基于VD-MLI技术的低温液体BOG再液化实验装置漏热分析  

Thermal analysis of cryogenic liquid BOG reliquefaction experiment device based on VD-MLI technology

作　　者：任金平[1] 陈叔平[1] 姚淑婷[1] 王丽红[2] 王田刚[2] 任永平[1] 李延娜[1] 

机构地区：[1]兰州理工大学石油化工学院,兰州730050 [2]真空低温技术与物理重点实验室、兰州空间技术物理研究所,兰州730000

出　　处：《低温与超导》2014年第9期20-24,82,共6页Cryogenics and Superconductivity

基　　金：真空低温技术与物理重点实验室开放式基金项目(ZDK201301)资助

摘　　要：为研究低温液体蒸发气(BOG)再液化技术,设计了基于变密度多层绝热(VD-MLI)技术的低温液体BOG再液化实验装置。储罐绝热层采用三区域变密度多层绝热结构,从内到外层密度依次为0.8层/mm、1.2层/mm、1.6层/mm,总层数为36层,总厚度为30mm。对低温储罐各部分漏热进行了分析,并采用Lockheed模型对VD-MLI漏热量进行计算。结果表明,颈管漏热量占总漏热量的57.5%,是影响储罐绝热性能的主要因素;绝热层的漏热最小,仅占总漏热量的12.6%。储罐总漏热量为3.01W,满足制冷系统要求,为后续开展零蒸发(ZBO)储存技术研究提供了理论基础和试验条件。In order to study the reliquefaction technology of cryogenic liquid boil off gas（BOG）, an experiment device for cryogenic liquid BOG reliquefaction was designed, and variable - density multilayer insulation （ VD - MLI ） with three regions structure was adopted for the heat insulation of tank. From inside to outside the layer densities were 0.8 layer/mm, 1.2 layer/ mm and 1.6 layer/ram respectively, the total number of shields was 36 and the total thickness was 30 mm. The heat leakage of each part of cryogenic tank was analyzed, and the heat leakage of VD - MLI was calculated with Lockheed model. The results show that the heat leakage of neck tube accounts for 57.5% of the total heat leakage and is the main factor of influencing the in- sulation performance of tank; the heat leakage of heat insulating layer is minimum , only 12.6% of the total heat leakage. The total heat leakage of tank is 3.01W, and meets the requirement of the refrigeration system. This will provide a theoretical basis and experimental condition for the study of ZBO storage technology.

关 键 词：BOG 低温储罐 VD-MLI 漏热量 

分 类 号：TB658[一般工业技术—制冷工程]