Optical Properties and Radiative Heat Transport in Polyester Fiber Insulation

  • N. L. McKay
  • T. Timusk
  • B. Farnaworth


We present calculations of combined radiative and conductive heat flow in two types of polyester fiber insulation. The radiative transport was represented by both a diffusion model and a two-flux model, and the results compared. Optical parameters in both cases were derived from realistic scattering calculations using the frequency-dependent complex refractive index of polyester and the measured fiber diameter. We found that anisotropy in the scattering must be included in the model to obtain accurate results. Model calculations agreed very well with direct measurements of thermal resistance for samples of several thicknesses, with no adjustable parameters in the theory.


Thermal Resistance Diffusion Model Mylar Film Radiative Conductivity Conductive Heat Flow 
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  1. [1]
    Verschoor, J.D. and Greebler, P., Trans. ASME 74 961 (1952)Google Scholar
  2. [2]
    Bankvall, C., J. Test, and Eval. 1 235 (1973)CrossRefGoogle Scholar
  3. [3]
    Davis, L.B. and Birkebak, R.C., Biophys. J. 14 249 (1974)CrossRefGoogle Scholar
  4. [4]
    Farnworth, B., Crow, R.M., and Dewar, M.M., DREO report #818, DREO, Ottawa, 1979Google Scholar
  5. [5]
    Farnworth, B., Textile Research J. 53 715–725 (1983).CrossRefGoogle Scholar
  6. [6]
    Cabannes, F., Maurau, J-C, Hyrien, M., and Klarsfeld, S.M., High Temperatures — High Pressures 11 429 (1979)Google Scholar
  7. [7]
    Timmermans, G., Van Paemel, O., and Myncke, H., XV Int. Conf. on Refrigeration, Venice, Sept. 1979Google Scholar
  8. [8]
    Hager, N.E., and Steere, R.C., J. Appl. Phys. 38 4663 (1967)CrossRefGoogle Scholar
  9. [9] Bhattacharyya, R.K., in Thermal Insulation Performance, (ASTM STP 718)
    edited by D.L. McElroy and R.P. Tye, ASTM, 1980, pp. 272–286Google Scholar
  10. [10]
    Pomraning, G.C., The Equations of Radiation Hydrodynamics, Pergamon Press, Oxford, 1973Google Scholar
  11. [11]
    Modest, M.F., and Azad, F.H., J. Heat Transfer 102 92 (1980)CrossRefGoogle Scholar
  12. [12]
    McKay, N., Timusk, T., and Farnworth, B., J. Appl. Phys. (to be published in June 1984 )Google Scholar
  13. [13]
    Wait, J.R., Can. J. Phys. 33 189 (1955)CrossRefGoogle Scholar
  14. [14]
    Hefflinger, C.J., and Knox, K.L., in The Science and Technology of Polymer Films, edited by O.J. Sweeting, John Wiley & Sons, New York, 1971, pp. 587–639Google Scholar
  15. [15]
    Steere, R.C., J. Appl. Phys. 37 3338 (1966)CrossRefGoogle Scholar

Copyright information

© Purdue Research Foundation 1985

Authors and Affiliations

  • N. L. McKay
    • 1
  • T. Timusk
    • 1
  • B. Farnaworth
    • 2
  1. 1.McMaster UniversityHamiltonCanada
  2. 2.Defense Research EstablishmentOttawaCanada

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