| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10637866 | Cryogenics | 2005 | 13 Pages |
Abstract
A real-time dynamic simulation has been carried out for the 10Â kW class helium refrigerator/liquefier of Large Helical Device (LHD) at National Institute for Fusion Science (NIFS). The refrigerator consists of eight screw compressors, seven expansion turbines, fourteen heat exchangers and a 20Â m3 liquid helium reservoir. A simulation model was implemented to Cryogenic Process REal-time SimulaTor (C-PREST), developed as a platform for the plant process study and optimization. Validity of the simulation model has been confirmed based on the design values as well as the results of commissioning tests. This paper describes the cooldown process and expansion turbine trips during the operation. Difficulties of dynamic simulation for the large cryoplant are also discussed.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Ryuji Maekawa, Kouki Ooba, Minoru Nobutoki, Toshiyuki Mito,