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Design and experimental analysis of a carbon dioxide transcritical chiller for commercial refrigeration

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  • Cecchinato, Luca
  • Chiarello, Manuel
  • Corradi, Marco

Abstract

Carbon dioxide is an interesting solution for commercial refrigeration and in perspective for air-conditioning systems. In this paper a newly developed carbon dioxide transcritical air cooled chiller for refrigerating propylene glycol down to -8 °C supply temperature is described. The aim of the project was at optimising the cycle energy efficiency while assuring reliable operation and simple management of the unit. The carbon dioxide optimal pressure issue is addressed with an innovate system architecture and control logic. Using a flash tanks and two electronic valves, the optimal cycle upper pressure was maintained in transcritical operation mode. The managing of the valves allows the refrigeration machine efficiency improvement when the gas cooler inlet air allows subcritical working conditions. A simulation model of the chiller was developed and its results validated with experimental data. A measurement campaign was carried out, testing the chiller at external temperatures ranging from 18 to 35 °C, the unit energy efficiency ranging from 3.1 to 2.0.

Suggested Citation

  • Cecchinato, Luca & Chiarello, Manuel & Corradi, Marco, 2010. "Design and experimental analysis of a carbon dioxide transcritical chiller for commercial refrigeration," Applied Energy, Elsevier, vol. 87(6), pages 2095-2101, June.
    • Handle: RePEc:eee:appene:v:87:y:2010:i:6:p:2095-2101
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    References listed on IDEAS

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    1. Yokozeki, A., 2007. "Solubility correlation and phase behaviors of carbon dioxide and lubricant oil mixtures," Applied Energy, Elsevier, vol. 84(2), pages 159-175, February.
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    Cited by:

    1. Paride Gullo & Armin Hafner & Krzysztof Banasiak & Silvia Minetto & Ekaterini E. Kriezi, 2019. "Multi-Ejector Concept: A Comprehensive Review on its Latest Technological Developments," Energies, MDPI, vol. 12(3), pages 1-29, January.
    2. Qureshi, Bilal Ahmed & Zubair, Syed M., 2012. "The impact of fouling on performance of a vapor compression refrigeration system with integrated mechanical sub-cooling system," Applied Energy, Elsevier, vol. 92(C), pages 750-762.
    3. Ge, Y.T. & Tassou, S.A. & Suamir, I.N., 2013. "Prediction and analysis of the seasonal performance of tri-generation and CO2 refrigeration systems in supermarkets," Applied Energy, Elsevier, vol. 112(C), pages 898-906.
    4. Aprea, Ciro & Maiorino, Angelo & Mastrullo, Rita, 2011. "Change in energy performance as a result of a R422D retrofit: An experimental analysis for a vapor compression refrigeration plant for a walk-in cooler," Applied Energy, Elsevier, vol. 88(12), pages 4742-4748.
    5. Qureshi, Bilal A. & Inam, Muhammad & Antar, Mohamed A. & Zubair, Syed M., 2013. "Experimental energetic analysis of a vapor compression refrigeration system with dedicated mechanical sub-cooling," Applied Energy, Elsevier, vol. 102(C), pages 1035-1041.

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