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制冷剂喷入技术在空气源热泵中的应用研究现状
王超1, 赵蕾1, 李延2, 杨柳3
0
(1.西安建筑科技大学环境与市政工程学院;2.广州哈思新能源科技有限公司;3.西安建筑科技大学建筑学院西安)
摘要:
本文分析了常规空气源热泵在低温与高温工况下性能显著下降的原因,简述了制冷剂喷入技术优化空气源热泵性能的基本原理及其系统类型。通过对现有研究领域的分类,以及对同领域内不同应用形式的对比,从系统及部件两个层面阐明了制冷剂喷入技术的研究现状和进展。总结现有制冷剂喷入技术的研究成果可得出:喷气增焓技术可显著强化空气源热泵系统的低温制热性能,而且越来越多的研究提出采用制冷剂喷入技术的新系统形式并分析其对热泵系统制热性能的提升作用,但对制冷工况下的性能研究尚显欠缺。最后,结合制冷剂喷入技术发展的热点和难点,对制冷剂喷入技术的发展进行了展望。
关键词:  空气源热泵  喷气增焓技术  喷液技术  准二级压缩  经济器  性能优化  工质替代
DOI:
投稿时间:2018-07-26  修订日期:2018-10-07  
基金项目:国家科技支撑计划(2014BAJ01B01)资助项目。
Review of Application and Research Situations on Refrigerant Injection Technology in Air Source Heat Pump
Wang Chao1, Zhao Lei1, Li Yan2, Yang Liu3
(1.School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology;2.Guangzhou Hasi New Energy Science and Technology Co., Ltd.;3.School of Architecture, Xi'an University of Architecture and Technology)
Abstract:
The principle and various system types for implementing refrigerant injection technology, such as the liquid injection cycle, subcooler vapor injection cycle, and flash tank vapor injection cycle, are introduced to optimize the performance of air source heat pumps operating under low-temperature and high-temperature conditions. A summary of research conducted in line with the various refrigerant injection technologies aimed at improving the system performance and related structural and operational parameter optimizations, both on the systemand component level, was provided herein. Moreover, experiment and simulation studies on alternative refrigerant on R32, R410A, R417A, R1234yf, and R290/R600a for various types of system with refrigerant injection technology were also reviewed. The progress of research for compressors’ structural improvement was additionally covered, involving those of scroll and rotary compressors. A commonly agreed point in vapor injection technology is its ability to enhance the heating performance of air source heat pump operating at low temperatures. Nowadays, an increasing number of researches are focusing on how new forms of system with refrigerant injection technology can improve the heating performance of heat pumps. However, seldom deal on enhancing the cooling performance operation at high temperatures can be found. Finally, in terms of the development situations and difficulties encountered in implementing refrigerant injection technology, the research and development directions of refrigerant injection technology are envisioned.
Key words:  air source heat pump  vapor injection  liquid injection  quasi-two-stage compression  subcooler  performance optimization  refrigerant substitution

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