Review of the advances in solar-assisted air source heat pumps for the domestic sector

Li Wei Yang, Rong Ji Xu, Nan Hua, Yu Xia, Wenbin Zhou, Tong Yang, Yerzhan Belyayev, Hua Sheng Wang

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)


Solar assisted air source heat pump shows great potential as a promising energy-saving heating technology, which integrates solar collector and air source heat pump. It is widely considered for supplying hot water, space heating and/or space cooling in the domestic sector. The performance of solar assisted air source heat pumps can be evaluated in system level by parameters such as coefficient of performance, seasonal performance factor, energy consumption, solar fraction as well as initial and operating costs, and in component level by parameters such as efficiencies of solar collection and thermal energy storage. Their performances are affected by many factors such as system configuration, components size, working fluid, working conditions and weather conditions. This paper presents a comprehensive review on the recent advances in solar assisted air source heat pump for the domestic sector in terms of system configuration, solar collectors, thermal energy storage, defrosting method and the perspective areas of further investigations. The results of this review confirm that research is still required to improve the performance of such a combined system and reduce initial cost compared with existing heating systems based on hydrocarbon combustion. The information presented in this paper is beneficial to the researchers, small and medium-sized enterprises suppling renewable energy system technologies, heating engineers and service workers, energy policy and decision makers, environmental activists and communities.
Original languageEnglish
Article number114710
Number of pages34
JournalEnergy Conversion and Management
Early online date16 Sept 2021
Publication statusPublished - 1 Nov 2021


  • Solar-assisted air source heat pump
  • Coefficient of performance
  • System configuration
  • Solar collector
  • Thermal energy storage
  • Defrosting


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