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Computational Simulation of Boil-Off Gas Formation inside Liquefied Natural Gas Tank Using Evaporation Model in ANSYS Fluent

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Abstract:

Research on the waste energy and emission has been quite intensive recently. The formation, venting and flared the Boil-off gas (BOG) considered as one of the contribution to the Greenhouse Gas (GHG) emission nowadays. The current model or method appearing in the literature is unable to analyze the real behavior of the vapor inside Liquefied Natural Gas (LNG) tank and unable to accurately estimate the amount of boil-off gas formation. In this paper, evaporation model is used to estimate LNG Boil-Off rate (BOR) inside LNG tank. Using User Define Function (UDF) hooked to the software ANSYS Fluent. The application enable drag law and alternative heat transfer coefficient to be included. Three dimensional membrane type LNG cargos are simulated with selected boundary condition located in the United States Gulf Coast based on average weather conditions. The result shows that the value of BOR agrees well with the previous study done with another model and with International Marine organization (IMO) standard which is less than 0.15% weight per day. The results also enable us to visualize the LNG evaporation behaviors inside LNG tanks.

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Periodical:

Applied Mechanics and Materials (Volume 393)

Pages:

839-844

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.393.839

Citation:

Cite this paper

Online since:

September 2013

Authors:

Mohamad Shukri Zakaria, Kahar Osman, Mohd Noor Asril Saadun, Muhammad Zaidan Abdul Manaf, Mohd Hafidzal Mohd Hanafi

Keywords:

ANSYS Fluent, Boil-Off Gas (BOG), Evaporation Model, Greenhouse Gas (GHG), Liquefied Natural Gas (LNG), User Define Function (UDF)

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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