低温储罐充液后夹层压力变化规律  

Variation of interspace pressure of cryogenic tanks after liquid filling

作　　者：陈叔平[1] 王鹏程[1] 殷劲松 赖永才 王炼 陈光奇 

机构地区：[1]兰州理工大学石油化工学院,兰州730050 [2]张家港富瑞特种装备股份有限公司,张家港215637 [3]国家低温容器质量监督检验中心,兰州730000

出　　处：《低温与超导》2009年第12期1-3,7,共4页Cryogenics and Superconductivity

基　　金：国家"863"计划项目(2008AA11A132)资助

摘　　要：低温储罐在充液后内罐因温度下降而冷缩,夹层空间增大,同时夹层温度也将下降,综合作用使夹层真空度升高及绝对压力下降,这对低温容器绝热是有利的。为了计算充液后夹层压力的大小,研究了低温容器充液后内罐冷缩及夹层温度变化情况,给出了夹层压力的计算公式。实例计算表明充液后夹层压力下降显著。Filling cryogenic tanks with cryogenic liquids will cause the inner vessels to contract, interspace volume to enlarge as well as interspace temperature to decrease, and finally result in the rise of interspace vacuum, that is, the decline of interspace pressure. This is favorable for the insulation of cryogenic tanks. For estimating interspace pressure, the cold - contrac- tion of inner vessels and variation of interspace pressure were studied, and the calculation formula of interspace pressure was given. The result shows the interspace pressure has an obvious decline after filled with cryogenic liquid.

关 键 词：低温储罐 夹层压力 充液 冷收缩 

分 类 号：TB657.9[一般工业技术—制冷工程] TU991.36[建筑科学—市政工程]