Development status of a high cooling capacity single stage pulse tube cryocooler

[摘要] High temperature superconducting (HTS) applications require high-capacity and high-reliability cooling solutions to keep HTS materials at temperatures of approximately 80 K. In order to meet such requirements, Sumitomo Heavy Industries, Ltd.(SHI) has been developing high cooling capacity GM-type active-buffer pulse tube cryocooler. An experimental unit was designed, built and tested. A cooling capacity of 390.5 W at 80 K, COP 0.042 was achieved with an input power of approximately 9 kW. The cold stage usually reaches a stable temperature of about 25 K within one hour starting at room temperature. Also, a simplified analysis was carried out to better understand the experimental unit. In the analysis, the regenerator, thermal conduction, heat exchanger and radiation losses were calculated. The net cooling capacity was about 80% of the PV work. The experimental results, the analysis method and results are reported in this paper.

[发布机构] Technology Research Center, Sumitomo Heavy Industries, Ltd., 2-1-1 Yato-Cho, Nishitokyo-City, Tokyo; 188-8585, Japan^1;Precision Equipment Group, Sumitomo Heavy Industries, Ltd., 2-1-1 Yato-Cho, Nishitokyo-City, Tokyo; 188-8585, Japan^2;School of Mechanical Engineering, Tongji University, 4800 Cao'an Road, Shanghai; 201804, China^3

[效力级别] 物理学 [学科分类] 材料科学（综合）

[关键词] Cooling solutions;Development status;High reliability;High temperature superconducting;Pulse tube cryocoolers;Simplified analysis;Sumitomo heavy industries;Thermal conduction