A Gifford-McMahon cycle cryocooler below 2K

被引：0

作者：

Satoh, T ^{[1
]}

Onishi, A ^{[1
]}

Umehara, I ^{[1
]}

Adachi, Y ^{[1
]}

Sato, K ^{[1
]}

Minehara, EJ ^{[1
]}

机构：

[1] Sumitomo Heavy Ind Ltd, Ctr Res & Dev, Hiratsuka, Kanagawa 2540806, Japan

来源：

CRYOCOOLERS 11 | 2001年

关键词：

D O I：

暂无

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

According to theory, a Gifford-McMahon (GM) cycle cryocooler with He-4 cannot cool below 2 K because of the He-4 superfluid transition near this temperature. However replacing 4 He by He-3 removes this temperature limitation. The cooling performance of a GM cryocooler with a HoCu2 magnetic regenerator material is investigated using He-3. The minimum temperature of 2.3 K with He-4 goes down to 1.65 K when the He-4 working fluid is replaced by He-3. The maximum cooling capacity at 2 K is 53.9 mW with a compressor power of about 2.5 kW, and the cooling capacity at 4.2 K is enhanced by more than 20%. The effect of a new regenerator material (NdInCu2) on the cooling performance was also investigated. The minimum temperature decreased to 1.64 K and the cooling capacity at 2 K improved to 57.1 mW with the use of this material in the bottom 40% of the regenerator.

引用

页码：381 / 386

页数：6

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