Feasibility of an unconventional heat-flow-measuring technique to determine coefficient of performance on installed heat pumps
Abstract
Tests were performed on two split residential heat pump systems in the laboratory to determine the suitability of an unconventional heat flow measuring technique proposed for use in an instrument that determines the coefficient of performance of installed heat pumps. This technique uses the ratio of measured heat flow to measured temperature difference in the resistance heating mode to calculate heat flow in the refrigerant heating model form the measured temperature difference during normal heat pump operation. Distance of the supply air temperature sensor from the indoor unit and resistance heater power level were found to be significant parameters that could be controlled to minimize error. Accuracy of the proposed heat flow measuring technique of units in field service was judged to be within 5%.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- January 1983
- Bibcode:
- 1983STIN...8326035B
- Keywords:
-
- Heat Measurement;
- Heat Pumps;
- Heat Transmission;
- Accuracy;
- Coefficients;
- Feasibility Analysis;
- Residential Energy;
- Fluid Mechanics and Heat Transfer