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Comparative Study on the Thermal Insulation of Membrane LNG CCS by Heat Transfer Analysis

열전달 해석을 이용한 멤브레인형 LNG 화물창의 단열구조 성능비교

Hwang Se-Yun
,
Lee Jang-Hyun†*
Research Institute of Industrial Science and Technology
Department of Naval Architecture and Ocean Engineering

• 본 논문에 대한 토의를 2016년 2월 29일까지 학회로 보내주시면 2016년 4월호에 토론결과를 게재하겠습니다.

*Corresponding Author : jh_lee@inha.ac.kr
2016. pp. 53-60
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Abstract

본 연구는 NO96 화물창의 BOG(boil off gas), BOR(boil off rate)을 감소시키기 위한 노력으로 단열재료 및 단열층을 변화시켜서 개발된 NO96-GW, NO96-L03의 방열구조에 대해서 BOG, BOR 값을 계산하고 단열성능을 비교․평가하였다. 두 가지의 변형된 NO96 모델을 기존의 NO96 방열과 단열층 및 단열재료의 차이점을 비교하고, 각각의 열저항 및 BOG/BOR 값의 비교 결과를 제시하였다. 열저항 값은 유한요소해석법을 이용하여 계산되었으며, 준정적 열평형 상태를 가정하여 열유속과 온도분포를 통하여 단열성능을 비교하였다. 계산에 사용된 화물창의 모든 재료물성치는 온도 의존값으로서 반영하여 -163oC에서의 극저온 상태에서 특성을 반영되었다. 각 화물창의 BOG, BOR 계산은 국부 열전달 해석을 통해 방열판에서 발생하는 열유속을 계산하고, 등가모델을 적용하여 계산하는 과정으로 수행되었으며, 그 결과를 각 화물창의 단열성능을 비교평가하기 위해서 검토하였다.

This study discusses the thermal insulation capacity of variant of NO96 LNG (liquefied natural gas) cargo containment insulation system. Changing the insulation materials and the insulation layers of conventional GTT NO96 containment system, The thermal resistance and BOR(boil off rate) caused by the heat transfer between cryogenic and environmental temperature is discussed. Therefore, thermal analysis of LNG CCS(cargo containment system) is carried out to determine the insulation capabilities. Also, BOR is evaluated in terms of the total amount of heat invaded into CCS(cargo containment system). Variant of NO96 CCS such as NO96, NO96GW and NO96L3 membrane type during laden voyage is selected for the comparative study. Finite element model for heat transfer analysis is conducted by employing the equivalent thermal resistance model to simplify the complex insulation layers. Finally the results for each variant model are relatively compared and discussed to minimize the BOR.

키워드
증발가스, 증발율, 액화천연가스, 화물창, 열전달
boil off gas, boil off rate, liquified natural gas, cargo containment system, heat transfer
References
1
S.W., Choi, J.U., Roh, M.S., Kim and W.I., Lee, 2012. Analysis of Two Main LNG CCS (Cargo Containment System) Insulation Boxes for Leakage Safety using Experimentally Defined Thermal Properties. Appl. Ocean Res., 37, pp.72-89.
10.1016/j.apor.2012.04.002
2
Gaztransport Technigaz 2014NO 96 Evolutionhttp://www.gtt.fr/product/no-96-evolut ion/ (accessed on 1 May 2014).
3
K.C., Han, S.W., Hwang, J.R., Cho, J.S., Kim, J.W., Yoon, O.K., Lim and S.B., Lee, 2011. A Study on the BOIL-off Rate Prediction of LNG Cargo Containment Filled with Insulation Powders. J. Comput. Struct. Eng. Inst. Korea, 24, pp.193-200.
4
J.W., Heo, Y.J., Lee, J.R., Cho, M.K., Ha and J.N., Lee, 2003. Heat Transfer Analysis and BOG Estimation of Membrane-Type LNG Cargo during Laden Voyage. Trans. Korean Soc. Mech. Eng., A, pp.393-400.
10.3795/KSME-A.2003.27.3.393
5
Lee J.H. Kim Y.J. Hwang S. 2014Computational Studies of LNG Evaporation and Heat Diffusion through a LNG Cargo Tank MembraneProceedings of the 15th International Heat Transfer Conference IHTC-15111
10.1615/IHTC15.tpn.009780
6
A., Majouli, Y.S., Alami, S., Tahiri, A., Albizane, H., Loukili and M., Belhaj, 2011. Characterization of Flat Membrane Support Elaborated from Local Moroccan Perlite. Desalination, 277, pp.61-66.
10.1016/j.desal.2011.04.003
7
Öziʂik M.N. 1985Heat TransferMcGraw-Hill.
8
Rho S.E. Son G. 2012Numerical Investigation of Heat Transfer in the LNG Storage Tank with a Sloshing ConditionProc. Korean Soc. Comput. Fluids Eng.1015
9
M.S., Zakaria, K., Osman and M.N., Musa, 2012. Boil-off Gas Formation Inside Large Scale Liquefied Natural Gas(LNG) Tank based on Specific Parameters. Appl. Mech. & Mater., 229∼231,, pp.690-694.
10.4028/www.scientific.net/AMM.229-231.690
Information
  • Publisher :Computational Structural Engineering Institute of Korea
  • Publisher(Ko) :한국전산구조공학회
  • Journal Title :Journal of the Computational Structural Engineering Institute of Korea
  • Journal Title(Ko) :한국전산구조공학회 논문집
  • Volume : 29
  • No :1
  • Pages :53-60
  • Received Date : 2015-10-09
  • Revised Date : 2015-10-22
  • Accepted Date : 2015-11-24
  • DOI :https://doi.org/10.7734/COSEIK.2016.29.1.53
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