Abstract
We have been developing a Stirling type pulse tube cryocooler, aiming for a cooling capacity of 200W at 80K for a superconducting magnetic energy storage system. In this work, we adopted stainless steel meshes for the regenerator of the cryocooler, and studied the influences of the mesh number on the cooling capacity. The prepared mesh numbers were #150, 200, 250, 350 and 400. Using #250 mesh, and at a frequency of 45Hz and power consumption of 3.1kW, the achievable lowest temperature and cooling capacity at 80K was 46.2K and 123W, respectively. Furthermore, in order to optimize the performance, some regenerators were made by stacking several kinds of meshes with different stacking orders. Using these regenerators, we have obtained a high cooling capacity of 169W at 80K with power consumption of 4kW.
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