Matching-design for inverter air-source heat pump system based on heating load characteristics of civil buildings

Jijin Wang, Dehu Qv, Long Ni*, Jianhua Fan, Weiqiang Kong

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Although the inverter air-source heat pump (IASHP) and composite systems have a characteristic of energy conversion, the design of IASHP and the application of IASHP assisted with additional heat sources are absent based on the relationship between the demand side and supply side. Therefore, this paper proposes a heating load decomposition method to design IASHP with an auxiliary heat source system to offer users heating in severe cold regions. Specifically, the heating load decomposition method divides the heating load of the civil building into three regions by seeking heating energy balance points. It can get an optimal heating energy balance point with the best HSPF and an optimal design heating energy balance point with the best evaluating parameter. On these grounds, we produce an IASHP prototype. The experimental results confirm the superiority of the heating load decomposition method. Compared to the traditional design method, it improves by 6.5%-12.6% of heating capacity and 2.3%-17.4% of COP of IASHP porotype. Besides, the heating performance of IASHP assisted with an electric heating system selected by an optimal heating energy balance point is better than that of an independent IASHP heating system. In contrast, electric heating only pays 6.7% of the heating capacity of the IASHP unit operated at −27.0 °C of ambient temperature.
Original languageEnglish
Article number111952
JournalEnergy and Buildings
Volume260
Number of pages20
ISSN0378-7788
DOIs
Publication statusPublished - 2022

Keywords

  • Demand–supply match
  • Inverter air-source heat pump
  • Heating load decomposition
  • Heating seasonal performance factor
  • Optimal heating energy balance poin

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