Influence of material of compartment on fire temperature

Abstract

In performance based code of fire resistance of architectural members, Fire Temperature Rise Coefficient, which is based on heat release by combusion in fire room, opening size, internal surface area of compartment and thermal intertia of compartment materials, is used as for the index of rate of fire tempareture rise. In this method, the thermal inertia of compartment materials is equal to the product of thermal conductivity, density and heat capacity of the materials. But in case of gypsum board and wooden based board, heat absorption onto walls (including ceiling and floor) is accerated by the latent heat due to water evaporation or pyrolysis. Therefore, a series of laboratory scale compartment fire expriment was carried out to estimate the apparent thermal inertia including latent heat of evaporation or pyrolysis from the collected data of fire temperature in each case.