Development of partial liquefaction system for liquefied natural gas carrier application using exergy analysis
The cargo handling system, which is composed of a fuel gas supply unit and cargo tank pressure control unit, is the second largest power consumer in a Liquefied Natural Gas (LNG) carrier. Because of recent enhancements in ship efficiency, the surplus boil-off gas that remains after supplying fuel ga...
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2018-09-01
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| Series: | International Journal of Naval Architecture and Ocean Engineering |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2092678217302212 |
| _version_ | 1818487840262062080 |
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| author | Jungho Choi |
| author_facet | Jungho Choi |
| author_sort | Jungho Choi |
| collection | DOAJ |
| description | The cargo handling system, which is composed of a fuel gas supply unit and cargo tank pressure control unit, is the second largest power consumer in a Liquefied Natural Gas (LNG) carrier. Because of recent enhancements in ship efficiency, the surplus boil-off gas that remains after supplying fuel gas for ship propulsion must be reliquefied or burned to regulate the cargo tank pressure. A full or partial liquefaction process can be applied to return the surplus gas to the cargo tank. The purpose of this study is to review the current partial liquefaction process for LNG carriers and develop new processes for reducing power consumption using exergy analysis. The developed partial liquefaction process was also compared with the full liquefaction process applicable to a LNG carrier with a varying boil-off gas composition and varying liquefaction amounts. An exergy analysis showed that the Joule–Thomson valve is the key component needed for improvements to the system, and that the proposed system showed an 8% enhancement relative to the current prevailing system. A comparison of the study results with a partial/full liquefaction process showed that power consumption is strongly affected by the returned liquefied amount. Keywords: Reliquefaction, PRS, Boil-off gas, Open cycle, Exergy analysis, Specific power consumption |
| first_indexed | 2024-12-10T16:43:13Z |
| format | Article |
| id | doaj.art-7c18e486c45441859b5a734694227dcf |
| institution | Directory Open Access Journal |
| issn | 2092-6782 |
| language | English |
| last_indexed | 2024-12-10T16:43:13Z |
| publishDate | 2018-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Naval Architecture and Ocean Engineering |
| spelling | doaj.art-7c18e486c45441859b5a734694227dcf2022-12-22T01:41:09ZengElsevierInternational Journal of Naval Architecture and Ocean Engineering2092-67822018-09-01105609616Development of partial liquefaction system for liquefied natural gas carrier application using exergy analysisJungho Choi0Corresponding author.; Department of Naval Architecture and Offshore Engineering, Dong-A University, Busan, South KoreaThe cargo handling system, which is composed of a fuel gas supply unit and cargo tank pressure control unit, is the second largest power consumer in a Liquefied Natural Gas (LNG) carrier. Because of recent enhancements in ship efficiency, the surplus boil-off gas that remains after supplying fuel gas for ship propulsion must be reliquefied or burned to regulate the cargo tank pressure. A full or partial liquefaction process can be applied to return the surplus gas to the cargo tank. The purpose of this study is to review the current partial liquefaction process for LNG carriers and develop new processes for reducing power consumption using exergy analysis. The developed partial liquefaction process was also compared with the full liquefaction process applicable to a LNG carrier with a varying boil-off gas composition and varying liquefaction amounts. An exergy analysis showed that the Joule–Thomson valve is the key component needed for improvements to the system, and that the proposed system showed an 8% enhancement relative to the current prevailing system. A comparison of the study results with a partial/full liquefaction process showed that power consumption is strongly affected by the returned liquefied amount. Keywords: Reliquefaction, PRS, Boil-off gas, Open cycle, Exergy analysis, Specific power consumptionhttp://www.sciencedirect.com/science/article/pii/S2092678217302212 |
| spellingShingle | Jungho Choi Development of partial liquefaction system for liquefied natural gas carrier application using exergy analysis International Journal of Naval Architecture and Ocean Engineering |
| title | Development of partial liquefaction system for liquefied natural gas carrier application using exergy analysis |
| title_full | Development of partial liquefaction system for liquefied natural gas carrier application using exergy analysis |
| title_fullStr | Development of partial liquefaction system for liquefied natural gas carrier application using exergy analysis |
| title_full_unstemmed | Development of partial liquefaction system for liquefied natural gas carrier application using exergy analysis |
| title_short | Development of partial liquefaction system for liquefied natural gas carrier application using exergy analysis |
| title_sort | development of partial liquefaction system for liquefied natural gas carrier application using exergy analysis |
| url | http://www.sciencedirect.com/science/article/pii/S2092678217302212 |
| work_keys_str_mv | AT junghochoi developmentofpartialliquefactionsystemforliquefiednaturalgascarrierapplicationusingexergyanalysis |