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HPWH Performance Report Table of Contents Table of Contents.........................................................................................................................1 1. Executive Summary ..........................................................................................................1 1.1 Cold Climate Operation ......................................................................................................... 1 1.2 Installation Cost and Complexity ........................................................................................... 2 1.3 Demand Response Potential ................................................................................................... 3 1.4 Impact on Peak Demand ........................................................................................................ 4 2. Overview of Technology ...................................................................................................5 2.1 Sanden CO2 Heat Pump Water Heater ................................................................................... 5 2.2 Rheem Integrated Heat Pump Water Heater ........................................................................... 5 3. Field Testing Results Summary .........................................................................................7 2.1 Energy Savings Summary ....................................................................................................... 1 2.2 Impact of Outside Air Temperature on Performance ............................................................... 2 2.3 Impact of Water Draw Patterns on Performance..................................................................... 3 4. Installation Time and Cost Summary ................................................................................5 5. Sanden Unit Performance .................................................................................................7 5.1 Heat Trace Impact.................................................................................................................. 7 5.2 Impact of Outside Air Temperature on Unit Power ................................................................ 8 6. Rheem Unit Performance ...............................................................................................10 5.1 Use of Backup Heating Elements for Water Heating ............................................................. 10 5.2 Impacts of Ducting Units...................................................................................................... 14 5.3 Energy Consumption by Heating Type ................................................................................. 16 7. Demand Response Potential ........................................................................................... 18 8. Calculations ................................................................................................................... 19 8.1 Water Heating Load............................................................................................................. 19 7.2 Coefficient of Performance ................................................................................................... 19 8.3 Baseline Energy Factors ....................................................................................................... 19 8.4 Hot and Cold Water Temperature Adjustment ..................................................................... 20 9. Assumptions .................................................................................................................. 21 10. Sanden Site Descriptions and Performance ...................................................................... 22 10.1 Rossland Site 1 (Sanden) ...................................................................................................... 22 10.2 Rossland Site 2 (Sanden) ...................................................................................................... 28 10.3 Rossland Site 3 (Sanden) ...................................................................................................... 32 10.4 Kelowna Site 1 (Sanden) ...................................................................................................... 38 10.5 Kelowna Site 2 (Sanden) ...................................................................................................... 43 10.6 Vancouver Island Site 2 (Sanden) ......................................................................................... 46 10.7 Vancouver Island Site 3 (Sanden) ......................................................................................... 48 11. Rheem Site Descriptions and Performance.......................................................................51 11.1 Kelowna Site 3 (Rheem) ....................................................................................................... 51 11.2 Kelowna Site 4 (Rheem) ....................................................................................................... 55 11.3 Vancouver Island Site 1 (Rheem) .......................................................................................... 60 11.4 Vancouver Island Site 4 (Rheem) .......................................................................................... 63 11.5 Vancouver Island Site 5 (Rheem) .......................................................................................... 66 12. Issues Identified..............................................................................................................69 13. Conclusion ..................................................................................................................... 70 14. Appendix ....................................................................................................................... 71PDF Image | CO2 Integrated Heat Pump Water Heater
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