Dynamic simulation of the helium refrigerator/liquefier for LHD

Ryuji Maekawa; Kouki Ooba; Minoru Nobutoki; Toshiyuki Mito

doi:10.1016/j.cryogenics.2004.10.001

Dynamic simulation of the helium refrigerator/liquefier for LHD

Ryuji Maekawa, Kouki Ooba, Minoru Nobutoki, Toshiyuki Mito

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

A real-time dynamic simulation has been carried out for the 10 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 20 m ³ 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.

Original language	English
Pages (from-to)	199-211
Number of pages	13
Journal	Cryogenics
Volume	45
Issue number	3
DOIs	https://doi.org/10.1016/j.cryogenics.2004.10.001
State	Published - Mar 2005
Externally published	Yes

Keywords

Claude cycle (E)
Dynamic simulation (C)
Fusion magnets (F)
Heat exchangers (E)

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.cryogenics.2004.10.001

Cite this

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title = "Dynamic simulation of the helium refrigerator/liquefier for LHD",

abstract = "A real-time dynamic simulation has been carried out for the 10 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 20 m 3 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.",

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author = "Ryuji Maekawa and Kouki Ooba and Minoru Nobutoki and Toshiyuki Mito",

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T1 - Dynamic simulation of the helium refrigerator/liquefier for LHD

AU - Maekawa, Ryuji

AU - Ooba, Kouki

AU - Nobutoki, Minoru

AU - Mito, Toshiyuki

PY - 2005/3

Y1 - 2005/3

N2 - A real-time dynamic simulation has been carried out for the 10 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 20 m 3 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.

AB - A real-time dynamic simulation has been carried out for the 10 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 20 m 3 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.

KW - Claude cycle (E)

KW - Dynamic simulation (C)

KW - Fusion magnets (F)

KW - Heat exchangers (E)

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DO - 10.1016/j.cryogenics.2004.10.001

M3 - Article

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SN - 0011-2275

VL - 45

SP - 199

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JO - Cryogenics

JF - Cryogenics

IS - 3

ER -

Dynamic simulation of the helium refrigerator/liquefier for LHD

Abstract

Keywords

UN SDGs

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