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Optimization and Economic Analysis for Small-Scale Movable LNG Liquefaction Process with Leakage Considerations

Authors
Lee, Sang HyunLim, Dong-HaPark, Kyungtae
Issue Date
Aug-2020
Publisher
MDPI
Keywords
small-scale movable liquefied natural gas plant; particle swarm optimization; economic analysis; exergy analysis; single mixed refrigerant liquefaction process; nitrogen expansion liquefaction process; propane pre-cooling self-refrigeration process
Citation
APPLIED SCIENCES-BASEL, v.10, no.15, pp.1 - 25
Journal Title
APPLIED SCIENCES-BASEL
Volume
10
Number
15
Start Page
1
End Page
25
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/2549
DOI
10.3390/app10155391
ISSN
2076-3417
Abstract
In this study, exergy and economic analysis were conducted to gain insight on small-scale movable LNG liquefaction considering leakage. Optimization and comparison were performed to demonstrate the quantitative results of single mixed refrigerant, dual nitrogen expansion, and the propane pre-cooling self-refrigeration processes. For the optimization, exergy efficiency was used as the objective function; the results showed that exergy efficiencies are 38.85%, 19.96%, and 13.65%, for single mixed refrigerant, dual nitrogen expansion, and propane pre-cooling self-refrigeration, respectively. Further, the cost analysis showed that the product cost of each process is 4002.3 USD/tpa, 5490.2 USD/tpa, and 9608.5 USD/tpa. A sensitivity analysis was conducted to determine parameters that affect exergy and cost. The SMR process is the most competitive in terms of exergy efficiency, product cost, and operability, without considering makeup facilities.
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공과대학 (화공생명공학부)
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