The On-Site Status of the Kstar Helium Refrigeration System
Abstract
Since the first design of the KSTAR helium refrigeration system (HRS) in year 2000, many modifications and changes have been applied due to both system optimization and improved knowledge of the KSTAR cold components. The present specification of the HRS had been fixed on March, 2005. Consequent manufacturing of main equipment, such as "Compressor Station" (C/S), "Cold Box" (C/B), and "Distribution Box ♯1" (D/B ♯1) was completed by or under the supervision of Air Liquide DTA by the end of year 2006. The major components of the C/S are 2 low and 2 high pressure compressor units and an oil-removal system. The cooling power of the C/B at 4.5 K equivalent is 9 kW achieved by using 6 turbo-expanders. The D/B ♯1 is a cryostat housing 49 cryogenic valves, 2 supercritical helium circulators, 1 cold compressor, and 7 heat exchangers immersed in a 6 m3 liquid helium storage.
In this proceeding, the on-site installation and commissioning status of the HRS will be presented. In addition, the final specification and design features of the HRS and the- Publication:
-
Advances in Cryogenic Engineering
- Pub Date:
- March 2008
- DOI:
- 10.1063/1.2908582
- Bibcode:
- 2008AIPC..985..437C
- Keywords:
-
- 07.20.Mc;
- 84.30.Qi;
- 67.00.00;
- Cryogenics;
- refrigerators low-temperature detectors and other low-temperature equipment;
- Modulators and demodulators;
- discriminators comparators mixers limiters and compressors;
- Quantum fluids and solids;
- liquid and solid helium