27th International Cryogenics Engineering Conference and International Cryogenic Materials Conference 2018 | |
Characterization of a scroll-type compressor for driving JT cryocoolers working at liquid helium temperature | |
Shen, Y.W.^1^2 ; Gan, Z.H.^1^2 ; Liu, D.L.^1^2^3 ; Chen, S.F.^1^2 ; Yao, Y.F.^1^2 | |
Institute of Refrigeration and Cryogenics, Zhejiang University Hangzhou, 310027, China^1 | |
Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province, Hangzhou | |
310027, China^2 | |
Institute of Advanced Technology, Westlake Institute for Advanced Study, Westlake University, Hangzhou | |
310024, China^3 | |
关键词: Calculation results; Discharge pressures; Exergetic efficiency; Liquid helium temperature; Mass flow rate; Optimal coefficient; Optimal parameter; Suction volume; | |
Others : https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012056/pdf DOI : 10.1088/1757-899X/502/1/012056 |
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来源: IOP | |
【 摘 要 】
The real performance of the compressor significantly affects the optimization results of a Joule-Thomson (JT) cryocooler working at liquid helium temperature. A compressor experimental setup has been built to measure an oil-free scroll-Type compressor. The measured mass-flow rate decreases from 11.7 mg/s to 10.9 mg/s as the pressure ratio increases from 4.2 to 23.3. By fitting the processed measurement results, models of suction volume flow and exergetic efficiency of the compressor are obtained. It is shown that the suction volume flow and exergetic efficiency can be expressed as functions of the pressure ratio. Combining these models, a method to optimize the discharge pressure and precooling temperature for optimal coefficient of performance of the complete JT cryocooler is proposed. The effects of the real performance of the compressor on the optimal parameters of the JT cryocooler are presented with the calculation results.Published under licence by IOP Publishing Ltd.
【 预 览 】
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Characterization of a scroll-type compressor for driving JT cryocoolers working at liquid helium temperature | 1228KB | download |