三种跨临界CO<sub>2</sub>制冷循环的性能对比研究

龚毅; 彭锦晨; 吴学红; 张文慧

doi:10.3969/j.issn.2095-476X.2015.3/4.022

September 2015

Article Contents

GONG Yi, PENG Jin-chen, WU Xue-hong and et al. Numerical study for three kinds of transcritical CO2 refrigeration cycle[J]. Journal of Light Industry, 2015, 30(3-4): 98-102. doi: 10.3969/j.issn.2095-476X.2015.3/4.022

Citation: GONG Yi, PENG Jin-chen, WU Xue-hong and et al. Numerical study for three kinds of transcritical CO2 refrigeration cycle[J]. Journal of Light Industry, 2015, 30(3-4): 98-102. doi: 10.3969/j.issn.2095-476X.2015.3/4.022 shu

Numerical study for three kinds of transcritical CO₂ refrigeration cycle

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

Received Date: 2014-06-21
Available Online: 2015-09-15

Abstract

The performance difference of trans-critical CO₂ throttle valve cycle, trans-critical CO₂ internal heat exchanger cycle and trans-critical CO₂ expander cycle was investigated by theoretical analysis and numerical simulation. The results showed that:under the same conditions, the cooling capacity of internal heat exchanger cycle was the biggest and throttle valve cycle was the smallest; the power dissipation of internal heat exchanger cycle was the biggest and the expander cycle was smallest; the COP of expander cycle was the biggest and throttle valve cycle was the smallest; the compressor discharge temperature of internal heat exchanger cycle was higher than throttle valve cycle and expander cycle.To sum up,the COP of throttle valve cycle was the smallest. Internal heat exchanger cycle could improve the system cooling capacity, but it also increased the compressor discharge temperature. Expander cycle could reduce system power dissipation effectively, and could more significantly improve system COP, it had the better performance.
- transcritical CO₂ refrigeration cycle,
- COP,
- expander cycle,
- internal heat exchanger cycle,
- throttle cycle
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