单/双级切换蒸气压缩制冷系统的应用分析

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英文篇名：Application Analysis of Single-stage/Double-stage Switching Vapor Compressor Refrigeration System 作者：洪谢文 ; 李征涛 ; 朱伟明 英文作者：HONG Xie-wen;LI Zheng-tao;ZHU Wei-ming;School of Energy and Power Engineering,University of Shanghai for Science and Technology; 关键词：宽工况 ; 变频 ; 制冷性能系数 ; 切换温度 英文关键词：wide operating condition;;frequency conversion;;coefficient of refrigeration performance;;switching temperature 中文刊名：FCYY 英文刊名：Building Energy Efficiency 机构：上海理工大学能源与动力工程学院; 出版日期：2019-05-25 出版单位：建筑节能 年：2019 期：v.47;No.339 语种：中文; 页：FCYY201905006 页数：5 CN：05 ISSN：21-1540/TU 分类号：33-36+77

摘要

针对现有宽工况制冷实验室制冷系统,存在系统复杂、占用空间大等缺点,设计了一套单/双级切换蒸气压缩制冷系统,能够实现-40～40℃范围的室内温度调节。介绍了制冷系统的工作原理,其中压缩机采用了变频技术,并且在30、40、50 Hz频率下进行了变工况实验。结果表明,该系统能够稳定运行,在室内温度-40℃时COP也能达到1. 12,且频率越低COP越大;并且以最大COP为优化目标,得出最佳切换室内温度为-18℃。此单/双级切换制冷系统已在企业成功投入使用,可为类似切换制冷系统的研究提供借鉴。
        Aiming at the disadvantages of the existing wide-condition refrigeration laboratory refrigeration system,such as complex system and large occupied space,a single-stage/double-stage switching vapor compression refrigeration system is designed,achieving temperature regulation in the range of-40 ℃ to 40 ℃. The working principle of the refrigeration system is introduced,in which the compressor adopts variable frequency technology,and the off-design performance was studied at 30 Hz,40 Hz and 50 Hz. The results show that the system can operate stably. The coefficient of refrigeration performance( COP) can reach 1. 12 at-40 ℃ ambient temperature,and the lower the frequency,the greater the COP. And with the maximum COP as the optimization goal,the optimal switching ambient temperature is-18 ℃. This single/double-stage switching refrigeration system has been successfully put into use in enterprises,which can provide reference for the similar switch refrigeration system research.

引文

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