한국초전도ㆍ저온공학회논문지 (Progress in Superconductivity and Cryogenics)
- 제7권3호
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- Pages.39-42
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- 2005
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- 1229-3008(pISSN)
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- 2287-6251(eISSN)
적층단열재의 열침입량 측정
Measurement of Heat Leak through Multi-Layer Insulation
- 김동락 (한국기초과학지원연구원) ;
- 양형석 (한국기초과학지원연구원) ;
- 정원묵 (충남대학교 기계설계학과) ;
- 이병섭 (한국기초과학지원연구원) ;
- 신필권 (한국기초과학지원연구원) ;
- 황시돌 (한국전력연구원)
- Kim D. L. ;
- Yang H. S. ;
- Jung W. M. ;
- Lee B. S. ;
- Shin P. K. ;
- Hwang S. D.
- 발행 : 2005.09.01
초록
In this paper, the thermal characteristics of multilayer insulation (MLI) were experimentally investigated by using boil-off calorimetry method for seeking optimum standards of thermal insulation conditions. It is necessary to design the thermal insulating efficiency for applying to cryogenic instruments such as HTS power cable system. It is well known that the thermal characteristics and heat transfer of MLI are greatly affected by various MLI structures such as the number of layers and layer density, etc. However, it is difficult to know the thermal characteristics of MLI correctly. The heat leak by MLI between room temperature and liquid nitrogen temperature was measured at various conditions using a cylindrical cryostat. The cryostat consists of two guard vessels located at both end sides and a test vessel between them. The guard vessels are also filled with liquid nitrogen to prevent radiation heat leak through the both end side of the cylindrical test vessel to measure the heat leak only through MLI.