DOE EERE Research Reports

Advanced Appliance Research

Water Heaters

Heat Pump Water Heaters

A Comparison of Laboratory and Field-Test Measurements of Heat-Pump Water Heaters
August 1982

W. P. Levins
Oak Ridge National Laboratory
Oak Ridge, Tennessee 37830

Abstract: The Oak Ridge National Laboratory (ORNL) subcontracted Energy Utilization Systems of Pittsburgh, Pennsylvania in 1977 to develop a heat pump water heater (HPWH). After developing the HPWH, a field-test plan was implemented whereby 20 U.S. utilities each received five units for a one-year test period. During the field tests, ORNL tested two of the prototype HPWHs identical to the field-test units in the laboratory. The ORNL experience proved extremely valuable in both realigning the field-test procedures and in analyzing the field-test data. A comparison of the laboratory and the field-test data was excellent on an overall basis but showed differences for parametric temperature sensitivities. Field-test data for the effect of the HPWH on the house heating system were not overly conclusive, but laboratory test data were used to evaluate this effect analytically.

Keywords: heat pump water heater, field test, laboratory test


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Presented at the:
ACEEE 1982 Summer Study
Santa Cruz, California
August 21-28, 1982
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