Abstract
For the purpose of cooling high-temperature superconductor (HTS) devices, such as superconducting motor, a high efficiency Stirling-type cryocooler has been developed by Sumitomo Heavy Industries, Ltd (SHI). The design concepts of cryocooler are high efficiency, compact size, light weight, and high reliability. We have developed a cryocooler with a design target of producing an efficiency COP of 0.07 at 70K and preliminary experiments were conducted. As the experimental results show, the cooling performance achieved a cooling capacity of 150 W at 70K, with a compressor input power 2.15kW, corresponding COP of 0.07 and a no heat load temperature of 36K an operating frequency of 47Hz,cooling water temperature of 30℃. The experimental results are reported in this paper.
