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Critical radius for radial heat conduction: a necessary criterion but not always sufficient.

Author(s) : KULKARNI M. R.

Type of article: Article

Summary

Use of the critical radius for radial heat conduction in thermal insulation systems has been widely reported in the literature. When it is desirable to increase heat dissipation in these systems, the critical radius can be used in a definitive manner to maximize the heat dissipation. However, if it is desirable to decrease heat gain or heat loss, the critical radius only serves as a necessary condition, but it is not sufficient. To address design issues of such thermal systems, the crossover radius is utilized. The crossover radius is defined as a radius greater than the critical radius such that the heat transfer with the corresponding amount of insulating material is equal to that of the bare thermal system. Both cylindrical and spherical systems are considered.

Details

  • Original title: Critical radius for radial heat conduction: a necessary criterion but not always sufficient.
  • Record ID : 2005-0073
  • Languages: English
  • Source: Applied Thermal Engineering - vol. 24 - n. 7
  • Publication date: 2004/05

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