Performance evaluation method of solar-assisted heat pump water heater
Journal
Applied Thermal Engineering
Journal Volume
27
Journal Issue
2-3
Pages
568-575
Date Issued
2007
Author(s)
Lee C.P.
Abstract
The present study derives a simple linear correlation for the performance evaluation of different solar-assisted heat pump water heater (ISAHP). The correlation was derived from the principle of energy conservation with some simplifications. The correlation is then verified using the long-term outdoor field test data of four different ISAHP. The problems of seasonal repeatability and method of data scattering were examined. From that, a standard performance test method is proposed. The test method suggests that only the measurement of instantaneous solar incident radiation on horizontal surface, ambient temperature, hot water temperature in the storage tank, total mass of water in the storage tank and total power input to the ISAHP are required. It is suggested to select the value of COP at Tf - Ta,ave = 15 °C as the characteristic COP for performance comparison of ISAHP. It is found from the test results that the same performance correlation holds for ISAHP operating with single or dual energy source. © 2006 Elsevier Ltd. All rights reserved.
Subjects
Heat pump; Solar energy; Solar-assisted heat pump
SDGs
Other Subjects
Performance correlation; Solar assisted heat pumps; Solar incident radiation; Measurement theory; Scattering; Solar energy; Water heaters; Heat pump systems
Type
journal article