• Title/Summary/Keyword: LNG저장 탱크

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A Study on the Leak-Proof of Full Containment Type Prestressed Concrete Structure (완전 밀폐형 PC 구조물의 누설 안전성에 관한 연구)

  • Kim Chung Kyun;Cho Seung Hyun
    • Journal of the Korean Institute of Gas
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    • v.5 no.4 s.16
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    • pp.85-91
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    • 2001

  • This paper presents safety analysis of LNG leakage in a prestressed concrete outer tank, which is strongly related on the leak checking effects of the PC structure with and without a residual compression zone based on the BS 7777 codes. The full containment type outer tank which is constructed by a prestressed concrete may be destroyed by leaked cryogenic fluids. The FE calculated results show that the total leak checking time of the PC structure with $10\%$ residual compression zone is about 9 days for $-162^{\circ}C$ liquids. But, three primary pumps in an inner tank may operate to send cryogenic fluids for 6 days, which are stored in an inner tank of $140,000m^3$ capacity This means that the prestressed concrete outer tank may be safe for $-162^{\circ}C$ cryogenic fluids leaked from the demolished inner tank.

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A Study on the Characteristics of the Work Safety Environment Sensing Module for LNG Storage Tanks (LNG 저장탱크용 작업안전 환경 센싱 모듈의 특성연구)

  • Park, Byong Jin;Kim, Min Sung
    • Journal of Korea Multimedia Society
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    • v.25 no.2
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    • pp.189-196
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    • 2022

  • We have developed an embedded based environment sensing module with high-resolution temperature, humidity and gas sensors to detect gas leakage under the condition of LNG injection. The developed sensing module have linearity with gas concentration. We have confirmed the developed sensing module could detect LNG gas concentration of 5 cmol/mol and 15 cmol/mol, which are gas concentration at risk of explosion. The response time of the developed module was fast within 8 seconds. Therefore it can be used to detect LNG gas leakage.

  • https://doi.org/10.9717/kmms.2022.25.2.189 인용 PDF KSCI HTML

Process Design and Analysis of BOG Re-liquefaction System with Pre-liquefaction of NGL (NGL 분리식 BOG 재액화 공정 고안 및 해석)

  • Yun, Sang-Kook
    • Journal of the Korean Institute of Gas
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    • v.19 no.3
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    • pp.32-37
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    • 2015

  • The boil-off-gases(BOG) in cryogenic LNG storage tanks are generating continuously due to the heat leakage and need to be re-liquefied by the effective way. As the present method to reliquefy BOG is using LNG cold energy to be supplied after low pressure primary pump, the demand of LNG flow rate should be over 10 times of BOG produced rate to reliquefy it. This research invented new effective re-liquefaction system having only 3~4 times of LNG flow rate against unit BOG, that the pre-liquefaction process of NGL and the use of high pressure LNG cold energy after secondary pump. By the analysis, it could be high efficient reliquefying system for all amount of BOG treatment even during the summer time, and improvement of operation safety and efficiency of LNG terminal.

  • https://doi.org/10.7842/kigas.2015.19.3.32 인용 PDF KSCI

PU/Layer Silicate 복합체의 난연성

  • 곽봉신;김정훈;강영구
    • Proceedings of the Korean Institute of Industrial Safety Conference
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    • 2002.11a
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    • pp.311-315
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    • 2002

  • Polyurethane 발포체는 우수한 단열 및 흡음특성 그리고 반응물질인 polyol과 isocyanate의 성분 및 배합비에 따라 여러가지 제품군으로 특성 설계가 가능하여 LNG 저장탱크, LNG 유조선의 cryogenic insulator, 육상 및 해상용 냉동 및 냉장시설물, 가전제품, 건축단열판넬 등에 널리 사용되고 있다. 그러나 난연성의 결여로 화재 발생시 급격한 연소반응과 유해가스 발생을 동반하여 화재안전 및 건강보건상 중대한 단점을 가지고 있다. 본 연구진은 PU발포체의 물성개선을 통한 난연특성 연구의 일환으로서 montmorillonite, hectorite, vermiculite의 layer silicate를 urethane 원료물질과 혼성발포 공정을 통해 난연복합체를 제조하여 UL94V, LOI, Morphology 등의 시험을 수행하였다.(중략)

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