JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Numerical Model of Heat Diffusion and Evaporation by LNG Leakage at Membrane Insulation
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Numerical Model of Heat Diffusion and Evaporation by LNG Leakage at Membrane Insulation
Lee, Jang Hyun; Kim, YoonJo; Hwang, Se Yun;
  PDF(new window)
 Abstract
The leakage of cryogenic LNG through cracks in the insulation membrane of an LNG carrier causes the hull structure to experience a cold spot as a result of the heat transfer from the LNG. The hull structure will become brittle at this cold spot and the evaporated natural gas may potentially lead to a hazard because of its flammability. This paper presents a computational model for the LNG flow and heat diffusion in an LNG insulation panel subject to leakage. The temperature distribution in the insulation panel and the speed of gas diffusion through it are simulated to assess the safety level of an LNG carrier subject that experiences a leak. The behavior of the leaked LNG is modeled using a multiphase flow that considers the mixture of liquid and gas. The simulation model considers the phase change of the LNG, gas-liquid multiphase interactions in the porous media, and accompanying rates of heat transfer. It is assumed that the NO96-GW membrane storage is composed of glass wool and plywood for the numerical simulation. In the numerical simulation, the seepage, heat diffusion, and evaporation of the LNG are investigated. It is found that the diffusion speed of the leakage is very high to accelerate the evaporation of the LNG.
 Keywords
Two-phase/Multiphase flow;Porous media;LNG leakage;BOR (boil-off-ratio);LNG cargo containment;Evaporation;
 Language
Korean
 Cited by
1.
상용 보호열판법 열전도율 측정장비를 사용한 열유속법의 열전도율 값 보정에 대한 실험적 연구,이진성;김경수;김유일;우석민;윤승진;

한국해양공학회지, 2015. vol.29. 2, pp.169-174 crossref(new window)
1.
Measurement of Real Deformation Behavior in C-type Lng Mock-up Tank using Strain Gage, Journal of Ocean Engineering and Technology, 2016, 30, 2, 117  crossref(new windwow)
2.
Experimental Study on Correction of Thermal Conductivity Obtained by Heat Flow Method using Commercial Guarded Hot Plate Method Apparatus, Journal of Ocean Engineering and Technology, 2015, 29, 2, 169  crossref(new windwow)
 References
1.
Aungier, R.H., 1995. A Fast, Accurate Real Gas Equation of State for Fluid Dynamic Analysis Applications. Journal of Fluids Engineering, 117, 277-281. crossref(new window)

2.
Bae, J., Joh, K., Yoon, H., Lee, H., and Ha, M., 2007. Safety Evaluation of Mark III Type LNG Carriers under Barrier Leakages. Proceedings of 15th International Conference of Liquefied Natural Gas, PS6-2.1.

3.
Caps, R. and Fricke, J., 2000. Thermal Conductivity of Opacified Powder Filler Materials for Vacuum Insulations 1. International Journal of Thermophysics, 21(2), 445-452. crossref(new window)

4.
Choi, I., Yu, Y.H., and Lee, D.G., 2013. Cryogenic Sandwich-Type Insulation Board Composed of E-Glass/Epoxy Composite and Polymeric Foams. Composite Structures, 102, 61-71. crossref(new window)

5.
Choi, S.W., Roh, J.U., Kim, M.S., and Lee, W.I., 2012. Analysis of Two Main LNG CCS (Cargo Containment System) Insulation Boxes for Leakage Safety using Experimentally Defined Thermal Properties. Applied Ocean Research, 37, 72-89. crossref(new window)

6.
Chu, B., Chang, D., and Chung, H., 2012. Optimum Liquefaction Fraction for Boil-off Gas Reliquefaction System of Semi-Pressurized Liquid CO2 Carriers Based on Economic Evaluation. International Journal of Greenhouse Gas Control, 10, 46-55. crossref(new window)

7.
Colson, D., Haquin, N., Malochet, M., 2012. Reduction Of Boil-Off Generation In Cargo Tanks Of Liquid Natural Gas Carriers - Recent Developments Of Gaztransport & Technigaz (GTT) Cargo Containment Systems, World Gas Conference.

