5 December 2012 Development of high efficiency pulse tube cryocoolers for spaceborne infrared applications
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This paper reviews the recent advances in high efficiency pulse tube cryocoolers (PTCs) in SITP/CAS for space-borne infrared applications. Due to the special aerospace environment where the power supply is limited and the rejection condition is adverse, the high cooler efficiency is especially emphasized. A brief history of the PTC and the last 30-year worldwide quest for highly reliable and efficient PTCs has been provided as a background. Then our efforts to achieve high efficiency coolers are discussed. Three typical geometrical arrangements, U-type, coaxial and in-line, are all involved, while the latter two are stressed on. Some typical development programs are introduced and a brief overview of the relevant data package is presented. To date, the no-load temperature reaches 25 K, and the typical cooling capacities of 0.9W@40K, 4.5W@60K, 8.0W@80K and 12W@95K have been achieved, respectively. For the mature coaxial coolers, the typical relative Carnot efficiencies of 2.8%, 9.4%, 14.4% and 15.7% has been achieved at 40 K, 60 K, 80 K and 95 K, respectively. For the newly-developed high efficiency in-line PTCs, the corresponding values are 2.9%, 9.6%, 16.2% and 17.8%, respectively. The acquired high efficiencies have made them enabling cryocoolers for the aimed space applications. The batch production of the main components has been realized and the typical EM machines have been worked out.
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Haizheng Dang, Haizheng Dang, } "Development of high efficiency pulse tube cryocoolers for spaceborne infrared applications", Proc. SPIE 8562, Infrared, Millimeter-Wave, and Terahertz Technologies II, 85620K (5 December 2012); doi: 10.1117/12.999356; https://doi.org/10.1117/12.999356


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