Numerical simulation of coupled heat transfer for LNG pipeline

doi:10.11949/j.issn.0438-1157.20150712

Abstract

Abstract:

Coupled heat transfer was analyzed between liquefied natural gas(LNG)pipeline and environment,which including conduction,convection and radiative heat transfer.Conduction should be focused between pipeline and insulation.Convection and radiative was studied between insulation and environment.Cold exergy loss for LNG pipeline was discussed in addition.Then,numerical stimulation was adopted to analysis the flow and temperature filed around the pipeline.Different insulation materials,Reynolds number,environment temperature and solar radiation was investigated.The results showed the thermal resistance of insulation has a greater effect on the cold loss in LNG pipeline.With the increase of the thermal resistance of the insulation material,the influence of environment temperature,Reynolds number and solar radiation in cold exergy loss decreased.

Key words: liquefaction, natural gas, numerical simulation, heat transfer, convection

摘要：

对LNG输送管道与其周围环境之间的耦合传热过程进行分析,包括管道与保温层之间的导热以及保温层与周围环境之间的对流传热和辐射,并对LNG输送管道的冷量损失进行了较为完整的分析和计算。用数值仿真对管道周围的流场和温度场进行模拟和分析,比较了不同厚度的保温材料、Reynolds数、环境温度以及阳光辐射等对冷量损失的影响。结果表明保温材料特性对LNG输送管道的冷量损失影响较为敏感。随着保温材料热阻的增加,Reynolds数、环境温度以及阳光辐射对冷量的损失的影响逐渐减小。

关键词: 液化, 天然气, 数值模拟, 传热, 对流

CLC Number:

TQ051.2

HU Zhuohuan, HUANG Tianke, ZHANG Leyi, YANG Mo. Numerical simulation of coupled heat transfer for LNG pipeline[J]. CIESC Journal, 2015, 66(S2): 206-212.

胡卓焕, 黄天科, 张乐毅, 杨茉. LNG输送管道耦合传热的数值模拟[J]. 化工学报, 2015, 66(S2): 206-212.

References 19

[1]	Tang Jianfeng(唐建峰),Cai Na(蔡娜),Guo Qing(郭清).Simulation of LNG diffusion:a continuous vertical jet release[J].CIESC Journal(化工学报),2013,64(3):1124-1131.
[2]	Lu Chao(卢超),Zhuan Rui(耑锐),Yi Chongchong(易冲冲),Wang Wen(王文),Lü Jun(吕俊),Wang Lei(王蕾).BOG pre-cooling numerical simulation at LNG transport pipeline[J].Cryogenics(低温工程),2012, (6):51-56.
[3]	Liang Guangchuan(梁光川),Zheng Yunping(郑云萍),Li Youlü(李又绿),Gao Aihua(高爱华),Pu Hongbin(蒲宏斌).Long distance pipeline transportation technology in LNG[J].Natural Gas and Oil(天然气与石油),2003,21(2):8-10.
[4]	Xu Xinghua(许兴华),Wang Lu(王璐),Zhan Fushuai(战福帅),Liu Xirong(刘锡荣).Thermal analysis on pipeline of liquefied natural gas automobile filling stations[J].Petro-Chemical Equipment(石油化工设备),2014,43(5):49-53.
[5]	Xie Gang(谢刚),Wang Tianming(王天明),Shao Yongjun(邵拥军),Wang Chunyan(王春燕).Calculations for the heat insulation thickness of LNG Pipe[J].Chemical Engineering of Oil & Gas(石油与天然气化工),2007,36(5):373-375.
[6]	Bao Chen(包臣),Mo Haiyuan(莫海元).Numerical simulation on temperature field of cold-keeping layer of LNG pipelines[J].Contemporary Chemical Industry(当代化工),2013,42(11):1608-1610.
[7]	Li Yajun(李亚军),Chen Meng(陈蒙).Simulation-based optimization and analysis of BOG multi-stage compression and recondensation process at LNG receiving terminal[J].CIESC Journal(化工学报),2013,64(3):986-992.
[8]	Wang Tao(王弢),Lin Wensheng(林文胜),Gu Anzhong(顾安忠).Analysis of working fluid and variable working conditions of organic Rankine cycle utilizing LNG cold energy[J].CIESC Journal(化工学报),2010,61(S2):107-111.
[9]	Zhang Hongwei(张宏伟),Tao Wenquan(陶文铨),He Yaling(何雅玲),Feng Zhenping(丰镇平).Numerical study on coupled heat transfer of thrust chamber with regenerative cooling[J].Journal of Aerospace Power(航空动力学报),2006,21(5):930-936.
[10]	Li Longjian(李隆键),Liu Hongtao(刘洪涛),Cui Wenzhi(崔文智).Conjugated heat transfer of natural convection in pool with internal heat sources and convection in the tube[J].Nuclear Power Engineering(核动力工程),2007,28(3):32-37.
[11]	Jurgen G,Stefan G.Coupling methods for heat transfer and heat flow:operator splitting and the parareal algorithm[J].Journal of Mathematical Analysis and Applications,2012,388:873-887.
[12]	Sun H,Li H,Yang D.Coupling heat and mass transfer for a gas mixture-heavy oil system at high pressures and elevated temperatures[J].International Journal of Heat & Mass Transfer,2014,74(5):173-184.
[13]	Zhang L,Liu X,Jiang Y.Exergy analysis of parameter unmatched characteristic in coupled heat and mass transfer between humid air and water[J].International Journal of Heat & Mass Transfer,2015,84:327-338.
[14]	Wei A,Tong Z,Naiping G.Accelerative iteration for coupled conductive-radiative heat transfer computation in semitransparent media[J].International Journal of Heat and Mass Transfer,2015,82:503-509.
[15]	Ait-Taleb T,Abdelbaki A,Zrikem Z.Simulation of coupled heat transfers in a hollow tile with two vertical and three horizontal uniform rectangular cavities heated from below or above[J].Energy & Buildings,2014:628-632.
[16]	Chen Baodong(陈保东),Li Qingjie(李庆杰),Hong Lina(洪丽娜),Yue Chunguang(岳春光).Calculation of transmission process parameters for LNG pipeline[J].Oil & Gas Storage and Transportation(油气储运),2011,30(1):15-17.
[17]	Yang Shiming(杨世铭),Tao Wenquan(陶文铨).Heat Transfer(传热学)[M].Beijing:Higher Education Press,2006:246-247.
[18]	Lai F C,Kulacki F A.Coupled heat and mass transfer by natural convection from vertical surfaces in porous media[J].International Journal of Heat and Mass Transfer,1991,34(4/5):1189-1194.
[19]	Deru M,Judkoff R,Neymark J.Whole building energy simulation with a three-dimensional ground-coupled heat transfer model[J].ASHRAE,2003,109(1):557-565.