- Author
-
Burns, P. J.
- Title
- Thickness Effect in Low-Density Insulation.
- Coporate
- Colorado State Univ., Fort Collins
- Sponsor
- National Bureau of Standards, Washington, DC
Department of Energy, Washington, DC
- Report
-
NBSIR 84-2906
August 1984
- Distribution
- Available from National Technical Information Service
- Contract
- DE-AI01-76PRO6010
- Keywords
-
thermal insulation; thickness; glass fibers; heat transfer
|
thermal conductivity
- Abstract
- A discussion is presented of theory of heat transfer in low-density, glass-fiber insulation via conduction, convection, and radiation. 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 results 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'.