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《Journal of Zhejiang University(Engineering Science)》 2007-04
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Influence factors on separate two-stage pulse tube cooler working at liquid helium temperature

HE Yong-lin,QIU Li-min,GAN Zhi-hua,ZHANG Xiao-bing,LU Jie,CHEN Guo-bang (Institute of Refrigeration and Cryogenics,Zhejiang University,Hangzhou 310027,China)  
A 4 K separate two-stage pulse tube cooler(PTC) was designed and manufactured.Driven by one compressor and one rotary valve mode,the lowest temperature was 2.5 K,and cooling capacities of 590 mW at 4.2 K and 15.0 W at 36.7 K were achieved with an actual input power of 6.7 kW.Experimental results showed that the PTC can supply cooling capacities at both 4.2 and 40 K with high efficiency and can be used to replace the GM cooler to cool super-conducting magnets,cryopumps and electrical devices.Influences of valve timing and different compressors on the cooling performance of the 4 K separate two-stage PTC were also investigated by experiments.
【Fund】: 国家自然科学基金重点资助项目(50536040);; 霍英东基金优选资助项目(94013)
【CateGory Index】: TB651
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