摘要
低温流体的输送广泛采用发泡绝热管道和真空绝热管道,采用贴壁式热电阻温度传感器测量管内流体温度时,影响测量精度的因素很多。运用一维稳态径向传热模型和热阻网络分析了发泡绝热结构和真空绝热结构下的热阻组成及热平衡关系,得到了温度传感器所测的温度与管道流体温度以及外界环境温度之间的计算关系式,并定量分析了接触热阻和真空度对输送液氮管道的温度传感器所测温度的影响。
Foam insulation pipe and vacuum insulation pipe are widely used to convey cryogenic fluid. There are many factors affect the measurement accuracy when adherent thermal resistance temperature sen- sor is used to measure the fluid temperature. This paper uses one-dimensional steady radial heat transfer model and thermal resistance network to analyze the thermal equilibrium relationship and the structure of thermal resistance of foam insulation pipe and vacuum insulation pipe. The computational relationship among temperature measured by temperature sensor and that of fluid and the ambient temperature is obtained, meanwhile quantitative analysis of the influence of the contact thermal resistance and vacuum degree on measured temperature measurement of liquid nitrogen pipeline.
作者
王永
梁文清
钱华
陈虹
Yong Wang Wen Qing Liang HuaQian Hong Chen(School of Energy and Environment, South East University, Nangjing 210096,China State Key Laboratory of Technologies in Space Cryogenic Propellants, Beijing 10028, China)
出处
《低温工程》
CAS
CSCD
北大核心
2016年第5期39-45,共7页
Cryogenics
基金
航天低温推进剂国家重点实验室开放课题(SKLTSCP1512)资助
关键词
低温流体
发泡绝热管道
真空绝热管道
贴壁式温度传感器
热阻
cryogenic fluid
foam insulation pipe
vacuum insulation pipe
adherent temperature sensor
thermal resistance
