IIR document

Thermal conductivity aging of polyurethane foam: model and measurements.


With the substitution of CFC's by other blowing agents there is a need for predicting the thermal conductivity aging of the new insulation foams. The thermal conductivity aging can be described by a diffusion equation for each gas or vapour taking part. Also the permeation of the applied facing of the foam plays a significant role. Diffusion coefficients for the different gases can be obtained by measuring in a piece of foam with simple configuration, with a gas chromatograph. Partially these measurements can be replaced and accelerated by sorption experiments on milled foam. With the authors' sorption apparatus it is also possible to determine the permeation of homogeneous facings. Some results are given.

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  • Original title: Thermal conductivity aging of polyurethane foam: model and measurements.
  • Record ID : 1996-0810
  • Languages: English
  • Source: For a Better Quality of Life. 19th International Congress of Refrigeration.
  • Publication date: 1995/08/20
  • Document available for consultation in the library of the IIR headquarters only.


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