Dynamic Simulation of a Helium Liquefier

R. Maekawa; K. Ooba; M. Nobutoki; T. Mito

doi:10.1063/1.1774682

Dynamic Simulation of a Helium Liquefier

R. Maekawa, K. Ooba, M. Nobutoki, T. Mito

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

6 Scopus citations

Abstract

Dynamic behavior of a helium liquefier has been studied in detail with a Cryogenic Process REal-time SimulaTor (C-PREST) at the National Institute for Fusion Science (NIFS). The C-PREST is being developed to integrate large-scale helium cryogenic plant design, operation and maintenance for optimum process establishment. As a first step of simulations of cooldown to 4.5 K with the helium liquefier model is conducted, which provides a plant-process validation platform. The helium liquefier consists of seven heat exchangers, a liquid-nitrogen (LN₂) precooler, two expansion turbines and a liquid-helium (LHe) reservoir. Process simulations are fulfilled with sequence programs, which were implemented with C-PREST based on an existing liquefier operation. The interactions of a IT valve, a JT-bypass valve and a reservoir-return valve have been dynamically simulated. The paper discusses various aspects of refrigeration process simulation, including its difficulties such as a balance between complexity of the adopted models and CPU time.

Original language	English
Title of host publication	Advances in Cryogenic Engineering
Subtitle of host publication	Transactions of the Cryogenic Engineering Conference - CEC
Editors	John Pfotenhauer, Steven Van Sciver, Albert Zeller, Jonathan Demko, Christopher Rey, John G. Weisend II, John Barclay, Michael DiPirro, Quan-Sheng Shu, Peter Kittel, Edward Daly, John R. Hull, Jennifer Lock, Joseph Waynert, Susan Breon, James Maddocks, John Zbasnik, Patrick J. Kelley, Arkadiy Klebaner
Publisher	American Institute of Physics Inc.
Pages	192-199
Number of pages	8
ISBN (Electronic)	0735401861
DOIs	https://doi.org/10.1063/1.1774682
State	Published - Jun 23 2004
Externally published	Yes
Event	2003 Cryogenic Engineering Conference, CEC 2003 - Anchorage, United States Duration: Sep 22 2003 → Sep 26 2003

Publication series

Name	AIP Conference Proceedings
Volume	710
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	2003 Cryogenic Engineering Conference, CEC 2003
Country/Territory	United States
City	Anchorage
Period	09/22/03 → 09/26/03

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

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10.1063/1.1774682

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Maekawa, R., Ooba, K., Nobutoki, M., & Mito, T. (2004). Dynamic Simulation of a Helium Liquefier. In J. Pfotenhauer, S. Van Sciver, A. Zeller, J. Demko, C. Rey, J. G. Weisend II, J. Barclay, M. DiPirro, Q.-S. Shu, P. Kittel, E. Daly, J. R. Hull, J. Lock, J. Waynert, S. Breon, J. Maddocks, J. Zbasnik, P. J. Kelley, & A. Klebaner (Eds.), Advances in Cryogenic Engineering: Transactions of the Cryogenic Engineering Conference - CEC (pp. 192-199). (AIP Conference Proceedings; Vol. 710). American Institute of Physics Inc.. https://doi.org/10.1063/1.1774682

Maekawa, R. ; Ooba, K. ; Nobutoki, M. et al. / Dynamic Simulation of a Helium Liquefier. Advances in Cryogenic Engineering: Transactions of the Cryogenic Engineering Conference - CEC. editor / John Pfotenhauer ; Steven Van Sciver ; Albert Zeller ; Jonathan Demko ; Christopher Rey ; John G. Weisend II ; John Barclay ; Michael DiPirro ; Quan-Sheng Shu ; Peter Kittel ; Edward Daly ; John R. Hull ; Jennifer Lock ; Joseph Waynert ; Susan Breon ; James Maddocks ; John Zbasnik ; Patrick J. Kelley ; Arkadiy Klebaner. American Institute of Physics Inc., 2004. pp. 192-199 (AIP Conference Proceedings).

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title = "Dynamic Simulation of a Helium Liquefier",

abstract = "Dynamic behavior of a helium liquefier has been studied in detail with a Cryogenic Process REal-time SimulaTor (C-PREST) at the National Institute for Fusion Science (NIFS). The C-PREST is being developed to integrate large-scale helium cryogenic plant design, operation and maintenance for optimum process establishment. As a first step of simulations of cooldown to 4.5 K with the helium liquefier model is conducted, which provides a plant-process validation platform. The helium liquefier consists of seven heat exchangers, a liquid-nitrogen (LN2) precooler, two expansion turbines and a liquid-helium (LHe) reservoir. Process simulations are fulfilled with sequence programs, which were implemented with C-PREST based on an existing liquefier operation. The interactions of a IT valve, a JT-bypass valve and a reservoir-return valve have been dynamically simulated. The paper discusses various aspects of refrigeration process simulation, including its difficulties such as a balance between complexity of the adopted models and CPU time.",

author = "R. Maekawa and K. Ooba and M. Nobutoki and T. Mito",

note = "Publisher Copyright: {\textcopyright} 2004 American Institute of Physics.; 2003 Cryogenic Engineering Conference, CEC 2003 ; Conference date: 22-09-2003 Through 26-09-2003",

year = "2004",

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doi = "10.1063/1.1774682",

language = "English",

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publisher = "American Institute of Physics Inc.",

