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Document IIF

Transfert de chaleur au travers de la superisolation entre les températures ambiantes et cryogéniques.

Heat transfer through superinsulation from ambient to cryogenic temperatures.

Auteurs : HIRSCHL C., KRÁLIK T., LAA C., et al.

Résumé

For more than 30 years thermal measurement results and analytical formulas are available to calculate the heat transfer through superinsulation. According to the temperature dependence of the emissivity for aluminium, the most commonly used material for the reflecting surfaces, derivations based on the Stefan-Boltzmann-law for radiative heat transfer have been established. Together with conductive terms this leads to formulas for the calculation of heat transfer through superinsulation. Using new measurement results of temperature dependent emissivity and conductivity the authors have performed heat flux calculations applying common software tools. The heat transfer through the superinsulation and the temperature distribution inside the superinsulation calculated with this new approach has been compared with the established formulas and measurement results.

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Format PDF

Pages : 2006-3/ICEC III-C8

Disponible

  • Prix public

    20 €

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    Gratuit

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Détails

  • Titre original : Heat transfer through superinsulation from ambient to cryogenic temperatures.
  • Identifiant de la fiche : 2008-1096
  • Langues : Anglais
  • Source : Multiconference CryoPrague 2006 (9th Cryogenics 2006, ICEC 21, ICMC'06)
  • Date d'édition : 17/07/2006

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