Feasibility and Pre-Conceptual Studies For Cryogenic Gaseous Helium Circulation System For HTS Applications

The phenomenal rise of high temperature superconductor (HTS) opened the era of entirely new and wide spectrum of its application in space, military, energy, power system and for fusion relevant magnets. Liquid Nitrogen (LN2) is currently used as standard cryogenic fluid as it offers low cost, ease of availability, cooling capability. But due to limitations such as operating temperature range (63 K-77 K), the large size of cooling setup and multiple phases, makes it less desirable for application requiring compact sizes. The use of force flow cryogenic gaseous helium (GHe) is seen as a favorable solution for such specific applications. The pros and cons of various LN2 based cooling techniques with respect GHe based cooling system are discussed in this paper. The feasibility of forced flow cryogenic GHe based cooling system (GHCS) for various HTS based application is investigated. The pre-conceptual design of this system (50 K -60 K) for flexible cryostat based HTS application is presented in this paper. The major components, their design drivers and schematic of setup are described in this paper.