Heat-pipe enhanced solar-assisted heat pump water heater

A heat-pipe enhanced solar-assisted heat pump water heater (HPSAHP) is studied. HPSAHP is a heat pump with dual heat sources that combines the performance of conventional heat pump and solar heat pipe collector. HPSAHP operates in heat-pump mode when solar radiation is low and in heat-pipe mode with...

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Veröffentlicht in:	Solar energy 2005-01, Vol.78 (3), p.375-381
Hauptverfasser:	Huang, B.J., Lee, J.P., Chyng, J.P.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Devices using thermal energy Efficiency Energy Energy. Thermal use of fuels Equipments, installations and applications Exact sciences and technology Heat pump Heat pumps Natural energy Pipes Prototypes Pumps Solar energy Solar heat pump Solar thermal Solar thermal conversion Solar water heater Water heaters
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Beschreibung
Zusammenfassung:	A heat-pipe enhanced solar-assisted heat pump water heater (HPSAHP) is studied. HPSAHP is a heat pump with dual heat sources that combines the performance of conventional heat pump and solar heat pipe collector. HPSAHP operates in heat-pump mode when solar radiation is low and in heat-pipe mode without electricity consumption when solar radiation is high. HPSAHP can thus achieve high energy efficiency. A prototype was designed and built in the present study. An outdoor test for a HPSAHP in the present study has shown that COP of the hybrid-mode operation can reach 3.32, an increase of 28.7% as compared to the heat-pump mode COP (2.58).
ISSN:	0038-092X 1471-1257
DOI:	10.1016/j.solener.2004.08.009