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Modélisation et analyse de la résistance thermique de la gazéification du GNL dans des vaporisateurs d’air ambiant.

Modeling and thermal resistance analysis of LNG gasification in ambient air vaporizers.

Numéro : pap. 0030

Auteurs : REN L., JIAO W., TIAN X.

Résumé

Liquefied natural gas (LNG) ambient air vaporizer (AAV) has attracted more attention because of its economy, popularity, and environmental protection; however, the low efficiency of AAV is the bottle-neck of its wide application. In order to find the effective methods of solving this problem, we proposed a mathematical model to evaluate the thermal resistances of LNG AAV. Besides, a thorough comparison of different correlations for natural convection and flow boiling is conducted. The results indicate that: (1) Obvious deviations are found between various heat transfer correlations. (2) The total thermal resistance of AAV increases with operation time. (3) The airside thermal resistance accounts for more than 90% of the total thermal resistance, and the percentage of frost thermal resistance is higher than 50% after 8 hours. (4) When air temperature is higher or lower than a transition temperature, the heat transfer performance of AAV enhances.

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Pages : 11

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Détails

  • Titre original : Modeling and thermal resistance analysis of LNG gasification in ambient air vaporizers.
  • Identifiant de la fiche : 30025780
  • Langues : Anglais
  • Source : Cryogenics 2019. Proceedings of the 15th IIR International Conference: Prague, Czech Republic, April 8-11, 2019.
  • Date d'édition : 08/05/2019
  • DOI : http://dx.doi.org/10.18462/iir.cryo.2019.0030

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