Thermal conductivity of semitransparent materials
Conference
·
OSTI ID:5227202
The three-region approximate solution for coupled conductive and radiative heat transfer and an exact solution for uncoupled conductive and radiative heat transfer in a grey semitransparent medium bounded by infinite parallel isothermal plates are employed to establish the dependence of the apparent thermal conductivity of semitransparent materials on other material properties and boundary conditions. An application of the analyses which uses apparent thermal conductivity versus density data to predict the dependence of apparent thermal conductivity on temperature is demonstrated. The predictions for seven sets of R-11 fiberglass and rock wool insulations agree with published measured values to within the limits of experimental error (+- 3%). Agreement for three sets of R-19 fiberglass insulations was, however, not good.
- Research Organization:
- Oak Ridge National Lab., TN (USA); Kentucky Univ., Lexington (USA). Dept. of Metallurgical Engineering and Materials Science; Tennessee Univ., Knoxville (USA). Dept. of Chemical, Metallurgical and Polymer Engineering; Tennessee Technological Univ., Cookeville (USA). Dept. of Chemical Engineering
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5227202
- Report Number(s):
- CONF-8106198-3; ON: DE82017459
- Country of Publication:
- United States
- Language:
- English
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