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The thermal conductivity of flexible polyurethane foams at low temperature.

Author(s) : ZHANG J., JI Y., WANG Y.

Summary

The thermal transfer mechanism of flexible polyurethane (PU) foams at low temperature has been discussed. According to the structural model diagram of flexible PU foam, the criterion L of convection can be calculated when parameters and influences are considered at low temperature. The thermal conductivity of the flexible PU foam at low temperature can be calculated, too. In order to compare with the calculated thermal conductivity, the thermal conductivity of the flexible PU foam at low temperature has been tested by means of the double-sample of guarded hot-plate apparatus in steady thermal flow which is usually used to test the thermal conductivity of the rigid PU foam. Finally, the curve between temperature and thermal conductivity at low temperature has been obtained. Furthermore, according to the test, the factors (such as temperature, density, water absorption etc.) which may change or influence the thermal conductivity have been discussed.

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Pages: ICR07-A1-1231

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Details

  • Original title: The thermal conductivity of flexible polyurethane foams at low temperature.
  • Record ID : 2007-2540
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/08/21

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