Improving the frosting and defrosting performance of air source heat pump units: review and outlook

被引：0
|
作者：
Song M. [1 ]
Dong J. [2 ]
Wu C. [3 ]
Jiang Y. [2 ]
Qu M. [4 ]
机构：
[1] School of Materials and Energy, Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, Guangdong University of Technology, Guangzhou
[2] Department of Building Thermal Energy Engineering, Harbin Institute of Technology, Harbin
[3] Building Energy Research Centre, Guangzhou HKUST Fok Ying Tung Research Institute, Guangzhou
[4] School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai
来源：
Wu, Chili (chiliwu@ust.hk) | 1600年 / Taylor and Francis Asia Pacific卷 / 24期
基金：
中国国家自然科学基金;
关键词：
Air source heat pump (ASHP); control strategy; defrosting; frost retardation; multi-circuit outdoor coil;
D O I：
10.1080/1023697X.2017.1313134
中图分类号：
学科分类号：
摘要：
When air source heat pump (ASHP) units operate in heating mode at low temperatures in high humidity environments, frost forms and accumulates on the surface of its outdoor coils. This frost layer adversely degrades the operating efficiency of ASHP units rapidly, and can even result in sudden shutdown. Due to this operational problem, many researchers have conducted studies on frost-retardation measures. Since the frost that is present on the ASHP unit after shutdown has to be removed, defrosting becomes necessary. Among several reported defrosting methods, such as compressor shutdown defrosting, electric heating defrosting, hot water spray defrosting and hot gas bypass defrosting, the most popular method is reverse cycle defrosting. In addition, defrosting initiation and termination control play an important role in the frosting and defrosting cycle. Due to a scarcity of reviews of the literature on improving the frosting and defrosting performance of ASHP units, this paper provides a comprehensive review of experimental and modelling studies which explore this topic. This review can be used for guiding the future design and control strategy optimisation for ASHP units. © 2017 The Hong Kong Institution of Engineers.
引用
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页码：88 / 98
页数：10
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