基于动态传热模型的车载LNG气瓶日蒸发率检测  

Detection of Daily Evaporation Rate of On-vehicle LNG Gas Cylinder Based on Dynamic Heat Transfer Model

作　　者：崔仕博 杨宇博[1,2] CUI Shibo;YANG Yubo(Tianjin Special Equipment Inspection Institute,Tianjin 300192,China;Key Laboratory of Digital Twin Generic Technology in Special Equipment for State Market Regulation,Tianjin 300192,China)

机构地区：[1]天津市特种设备监督检验技术研究院,天津300192 [2]国家市场监管重点实验室(特种设备数字孪生共性技术),天津300192

出　　处：《低温与特气》2024年第2期7-10,20,共5页Low Temperature and Specialty Gases

基　　金：天津市市场监督管理委员会科技计划项目"焊接绝热气瓶静态蒸发率(称重法)智能检测平台"(2021-W22)。

摘　　要：车载LNG气瓶是一种储存低温液化气体的低温绝热气瓶装置,其标准日蒸发率测试过于耗时,给使用单位的正常运行带来很大困扰。将辐射传热简化为热传导传热,建立了静置阶段和测试阶段的传热模型,求解了日蒸发率的解析式,并与实际检测数据进行了对比。结果表明,模型与检测数据相符合,提高充装量可以缩短静置时间,气瓶内胆材料的热容是产生长静置时间的原因。The on-vehicle LNG cylinder is a cryogenic insulation cylinder device for storing cryogenic liquefied gases.The standard daily evaporation rate test is too time-consuming,which greatly hinders the normal operation of the user unit.In this paper,a dynamic heat transfer model,for standing section and testing section,is developed and simplified by replacing radiant heat transfer with thermal conduction.The model is solved and compared with experiment data.As shown by result,the model fits data well,and higher filling quantity leads to shorter standing time,and the heat captain of the inner material is the main reason to long standing time.

关 键 词：绝热气瓶 日蒸发率 动态传热 

分 类 号：TE8[石油与天然气工程—油气储运工程]