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Based on the previous studies, a further experimental investigation on two-component helium and hydrogen mixtures in a two-stage pulse tube refrigerator was carried out. The experimental results using helium and hydrogen mixtures, with 7, 20, 34, 45 and 60% hydrogen, compared to pure helium in 20 K temperature range are presented and showed that both COP and refrigeration power are better than that of using pure helium. The maximum gains in cooling power of 25% and COP of 31% at hydrogen molar fraction 60% have been obtained near 20 K in the experiment. During the cooling process of pulse tube refrigeration with the mixtures, the phenomena of phase transforms and a near stable temperature platform with 0.9 W heat load, which is independent on fraction around the triple phase point of hydrogen (13.95 K), was observed.
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Details
- Original title: Two-stage pulse tube refrigeration with helium and hydrogen mixture.
- Record ID : 2005-2396
- Languages: English
- Source: 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
- Publication date: 2003/08/17
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Experimental study on the safety of helium and ...
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- Date : 2003/04/22
- Languages : English
- Source: Cryogenics and refrigeration. Proceedings of ICCR 2003.
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Investigation on two-stage pulse-tube refrigera...
- Author(s) : GAN Z. H., CHENG Z. Z., CHEN G. B., et al.
- Date : 2003/04/22
- Languages : English
- Source: Cryogenics and refrigeration. Proceedings of ICCR 2003.
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- Author(s) : TANAEVA I. A., WAELE A. T. A. M. de
- Date : 2005/08
- Languages : English
- Source: Cryogenics - vol. 45 - n. 8
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- Author(s) : CHOI Y. S., PAINTER T. A., KIM D. L., et al.
- Date : 2006/06/14
- Languages : English
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Operating performance of pulse-tube refrigerato...
- Author(s) : SHIRAISHI M., FUJISAWA Y., MURAKAMI M.
- Date : 2003/04/22
- Languages : English
- Source: Cryogenics and refrigeration. Proceedings of ICCR 2003.
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