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Experimental investigation of gas cooler/condenser designs and effects on a CO2 booster system

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  • Tsamos, K.M.
  • Ge, Y.T.
  • Santosa, I.D.M.C.
  • Tassou, S.A.

Abstract

Natural refrigerants are recognised as the most promising working fluids to replace conventional HFCs in food refrigeration systems. Due to its negligible GWP, zero ODP and attractive thermo-physical properties, the CO2 working fluid has grown in popularity over the last decade, especially in supermarket refrigeration systems. These systems can be classified into three main categories: indirect, cascade and all CO2 transcritical booster structures. However, the appropriate control and design optimisation of such systems require further investigation. This paper presents an experimental investigation into the performance of CO2 finned-tube gas coolers/condensers with different designs in a CO2 booster system. The heat exchangers were mounted in a specially designed test facility that allowed the control of different test conditions and parameters, including air on temperatures and flow rates, approach temperatures and CO2 operation pressures. The integrated refrigeration system can provide specified CO2 fluid parameters at the heat exchanger inlet, through which the system efficiency can be calculated. Subsequently, extensive measurements were recorded from this test rig, with insightful indications into system performance and the most influential parameters for system optimisation. These include heat exchanger designs, air on temperatures and flow rates, supercritical and subcritical pressure controls and cooling capacity controls, which are described in the paper.

Suggested Citation

  • Tsamos, K.M. & Ge, Y.T. & Santosa, I.D.M.C. & Tassou, S.A., 2017. "Experimental investigation of gas cooler/condenser designs and effects on a CO2 booster system," Applied Energy, Elsevier, vol. 186(P3), pages 470-479.
  • Handle: RePEc:eee:appene:v:186:y:2017:i:p3:p:470-479
    DOI: 10.1016/j.apenergy.2016.03.004
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    References listed on IDEAS

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    1. Ge, Y.T. & Tassou, S.A. & Santosa, I. Dewa & Tsamos, K., 2015. "Design optimisation of CO2 gas cooler/condenser in a refrigeration system," Applied Energy, Elsevier, vol. 160(C), pages 973-981.
    2. Hu, Bin & Li, Yaoyu & Cao, Feng & Xing, Ziwen, 2015. "Extremum seeking control of COP optimization for air-source transcritical CO2 heat pump water heater system," Applied Energy, Elsevier, vol. 147(C), pages 361-372.
    3. Tao, Y.B. & He, Y.L. & Tao, W.Q., 2010. "Exergetic analysis of transcritical CO2 residential air-conditioning system based on experimental data," Applied Energy, Elsevier, vol. 87(10), pages 3065-3072, October.
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    Cited by:

    1. Dai, Baomin & Wu, Tianhao & Liu, Shengchun & Zhang, Peng & Zhang, Jianing & Fu, Rao & Wang, Dabiao, 2024. "Assessment of booster refrigeration system with eco-friendly working fluid CO2/halogenated alkene (HA) mixture for supermarket application around the world: Energy conservation, cost saving, and emiss," Energy, Elsevier, vol. 297(C).
    2. Rajib Uddin Rony & Huojun Yang & Sumathy Krishnan & Jongchul Song, 2019. "Recent Advances in Transcritical CO 2 (R744) Heat Pump System: A Review," Energies, MDPI, vol. 12(3), pages 1-35, January.
    3. Lei Chai & Konstantinos M. Tsamos & Savvas A. Tassou, 2020. "Modelling and Evaluation of the Thermohydraulic Performance of Finned-Tube Supercritical Carbon Dioxide Gas Coolers," Energies, MDPI, vol. 13(5), pages 1-19, February.
    4. Jesús Catalán-Gil & Daniel Sánchez & Rodrigo Llopis & Laura Nebot-Andrés & Ramón Cabello, 2018. "Energy Evaluation of Multiple Stage Commercial Refrigeration Architectures Adapted to F-Gas Regulation," Energies, MDPI, vol. 11(7), pages 1-31, July.

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