Investigation on Precooling Effects of 4 K Stirling-Type Pulse Tube Cryocoolers

doi:10.1007/s11630-019-1168-7

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	Investigation on Precooling Effects of 4 K Stirling-Type Pulse Tube Cryocoolers
	Cao Qiang; Li Zimu; Luan Mingkai; Sun Zheng; Tang Xiao; Li Peng; Jiang Zhenhua; Wei Li
刊名	JOURNAL OF THERMAL SCIENCE
	2019
卷号	28 期号:4 页码:714-726
关键词	stirling-type pulse tube cryocooler precooling effects liquid-helium temperatures
DOI	10.1007/s11630-019-1168-7
英文摘要	Stirling-type pulse tube cryocoolers (SPTCs) working at liquid-helium temperatures are appealing in space applications because of their promising advantages such as high reliability, compactness, etc. Worldwide efforts have been put in to develop SPTCs operating at liquid-helium temperatures especially with helium-4 as the working fluid. Staged structure is essential to reach such low temperatures. Generally, both the regenerator of the last section and the pulse tube together with the phase shifter are precooled by its upper stage or by external cold source to a low temperature of around 20 K. However, the precooling effects on the regenerator and the pulse tube are synthetic in previous studies, and their independent effects have not been studied clearly. In this manuscript, the precooling effects on the regenerator and on the pulse tube together with the phase shifter are tested independently on a unique-designed precooled SPTC. The tested precooling temperature is between 13.3 K and 22 K, and the no-load refrigeration temperature gets down to 3.6 K. Further analyses and numerical calculations have been carried out. It is found that the influence on the regenerator is remarkable, which is different from previous conclusions. It is also found that the precooling effects on the pulse tube are relatively weak because of the large pressure-induced enthalpy flow of a real gas working at the temperatures near to the critical point. Furthermore, the phase shifting capacity is analyzed with two cases and with both helium-4 and helium-3 as working fluids, and it keeps quite constant after optimizing the frequency and the precooling temperature for each case. The investigation on these independent effects will provide valid reference on the precooling mechanism study of SPTCs working down to liquid-helium temperatures.
WOS记录号	WOS:473742000011
内容类型	期刊论文
源URL	[http://202.127.2.71:8080/handle/181331/12352]
专题	上海技术物理研究所_上海技物所
推荐引用方式 GB/T 7714	Cao Qiang,Li Zimu,Luan Mingkai,et al. Investigation on Precooling Effects of 4 K Stirling-Type Pulse Tube Cryocoolers[J]. JOURNAL OF THERMAL SCIENCE,2019,28(4):714-726.
APA	Cao Qiang.,Li Zimu.,Luan Mingkai.,Sun Zheng.,Tang Xiao.,...&Wei Li.(2019).Investigation on Precooling Effects of 4 K Stirling-Type Pulse Tube Cryocoolers.JOURNAL OF THERMAL SCIENCE,28(4),714-726.
MLA	Cao Qiang,et al."Investigation on Precooling Effects of 4 K Stirling-Type Pulse Tube Cryocoolers".JOURNAL OF THERMAL SCIENCE 28.4(2019):714-726.