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期刊论文
Experimental study on pulse tube refrigeration with helium and nitrogen mixtures☆
Cryogenics 40(2000)333-339，-0001，（）：
An experimental investigation on two-component multi-phase helium and nitrogen mixtures in a single-stage pulse tube refrigerator was carried out. The experimental results show that both coeÅcient of performance (COP) and cooling power can be improved to some extent at above 70 K when the nitrogen fraction in the mixture is less than 25%. An approximate stable temperature platform at the triple point 63.15 K of nitrogen, which is independent of nitrogen’s fraction, is obtained when the cooling power is below 7 W.
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