Thermal Performances of Radiative and Convective Plate-Fins with Mutual Irradiation

Abstract

In using radiative and convective fins on heat exchangers, space radiators or nuclear fuel elements for heat release at high temperature, there are cases when the surface of the fins emits radiative and convective energy with mutual irradiation. Most of analyses studied thus far have been carried out for an isolated fin and have neglected the mutual irradiation. In this paper, thermal performances of radiative and convective plate-fins are systematically analysed on the basis of a derived steady-state integro-differential equation. This has been solved for a wide range of values of the normalized parameters. Lastly, the relation between the cases when there is mutual irradiation and when there is not is formulated.