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Design and simulations of refrigerated sea water chillers with CO2 ejector pumps for marine applications in hot climates

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  • Bodys, Jakub
  • Hafner, Armin
  • Banasiak, Krzysztof
  • Smolka, Jacek
  • Ladam, Yves

Abstract

Various system configurations have been developed to improve the R744 systems under hot ambient conditions. However, stationary land applications are characterised by negligible limits on space for system equipment, unlike the marine industry, i.e. on-board fishing vessels. The baseline CO2 refrigeration system for fishing vessels was developed by a cooperating industrial company, namely the Refrigerated Sea Water Chillers operation on the Norwegian coast, which confirmed the successful application of this approach. In this study, modified layouts are evaluated for operation in warmer climates without the need for an additional compressor unit, thus maintaining the compactness of the unit. Flash gas valve-, parallel compression- and multi-ejector systems were numerically investigated including ejectors section and flooded evaporator. Sea water temperatures as occurring in Mediterranean and East-Asian waters were investigated. Both the optimal high-pressure as well as the pressure level in an intermediate pressure receiver were controlled to achieve low energy consumptions. Finally, an up to 70% performance improvement was obtained in the case of the most advanced installation working in warm East-Asian waters. The obtained results showed that the proper design of the system should ensure no necessity for an additional compressor in warmer climates while still maintaining the designed cooling capacity.

Suggested Citation

  • Bodys, Jakub & Hafner, Armin & Banasiak, Krzysztof & Smolka, Jacek & Ladam, Yves, 2018. "Design and simulations of refrigerated sea water chillers with CO2 ejector pumps for marine applications in hot climates," Energy, Elsevier, vol. 161(C), pages 90-103.
    • Handle: RePEc:eee:energy:v:161:y:2018:i:c:p:90-103
    DOI: 10.1016/j.energy.2018.07.126
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    References listed on IDEAS

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    1. Villarino, José Ignacio & Villarino, Alberto & Fernández, Francisco Ángel, 2017. "Experimental and modelling analysis of an office building HVAC system based in a ground-coupled heat pump and radiant floor," Applied Energy, Elsevier, vol. 190(C), pages 1020-1028.
    2. Ruan, Yingjun & Liu, Qingrong & Li, Zhengwei & Wu, Jiazheng, 2016. "Optimization and analysis of Building Combined Cooling, Heating and Power (BCHP) plants with chilled ice thermal storage system," Applied Energy, Elsevier, vol. 179(C), pages 738-754.
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    Cited by:

    1. Yu, Binbin & Yang, Jingye & Wang, Dandong & Shi, Junye & Chen, Jiangping, 2019. "An updated review of recent advances on modified technologies in transcritical CO2 refrigeration cycle," Energy, Elsevier, vol. 189(C).
    2. Li, Hao & Gong, Xiufeng & Xu, Wenjie & Li, Minxia & Dang, Chaobin, 2020. "Effects of climate on the solar-powered R1234ze/CO2 cascade cycle for space cooling," Renewable Energy, Elsevier, vol. 153(C), pages 870-883.
    3. Besagni, Giorgio, 2019. "Ejectors on the cutting edge: The past, the present and the perspective," Energy, Elsevier, vol. 170(C), pages 998-1003.

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