Influence of Thermodynamic Property Models on LNG Process Simulation

Evaporation, transport and liquefaction are essential processes in the LNG process chain. High expectations concerning the economic efficiency, the product quality and environmental safety result in increasing demands on these processes. This applies both to the design and the operation of a specific system, e.g. to the optimal use of resources while vaporising LNG. Fundamental contributions to optimisation and operation of a system are expected from a detailed simulation of the processes. Therefore an accurate representation of thermophysical properties and energy balances of the simulated process is essential.

As simulations are important for the optimisation and the operation of a process a highly accurate representation of thermodynamic properties is needed. To assure that these demands are met an appropriate property model must be used. The GERG-2004 XT08 [1] is the new reference equation of state for natural gases, which describes the whole fluid phase. In order to model LNG processes with the highest accuracy possible the new equation is implemented into several simulation tools. Researches on the influence of property models on the simulation of LNG transport and vaporisation processes show the expected advantages in accuracy with the GERG-2004 XT08 [1] in comparison with typical engineering equations of state.



Copyright: © DIV Deutscher Industrieverlag GmbH / Vulkan-Verlag GmbH
Quelle: GWF gas solutions International (August 2010)
Seiten: 3
Preis: € 3,00
Autor: Dr.-Ing. Florian Dauber
Prof. Dr.-Ing. Roland Span
Dr. Peter Schley
 
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