Counter-flow cooling system with gravity-fed circulating liquid nitrogen
IVANOV Yury （中部大）； RADOVINSKY Alexey, ZHUKOVSKY Alexander （MIT）； 佐々木 淳, 山口 作太郎 （中部大）
ivanov*isc.chubu.ac.jp
Abstract:The liquid nitrogen （LN2） is usually used to keep the HTS cable low temperature. The pump is utilized to circulate LN2 inside the cryopipes. However， the pump power is one of heat loads for the cryogenic system， and if it is high， the effectiveness of SC cable system decreases. In order to solve this problem， a thermal siphon can be applied to circulate LN2. Two possible system configurations have been analyzed recently by Radovinsky and Zhukovsky along the basic idea proposed by S. Yamaguchi as the collaboration between Chubu Univ. and MIT. Here， we discuss the effectiveness of thermal siphon with counterflow circulation loop composed of cryogen flow channel and inner cable channel. Such configuration allows us to simplify apparatus significantly， and an actual structure should be found. The performance of this design for short-distance applications is discussed.