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고온초전도 시스템 냉각용 고화질소의 기초 절연 특성 The Basic Insulation Characteristics of Solid-Nitrogen for Cryocooling of HTS Systems

논문 기본 정보

저자정보
(경상대학교) (경상대학교) (고려대학교) (고려대학교) (한국전기연구원) (한국전기연구원) (경상대학교)
저널정보
대한전기학회 전기학회논문지 전기학회논문지 제58권 제1호
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132 - 136 (5page)
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피인용 2

고온초전도 시스템 냉각용 고화질소의 기초 절연 특성
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    초록·키워드

    Recently, for improvement of the magnetic field of high temperature superconductor (HTS) apparatus, many studies investigating on operating in the range of 20 - 65 K with liquid helium or the conducting method using cryocooler are actively reviewed. Also, the cooling method using solid nitrogen as cryogen is being suggested. Since the nitrogen has very large specific heat in solid state, it is expected that it can be operated for a long time without a continuous supply of cooling energy. However, there are still insufficient data on the characteristics of solid nitrogen such as thermodynamic properties and liquid-solid phase change. Especially, there was almost no study done on the electrical insulation properties of solid nitrogen so far. In this study, solid nitrogen to find the electrical characteristics was made by using cryocooler and cryostat, and investigated the flashover discharge and breakdown. The results of this study will be useful as a basic data for electrical insulation design of the HTS system using solid nitrogen as cryogen.

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      UCI(KEPA) : I410-ECN-0101-2010-560-002245698