8.
Demharter, A., 1998. Polyurethane Rigid Foam, a Proven Thermal Insulating Material for Applications between $+130^{\circ}C$ and $-196^{\circ}C$. Cryogenics, 38(1), 113-117. crossref(new window)

9.
Vanem, E., Antao, P., Ostvikc, I., de Comas, F.D., 2008. Analysing the Risk of LNG Carrier Operations. Reliability Engineering & System Safety, 93(9), 1328-1344. crossref(new window)

10.
GTT, 2014. Retrieved on J. Available at: [Accessed 6 Jan. 2014]

11.
Hasan, M.M.F., Zheng, A.M., Karimi, I.A., 2009. Minimizing Boil-off Losses in Liquefied Natural Gas Transportation. Industrial & Engineering Chemistry Research, 48(21), 9571-9580. crossref(new window)

12.
Hwang, S.Y., Lee, J.H., Kim, S.C., 2012. Simplified Impinging Jet Model for Practical Sloshing Assessment of LNG Cargo Containment. Proceedings of the Twenty-second International Offshore and Polar Engineering Conference, ISOPE, Rhodes, Greece, 495-501.

13.
Qi, R., Ng, D., Cormier, B.R., Mannan, M.S., 2010. Numerical Simulations of LNG Vapor Dispersion in Brayton Fire Training Field Ttests with ANSYS CFX. Journal of Hazardous Materials, 183, 51-61. crossref(new window)

14.
Ito, H., Suh, Y.S., Chun, S.E., Satish Kumar, Y.V., Ha, M.K., Park, J.J., Yu, H.C., Wang, B., 2008. A Direct Assessment Approach for Structural Strength Evaluation of Cargo Containment System under Sloshing Inside LNGC Tans based on Fluid Structure Interaction. Proceeding of 27th Int Conf on Offshore Mech and Arctic Eng, Estoril, Portugal, 5, 835-845.

15.
Kim, B.G., Lee, D.G., 2008. Leakage Characteristics of the Glass Fabric Composite Barriers of LNG Ships, Composite Structures, 86, 27-36.

16.
Lee, H.B., Park, H.J., Rhee, S.H., Bae, J.H., Lee, K.W., Jeong, W.J., 2011a. Liquefied Natural Gas flow in the Insulation Wall of a Cargo Containment System and its Evaporation. Applied Thermal Engineering, 31, 2605-2615. crossref(new window)

17.
Lee, S.J., Yang, Y.S., Kim S.C., Lee, J.H., 2011b. Strength Assessment Procedure of LNG CCS under Sloshing Load Based on the Direct Approach. Proceedings of the International Offshore and Polar Engineering Conference, ISOPE, Hawaii, USA, 183-190.

18.
Li, Y., Jin, G., Zhong, Z., 2012. Thermodynamic Analysis-Based Improvement for the Boil-off Gas Reliquefaction Process of Liquefied Ethylene Vessels. Chemical Engineering & Technology, 35(10), 1759-1764. crossref(new window)

19.
Livingston, M., Gustafson, R., 2009. Minimize Risks from Cryogenic Exposure on LNG Facilities. Hydrocarbon Processing, 88(7), 51-58.

20.
Nho, I.S., Kim, S.C., Jang, B.S., Lee, J.H., 2012. Parametric Investigation on the Simplified Triangular Impulse of Sloshing Pressure and Categorization of the Structural Response on the Mark III LNG CCS, Proceedings of the Twenty-second International Offshore and Polar Engineering Conference, ISOPE, Rhodes, Greece, 495-501.

21.
Presley, M.A., Christensen, P.R., 1997. Thermal Conductivity Measurements of Particulate Materials 1. A Review, Journal of Geophysical Research, 102(E3), 6535-6549. crossref(new window)

22.
Ranz, W.E., Marshall, W.R., 1952. Evaporation from Drops. Chemical Engineering Progress, 48(3), 141-146.

23.
Shin, Y., Lee, Y.P., 2009. Design of a Boil-off Natural Gas Reliquefaction Control System for LNG Carriers, Applied Energy, 86(1), 37-44. crossref(new window)

24.
Zakaria, M.S., Osman, K., Saadun, M.N.A., Manaf, M.Z.A., Hanafi, M.H.M., 2013. Computational Simulation of Boil-off Gas Formation inside Liquefied Natural Gas Tank using Evaporation Model in ANSYS Fluent. Applied Mechanics and Materials, 393, 839-844. crossref(new window)