A three-stage Stirling pulse tube cryocooler reached 4.26 K with He-4 working fluid

作者：Zhi, X. Q.; Han, L.; Dietrich, M.; Gan, Z. H.; Qiu, L. M.^*; Thummes, G.

来源：Cryogenics, 2013, 58: 93-96.

DOI：10.1016/j.cryogenics.2013.09.009

• Stirling pulse tube cryocooler
• Liquid helium temperature
• Cooling performance

Multi-stage Stirling pulse tube cryocoolers (SPTCs) working at liquid helium temperatures are attractive because of their promising potential in tactical and space applications. However, it is still a challenge for a SPTC to operate below 5 K with He-4 as working fluid instead of the rare He-3. In this study, the operating characteristics of an in-house made three-stage SPTC were experimentally investigated. The mutual influence of precooling temperature, operating frequency, input power, and charge pressure on the cooling performance of the third stage was studied. A no-load temperature of 426 K was achieved by the three-stage SPTC, which is the lowest temperature ever obtained by a multi-stage SPTC operating with He-4 as working fluid.

• 出版日期2013-12
• 单位浙江大学