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

WANG Tao; AN Yuhui; CHANG Xuanyu

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

更新时间：2025-12-10

- Analysis of temperature and pressure variation of type C independent cargo tank for LNG carrier
- CIESC Journal Issue S2, Pages: 473-479(2018)
- 作者机构：
  
  中国船舶及海洋工程设计研究院,上海,200011
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20181114
  CLC： 674.13+3.3
- Online First：31 December 2018，
  
  Published：31 December 2018
- 稿件说明：
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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, (S2): 473-479.
DOI：

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, (S2): 473-479. DOI： 10.11949/j.issn.0438-1157.20181114.

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。

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.

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