Dynamic simulation of 10 kW Brayton cryocooler for HTS cable

Chang, Ho-Myung; Park, Chan Woo; Yang, Hyung Suk; Hwang, Si Dole

doi:10.1063/1.4860922

Title: Dynamic simulation of 10 kW Brayton cryocooler for HTS cable

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Abstract

Dynamic simulation of a Brayton cryocooler is presented as a partial effort of a Korean governmental project to develop 1∼3 km HTS cable systems at transmission level in Jeju Island. Thermodynamic design of a 10 kW Brayton cryocooler was completed, and a prototype construction is underway with a basis of steady-state operation. This study is the next step to investigate the transient behavior of cryocooler for two purposes. The first is to simulate and design the cool-down process after scheduled or unscheduled stoppage. The second is to predict the transient behavior following the variation of external conditions such as cryogenic load or outdoor temperature. The detailed specifications of key components, including plate-fin heat exchangers and cryogenic turbo-expanders are incorporated into a commercial software (Aspen HYSYS) to estimate the temporal change of temperature and flow rate over the cryocooler. An initial cool-down scenario and some examples on daily variation of cryocooler are presented and discussed, aiming at stable control schemes of a long cable system.

Authors:

Chang, Ho-Myung; Park, Chan Woo ^[1]; Yang, Hyung Suk; Hwang, Si Dole ^[2]

Hong Ik University, Department of Mechanical Engineering, Seoul, 121-791 (Korea, Republic of)
KEPCO Research Institute, Daejeon, 305-760 (Korea, Republic of)

Publication Date:: Wed Jan 29 00:00:00 EST 2014

OSTI Identifier:: 22262760

Resource Type:: Journal Article

Journal Name:: AIP Conference Proceedings

Additional Journal Information:: Journal Volume: 1573; Journal Issue: 1; Conference: Cryogenic engineering conference, Anchorage, AK (United States), 17-21 Jun 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CONTROL; COOLING SYSTEMS; DESIGN; HEAT EXCHANGERS; HIGH-TC SUPERCONDUCTORS; SIMULATION; STEADY-STATE CONDITIONS; TRANSIENTS

Citation Formats


                    Chang, Ho-Myung, Park, Chan Woo, Yang, Hyung Suk, and Hwang, Si Dole. Dynamic simulation of 10 kW Brayton cryocooler for HTS cable.  United States: N. p., 2014. 
        Web.  doi:10.1063/1.4860922.

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                    Chang, Ho-Myung, Park, Chan Woo, Yang, Hyung Suk, & Hwang, Si Dole. Dynamic simulation of 10 kW Brayton cryocooler for HTS cable.  United States.  https://doi.org/10.1063/1.4860922

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                    Chang, Ho-Myung, Park, Chan Woo, Yang, Hyung Suk, and Hwang, Si Dole. 2014.  
        "Dynamic simulation of 10 kW Brayton cryocooler for HTS cable".  United States.  https://doi.org/10.1063/1.4860922.

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@article{osti_22262760,

  title        = {Dynamic simulation of 10 kW Brayton cryocooler for HTS cable},

  author       = {Chang, Ho-Myung and Park, Chan Woo and Yang, Hyung Suk and Hwang, Si Dole},

  abstractNote = {Dynamic simulation of a Brayton cryocooler is presented as a partial effort of a Korean governmental project to develop 1∼3 km HTS cable systems at transmission level in Jeju Island. Thermodynamic design of a 10 kW Brayton cryocooler was completed, and a prototype construction is underway with a basis of steady-state operation. This study is the next step to investigate the transient behavior of cryocooler for two purposes. The first is to simulate and design the cool-down process after scheduled or unscheduled stoppage. The second is to predict the transient behavior following the variation of external conditions such as cryogenic load or outdoor temperature. The detailed specifications of key components, including plate-fin heat exchangers and cryogenic turbo-expanders are incorporated into a commercial software (Aspen HYSYS) to estimate the temporal change of temperature and flow rate over the cryocooler. An initial cool-down scenario and some examples on daily variation of cryocooler are presented and discussed, aiming at stable control schemes of a long cable system.},

  doi          = {10.1063/1.4860922},

  url          = {https://www.osti.gov/biblio/22262760},
  journal      = {AIP Conference Proceedings},

  issn         = {0094-243X},

  number       = 1,

  volume       = 1573,

  place        = {United States},

  year         = {Wed Jan 29 00:00:00 EST 2014},

  month        = {Wed Jan 29 00:00:00 EST 2014}

}

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