Heat Transfer Through Moist Porous Media
A transient technique has been used to measure the effective thermal conductivity of polyurethane foam containing various amounts of water. In this three-phase porous material, it was observed that the conductivity increases with water content, but not linearly. A model of heat and mass transfer based on (1) conduction, (2) infra-red radiation, and (3) the process of evaporation of water, diffusion of water vapour through the structure and condensation both in the structure and externally has been developed to predict the effective thermal conductivity in this material.
KeywordsHeat Transfer Heat Flux Heat Flow Heat Sink Polyurethane Foam
Unable to display preview. Download preview PDF.
- 1.A.M. Schneider, B.N. Hoschke, and H.J. Goldsmid, Measurements of thermal conductivity of textile fabrics, Paper presented at The 19th International Thermal Conductivity Conference, Tennessee Technological University, Cookeville, Tennessee 38505, U.S.A., October 20–23, (1985).Google Scholar
- 2.W.J. Roff, and J.R. Scott, Fibres, films, plastics and rubbers, Butterworth, London, (1971).Google Scholar
- 3.A.M. Schneider, Heat transfer through moist fabrics, PhD thesis, School of Physics, The University of New South Wales, (1987).Google Scholar
- 4.I.M. Stuart, and B.V. Holcombe, Heat transfer through fiber beds by5. B.V. Holcombe, The influence of infra-red radiation on heat transfer through fibrous assemblies, in preparation.Google Scholar
- 5.B.V. Holcombe, The influence of infra-red radiation on heat transfer through fibrous assemblies, in preparation.Google Scholar
- 6.B.V. Holcombe, and I.M. Stuart, Method of numerical solution of equations describing heat transfer in fibrous beds., J. Therm. Insul. 7: 214 (1984).Google Scholar
- 7.A.M. Schneider, B.N. Hoschke, and H.J. Goldsmid, Heat transfer through moist fabrics, in preparation.Google Scholar
- 8.J. Schuhmeister, Ber. K. Akad. Wiss., Wien. Math.- Naturwiss. Klasse, 76: 283 (1877).Google Scholar