Thickness effect in low-density insulation
Abstract
The theory of heat transfer in low density, glass fiber insulation via conduction, convection, and radiation is discussed. It is concluded that the primary modes of heat transfer in this material are air conduction and radiation. An analysis of NBS data of measured apparent thermal conductivity for different thicknesses resulted in a parameter estimate of the optical extinction coefficient. This parameter determines the amount of change in apparent thermal conductivity as a function of sample thickness. This phenomena is referred to as the thickness effect.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- August 1984
- Bibcode:
- 1984STIN...8520273B
- Keywords:
-
- Heat Transfer;
- Thermal Conductivity;
- Thermal Insulation;
- Thickness;
- Algorithms;
- Least Squares Method;
- Parameter Identification;
- Temperature Profiles;
- Fluid Mechanics and Heat Transfer