Experimental results of ITER cold circulators towards the performance demonstration

26th International Cryogenic Engineering Conference & International Cryogenic Materials Conference 2016

材料科学;物理学

Bhattacharya, R.^1 ; Vaghela, H.^1 ; Sarkar, B.^1 ; Patel, P.^1 ; Das, J.^1 ; Srinivasa, M.^1 ; Isono, T.^2 ; Kawano, K.^2

ITER-India, Institute for Plasma Research, Near Indira Bridge, Bhat, Gandhinagar

382428, India^1

Japan Atomic Energy Agency, Naka-shi, Ibaraki-ken

311-0193, Japan^2

关键词: Cryogenic test facility;    Distribution systems;    Experimental validations;    Isentropic efficiency;    Nominal operations;    Operating condition;    Performance demonstration;    System-level requirements;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/171/1/012058/pdf
DOI  :  10.1088/1757-899X/171/1/012058

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The cold circulators, the most challenging component of ITER cryo-distribution system, have been designed, manufactured and tested successfully at factory. The design point for the cold circulator has been specified as 2.21 kg/s at 4.3 K inlet temperature having 0.155 MPa pressure head, dedicated for the nominal operation of toroidal field (TF) superconducting magnet of ITER. The expected isentropic efficiency has been defined as 70 % or more suitable to cater the demands of the cryo-distribution system. Two cold circulators for TF superconducting magnet have been installed in the Test Auxiliary Cold Box (TACB) followed by the integration of TACB system with the 5.0 kW at 4.5 K class cryogenic test facility at Japan. Final cold acceptance test of the complete system has been performed in order to validate the design conditions of TACB and cold circulators. Qualification tests of two cold circulators have been executed at closed loop operating condition. The cool-down of cold circulators down to 4.6 K temperature level and normal operating results as well as the experimental validation of performance along with the obtained isentropic efficiencies at the operating conditions have been demonstrated meeting the system level requirements of ITER cryo-distribution.