Calculation method of the lower height of the smoke layer, the elapsed time of a calculation method for fire until the lower height of the smoke layer reaches a predetermined height, evaluation method of evacuation safety performance of In case of fire in the building, these calculation methods or program and calculation system to perform the evaluation method

摘要

PROBLEM TO BE SOLVED: To provide a method, etc., for calculating the lower end height of a smoke layer, by which calculation is easily performed with high prediction precision with respect to a room of a building provided with smoke exhaustion equipment.;SOLUTION: The method is for calculating the lower end height Z [m] of the smoke layer formed by the smoke of the fire when a fire occurs in the room of the building with provided the smoke exhaustion equipment. The lower end height Z [m] of the smoke layer is calculated through the use of a formula where A_f [m²] is the floor area of the room, H_f [m] is the ceiling height of the room, [kW/s²] is the fire growth rate of the fire, _s [kg/m³] is the density of the smoke layer, C_m [kg/kJ^1/3/m^5/3/s^2/3] is a smoke generation coefficient concerning the generation of the smoke in the fire, C_sm [kg/kJ^1/3/m^5/3/s^2/3] is a smoke exhaustion coefficient concerning the smoke exhaustion from the room by the smoke exhaustion equipment, t [s] is the elapsed time from the fire occurrence, and t_sm [s] is the smoke exhaustion start time to be required from the fire occurrence to the smoke exhaustion start.;COPYRIGHT: (C)2010,JPO&INPIT