Experimental study on a floating scroll-type compressor driving a precooled JT cryocooler
Experimental study on a floating scroll-type compressor driving a precooled JT cryocooler
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浮动涡旋压缩机驱动预冷JT制冷机的实验研究
DOI：
10.1016/j.applthermaleng.2020.115627
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发表时间：
2020
影响因子：
6.4
通讯作者：
Min Qiu
中科院分区：
文献类型：
--
作者：
Yunwei Shen;Dongli Liu;Lei Liu;Sizhuo Li;Shuhang Chen;Zhihua Gan;Min Qiu
压缩机的性能直接影响焦耳-汤姆逊制冷机的能量和空间利用率。介绍了一种结构简单、压比高的带背压调节阀的单级无油浮动涡旋压缩机，用于驱动预冷的Joule-Thomson制冷机接近液氦温度。介绍了该制冷机的冷却和压力调节过程。在液氦温度下获得了稳定的制冷量，验证了该压缩机的可用性。通过调节压缩机的背压，发现存在一个最佳背压，在此背压下，压缩机的（火用）效率最大，且性能稳定。
The performance of the compressor directly affects the energy and space usage of a Joule-Thomson cryocooler. Characterized by simplicity and high pressure ratio, a single-stage oil-free floating scroll-type compressor with a back pressure regulating valve is introduced to drive the precooled Joule-Thomson cryocooler to approach liquid helium temperature. Cool down and pressure regulation processes of this Joule-Thomson cryocooler are presented. The stable cooling capacity at liquid helium temperature is achieved by which the availability of this compressor is verified. By regulating the back pressure of the compressor, it is found that there exists an optimal back pressure with which the exergetic efficiency of the compressor can be maximized keeping a stable performance.