A study of LNG processes to determine the effect of end flash systems on efficiency

Akinsipe, Gbemisola Deborah and Anozie, Ambrose Nwora and Babatunde, Damilola Elizabeth (2020) A study of LNG processes to determine the effect of end flash systems on efficiency. archives of thermodynamics, 4 (2). pp. 35-63.

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Abstract

This paper describes the simulation, exergy analysis and com- parison of two commonly applied liquefaction of technologies natural gas, namely: propane precooled mixed refrigerant process (C3MR) and dual mixed refrigerant process (DMR) alongside two modifications of each em- ploying end flash systems. The C3MR and DMR process schemes were simulated using the commercial software to mathematically model chemi- cal processes. These schemes were then analysed using energy and exergy calculations to determine their performances. The exergy efficiency for the C3MR processes without end flash system, with simple end flash system and extended end flash system were evaluated as 29%, 31%, and 33%, respec- tively, while the exergy efficiency for the DMR processes without end flash system, with simple end flash system, and extended end flash system were evaluated as 26%, 25.5%, and 30%, respectively. The results achieved show that the extended end flash system versions of the schemes are most effi- cient. Furthermore, the exergy analysis depicted that the major equipment that must be enhanced in order to improve the cycle exergy efficiencies are the compressors, heat exchangers, and coolers.

Item Type:	Article
Uncontrolled Keywords:	C3MR; DMR; Efficiency; Exergy destruction; End flash; LNG
Subjects:	T Technology > TN Mining engineering. Metallurgy T Technology > TP Chemical technology
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Mrs Patricia Nwokealisi
Date Deposited:	03 Mar 2021 09:15
Last Modified:	03 Mar 2021 09:15
URI:	http://eprints.covenantuniversity.edu.ng/id/eprint/13862

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