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Performance analysis of two-stage compression transcritical CO2 refrigeration system with R290 mechanical subcooling unit

Author

Listed:
  • Liu, Shengchun
  • Lu, Fenping
  • Dai, Baomin
  • Nian, Victor
  • Li, Hailong
  • Qi, Haifeng
  • Li, Jiayu

Abstract

The use of carbon dioxide (CO2) as refrigerant is driven by the need to phase down the traditional synthetic refrigerant so as to mitigate the warming climate. In this study, the thermal performance of a two-stage compression transcritical CO2 refrigeration system with R290 mechanical subcooling unit is conducted. The goal is to obtain the maximum coefficient of performance (COP) of five different mechanical subcooling systems under the optimal subcooling temperature and compressor discharge pressure. The two-throttling and two-stage compression high-pressure mechanical subcooling system is found to have a higher COP. When the evaporation temperature is −30 °C, the COP of the two-throttling and two-stage compression high-pressure mechanical subcooling system is improved by 76.74%. The COP of the two-throttling and two-stage compression high-pressure mechanical subcooling system is 1.52 at an ambient temperature of 40 °C, which is 21.87% higher than that of the two-throttling and two-stage compression low-pressure mechanical subcooling system. The power consumption ratio of one-throttling and two-stage compression low-pressure mechanical subcooling system is significantly higher than that of other systems. From a comprehensive analysis of the proposed four systems, the two-throttling and two-stage compression high-pressure mechanical subcooling system has the best performance over all other systems.

Suggested Citation

  • Liu, Shengchun & Lu, Fenping & Dai, Baomin & Nian, Victor & Li, Hailong & Qi, Haifeng & Li, Jiayu, 2019. "Performance analysis of two-stage compression transcritical CO2 refrigeration system with R290 mechanical subcooling unit," Energy, Elsevier, vol. 189(C).
    • Handle: RePEc:eee:energy:v:189:y:2019:i:c:s0360544219318389
    DOI: 10.1016/j.energy.2019.116143
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    References listed on IDEAS

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    8. Paride Gullo & Armin Hafner & Krzysztof Banasiak, 2019. "Thermodynamic Performance Investigation of Commercial R744 Booster Refrigeration Plants Based on Advanced Exergy Analysis," Energies, MDPI, vol. 12(3), pages 1-24, January.
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    1. Guo, Liheng & Ding, Yudong & Liao, Qiang & Zhu, Xun & Wang, Hong, 2022. "A new heat supply strategy for CO2 capture process based on the heat recovery from turbine exhaust steam in a coal-fired power plant," Energy, Elsevier, vol. 239(PA).
    2. Daniel Sánchez & Jesús Catalán-Gil & Ramón Cabello & Daniel Calleja-Anta & Rodrigo Llopis & Laura Nebot-Andrés, 2020. "Experimental Analysis and Optimization of an R744 Transcritical Cycle Working with a Mechanical Subcooling System," Energies, MDPI, vol. 13(12), pages 1-27, June.
    3. Li, Jiaojiao & Zoghi, Mohammad & Zhao, Linfeng, 2022. "Thermo-economic assessment and optimization of a geothermal-driven tri-generation system for power, cooling, and hydrogen production," Energy, Elsevier, vol. 244(PB).
    4. Benlin Shi & Muqing Chen & Weikai Chi & Qichao Yang & Guangbin Liu & Yuanyang Zhao & Liansheng Li, 2022. "Effects of Internal Heat Exchanger on Two-Stage Compression Trans-Critical CO 2 Refrigeration Cycle Combined with Expander and Intercooling," Energies, MDPI, vol. 16(1), pages 1-16, December.
    5. Yuyao Sun & Jinfeng Wang & Jing Xie, 2021. "Performance Optimizations of the Transcritical CO 2 Two-Stage Compression Refrigeration System and Influences of the Auxiliary Gas Cooler," Energies, MDPI, vol. 14(17), pages 1-17, September.

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