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Determination of Boil-Off gas Ratio for the Design of Underground LNG Storage System in Rock Cavern  

Chung, So-Keul (한국지질자원연구원 지반안전연구부 지하공간연구실)
Lee, Hee-Suk (SK건설주식회사 GSUC팀)
Jeong, Woo-Cheol (SK건설주식회사 GEOTASK팀)
Park, Eui-Seob (한국지질자원연구원 지반안전연구부 지하공간연구실)
Publication Information
Tunnel and Underground Space / v.17, no.1, 2007 , pp. 56-65 More about this Journal
Abstract
A new underground LNG storage concept in the rock mass has been developed by combining underground cavern construction and new ice-ring harrier technologies with the conventional cryogenic insulation system. Technical feasibility of the storage system has been verified through construction and operation of the pilot storage cavern and a full-scale project is expected to start in the near future. One of the most important issues in the LNG storage system is the operational efficiency of the storage to minimize heat loss during a long period of operation due to the cryogenic heat transfer. This paper presents several important results of heat transfer and coupled hydro-thermal analyses by a finite element code Temp/W and Seep/W. A series of heat transfer analyses for full-scale caverns were performed to determine design parameters such as boil-off gas ratio (BOR), insulation thickness and pillar width. The result of the coupled hydro-mechanical analysis showed that BOR for underground storage system remains at about 0.04 %/day during the early stage of the operation. This value could be even much lower when the discontinuities in the rock masses are taken into consideration.
Keywords
Underground LNG storage cavern; Cryogenic; Heat transfer; Boil-Off gas Ratio (BOR); Ice-ring;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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