摘要
汉普逊型J-T效应制冷器结构不紧凑,其支撑芯轴占据较大空间,换热效率低。为提高其换热性能,将换热效率高的微槽道技术应用于J-T效应制冷器,设计出一种新型的多层微槽道J-T效应制冷器试件,并搭建实验台对其进行性能测试与分析。实验以进口温度7.5℃和10.5℃,进口压力4 MPa至8 MPa的氩气为冷源,对各测点的温度进行采集,并完成冷端温度的性能测试与分析。实验表明,在相同的进气温度下,随着进气压力增高,冷端温度降低,在进气温度为10.5℃、压力为8MPa时冷端温度最低可达-41.1℃。同时,在相同的进气压力下,冷端温度随进气温度的降低而降低,在进气压力7 MPa下,进口温度7.5℃比10.5℃的冷端温度低6.1℃。
The structure of Hampson J-T cryocooler is not compact because its core shaft occupies a large space inside cryocooler, which leads to low heat exchange efficiency. To improve the heat transfer performance, microchannel with high heat exchange efficiency is applied in J-T cryocooler. A new muhilayers micro channel J-T cryocooler is designed and an experimental rig is built for testing and analyzing its performance. The experiment takes the argon with inlet temperature of 7.5℃ and 10.5 ℃ , and the inlet pressure between 4 MPa and 8 MPa as the cold source. The temperature of each measurement point is collected and the performance test and the analysis of the cold end temperature is accomplished. The experiment result shows that the higher the inlet gas pressure is, the lower the cold end temperature is under same inlet temperature,When the inlet temperature is 10.5 ℃ and the pressure is 8MPa, the cold end temperature can reach -41.1 ℃. Meanwhile, the lower the temperature of inlet gas is, the lower the cold endtemperature is. When the pressure is 7 MPa, the cold end temperature under the inlet temperature of 7.5 ℃ is 6.1℃ lower than that of 10.5 ℃.
作者
王文卿
崔晓钰
耿晖
韩小晨
翁建华
Wang Wenqing Cui Xiaoyu Geng Hui Han Xiaochen Weng Jianhua(School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093 ,China School of Enery and Mechanical Engineering,Shanghai University of Electric Power, Shanghai 200090,China)
出处
《低温工程》
CAS
CSCD
北大核心
2016年第5期46-50,共5页
Cryogenics
基金
上海市自然科学基金项目(14ZR1429100)项目资助
关键词
微型节流制冷器
氩气
实验系统
制冷性能
micro Joule-Thomson cooler
argon
experimental system
refrigeration performance
