Analysis of temperature and pressure variation of type C independent cargo tank for LNG carrier

doi:10.11949/j.issn.0438-1157.20181114

CIESC Journal ›› 2018, Vol. 69 ›› Issue (S2): 473-479.DOI: 10.11949/j.issn.0438-1157.20181114

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Analysis of temperature and pressure variation of type C independent cargo tank for LNG carrier

WANG Tao, AN Yuhui, CHANG Xuanyu

Marine Design & Research Institute of China, Shanghai 200011, China

Received:2018-10-08 Revised:2018-10-23 Online:2018-12-31 Published:2018-12-31

C型独立货舱LNG船温度压力变化分析

王弢, 安毓辉, 常烜宇

中国船舶及海洋工程设计研究院, 上海 200011

基金资助:
高技术船舶科研计划支持项目。

Abstract

Abstract:

For semi-refrigerated and semi-pressurized liquified natural gas(LNG) carrier without liquefaction systems, the temperature and pressure in the tank will gradually increase in voyage, with the density and volume of the liquid cargo will change accordingly. In this paper, a simplified method for calculating the daily variation of temperature and pressure of a 14000 m³ LNG carrier is proposed. The calculation results show that the deviation of the daily variation of temperature and pressure calculated by the simplified method is small under the condition of higher loading rate, which can meet the basic requirements of engineering calculation. The relationship between the loading rate and the maximum allowable relief valve setting and the influence of the loading rate on the temperature and pressure of the liquid cargo are also discussed and analyzed.

摘要：

对于没有配置再液化系统的半冷半压型液化天然气运输船，液货舱内的温度、压力在航程中会逐渐上升，同时液货的密度和体积也会相应改变。以14000 m³液化天然气运输船为研究对象，提出温度和压力日变化量的简化计算方法，经过实船计算验证，在装载率较高的情况下，采用简化方法计算的温度和压力日变化量的偏差较小，可满足基本的工程计算要求。讨论并分析了装载率和储罐压力释放阀最大许用设定值之间的关系以及装载率对液货温度压力变化规律的影响。

CLC Number:

U674.13⁺3.3

WANG Tao, AN Yuhui, CHANG Xuanyu. Analysis of temperature and pressure variation of type C independent cargo tank for LNG carrier[J]. CIESC Journal, 2018, 69(S2): 473-479.

王弢, 安毓辉, 常烜宇. C型独立货舱LNG船温度压力变化分析[J]. 化工学报, 2018, 69(S2): 473-479.

References

[1] 中国船级社.散装运输液化气体船舶构造与设备规范[S].北京:人民交通出版社,2018.China Classification Society.Rules for Construction and Equipment of Ships Carrying Liquefied Gases in Bulk[S].Beijing:China Communications Press, 2018.
[2] International Maritime Organization.International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk (IGC Code)[S].London:IMO, 2018.
[3] 顾安忠.液化天然气技术[M].2版.北京:机械工业出版社, 2015.GU A Z.The Liquefied Natural Gas Technology[M].2nd ed.Beijing:China Machine Press, 2015.
[4] 李玉星, 王武昌, 乔国发, 等.密闭LNG储罐内的压力和蒸发率[J].化工学报, 2010, 61(5):1241-1246.LI Y X, WANG W C, QIAO G F, et al.Pressure and evaporation rate in a closed LNG tank[J].CIESC Journal, 2010, 61(5):1241-1246.
[5] 徐烈,孙恒,李兆慈,等.温度与充满率对低温容器无损贮存性能的影响[J].化工学报, 2001, 52(10):891-895.XU L, SUN H, LI Z C, et al.Effects of temperature and liquid volume fraction on performance of non-loss storage in cryogenic vessels[J].Journal of Chemical Industry and Engineering (China), 2001, 52(10):891-895.
[6] KRIKKIS R N.A thermodynamic and heat transfer model for LNG ageing during ship transportation.Towards an efficient boil-off gas management[J].Cryogenics, 2018, 92:76-83.
[7] CHEN Q S, WEGRZYN J, PRASAD V.Analysis of temperature and pressure changes in liquefied natural gas (LNG) cryogenic tanks[J].Cryogenics, 2004, 44(10):701-709.
[8] MIANA M, HOYO R, RODRIGÁLVAREZ V, et al.Calculation models for prediction of liquefied natural gas (LNG) ageing during ship transportation[J].Applied Energy, 2010, 87:1687-1700.
[9] MIANA M, HOYO R, RODRIGÁLVAREZ V.Comparison of evaporation rate and heat flow models for prediction of liquefied natural gas (LNG) ageing during ship transportation[J].Fuel, 2016, 177:87-106.
[10] MIGLIORE C, SALEHI A, VESOVIC V.A non-equilibrium app-roach to modelling the weathering of stored liquefied natural gas (LNG)[J].Energy, 2017, 124:684-692.
[11] International Maritime Organization.Development of International Code of Safety for Ships Using Gases or Other Low-flashpoint Fuels (IGF Code)[S].London:IMO, 2016.
[12] CHO J, LIM G J, KIM S J, et al.Liquefied natural gas inventory routing problem under uncertain weather conditions[J].International Journal of Production Economics, 2018, 204:18-29.
[13] 傅允准, 祁亮, 巨永林, 等.B型独立LNG液货舱漏热量及蒸发率影响因素模拟分析[J].船舶工程, 2015, 37(4):12-16.FU Y Z, QI L, JU Y L, et al.Simulation analysis of influencing factors on heat leakage and evaporation rate of type B LNG independent liquid tank[J].Ship Engineering, 2015, 37(4):12-16.
[14] 夏华波, 孙恪成, 时光志, 等.30000立方米LNG船液货舱传热分析[J].船舶工程, 2014, 36(2):34-36, 61.XIA H B, SUN K C, SHI G Z.Analysis of liquid cargo tank heat transfer on 30000m³ LNG ship[J].Ship Engineering, 2014, 36(2):34-36, 61.
[15] 章伟星,周昊,蔡洙一, 等.138000m³ LNG运输船液货舱维护系统的温度场分析[J].中国造船, 2008, 49(1):77-83.ZHANG W X, ZHOU H, CAI Z Y, et al.The temperature field analysis for the tank insulation system of 138000m³ LNG carrier[J].Shipbuilding of China, 2008, 49(1):77-83.

Analysis of temperature and pressure variation of type C independent cargo tank for LNG carrier

C型独立货舱LNG船温度压力变化分析

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