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