Chemical Industry and Engineering Progree ›› 2015, Vol. 34 ›› Issue (08): 3194-3201.DOI: 10.16085/j.issn.1000-6613.2015.08.046

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Techno-economic analysis of two-staged compression and cascade compression refrigeration system

GUO Yaojun1,2, XIE Jing1,2, ZHU Shixin1,2, WANG Jinfeng1,2   

  1. 1 College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China;
    2 Shanghai Engineering Research Center of Aquatic Product Processing and Preservation, Shanghai 201306, China
  • Received:2015-03-11 Revised:2015-04-02 Online:2015-08-05 Published:2015-08-05

双级压缩与复叠式压缩制冷系统的技术经济分析

郭耀君1,2, 谢晶1,2, 朱世新1,2, 王金锋1,2   

  1. 1 上海海洋大学食品学院, 上海 201306;
    2 上海水产品加工与贮藏工程技术研究中心, 上海 201306
  • 通讯作者: 谢晶,教授,博士,博士生导师,研究方向为食品工程。E-mail jxie@shou.edu.cn。
  • 作者简介:郭耀君(1987—),男,硕士研究生,研究方向为制冷工程。E-mail 616885141@qq.com。
  • 基金资助:
    国家农业成果转化资金项目(2013GB2C000156)及上海市科委项目(13dz1203702)。

Abstract: In order to choose a suitable method for ultra-low temperature refrigeration system from two-staged compression and cascade compression, the two refrigeration systems' technical characteristics were analyzed comparatively using theoretical calculations of two-stage and cascade refrigeration system. Both theoretical displacement and theoretical coefficient of the two systems were compared in the economic aspect. Results indicated that compared to two-stage system, compression ratio and exhaust temperature of cascade system were lower and suction pressure and cooling coefficient were higher. At condensing temperature 40℃ and evaporation temperature -65℃, the energy consumption reduction of cascade system can reach to 15.13%, indicating that the performance of cascade system could be better in the ultra-low temperature condition.

Key words: two-stage compression, cascade compression, thermodynamics, performance analysis, compressor

摘要: 为了探究双级压缩制冷系统与复叠式压缩制冷系统哪种更适合超低温制冷装置,通过对双级压缩系统和复叠式压缩制冷系统采用循环热力计算的方法,比较分析了双级压缩与复叠式压缩制冷系统的技术特性。同时从经济性的角度,对两种制冷方案的理论输气量、制冷系数、初投资、实际运行费用进行了对比分析。结果表明:在相同的工况下,复叠式系统的压缩比、排气温度和理论输气量均低于双级压缩系统,而复叠式系统的吸气压力和制冷系数高于双级压缩系统。在冷凝温度为40℃、蒸发温度为-65℃时,采用复叠压缩实际节能可达15.13%,即在超低温工况下复叠式系统更有前景。

关键词: 双级压缩, 复叠式压缩, 热力学, 性能分析, 压缩机

CLC Number: 

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