Theoretical and Computational Analyses of LNG Evaporator

分类： 动力与电气工程 >> 工程热物理学 提交时间： 2017-03-31 合作期刊: 《热科学学报》

Palani Kumar Chidambaram Yang Myung Jo Heuy Dong Kim

摘要： Theoretical and numerical analysis on the fluid flow and heat transfer inside a LNG evaporator is conducted in this work. Methane is used instead of LNG as the operating fluid. This is because; methane constitutes over 80% of natural gas. The analytical calculations are performed using simple mass and energy balance equations. The analytical calculations are made to assess the pressure and temperature variations in the steam tube. Multiphase numerical simulations are performed by solving the governing equations (basic flow equations of continuity, momentum and energy equations) in a portion of the evaporator domain consisting of a single steam pipe. The flow equations are solved along with equations of species transport. Multiphase modeling is incorporated using VOF method. Liquid methane is the primary phase. It vaporizes into the secondary phase gaseous methane. Steam is another secondary phase which flows through the heating coils. Turbulence is modeled by a two equation tur- bulence model. Both the theoretical and numerical predictions are seen to match well with each other. Further pa- rametric studies are planned based on the current research.

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