- Author
-
Mulroy, W. J.
|
Kelly, G. E.
- Title
- Laboratory Tests of a Residential Unitary Water-Source Heat Pump.
- Coporate
- National Bureau of Standards, Washington, DC
- Sponsor
- Department of Energy, Washington, DC
- Report
-
NBSIR 81-2287,
November 1982,
- Distribution
- Available from National Technical Information Service
- Keywords
-
residential buildings; heat pumps; heating; cooling; heat exchangers; air flow; water flow; flow rate; performance evaluation
- Identifiers
- water source heat pumps
- Abstract
- The performance of a residential heat pump was measured in the laboratory over a broad range of source water temperatures (40F to 90F). Tests were performed in both heating and cooling operational modes and for both steady-state and cyclic operation. For both heating and cooling operations, the unit capacity and coefficient of performance were found to be linear functions of the average of the unit source and outlet water temperatures. In heating, the unit capacity, COP, and part load performance increased with increasing water temperature. In cooling, the unit capacity, COP, and part load performance decreased with increasing water temperature. The measured degradation coefficients ranged from 0.09 to 0.21 for heating and from 0.10 to 0.18 for cooling. An appendix is included in which the effect of the degradation coefficient and of supplemental resistance heat on the unit heating and cooling seasonal performance factors is calculated.