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An experimental study of heat transfer through liquid foam.

Author(s) : SHAMIM T., MCDONALD T. W.

Summary

An experimental investigation was carried out to determine the feasibility of using liquid foam as an insulation medium between the walls of a greenhouse in a hot, arid climate, where it must act both as an insulator and as a translucent medium to attenuate thermal radiation. The results show that the foam is effective in attenuating radiation. A 25-mm layer was found to transmit only 50% of incident solar radiation. In addition, it was found that the "effective" thermal conductivity is independent of the solute concentration, decreases with an increase in the temperature difference, and increases rapidly with an increase in the mean temperature. The results revealed that a vertical annular liquid foam layer measuring 25-mm thick has an "effective" thermal conductivity almost double that of air for a mean temperature of 25 deg C and a temperature difference of 10 deg C.

Details

  • Original title: An experimental study of heat transfer through liquid foam.
  • Record ID : 1996-1535
  • Languages: English
  • Source: ASHRAE Transactions.
  • Publication date: 1995/01
  • Document available for consultation in the library of the IIR headquarters only.

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