Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference (한국초전도저온공학회:학술대회논문집)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Design of Copper Sheets to Subcool Liquid Nitrogen in HTS Transformer

HTS변압기의 액체질소 과냉을 위한 구리판의 설계

  • ;
  • ;
  • Steven W. Van Sciver
  • 최연석 (미국 Florida 주립대학교, 국립 고자장 연구소) ;
  • 장호명 (미국 Florida 주립대학교, 국립 고자장 연구소) ;
  • Published : 2003.02.01
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Abstract

In our newly proposed cryogenic systems for HTS transformer, liquid nitrogen is subcooled by copper sheets extended from coldhead of cryocooler. Since the shape of copper sheets has been given by the shape of HTS windings and electrical restriction, the thickness of copper sheets is the main parameter to determine operating temperature in HTS windings. Temperature distributions between windings and coldhead are investigated by heat transfer analysis, from which the thickness of copper sheets to maintain every part of windings below 66 K is calculated. The effects of the amount of AC loss on the temperature distributions in cooling system are also presented.

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