Heat pump water heater laboratory test and design model validation

Technical Report · Sat Mar 01 00:00:00 EST 1986

OSTI ID:5902585

Zimmerman, K H

A residential separated-type heat pump water heater (HPWH) unit was tested in a laboratory under controlled environmental conditions. Steady-state tests were conducted over a range of ambient temperatures, relative humidities, and inlet water temperatures. For the ambient temperature rise from 10 to 38/sup 0/C (50 to 100/sup 0/F), the evaporator capacity increased 62%, the condenser capacity increased 67%, and the coefficient of performance (COP) improved 34% (from 1.89 to 2.54). As the HPWH condenser inlet water temperature increased from 46 to 54/sup 0/C (115 to 130/sup 0/F) while the ambient temperature remained 23/sup 0/C (73/sup 0/F), the condenser capacity decreased 4% and the COP declined 14% (from 2.21 to 1.89). Test data were used to form a data base on HPWH performance which was subsequently used to validate the HPWH design model. The HPWH design model, a computer program derived from the existing ORNL Heat Pump Design Model, was proven to be capable of predicting the performance of the separated-type HPWH system and is intended to be used in studies concerning the improvement of HPWH performance.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5902585
• Report Number(s): ORNL/CON-173; ON: DE86008938
• Resource Relation: Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
WATER HEATERS
HEAT PUMPS
PERFORMANCE TESTING
AMBIENT TEMPERATURE
COEFFICIENT OF PERFORMANCE
COMPUTER-AIDED DESIGN
COMPUTERIZED SIMULATION
FLOW RATE
VALIDATION
APPLIANCES
HEATERS
SIMULATION
TESTING
320100* - Energy Conservation
Consumption
& Utilization- Buildings