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Thermal design of a vaporizer for cold recovery from LNG-regasification using CO2 as heat transfer media.

Number: pap. n. 1018

Author(s) : ATIENZA-MARQUEZ A., BRUNO J. C., AKISAWA A., et al.

Summary

Liquefied Natural Gas (LNG) is a valuable exergy source because of its cryogenic temperature (-162oC). However, LNG is usually regasified in Open Rack Vaporizers using seawater as heat source and without cold recovery. Alternatively, double-bundle vaporizers are a promising technology for cold recovery from LNG-regasification. These vaporizers are like shell-and-tube heat exchangers with a thermal buffer fluid which vaporizes taking heat from a heat transfer media and condenses using LNG as heat sink. If the heat transfer media is properly selected, LNG will be regasified with cold recovery. This paper deals with the thermal design of a double-bundle vaporizer using CO2 as heat transfer media for LNG cold recovery and its subsequent use in refrigeration applications. Since the thermal buffer fluid has a critical influence on the design, different candidates are considered. Among them, ethylene reports the lowest heat transfer area required for any tube lengths and diameters.

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Details

  • Original title: Thermal design of a vaporizer for cold recovery from LNG-regasification using CO2 as heat transfer media.
  • Record ID : 30026688
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.1018
  • Notes:

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