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Analysis of the freezing mechanism in LNG regasification heat exchangers used in mobile applications.

Number: 0053

Author(s) : CHOROWSKI M., STANCLIK M., KIELAR J., BRENK A., ROGALA Z., MALECHA Z.

Summary

The paper presents the results of the analysis of the freezing mechanism in a shell-and-tube heat exchanger heated with a water-glycol mixture used for LNG regasification. While designing the exchanger in the overheater area is not difficult, the theoretical models available in this topic correspond very well with the experiment, the correct design of the vaporizer zone is quite a challenge. The most important element is the correct modeling of the LNG boiling mechanism. For this purpose, on the basis of available literature data, a methane boiling curve was developed, which was then used to analyze the mechanism of ice accretion on the exchanger tubes for various construction and operational parameters. The analysis was performed both analytically and numerically in the OpenFoam software. The influence of exchanger geometry, heating medium temperature, LNG and WG flow streams as well as glycol concentration in the mixture were analyzed. The developed models were then experimentally validated. On this basis, the heat exchanger, which is partially resistant to the risk of freezing in the event of temporary failure of the heating medium circulation, has been designed.

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Pages: 12

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Details

  • Original title: Analysis of the freezing mechanism in LNG regasification heat exchangers used in mobile applications.
  • Record ID : 30029034
  • Languages: English
  • Source: Cryogenics 2021 online. Proceedings of the 16th IIR International Conference, October 5-7, 2021.
  • Publication date: 2021/10/05
  • DOI: http://dx.doi.org/10.18462/iir.cryo.2021.0053
  • Document available for consultation in the library of the IIR headquarters only.

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