液化天然气加气站管道热力分析.pdf

第43卷第5期
石油化工设备
Vol 43 No 5
2014年9月
PETRO-CHEMICAL EQUIPMENT
文章编号:1000-7466(2014)05-0049-06
液化天然气加气站管道热力分析
许兴华1,王璐',战福帅2,刘锡荣2
(1.中国石油大学(华东)化学工程学院,山东青岛266580
2.青岛捷能高新技术有限责任公司,山东青岛266510)
摘要:对液化天然气加气站管道内部低温液化天然气与环境空气间的传热过程进行了分析,提出
了加气站管道冷能损失量的计算方法。通过编程对加气站日气化量进行送代求解,分析了管道冷
蚤损失的部分影响因素。结果表明,管道内部的液化天然气温度对整个加气站的冷能损失影响不
大,故管道内部的液化天然气可以维持比较低的温度而不会产生较大的冷能损失;保温层厚度对加
气站冷能损失的影响最明显,但保温层厚度的选取需要同时考虑保温效果和经济性两个方面;环境
温度的改变对加气站的冷能损失影响也比較明显,夏天的冷量损失要比冬天的冷量损失高出
28.2%左右
关键词:液化天然气加气站;热力分析;迭代计算;冷能损失
中图分类号:TE821;TQ055.8文献标志码:Adoi:10.3969/j.isn.10007466.2014.05.011
Thermal Analysis on Pipeline of Liquefied Natural
Gas Automobile Filling Stations
XU Xing-hua, WANG Lu, ZHAN Fu-shuai, LIU Xi-rong'
(1. School of Chemical Engineering, China University of Petroleum
(East China), Qingdao 266580, China; 2. Qingdao Jieneng High &
New Technology Co. Ltd, Qingdao 266510, China)
Abstract The heat transfer processing of pipeline between low temperature liquefied natural gas
and ambient air in liquefied natural gas station was studied and a calculation method for pipeline
cold energy loss was put forward. Equivalent amount of gasification in liquefied natural gas sta
tions was calculated by writing iterator, and some influencing factors of cold mass loss were ana-
lyzed. The predicted results showed that the temperature of liquefied natural gas had little influ-
ence on cold energy loss of the liquefied natural gas stations, so liquefied natural gas could keep a
lower temperature without more cold energy loss. Insulation thickness had a significant effect on
cold energy loss, but the thickness of insulation should be considered on both thermal insulation
effect and economical efficiency, The changing of the environment temperature had certain effect
on cold energy loss, which predicted that cold energy loss in summer was one-third higher than
that in winte
Key words: liquefied natural gas stations; thermal analysis; iterative calculation; cold energy loss
近年来,随着人们环保意识的提高,清洁能源天烷,与传统的燃料汽油和柴油相比,天然气燃烧后
然气得到了广泛的应用。天然气的主要成分是甲CO:和NO2的排放量要小得多,因此,以天然气为
收稿日期:2014-
作者简介:许兴华(1989-),男,江苏东台人,硕士研究生,现从事化工过程装备的相关研究