CO<sub>2</sub>跨临界制冷系统单元件改进的性能研究

李亚强; 龚毅; 彭锦晨

doi:10.3969/j.issn.2095-476X.2014.02.020

March 2014

Article Contents

LI Ya-qiang, GONG Yi and PENG Jin-chen. Performance analysis of CO2 transcritical refrigeration system units' improvement[J]. Journal of Light Industry, 2014, 29(2): 80-86. doi: 10.3969/j.issn.2095-476X.2014.02.020

Citation: LI Ya-qiang, GONG Yi and PENG Jin-chen. Performance analysis of CO2 transcritical refrigeration system units' improvement[J]. Journal of Light Industry, 2014, 29(2): 80-86. doi: 10.3969/j.issn.2095-476X.2014.02.020 shu

Performance analysis of CO₂ transcritical refrigeration system units' improvement

College of Mechanical and Electrical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China

Received Date: 2013-12-04
Available Online: 2014-03-15

Abstract

By adding the internal heat exchanger and bypass valve, the transcritical CO₂ refrigeration sys- tem with dual throttle valve was improved. Through the theoretical analysis and calculation of system performance parameters, it was concluded that:There was an optimum high-pressure P_h,opt, the relationship between the optimum high-pressure (P_h,opt), the gas cooler outlet temperature (T₃) and the evaporation temperature (T_e) was:P_h,opt=0.264 3 T₃-0.008 9 T_e-70.255 4; there was a larger increase in the region lower than the optimum high-pressure when the internal heat exchanger was used,there was little impact on system performance when the bypass valve was used from a theoretical calculation view.
- CO₂ transcritical refrigeration system,
- high side pressure,
- coefficient of system performance
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