ABSTRACT
We begin this chapter with a discussion of the analysis of radiation exchange in an enclosure where all surfaces are black, so that no režections need be considered. Ideal surfaces emit diffusely, so the intensity leaving each surface is independent of direction. For emission from an isothermal surface, the con¢guration factors discussed in Chapter 4 can then be used to calculate how much radiation will reach another surface. The relation for exchange between two surfaces is applied to multiple surfaces, each at a different uniform temperature, in an enclosure of black surfaces.
