基于低温恒温器的温度计接触热阻仿真与实验研究
Simulation and experimental research on thermometer thermal resistance based on cryogenic thermostat
秦海玲 1周刚 1刘立强2
作者信息
- 1. 中国科学院理化技术研究所低温科学与技术重点实验室,北京 100190
- 2. 中国科学院理化技术研究所低温科学与技术重点实验室,北京 100190;中国科学院大学,北京 100049
- 折叠
摘要
为探究温度计接触热阻对测温的影响,利用低温恒温器测量系统建立了 Cernox温度计接触热阻模型;在4.2K～20K温区内,对温度计在不同安装介质和激励电流下的测温温度及接触热阻做了对比实验,并用多电流法进行了修正.仿真和实验结果显示,温度计因自身特性产生的接触热阻可忽略不计,在相同激励电流下,清漆2115在降低接触热阻方面相对最优.
Abstract
To investigate the effect of contact thermal resistance of thermometers on temperature measurement,the model of Cernox thermometer was established using a cryogenic thermostat thermostat measurement system;Comparative experiments under different mounting medium and excitation currents in the temperature range of 4.2 K to 20 K were conducted,and the experimen-tal results were corrected using the multi current method.Simulation and experimental results show that the contact thermal resist-ance generated by the thermometer due to its own characteristics has a negligible impact.Under the same excitation current,var-nish 2115 is relatively optimal in reducing contact thermal resistance.
关键词
Cernox温度计/接触热阻/COMSOL仿真/低温恒温器Key words
Cernox thermometer/Thermal resistance/COMSOL simulation/Cryogenic thermostat引用本文复制引用
基金项目
中国科学院低温科学与技术重点实验室开放研究课题(SKLTSCP1803)
出版年
2024
NETL
NSTL
万方数据