Design and Radiative heat transfer in a fireman in wildfire environment

Abstract

This work presents the heat and mass exchanges in a fireman subjected to forest fire. A fireman thermal response systems is made. The human body model is divided into 35 elements. Each element is subdivided into several layers, constituted by fat, muscle, core and skin, and can be shielded from the outside environment by several clothing layers. In both systems, special attention is required with conduction, convection, evaporation and radiation. There are also considered the heat exchanges by radiation between the fire front and both bodies. A vertical fire front, with 2 m of height and 20 m of length, was considered. The air temperature, air velocity, air relative humidity and mean radiant temperature are used. The results of the flame mean radiant temperature, temperature of the bodies surfaces and view factors are obtained. The fireman has a skin surface temperature controlled by the human thermoregulatory and clothing systems.