pa, in HG Quiet, MBH Hours kBtu η boiler Gallons Lap 3,375 1.3347 0.6009 -180.8 3,400 -614,686 68%-6,527 Kid 1,575 1.0664 0.6009 -53.5 3,400 -181,971 68%-1,932 -234 -796,657 -8,459 Makeup Pool lb/hr Tp Tw MBH Hours kBtu η boiler Gallons Kid -181 88 40 -9 3,400 -29,505 68%-313 Lap -54 81 40 -2 3,400 -7,461 68%-79 -234 -11 -36,966 -393 Ventilation CFM Tosa Troom Hours Heat Recovery kBtu η boiler Gallons -3,000 40 85 3,400 50% -247,860 68% -2,632 Savings Gallons Factor Savings, gals -11,483 50% -5,742 Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost Construction Costs Lap pool cover 0 1 LS $40,000 $40,000 Small pool cover 0 1 LS $12,000 $12,000 Estimating contingency 0 15%$7,800 Overhead & profit 0 30% $17,940 Design fees 0 10%$7,774 Project management 0 8%$6,841 Annual Costs Cover maintenance 1 - 25 1 ea $1,000.00 $17,027 Energy Costs Fuel Oil 1 - 25 -5,742 gal $4.03 ($655,526) Net Present Worth ($546,100) EEM-9: Insulate Expansion Tank Energy Analysis Service Area Uninsulated 1-1/2" Insul Factor kBtu η boiler Gallons Ex Tank 4 462 46 75% -2,733 68% -29 Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost Construction Costs Insulate expansion tank 0 1 ea $500 $500 Energy Costs Fuel Oil 1 - 25 -29 gal $4.03 ($3,313) Net Present Worth ($2,800) Augustus Brown Pool 24 Energy Audit (January 2012) Alaska Energy Engineering LLC Energy and Life Cycle Cost Analysis 25200 Amalga Harbor Road Tel/Fax: 907.789.1226 Juneau, Alaska 99801 jim@alaskaenergy.us Augustus Brown Pool EEM-10: Replace Single Pane Door Glazing Energy Analysis Component Area R,exist R,new ΔT MBH kBtu η boiler Gallons Windows 37 0.75 2.5 35 -1.2 -10,588 68%-112 Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost Construction Costs Replace window glazing unit 0 37 sqft $75 $2,775 Estimating contingency 0 15%$416 Overhead & profit 0 30%$957 Design fees 0 10%$415 Project management 0 8%$365 Energy Costs Fuel Oil 1 - 25 -112 gal $4.03 ($12,835) Net Present Worth ($7,900) EEM-11: Replace Clerestory Windows Energy Analysis Component Area R,exist R,new ΔT MBH kBtu η boiler Gallons Windows 438 1.0 3.0 35 -10.2 -89,527 68%-951 Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost Construction Costs Replace window glazing unit 0 438 sqft $75 $32,850 Estimating contingency 0 15%$4,928 Overhead & profit 0 30% $11,333 Design fees 0 10%$4,911 Project management 0 8%$4,322 Energy Costs Fuel Oil 1 - 25 -951 gal $4.03 ($108,531) Net Present Worth ($50,200) EEM-12: Replace Failed Office Windows Energy Analysis Component Area R,exist R,new ΔT MBH kBtu η boiler Gallons Windows 40 1.0 2.5 30 -0.7 -6,307 68%-67 Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost Construction Costs Replace window glazing unit 0 40 sqft $75 $3,000 Estimating contingency 0 15%$450 Overhead & profit 0 30%$1,035 Design fees 0 10%$449 Project management 0 8%$395 Energy Costs Fuel Oil 1 - 25 -67 gal $4.03 ($7,646) Net Present Worth ($2,300) Augustus Brown Pool 25 Energy Audit (January 2012) Alaska Energy Engineering LLC Energy and Life Cycle Cost Analysis 25200 Amalga Harbor Road Tel/Fax: 907.789.1226 Juneau, Alaska 99801 jim@alaskaenergy.us Augustus Brown Pool EEM-13: Upgrade Motors