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KEEPS Energy Management Toolkit Step 2: Assess Performance & Opportunities Toolkit 2H: Water Heating. Step 2 Assess Performance & Opportunities Toolkit 2 h Water Heating. Kentucky Energy Efficiency Program for Schools KEEPS Energy Management Toolkit. KEEPS Energy Management Toolkit. - PowerPoint PPT Presentation
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J.B. Speed School of Engineering University of Louisville
KEEPS Energy Management ToolkitStep 2: Assess Performance & OpportunitiesToolkit 2H: Water Heating
Kentucky Energy Efficiency Program for Schools
KEEPS EnergyManagement Toolkit
Step 2
Assess Performance & Opportunities
Toolkit 2H
Water Heating
2KPPC Kentucky’s Resource Center for Environmental Sustainability
KEEPS Energy Management ToolkitToolkit 2H: Water Heating
KEEPSEnergyManagementToolkit
Toolkit 2HWater Heating
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3KPPC Kentucky’s Resource Center for Environmental Sustainability3
7-Step Energy Management Process
1. Make the Commitment
2. Assess Performance and Opportunities
3. Set Performance Goals
4. Create an Action Plan
5. Implement the Action Plan
6. Evaluate Progress
7. Recognize Achievements
4KPPC Kentucky’s Resource Center for Environmental Sustainability
Water Heating Overview
• KEEPS On-site Energy Assessment Form
• Determining System Efficiency
• KEEPS Water Heating Tool
• Identifying Areas for Savings• Maintenance (flushing of sediment)• Temperature reduction• Timers (electric heater and recirculation pump)• System replacement
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5KPPC Kentucky’s Resource Center for Environmental Sustainability
KEEPS On-site Energy Assessment Form (Water Heating & Fixtures)
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KPPC Kentucky’s Resource Center for Environmental Sustainability
Determining Efficiency of Systemby AHRI
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KPPC Kentucky’s Resource Center for Environmental Sustainability
Determining Efficiency of Systemby AHRI slide 2
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KPPC Kentucky’s Resource Center for Environmental Sustainability
Determining Efficiency of Systemby AHRI slide 3
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KPPC Kentucky’s Resource Center for Environmental Sustainability
Determining Efficiency of Systemby AHRI slide 4
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KPPC Kentucky’s Resource Center for Environmental Sustainability
Determining Efficiency of Systemby Serial Number
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KPPC Kentucky’s Resource Center for Environmental Sustainability
Energy Factor = heating element energy loss + standby tank loss• Residential-size tanks only (about 75 gal. or less)• EF is determined by test procedure with 6 equal draws of hot water over
a 24-hour time period totaling 64.3 gallons
Thermal Efficiency = heating element energy loss• Commercial-size tanks only (about 75 gal. or more)• TE is determined strictly by the energy loss in the water heating process
—commercial water usage varies widely between commercial sectors and therefore a typical daily hot water draw can not be assumed
• Tankless systems = 0.85 – 0.98 EF/TE
For calculating purposes, we will assume that EF is “18” less than TE.
Energy Factor vs. Thermal Efficiency
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12KPPC Kentucky’s Resource Center for Environmental Sustainability
Completed KEEPS Water Heating Tool
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KPPC Kentucky’s Resource Center for Environmental Sustainability
Maintenance (Flushing)
Recommended at least annually
Reduces wear on anode
Increases transfer efficiency
Increased tank capacity
Increased life expectancy
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KPPC Kentucky’s Resource Center for Environmental Sustainability
Temperature Reduction
Cost = $0
3-5% annual energy cost savings per 10°F reduction http://www.energysavers.gov
Payback = Immediate
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KPPC Kentucky’s Resource Center for Environmental Sustainability
Timer Applications
Electric water heaters• Reduced tank standby loss• Installed cost = $100 per timer• Annual savings = $50/timer• Payback = 2 years
Recirculation pump• Reduced pipe standby loss• Installed cost = $100 per timer• Annual savings = > $100• Payback = < 1 year
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KPPC Kentucky’s Resource Center for Environmental Sustainability
Expected life = 15 years
Tankless unit cost = $2,500 (.96 EF)
Heat pump unit cost = $2,500 (2.25 COP)
Cost = $9,000 for solar
Simple payback (heat pump) = 1-5 years
Simple payback (tankless) = 1-5 years
Simple payback (solar) = 12 years
Water Heater Replacement
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KPPC Kentucky’s Resource Center for Environmental Sustainability
• Locate “Water Heating” in the KEEPS Assessment Report and modify respective figures and other necessary words/sentences for your specific school.
• Modify the inset boxes with the results calculated from the KEEPS Water Heating Tool.
KEEPS Report Input
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18KPPC Kentucky’s Resource Center for Environmental Sustainability 18
Resources
• Available for download from the KEEPS Toolkit Library• http://www.kppc.org/KEEPS
J.B. Speed School of Engineering University of Louisville
End of Presentation
(502) 852-0965
www.kppc.org/KEEPS
Kentucky Energy Efficiency Program for Schools
KEEPS is funded by the American Recovery and Reinvestment Act through the combined efforts of the Kentucky Department for Energy Development and Independence, the U.S. Department of Energy and KPPC.