Experimental study on startup dynamic characteristics of R1150/R600a auto-cascade refrigeration cycle

被引：0

作者：

Tan Y. ^{[1
]}

Liu X. ^{[1
]}

Wang L. ^{[1
]}

Huang L. ^{[1
]}

Li X. ^{[1
]}

Wang Z. ^{[1
]}

机构：

[1] Institute of Building Energy and Thermal Science, Henan University of Science and Technology, Henan, Luoyang

来源：

Huagong Xuebao/CIESC Journal | 2023年 / 74卷

关键词：

auto-cascade refrigeration; dephlegmator; mixed-refrigerant; non-azeotropic; startup dynamic characteristics;

D O I：

10.11949/0438-1157.20221631

中图分类号：

学科分类号：

摘要：

An experimental bench of auto-cascade refrigeration cycle with dephlegmator was set up. The startup dynamic characteristics of the auto-cascade refrigeration cycle with dephlegmator and that of the traditional autocascade refrigeration cycle under different evaporation pressure and composition ratio were analyzed experimentally using the environment-friendly non-azeotropic mixed refrigerant R1150/R600a. The results showed that the refrigeration temperatures of both cycles decreased and the compressor exhaust pressures increased with the decrease of evaporative pressure, and the temperature drop of auto-cascade refrigeration cycle with dephlegmator was larger, the lowest evaporator inlet temperature reached -73.8℃ while the evaporation pressure was 280 kPa. After startup, the auto-cascade refrigeration cycle with dephlegmator can reach stable refrigeration temperature faster, the temperature drop rate of cryogenic chamber was faster, and the refrigeration temperature was lower. When the R1150/R600a mass fraction ratio was 0.3∶0.7, the evaporator inlet temperature reached -77.2℃, 5.6℃ lower than the traditional auto-cascade refrigeration cycle. With the increase of the mass fraction of low boiling point component, the cooling rates of both cycles were faster. However, the compressor exhaust temperature increased. The compressor discharge temperature of the conventional auto-cascade refrigeration cycle was 25.0—36.0℃ lower than that of the auto-cascade refrigeration cycle with dephlegmator. © 2023 Chemical Industry Press. All rights reserved.

引用

页码：213 / 222

页数：9

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