Integrated cryogenic fluid flow distribution and cooling scheme with helium liquefier/refrigerator for SST-1 magnet system

Author

Sarkar, B. ; Dhard, C.P. ; Sahu, A.K. ; Gupta, N.C. ; Misra, R. ; Tank, J. ; Panchal, P. ; Tanna, V.L. ; Phadke, G. ; Patel, J.C. ; Saxena, Y.C.

Author_Institution

Inst. of Plasma Res., Gandhinagar, India

Volume

14

Issue

2

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

1700

Lastpage

1703

Abstract

The thermo-hydraulic analysis shows that a total of 300 g/s supercritical helium (SHe) flow is required for the superconducting magnet system (SCMS) of steady state superconducting tokamak, SST-1, including the bus lines to keep sufficient temperature margin of the conductor. The heat received from the SCMS is removed from the circulating SHe through a heat exchanger placed in the main control dewar (MCD). SHe flow distribution among different paths of SCMS has been optimized on the basis of steady state as well as pulsed heat load as per required stability margins of the coils. An integrated flow distribution and control (IFDC) system has been designed, fabricated, installed and tested to control the flow rate in SCMS. The IFDC system has been designed also to take care for safe handling of cryogen following quench in SCMS. The paper describes the cooling scheme of SCMS with the refrigerator/liquefier (R/L) and the role of IFDC system toward all operational modes of SCMS with the R/L.

Keywords

Tokamak devices; cooling; cryogenics; flow control; heat exchangers; liquid helium; quenching (thermal); refrigeration; superconducting coils; superconducting magnets; thermal analysis; IFDC system; SCMS quench; SHe flow distribution; SST-1 magnet system; circulating SHe; coil stability margins; conductor temperature; cooling scheme; cryogen handling; heat exchanger; helium liquefier; helium refrigerator; integrated cryogenic fluid flow distribution; liquid helium; main control dewar; pulsed heat load; steady state superconducting tokamak; superconducting magnet system; supercritical helium; thermohydraulic analysis; Control systems; Cooling; Cryogenics; Fluid flow; Helium; Magnetic analysis; Refrigeration; Steady-state; Superconducting magnets; Tokamaks; Cooling; cryogenics; flow control; liquid helium; magnets;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2004.831044

Filename

1325132