Speaker
Description
Improvement of high temperature superconducting materials lead to a new development of various applications such as superconducting motor, superconducting power transmission cable and superconducting power generator, etc. Those applications require a high capacity and high reliable cooling solution to keep high temperature superconducting materials being around 80K.
In order to meet such requirement, Sumitomo Heavy Industries, Ltd. (SHI) has been developing high cooling capacity single stage pulse tube cryocoolers. In general, pulse tube cryocooler is more reliable than Gifford-McMahon cryocooler or Stirling cryocooler because there are no moving parts at low temperature.
We developed a prototype unit which can provide 364 W cooling power at 80 K and COP is 0.04. The parameters such as the flow smoother length, the regenerator size and the operating frequency, etc., are tested and optimized.
The latest development status and test results will be discussed in this paper.
