一种在线测量杜瓦冷损的数值方法  

A Numerical Method of In-situ Measurement of Dewar Heat Leakage

作　　者：张海燕[1] 管建安[1] 汪洋[1] 陈安森[1] 龚海梅[1] 

机构地区：[1]中国科学院上海技术物理研究所传感技术国家重点实验室红外成像材料与器件重点实验室,上海200083

出　　处：《半导体光电》2015年第6期909-913,共5页Semiconductor Optoelectronics

摘　　要：提出了一种在线测量杜瓦辐射漏热、传导漏热及总漏热的数值方法。该方法利用了杜瓦冷头温度变化与辐射漏热、传导漏热之间的函数关系,通过对冷头的温度变化曲线进行数值拟合,逆向导出冷损的表达式。在不破坏原有杜瓦与制冷机耦合状态的情况下同时测出杜瓦的辐射漏热及热传导漏热,不但解决了热学异常的原因定位问题,也给出了在各个温度下的两种漏热具体值。试验结果表明,该方法简单高效,测试结果可靠,为杜瓦的热学设计及热学失效分析提供了有效的试验验证手段。A numerical method of in-situ measurement of the heat leakage of dewar including radiative heat leakage,conductive heat leakage and total heat leakage was proposed.Using the functional relation between the temperature change of the cold head of the dewar and the heat leakage,the mathematical expression of the heat leakage by numerically fitting the temperature change curve of the cold head was reversely derived.This method makes it possible to get the radiative heat leakage and conductive heat leakage simultaneously under the condition of unchanging the coupling of dewar with refrigerator.It gives the solutions not only for finding the cause of thermal abnormity but also getting the value of both radiative and conductive leakage at each temperature.Experiments show that this method is simple and efficient with reliable result.It provides an effective tool for thermal design and failure analysis of the dewar.

关 键 词：冷损 辐射 漏热 数值方法 杜瓦 

分 类 号：TN215[电子电信—物理电子学]