Research progress on frost-free air source heat pump technology |
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| Authors: | ZHANG Yi ZHANG Guanmin LENG Xueli QU Xiaohang TIAN Maocheng |
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| Affiliation: | 1.School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, China;2.Department of Energy and Power Engineering, Shandong University of Technology, Zibo 255000, Shandong, China |
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| Abstract: | Coupling the air dehumidification equipment on the traditional air source heat pump (ASHP) unit to achieve its frost-free continuous high-efficiency and stable operation is conducive to the popularization and application of ASHP in clean heating in low temperature and high humidity areas. Hence, based on the analyses of three types of frosting processes, the principles of various frost-free ASHP technologies were summarized and divided into three categories in the present paper as follows: frost-free ASHP technology with integrated solid desiccant dehumidification, frost-free ASHP technology coupling with liquid desiccant dehumidification, other frost-free ASHP technologies. Then the research status of the first two frost-free ASHP technologies was reviewed, respectively. Finally, the problems and limitations of these frost-free technologies were pointed out, and the research recommendations of various methods and their development priorities under different environmental conditions were given, respectively. Meanwhile, it was suggested that all aspects of researches affecting the investment cost and operation performance of frost free heat pump system should be mainly carried out, and thereby develop the multi-functional frost free ASHP technology with high performance and small regional restrictions in the future. |
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| Keywords: | heat pump frost-free dehumidification regeneration heat-source tower heat and mass transfer |
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