pages = "192--199",

editor = "John Pfotenhauer and {Van Sciver}, Steven and Albert Zeller and Jonathan Demko and Christopher Rey and {Weisend II}, {John G.} and John Barclay and Michael DiPirro and Quan-Sheng Shu and Peter Kittel and Edward Daly and Hull, {John R.} and Jennifer Lock and Joseph Waynert and Susan Breon and James Maddocks and John Zbasnik and Kelley, {Patrick J.} and Arkadiy Klebaner",

booktitle = "Advances in Cryogenic Engineering",

}

Maekawa, R, Ooba, K, Nobutoki, M & Mito, T 2004, Dynamic Simulation of a Helium Liquefier. in J Pfotenhauer, S Van Sciver, A Zeller, J Demko, C Rey, JG Weisend II, J Barclay, M DiPirro, Q-S Shu, P Kittel, E Daly, JR Hull, J Lock, J Waynert, S Breon, J Maddocks, J Zbasnik, PJ Kelley & A Klebaner (eds), Advances in Cryogenic Engineering: Transactions of the Cryogenic Engineering Conference - CEC. AIP Conference Proceedings, vol. 710, American Institute of Physics Inc., pp. 192-199, 2003 Cryogenic Engineering Conference, CEC 2003, Anchorage, United States, 09/22/03. https://doi.org/10.1063/1.1774682

Dynamic Simulation of a Helium Liquefier. / Maekawa, R.; Ooba, K.; Nobutoki, M. et al.
Advances in Cryogenic Engineering: Transactions of the Cryogenic Engineering Conference - CEC. ed. / John Pfotenhauer; Steven Van Sciver; Albert Zeller; Jonathan Demko; Christopher Rey; John G. Weisend II; John Barclay; Michael DiPirro; Quan-Sheng Shu; Peter Kittel; Edward Daly; John R. Hull; Jennifer Lock; Joseph Waynert; Susan Breon; James Maddocks; John Zbasnik; Patrick J. Kelley; Arkadiy Klebaner. American Institute of Physics Inc., 2004. p. 192-199 (AIP Conference Proceedings; Vol. 710).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Dynamic Simulation of a Helium Liquefier

AU - Maekawa, R.

AU - Ooba, K.

AU - Nobutoki, M.

AU - Mito, T.

PY - 2004/6/23

Y1 - 2004/6/23

N2 - Dynamic behavior of a helium liquefier has been studied in detail with a Cryogenic Process REal-time SimulaTor (C-PREST) at the National Institute for Fusion Science (NIFS). The C-PREST is being developed to integrate large-scale helium cryogenic plant design, operation and maintenance for optimum process establishment. As a first step of simulations of cooldown to 4.5 K with the helium liquefier model is conducted, which provides a plant-process validation platform. The helium liquefier consists of seven heat exchangers, a liquid-nitrogen (LN2) precooler, two expansion turbines and a liquid-helium (LHe) reservoir. Process simulations are fulfilled with sequence programs, which were implemented with C-PREST based on an existing liquefier operation. The interactions of a IT valve, a JT-bypass valve and a reservoir-return valve have been dynamically simulated. The paper discusses various aspects of refrigeration process simulation, including its difficulties such as a balance between complexity of the adopted models and CPU time.

AB - Dynamic behavior of a helium liquefier has been studied in detail with a Cryogenic Process REal-time SimulaTor (C-PREST) at the National Institute for Fusion Science (NIFS). The C-PREST is being developed to integrate large-scale helium cryogenic plant design, operation and maintenance for optimum process establishment. As a first step of simulations of cooldown to 4.5 K with the helium liquefier model is conducted, which provides a plant-process validation platform. The helium liquefier consists of seven heat exchangers, a liquid-nitrogen (LN2) precooler, two expansion turbines and a liquid-helium (LHe) reservoir. Process simulations are fulfilled with sequence programs, which were implemented with C-PREST based on an existing liquefier operation. The interactions of a IT valve, a JT-bypass valve and a reservoir-return valve have been dynamically simulated. The paper discusses various aspects of refrigeration process simulation, including its difficulties such as a balance between complexity of the adopted models and CPU time.

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AN - SCOPUS:85011673303

T3 - AIP Conference Proceedings

SP - 192

EP - 199

BT - Advances in Cryogenic Engineering

A2 - Pfotenhauer, John

A2 - Van Sciver, Steven

A2 - Zeller, Albert

A2 - Demko, Jonathan

A2 - Rey, Christopher

A2 - Weisend II, John G.

A2 - Barclay, John

A2 - DiPirro, Michael

A2 - Shu, Quan-Sheng

A2 - Kittel, Peter

A2 - Daly, Edward

A2 - Hull, John R.

A2 - Lock, Jennifer

A2 - Waynert, Joseph

A2 - Breon, Susan

A2 - Maddocks, James

A2 - Zbasnik, John

A2 - Kelley, Patrick J.

A2 - Klebaner, Arkadiy

PB - American Institute of Physics Inc.

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Y2 - 22 September 2003 through 26 September 2003

ER -

Maekawa R, Ooba K, Nobutoki M, Mito T. Dynamic Simulation of a Helium Liquefier. In Pfotenhauer J, Van Sciver S, Zeller A, Demko J, Rey C, Weisend II JG, Barclay J, DiPirro M, Shu QS, Kittel P, Daly E, Hull JR, Lock J, Waynert J, Breon S, Maddocks J, Zbasnik J, Kelley PJ, Klebaner A, editors, Advances in Cryogenic Engineering: Transactions of the Cryogenic Engineering Conference - CEC. American Institute of Physics Inc. 2004. p. 192-199. (AIP Conference Proceedings). doi: 10.1063/1.1774682

Dynamic Simulation of a Helium Liquefier

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