Improvement on the Flow of Two-Stage Temperatures Refrigerator Using Auto Cascade Cycle and Analysis of the Performance

任挪颖; 晏刚; 颜俊; 吴业正

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Improvement on the Flow of Two-Stage Temperatures Refrigerator Using Auto Cascade Cycle and Analysis of the Performance

更新时间：2025-12-08

- Improvement on the Flow of Two-Stage Temperatures Refrigerator Using Auto Cascade Cycle and Analysis of the Performance
- Vol. 41, Issue 5, Pages: 549-552+566(2007)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TB657.4
- Online First：10 May 2007，
  
  Published：2007
- 稿件说明：
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任挪颖, 晏刚, 颜俊, et al. Improvement on the Flow of Two-Stage Temperatures Refrigerator Using Auto Cascade Cycle and Analysis of the Performance[J]. 2007, 41(5): 549-552+566.
DOI：

任挪颖, 晏刚, 颜俊, et al. Improvement on the Flow of Two-Stage Temperatures Refrigerator Using Auto Cascade Cycle and Analysis of the Performance[J]. 2007, 41(5): 549-552+566. DOI：

摘要

针对传统双温冰箱制冷循环存在的不足

提出了自复叠双温冰箱循环

在以前设计流程的基础上研究了4种流程改进方案

并分析了换热器不同布置方式、不同换热效果和分凝分离级数对冰箱性能的影响.模拟计算结果表明:在冷藏室蒸发器前增加逆流换热器只能降低冷藏室蒸发器的温度而不能提高系统性能系数(C

COP

); 在冷冻室蒸发器前增加逆流换热器可以提高系统C

COP

; 在气液分离器前增加逆流换热器可以通过提高气液分离效率来改善系统性能

但C

COP

提高不大; 采用两级分凝分离方式可以较好地提高气液分离效率

降低压缩机的压力比

提高系统C

COP

也达到了改进系统性能的目的

但流程较复杂.这4种改进流程从不同方面改善了循环工作参数

为改善实际装置的系统性能提供了理论基础.

Abstract

The auto-cascade refrigeration cycle for two-stage temperature refrigerator was proposed and four kinds of modified flow paths were studied. The influence of different locations and efficiency of a heat exchanger and different separating steps on performance of the refrigerator was also analyzed. The results of simulating calculation show that the evaporating temperature of fridge chamber is reduced but the coefficient of performance(COP)is not increased when a counterflow heat exchanger is set ahead of the evaporator of fridge chamber; the COP is improved when the heat exchanger is set ahead of the evaporator of freezer chamber; the vapor-liquid separating efficiency is improved but the COP is not increased significantly when the heat exchanger is set ahead of the vapor-liquid separator. Moreover

the vapor-liquid separating efficiency can be improved by using two steps dephlegmation and separation

and thus the pressure ratio of the compressor is decreased and the COP is increased

but the flow path of the refrigerator is more complex.

关键词

Keywords

references

吴业正.制冷与低温技术原理[M].北京:高等教育出版社,2004.

韩润虎.自然复叠系统与低温制冷[J].制冷学报,1999(4):59-61.

Han Runhu. Autocascade system and low temperature refrigeration [J]. Journal of Refrigeration, 1999(4):59-61.

晏刚,任挪颖,徐荣吉,等.船舶多温冷库新型自复叠制冷循环的研究[J].西安交通大学学报,2006,40(5):526-538.

Yan Gang, Ren Nuoying, Xu Rongji, et al. Studies on a new type of auto-refrigerating cascade cycle for marine multi stage temperature refrigerator[J]. Journal of Xi'an Jiaotong University,2006, 40(5):526-538.

Agnew B, Ameli S M. A finite time analysis of a cascade refrigeration system using alternative refrigerants [J].Applied Thermal Engineering, 2004(24):2557-2565.

Somasundaram P, Dinakaran R, Iniyan S. Exergy based refrigerant selection and simulation of auto refrigeration cascade(ARC)system [J]. International Journal of Exergy,2004,1(1):60-80.

Kim S G, Kim M S. Experiment and simulation on the performance of an auto cascade refrigeration system using carbon dioxide as a refrigerant[J].International Journal of Refrigeration,2002(25):1093-1101.

刘建丽,公茂琼,吴剑峰,等.一种新型分凝分离式混合工质内复叠节流制冷机的实验研究[J].低温与超导,2001,29(2):6-10.

Liu Jianli, Gong Maoqiong, Wu Jianfeng, et al. Experimental research on a new type of mixed-refrigerant fractionation refrigeration cycle [J]. Cryogenics and Superconductivity, 2001, 29(2):6-10.

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