Heat exchangers between body and environment.

Abstract

The human body exchanges heat with its environment via radiation, convection, conduction and evaporation. Each of the heat exchange terms in the heat balance equation S = M-E-(+/- W)-C-R has been described in further detail as related to environmental conditions and to the effect of clothing. Such factors as air velocity, mean radiant temperature, water vapor pressure in the air and thermal insulation and vapor permeability of clothing are factors which are considered. For dynamic conditions, or for conditions requiring consideration of specific areas of the body, the use of a dynamic mathematical model is recommended.