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Thermodynamic analysis and optimization of novel ejector-expansion TRCC (transcritical CO2) cascade refrigeration cycles (Novel transcritical CO2 cycle)

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  • Yari, Mortaza
  • Mahmoudi, S.M.S.

Abstract

In this paper, two new CO2 cascade refrigeration cycles are proposed and analyzed. In both these cycles the top cycle is an ejector-expansion transcritical cycle and the bottom cycle is a sub-critical CO2 cycle. In one of these proposed cycles the waste heat from the gas cooler is utilized to drive a supercritical CO2 power cycle making the plant a combination of three cycles. Using the first and second laws of thermodynamics, theoretical analyses on the performance characteristics of the cycles are carried out. Also a parametric study is conducted to optimize the performance of each cycle under various operating conditions. The proposed cycles exhibit a reasonable value of COP (coefficient of performance) with a much less value of compressor discharge temperature, compared to the conventional cycles.

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  • Yari, Mortaza & Mahmoudi, S.M.S., 2011. "Thermodynamic analysis and optimization of novel ejector-expansion TRCC (transcritical CO2) cascade refrigeration cycles (Novel transcritical CO2 cycle)," Energy, Elsevier, vol. 36(12), pages 6839-6850.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:12:p:6839-6850
    DOI: 10.1016/j.energy.2011.10.012
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    Cited by:

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    2. Budzianowski, Wojciech M., 2012. "Value-added carbon management technologies for low CO2 intensive carbon-based energy vectors," Energy, Elsevier, vol. 41(1), pages 280-297.
    3. Megdouli, K. & Ejemni, N. & Nahdi, E. & Mhimid, A. & Kairouani, L., 2017. "Thermodynamic analysis of a novel ejector expansion transcritical CO2/N2O cascade refrigeration (NEETCR) system for cooling applications at low temperatures," Energy, Elsevier, vol. 128(C), pages 586-600.
    4. Damoon Aghazadeh Dokandari & S. M. S. Mahmoudi & M. Bidi & Ramin Haghighi Khoshkhoo & Marc A. Rosen, 2018. "First and Second Law Analyses of Trans-critical N 2 O Refrigeration Cycle Using an Ejector," Sustainability, MDPI, vol. 10(4), pages 1-14, April.
    5. Sun, Zhili & Wang, Qifan & Xie, Zhiyuan & Liu, Shengchun & Su, Dandan & Cui, Qi, 2019. "Energy and exergy analysis of low GWP refrigerants in cascade refrigeration system," Energy, Elsevier, vol. 170(C), pages 1170-1180.
    6. Lin, Chen & Cai, Wenjian & Li, Yanzhong & Yan, Jia & Hu, Yu, 2012. "The characteristics of pressure recovery in an adjustable ejector multi-evaporator refrigeration system," Energy, Elsevier, vol. 46(1), pages 148-155.
    7. Yari, Mortaza & Mehr, A.S. & Mahmoudi, S.M.S., 2013. "Thermodynamic analysis and optimization of a novel dual-evaporator system powered by electrical and solar energy sources," Energy, Elsevier, vol. 61(C), pages 646-656.
    8. Lin, Chen & Cai, Wenjian & Li, Yanzhong & Yan, Jia & Hu, Yu, 2012. "Pressure recovery ratio in a variable cooling loads ejector-based multi-evaporator refrigeration system," Energy, Elsevier, vol. 44(1), pages 649-656.
    9. Sharifi, Navid & Sharifi, Majid, 2014. "Reducing energy consumption of a steam ejector through experimental optimization of the nozzle geometry," Energy, Elsevier, vol. 66(C), pages 860-867.
    10. Chen, Qi & Yu, Mengqi & Yan, Gang & Yu, Jianlin, 2022. "Thermodynamic analyses of a modified ejector enhanced dual temperature refrigeration cycle for domestic refrigerator/freezer application," Energy, Elsevier, vol. 244(PA).
    11. Choi, Hwi-Ung & Choi, Kwang-Hwan, 2023. "Numerical study on the performance of a solar-assisted heat pump coupled with a photovoltaic-thermal air heater," Energy, Elsevier, vol. 285(C).
    12. Padilla, Ricardo Vasquez & Too, Yen Chean Soo & Benito, Regano & McNaughton, Robbie & Stein, Wes, 2016. "Thermodynamic feasibility of alternative supercritical CO2 Brayton cycles integrated with an ejector," Applied Energy, Elsevier, vol. 169(C), pages 49-62.
    13. Yingjie Zhou & Junrong Tang & Cheng Zhang & Qibin Li, 2019. "Thermodynamic Analysis of the Air-Cooled Transcritical Rankine Cycle Using CO 2 /R161 Mixture Based on Natural Draft Dry Cooling Towers," Energies, MDPI, vol. 12(17), pages 1-17, August.
    14. Bodys, Jakub & Smolka, Jacek & Palacz, Michal & Haida, Michal & Banasiak, Krzysztof & Nowak, Andrzej J. & Hafner, Armin, 2016. "Performance of fixed geometry ejectors with a swirl motion installed in a multi-ejector module of a CO2 refrigeration system," Energy, Elsevier, vol. 117(P2), pages 620-631.
    15. Sarkar, Jahar, 2012. "Ejector enhanced vapor compression refrigeration and heat pump systems—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(9), pages 6647-6659.
    16. Yari, M. & Mehr, A.S. & Mahmoudi, S.M.S., 2013. "Simulation study of the combination of absorption refrigeration and ejector-expansion systems," Renewable Energy, Elsevier, vol. 60(C), pages 370-381.
    17. Mingzhang Pan & Huan Zhao & Dongwu Liang & Yan Zhu & Youcai Liang & Guangrui Bao, 2020. "A Review of the Cascade Refrigeration System," Energies, MDPI, vol. 13(9), pages 1-26, May.
    18. Wang, Xiao & Yu, Jianlin & Zhou, Mengliu & Lv, Xiaolong, 2014. "Comparative studies of ejector-expansion vapor compression refrigeration cycles for applications in domestic refrigerator-freezers," Energy, Elsevier, vol. 70(C), pages 635-642.
    19. Konrad, Mary Elizabeth & MacDonald, Brendan D., 2023. "Cold climate air source heat pumps: Industry progress and thermodynamic analysis of market-available residential units," Renewable and Sustainable Energy Reviews, Elsevier, vol. 188(C).

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    Keywords

    Ejector; Transcritical cycle; Exergy; COP; Efficiency; CO2;
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