A simulation study on the operating performance of a solar-air source heat pump water heater

Guoying Xu, Xiaosong Zhang, Shiming Deng

Research output: Journal article publicationJournal articleAcademic researchpeer-review

106 Citations (Scopus)


A simulation study on the operating performance of a new type of solar-air source heat pump water heater (SAS-HPWH) has been presented. The SAS-HPWH used a specially designed flat-plate heat collector/evaporator with spiral-finned tubes to obtain energy from both solar irradiation and ambient air for hot water heating. Using the meteorological data in Nanjing, China, the simulation results based on 150 L water heating capacity showed that such a SAS-HPWH can heat water up to 55 °C efficiently under various weather conditions all year around. In this simulation study, the influences of solar radiation, ambient temperature and compressor capacity on the performance of the SAS-HPWH were analyzed. In order to improve the overall operating performance, the use of a variable-capacity compressor has been proposed.
Original languageEnglish
Pages (from-to)1257-1265
Number of pages9
JournalApplied Thermal Engineering
Issue number11-12
Publication statusPublished - 1 Aug 2006


  • Energy efficiency
  • Heat pump
  • Simulation
  • Solar energy
  • Water heater

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Mechanical Engineering

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