Energy Analysis Equip Number HP ηold ηnew kW Hours kWh AHU-4 1 1.5 74.0% 86.5% -0.14 6,480 -906 AHU-3 1 2 80.8% 86.5% -0.09 6,480 -551 P-6 1 20 88.5% 93.0% -0.67 6,480 -4,351 -0.9 -5,808 Life Cycle Cost Analysis Year Qty Unit Base Cost Year 0 Cost Construction Costs HP Replace motor 1.5 0 1 LS 955 $955 Replace motor 2 0 1 LS 970 $970 Replace motor 20 0 1 LS 3,160 $3,160 Estimating contingency 0 15%$763 Overhead & profit 0 30%$1,754 Design fees 0 10%$760 Project management 0 8%$669 Energy Costs Electric Energy 1 - 25 -5,808 kWh $0.063 ($7,174) Electric Demand 1 - 25 -11 kW $10.94 ($2,313) Net Present Worth ($500) Augustus Brown Pool 26 Energy Audit (January 2012) Appendix B Energy and Utility Data Augustus Brown Pool 27 Energy Audit (January 2012) Alaska Energy Engineering LLC Billing Data 25200 Amalga Harbor Road Tel/Fax: 907-789-1226 Juneau, Alaska 99801 jim@alaskaenergy.us Augustus Brown Pool ELECTRIC RATE Electricity ($ / kWh )0.0611 0.0592 Demand ( $ / kW )14.30 9.11 Customer Charge ( $ / mo )99.24 99.24 Sales Tax ( % )0.0% 0.0% ELECTRICAL CONSUMPTION AND DEMAND kWh kW kWh kW kWh kW kWh kW Jan 44,290 89.6 47,060 86.1 44,840 86.2 41,240 83.2 44,358 Feb 49,160 87.1 45,370 87.3 40,600 82.9 41,160 84.9 44,073 Mar 44,330 88.2 43,820 89.5 38,580 76.1 43,000 85.1 42,433 Apr 43,550 84.5 43,660 88.0 44,640 85.1 47,400 89.4 44,813 May 49,150 89.2 43,240 87.3 44,050 85.4 44,490 85.0 45,233 Jun 41,250 86.0 33,300 65.0 31,370 84.8 38,880 85.1 36,200 Jul 45,190 85.4 42,340 83.9 45,180 85.2 46,350 86.6 44,765 Aug 48,290 89.6 42,350 87.7 44,010 84.7 44,630 85.8 44,820 Sep 39,330 89.6 45,130 86.7 43,800 84.7 44,660 83.2 43,230 Oct 44,320 87.4 46,350 86.6 46,500 85.5 46,870 86.3 46,010 Nov 47,730 85.7 44,360 88.4 42,980 85.2 41,790 84.3 44,215 Dec 44,840 85.1 36,860 84.5 43,970 82.4 46,000 85.3 42,918 Total 541,430 513,840 510,520 526,470 523,065 Average 45,119 87 42,820 85 42,543 84 43,873 85 43,589 Load Factor 70.8% 68.9% 69.4% 70.4% 85 ELECTRIC BILLING DETAILS Month Energy Demand Cust & Tax Total Energy Demand Cust & Tax Total % Change Jan 2,740 1,233 99 4,072 2,520 1,190 99 3,809 -6.5% Feb 2,481 1,185 99 3,765 2,515 1,214 99 3,828 1.7% Mar 2,357 1,088 99 3,545 2,627 1,217 99 3,943 11.2% Apr 2,728 1,217 99 4,044 2,896 1,278 99 4,274 5.7% May 2,691 1,221 99 4,012 2,718 1,216 99 4,033 0.5% Jun 1,917 773 99 2,788 2,376 775 99 3,250 16.6% Jul 2,760 776 99 3,636 2,832 789 99 3,720 2.3% Aug 2,689 772 99 3,560 2,727 782 99 3,608 1.3% Sep 2,676 772 99 3,547 2,729 758 99 3,586 1.1% Oct 2,841 779 99 3,719 2,864 786 99 3,749 0.8% Nov 2,626 1,218 99 3,944 2,553 1,205 99 3,858 -2.2% Dec 2,687 1,178 99 3,964 2,811 1,220 99 4,130 4.2% Total $ 31,193 $ 12,212 $ 1,191 $ 44,596 $ 32,167 $ 12,430 $ 1,191 $ 45,788 2.7% Average $ 2,599 $ 1,018 $ 99 $ 3,716 $ 2,681 $ 1,036 $ 99 $ 3,816 2.7% Cost ($/kWh) $0.087 70% 27% 3% $0.087 -0.4% Electrical costs are based on the current electric rates. 