Experimental investigation of an efficient closed-cycle mixed-refrigerant J-T cooler

被引：0
|
作者：
Luo, EC
Liang, J
Zhou, Y
Yakuba, VV
Lobko, MP
机构：
来源：
CRYOCOOLERS 9 | 1997年
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中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
The thermodynamic performance of a closed-cycle Joule-Thomson cryocooler with gas mixtures is experimentally investigated. Good refrigeration performances have been achieved with rather low pressure ratios. The high pressure of the two-stage oil-free compressor ranges from 2.5MPa to 4.5MPa, but the low pressure of the compressor is fixed as 0.1MPa. And the temperature of the inlet of high pressure flow for heat exchanger is fixed as 300K. In the experiment, two kinds of gas mixtures are used. The first one is N-e + CH4 + C2H6 + C3H8 + i-C4H10 and the second one is N-e + CH4 + C2H6 + C3H8. Under the above-mentioned operating conditions, the mixed-refrigerant J-T cooler achieved the lowest temperatures of around 69K-70K and 25W-35W of cooling capacity at liquid nitrogen temperature. The excergy efficiency of the whole cooling system is about 5-9%. The experimental results show that using gas mixtures as working substance is indeed a very potential way to improve the efficiency of Joule-Thomson cryocooler.
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页码：529 / 535
页数：7
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