J.B. Speed School of Engineering University of Louisville KEEPS Energy Management Toolkit Step 2: Assess Performance & Opportunities Toolkit 2H: Water Heating Kentucky Energy Efficiency Program for Schools KEEPS Energy Management Toolkit Step 2 Assess Performance & Opportunities Toolkit 2 H Water Heating

2 KPPC Kentucky’s Resource Center for Environmental Sustainability KEEPS Energy Management Toolkit Toolkit 2H: Water Heating KEEPS Energy Management Toolkit Toolkit 2 H Water Heating 2

3 KPPC Kentucky’s Resource Center for Environmental Sustainability 3 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

4 KPPC 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 4

5 KPPC Kentucky’s Resource Center for Environmental Sustainability KEEPS On-site Energy Assessment Form (Water Heating & Fixtures) 5

KPPC Kentucky’s Resource Center for Environmental Sustainability Determining Efficiency of System by AHRI 6

KPPC Kentucky’s Resource Center for Environmental Sustainability Determining Efficiency of System by AHRI slide 2 7

KPPC Kentucky’s Resource Center for Environmental Sustainability Determining Efficiency of System by AHRI slide 3 8

KPPC Kentucky’s Resource Center for Environmental Sustainability Determining Efficiency of System by AHRI slide 4 9

KPPC Kentucky’s Resource Center for Environmental Sustainability Determining Efficiency of System by Serial Number 10

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 11

12 KPPC Kentucky’s Resource Center for Environmental Sustainability Completed KEEPS Water Heating Tool 12

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 13

KPPC Kentucky’s Resource Center for Environmental Sustainability Temperature Reduction Cost = $0 3-5% annual energy cost savings per 10 ° F reduction Payback = Immediate 14

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 15

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 16

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 17

18 KPPC Kentucky’s Resource Center for Environmental Sustainability 18 Resources Available for download from the KEEPS Toolkit Library

J.B. Speed School of Engineering University of Louisville End of Presen tation (502) 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.