Experimental study on R404A/R23 cascade ultra-low temperature refrigeration system

Authors

LIU Han, Shanghai Ocean University College of Food Science and Technology, Shanghai 201306, China; Shanghai Aquatic Products Processing and Storage Engineering Technology Research Center, Shanghai 201306, China; Shanghai Professional Technology Service Platform on
XIE Jing, Shanghai Ocean University College of Food Science and Technology, Shanghai 201306, China; Shanghai Aquatic Products Processing and Storage Engineering Technology Research Center, Shanghai 201306, China; Shanghai Professional Technology Service Platform on
WANG Jinfeng, Shanghai Ocean University College of Food Science and Technology, Shanghai 201306, China; Shanghai Aquatic Products Processing and Storage Engineering Technology Research Center, Shanghai 201306, China; Shanghai Professional Technology Service Platform on

Abstract

Relying on the R404A/R23 cascade ultra-low temperature refrigeration test bench, and using the method of controlling single variable, the evaporation temperature and condensation temperature of the compressor compression ratio, exhaust gas temperature, suction pressure and refrigerant flow rate in the cascade refrigeration cycle were studied. The effect of the refrigeration coefficient. The results showed that when the evaporation temperature was reduced from -50 ℃ to -55 ℃, the system refrigeration coefficient declined the fastest, reaching 2.1%; when the condensation temperature was raised from 28 ℃ to 30 ℃, the system refrigeration coefficient declined the fastest, with 1.7%. And the evaporation temperature dropped by 1 ℃ and the condensation temperature rised by 1 ℃, which had a greater influence on the system performance coefficient. In addition, when the evaporation temperature was -55 ℃, and the condensation temperature was 36 ℃, the compressor discharge temperature reached a maximum of 90 ℃. At this time, the system performance coefficient was at least 1.5, so effectively control the compressor discharge temperature to the system safety and efficient operation is essential.

Publication Date

9-28-2019

First Page

111

Last Page

115,121

DOI

10.13652/j.issn.1003-5788.2019.09.022

Recommended Citation

Han, LIU; Jing, XIE; and Jinfeng, WANG (2019) "Experimental study on R404A/R23 cascade ultra-low temperature refrigeration system," Food and Machinery: Vol. 35: Iss. 9, Article 22.
DOI: 10.13652/j.issn.1003-5788.2019.09.022
Available at: https://www.ifoodmm.cn/journal/vol35/iss9/22

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