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Thermal resistance analysis of cryogenic frosting and its effect on performance of LNG ambient air vaporizer

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  • Liu, Shanshan
  • Jiao, Wenling
  • Ren, Lemei
  • Tian, Xinghao

Abstract

Liquefied natural gas (LNG) ambient air vaporizer (AAV) utilizes renewable energy from ambient air (aerothermal energy) to evaporate LNG in gas terminal stations. Frost may occur on the AAV surface due to cryogenic LNG, leading to poor heat transfer performance. This paper presents a numerical analysis of the thermal resistance of cryogenic frost layer and its effect on the heat transfer coefficient of the air side of AAV. The air temperature near the cryogenic fin tube surface differs from the ambient air and was modified by a three-dimensional integrated model of AAV. An experimental test of the thickness of the frost layer on the AAV fin tube was conducted to validate the numerical model of the frost formation, and the test data agrees well with the numerical results. The results show that a “valley heat transfer coefficient temperature” exists under frost conditions, which is the corresponding air temperature of the minimum heat transfer coefficient of AAV.

Suggested Citation

  • Liu, Shanshan & Jiao, Wenling & Ren, Lemei & Tian, Xinghao, 2020. "Thermal resistance analysis of cryogenic frosting and its effect on performance of LNG ambient air vaporizer," Renewable Energy, Elsevier, vol. 149(C), pages 917-927.
    • Handle: RePEc:eee:renene:v:149:y:2020:i:c:p:917-927
    DOI: 10.1016/j.renene.2019.10.072
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    References listed on IDEAS

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    1. Liu, Shanshan & Jiao, Wenling & Wang, Haichao, 2016. "Three-dimensional numerical analysis of the coupled heat transfer performance of LNG ambient air vaporizer," Renewable Energy, Elsevier, vol. 87(P3), pages 1105-1112.
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    Cited by:

    1. Dai, Rui & Tian, Ran & Zheng, Siyu & Wei, Mingshan & Shi, GuoHua, 2022. "Dynamic performance evaluation of LNG vaporization system integrated with solar-assisted heat pump," Renewable Energy, Elsevier, vol. 188(C), pages 561-572.
    2. Ouyang, Tiancheng & Tan, Jiaqi & Wu, Wencong & Xie, Shutao & Li, Difan, 2022. "Energy, exergy and economic benefits deriving from LNG-fired power plant: Cold energy power generation combined with carbon dioxide capture," Renewable Energy, Elsevier, vol. 195(C), pages 214-229.

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