Effect of load pattern on solar-boosted heat pump water heater performance

Anderson, T.N. and Morrison, G.L. 2007, Effect of load pattern on solar-boosted heat pump water heater performance, Solar energy, vol. 81, no. 11, pp. 1386-1395, doi: 10.1016/j.solener.2007.01.018.

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Title Effect of load pattern on solar-boosted heat pump water heater performance
Author(s) Anderson, T.N.
Morrison, G.L.
Journal name Solar energy
Volume number 81
Issue number 11
Start page 1386
End page 1395
Publisher Pergamon
Place of publication Oxford, England
Publication date 2007-11
ISSN 0038-092X
Keyword(s) heat pump
water heater
Summary The performance of a solar-boosted heat pump water heater (HPWH) operating under full load and part load conditions was determined in an outdoor experimental study. The system utilised flat unglazed aluminium solar evaporator panels to absorb solar and ambient energy. Absorbed energy was transferred to the water tank by means of the heat pump and a wrap around condenser coil on the outside of the tank. The system COP was found to be in the range of 5–7 under clear daytime conditions and 3–5 under clear night-time conditions. Using part load testing of the HPWH system it was found that concentrating the coils in the lower portion of the tank could increase the efficiency of the condenser coil. It was also shown that there exists a generalised linear relationship that can be used to describe the system COP in terms of the temperature difference between the water in the storage tank and the ambient air.
Language eng
DOI 10.1016/j.solener.2007.01.018
Field of Research 091399 Mechanical Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2007, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30023018

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