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Prepared by: Reviewed and Approved by: Robert A. Davis Emanuel G. D’Albora Senior Mechanical Engineer Supervising Mechanical Engineer 491-09.17.doc ii
CONTENTS EXECUTIVE SUMMARY .......................................................................................................................... v ACKNOWLEDGMENTS ........................................................................................................................... vi INTRODUCTION ........................................................................................................................................ 7 Background............................................................................................................................................... 7 Prior Research........................................................................................................................................... 7 Objectives ................................................................................................................................................. 7 METHODOLOGY ....................................................................................................................................... 8 Thermodynamics and Terminology.......................................................................................................... 8 Testing Standards...................................................................................................................................... 9 Test Apparatus .......................................................................................................................................... 9 Measurements and Instrumentation ........................................................................................................ 10 Data Acquisition System......................................................................................................................... 10 Test Conditions ....................................................................................................................................... 11 Test Procedure ........................................................................................................................................ 11 RESULTS ................................................................................................................................................... 12 Test Units................................................................................................................................................ 12 First Hour Rating .................................................................................................................................... 15 Energy Factor.......................................................................................................................................... 16 Temperature Sensitivity .......................................................................................................................... 18 Cooling Effect......................................................................................................................................... 19 Economics............................................................................................................................................... 20 CONCLUSIONS......................................................................................................................................... 21 Recommendations for Follow-on Activities ........................................................................................... 21 REFERENCES ........................................................................................................................................... 22 APPENDIX...............................................................................................................................................A-1 LIST OF TABLES Table 1: Summary of First Hour Rating / Energy Factor Test Results........................................................ v Table 2: DOE Standard Energy Factor Test Conditions for HPWHs........................................................ 11 Table 3: Summary of Test Units................................................................................................................ 12 Table 4: Test Unit Rated Performance....................................................................................................... 13 Table 5: First Hour Rating Results ............................................................................................................ 15 Table 6: Energy Factor Test Results.......................................................................................................... 17 Table 7: Instrumentation List...................................................................................................................A-3 491-09.17.doc iii
Page 1: Laboratory Testing of Residential H
Page 5 and 6: EXECUTIVE SUMMARY A limited evaluat
Page 7 and 8: INTRODUCTION Background While the m
Page 9 and 10: should be kept high by absorbing he
Page 11 and 12: output modules for the mixing valve
Page 13 and 14: Manufacturer Product Line Table 4:
Page 15 and 16: maximum for the heat pump, which ap
Page 17 and 18: Model AirTap A7 Operating Mode Tabl
Page 19 and 20: Comparing the power demand at a tan
Page 21 and 22: CONCLUSIONS In this test program, t
Page 23 and 24: Appendix APPENDIX 491-09.17.doc A-1
Page 25 and 26: Appendix Table 7: Instrumentation L
Page 27 and 28: Appendix °F °F 140 130 120 110 10
Page 29 and 30: Appendix °F °F 140 130 120 110 10
Page 31 and 32: Appendix Recovery Efficiency Recove
Page 33: Appendix Net Cooling Effect (Ton-ho

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