2009 2010 2010 AEL&P Electric Rate 24 On-Peak Nov-May Off-peak Jun-Oct Month 2007 2008 2009 Average Augustus Brown Pool 28 Energy Audit (January 2012) Alaska Energy Engineering LLC Annual Electric Consumption 25200 Amalga Harbor Road Tel/Fax: 907-789-1226 Juneau, Alaska 99801 jim@alaskaenergy.us Augustus Brown Pool 0 10,000 20,000 30,000 40,000 50,000 60,000 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov DecElectric Use (kWh)Month of the Year Electric Use History 2007 2008 2009 2010 0.0 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov DecElectric Demand (kW)Month of the Year Electric Demand History 2007 2008 2009 2010 Augustus Brown Pool 29 Energy Audit (January 2012) Alaska Energy Engineering LLC Electric Cost 25200 Amalga Harbor Road Tel/Fax: 907-789-1226 Juneau, Alaska 99801 jim@alaskaenergy.us Augustus Brown Pool 2010 $ 0 $ 500 $ 1,000 $ 1,500 $ 2,000 $ 2,500 $ 3,000 $ 3,500 $ 4,000 $ 4,500 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov DecElectric Cost (USD)Month of the Year Electric Cost Breakdown 2010 Electric Use (kWh) Costs Electric Demand (kW) Costs Customer Charge and Taxes 80.0 81.0 82.0 83.0 84.0 85.0 86.0 87.0 88.0 89.0 90.0 0 5,000 10,000 15,000 20,000 25,000 30,000 35,000 40,000 45,000 50,000 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Electric Demand (kW)Electric Use (kWh)Month of the Year Electric Use and Demand Comparison 2010 Electric Use Electric Demand Augustus Brown Pool 30 Energy Audit (January 2012) Alaska Energy Engineering LLC Annual Fuel Oil Consumption 25200 Amalga Harbor Road Tel/Fax: 907-789-1226 Juneau, Alaska 99801 jim@alaskaenergy.us Augustus Brown Pool Year Fuel Oil Degree Days 2,007 38,307 9,282 2,008 34,814 9,093 2,009 34,323 9,284 2,010 37,389 9,013 5,000 6,000 7,000 8,000 9,000 10,000 0 5,000 10,000 15,000 20,000 25,000 30,000 35,000 40,000 2007 2008 2009 2010 Degree DaysGallons of Fuel OilYear Annual Fuel Oil Use Fuel Oil Degree Days Augustus Brown Pool 31 Energy Audit (January 2012) Alaska Energy Engineering LLC Annual Water Consumption 25200 Amalga Harbor Road Tel/Fax: 907-789-1226 Juneau, Alaska 99801 jim@alaskaenergy.us Augustus Brown Pool Year Water 2,007 2,088,000 2,008 2,196,000 2,009 2,364,000 2,010 2,304,000 1,800,000 1,900,000 2,000,000 2,100,000 2,200,000 2,300,000 2,400,000 2007 2008 2009 2010Gallons of WaterYear Annual Water  Use Augustus Brown Pool 32 Energy Audit (January 2012) Alaska Energy Engineering LLC 25200 Amalga Harbor Road Tel/Fax: 907-789-1226 Juneau, Alaska 99801 jim@alaskaenergy.us Annual Energy Consumption and Cost Energy Cost $/MMBtu Area ECI EUI Fuel Oil $3.80 $39.20 17,362 $10.55 386 Electricity $0.087 $26.83 Source Cost Electricity 523,065 kWh $45,500 1,800 27% Fuel Oil 36,208 Gallons $137,600 4,900 73% Totals $183,100 6,700 100% Annual Energy Consumption and Cost Consumption Energy, MMBtu $0 $5 $10 $15 $20 $25 $30 $35 $40 $45 Fuel Oil ElectricityCost $ / MMBtuCost of Heat Comparison Augustus Brown Pool 33 Energy Audit (January 2012) Appendix C Equipment Data Augustus Brown Pool 34 Energy Audit (January 2012) MotorHP / Volts / RPM / EfficP 1 Boiler Room Pool PumpGrundfos UPS 80-160208 V/ 4.05 Amps/ 1500 W Speed 2P 2 Boiler Room Radiant PumpGrundfos UMS 50-80208 V/ 1.16 AmpsSpeed 2P 3 Boiler Room Coil PumpGrundfos UPC 80-160208 V/ 3.15 AmpsSpeed 1P 4 Boiler Room Domestic Water Grundfos UMS 50-60208 V/ 360 Watts Speed 2P 5 Boiler Room Sm Pool Circulation Pump Taco 2595-13001-17427.5 