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Heat transfer through powder-filled vapour into liquid-nitrogen cryostat.

Author(s) : CHANG H. M., KIM D. H., KIM H. M., et al.

Summary

An experiment is performed to measure the heat transfer through a powder-filled vapour space above subcooled liquid nitrogen. This study is part of the authors' ongoing efforts to develop the cryogenic technology for HTS power applications, where liquid nitrogen needs to be subcooled by a cryocooler and helium is used as non-condensable gas to compress the liquid. A liquid-nitrogen container is placed in the vapour space of a cryostat and is subcooled by a GM cryocooler. The heat leak to the liquid is measured in steady state with or without powder insulation in the vapour space. The results show that the commercially available glass bubbles are effective in reducing the heat leak through the nitrogen-helium gas mixture.

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Pages: 2006-3/ICEC III-C8

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Details

  • Original title: Heat transfer through powder-filled vapour into liquid-nitrogen cryostat.
  • Record ID : 2008-1091
  • Languages: English
  • Source: Multiconference CryoPrague 2006 (9th Cryogenics 2006, ICEC 21, ICMC'06)
  • Publication date: 2006/07/17

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