Experimental study on pulse tube refrigeration with helium and nitrogen mixtures

Authors
Gan, ZH Chen, GB Thummes, G Heiden, C
Citation
Zh. Gan et al., Experimental study on pulse tube refrigeration with helium and nitrogen mixtures, CRYOGENICS, 40(4-5), 2000, pp. 333-339
Citations number
10
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Mechanical Engineering
Journal title
CRYOGENICS
ISSN journal
00112275 → ACNP
Volume
40
Issue
4-5
Year of publication
2000
Pages
333 - 339
Database
ISI
SICI code
0011-2275(200004/05)40:4-5<333:ESOPTR>2.0.ZU;2-2
Abstract
An experimental investigation on two-component multi-phase helium and nitro gen mixtures in a single-stage pulse tube refrigerator was carried out. The experimental results show that both coefficient of performance (COP) and c ooling 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 temperatur e 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. (C) 2000 Elsevier Science Ltd. All rights reserved.