DOE EERE Research Reports

Advanced Appliance Research

Water Heaters

Heat Pump Water Heaters

Demonstration of a Heat-Pump Water Heater: Volume 2 Final Report
June 1981

Energy Utilization Systems, Inc.
365 Plum Industrial Court
Pittsburgh, Pennsylvania 15239

Abstract: Energy Utilization Systems, Inc. (EUS), has developed an elecric heat pump water heater for residential applications. A heat pump water heater is a device that works like a room air conditioner except that it pumps heat from a room, basement, garage, etc., into an attached water tank instead of rejecting this heat out-of-doors. The development of this device was the first phase of work sponsored by the U.S. Department of Energy through Oak Ridge National Laboratory under contract number 7321.

The second phase of work involved the field demonstration of this device. Eighty-five heat pump water heaters were installed in single-family homes located in the service territories of 20 geographically and climatically dispersed electric utilities. The objective of this phase was to demonstrate the reliability and operating efficiency of the device. Utility personnel collected operating data and forwarded it to EUS on a monthly basis. These datea were analyzed and a monthly coefficient of performance (COP) was calculated for each unit.

This report details the results obtained from this field demonstration project.

Keywords: heat pump water heater, field test, energy efficiency


National Technology Information Service
U.S. Department of Commerce
5285 Port Royal Road
Springfield, Virginia 22161

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