HP/ 208 V/ 1750 RPM/ 91%P 6 Boiler Room Big Pool Circulation Pump Taco 10-40957-1400048420 HP/ 208 V/ 1750 RPM/ 88.5%P 7Chlorine Boost PumpNot UsedP 8Chlorine Boost PumpNot UsedSauna Pool Area SaunaTLC15 kW 208 V185° FAHU 1 North Fan Room Pool Deck Return Air Trane T-125250 CFM 3 HP/ 208 V/ 1735 RPM/ 87.5% Runs 24/7 AHU 2 South Fan Room Pool Deck HeatTrane T-124470 CFM 3 HP/ 208 V/ 1765 RPM/ 90.2%AHU 3 North Fan Room Lobby, Office, Spectator Trane T-8785 CFM 2 HP/ 208 V/ 1740 RPM/ 81.5%AHU 4 South Fan Room Locker RoomsTrane T-62150 CFM 1.5 HP/ 208 V/ 1745 RPM/ 74%GEF 1Pool Area Exhaust Windmaker DCE4H4330 CFM 3/4 HP/ 200 V/ 1725 RPM/80% off 50% of yearGEF 2Pool Area Exhaust Windmaker DCE4H4010 CFM 3/4 HP/ 200 V/ 1725 RPM/80% off 50% of yearGEF 3Pool Area Exhaust Windmaker DCE4Hnot running 3/4 HP/ 200 V/ 1725 RPM/80% off 50% of yearGEF 4Filter Room ExhaustRemovedGEF 5 Equipment Storage Equipment Storage Room~100 CFM 115 VGEF 6Pool Equip Storage Room~100 CFM 115 VGEF 7 Pool Filtration Pool Filtration~100 CFM 115 VGEF 8 Boiler Room Boiler Room Exhaust~100 CFM 115 VAugustus Brown Pool - Major Equipment InventoryCapacityNotesUnit ID Location Function Make Model Augustus Brown Pool 35 Energy Audit (January 2012) MotorHP / Volts / RPM / EfficAugustus Brown Pool - Major Equipment InventoryCapacityNotesUnit ID Location Function Make ModelGEF 9Family Changing Room~80 CFM 115 VB 1 Boiler Room Fuel Oil BoilerCleaver Brook CPH-100-803,347,000 BTU/hrB 2 Boiler Room Back Up Electric Boiler Weil McLain CW-112382,200 BTU/hr208 VTEF 1 South Fan Room Locker Rooms GreenheckSWB-116-CCW-THX835 CFM 3/4 HP/ 208 V/ 1725 RPM/ 80%TEF 2 North Fan Room Bathrooms Pace U9F 495 CFM 1/2 HP/ 208 V/ 1750 RPM/62%SF 1 Pool Filtration Room Supply Air for Room ~120 CFM 115 V Set @ 55°SF 2AC 1 Boiler Room Air Compressor Quincy 5 HP/ 208 V/ 1725 RPM/ 82.5%Pneumatic ControlDHWT Boiler Room Domestic Hot Water AO Smith 87005700 GallonIndirect Hot Water HeaterHRV supplyOutsideHeat RecoveryGreenheck 22-B1DW-213-E 11,952 CFM 15 HP/ 208 V/ 1760 RPM/ 91%July 2000 Modern MechHRV exhaustGreenheck 22-B1DW-213-F 13,013 CFM 10 HP/ 208 V/ 1760 RPM/ 89.5%July 2000 Modern MechP AHU 3 North Fan Room AHU 3 Heat Loop Grundfos UMS 40-40115 V/ 134 WattsP Boiler Room DHW Circulation Pump Grundfos UP 25-64 SF115 V/ 1.7 AmpsAugustus Brown Pool 36 Energy Audit (January 2012) Appendix D Abbreviations AHU Air handling unit BTU British thermal unit BTUH BTU per hour CBJ City and Borough of Juneau CMU Concrete masonry unit CO2 Carbon dioxide CUH Cabinet unit heater DDC Direct digital controls DHW Domestic hot water EAD Exhaust air damper EEM Energy efficiency measure EF Exhaust fan Gyp Bd Gypsum board HVAC Heating, Ventilating, Air- conditioning HW Hot water HWRP Hot water recirculating pump KVA Kilovolt-amps kW Kilowatt kWh Kilowatt-hour LED Light emitting diode MBH 1,000 Btu per hour MMBH 1,000,000 Btu per hour OAD Outside air damper PSI Per square inch PSIG Per square inch gage RAD Return air damper RF Return fan SIR Savings to investment ratio SF Supply fan UV Unit ventilator VAV Variable air volume VFD Variable frequency drive Augustus Brown Pool 37 Energy Audit (January 2012)