Performance-based Fire Protection Design Of A Large Space Warehouse

The large warehouse-type buildings are sprouting up across the country in recent years,existed the great fire danger.In this paper,we will see a typical large storage warehouse as the research object,use the combined method of physical fire experiments and numerical simulation,through a comparative analysis of the experimental results and simulation results to study fire smoke flow and natural smoke effect of the large warehouse-type building,and to verify reasonable and accuracy.of the numerical simulation.Research priorities include:the temperature of flue gas,smoke spread speed,visibility and the concentration of CO.The results show that:compared with natural smoke and non-smoke,the relevant temperature is slowed down,the spread speed of smoke and visibility increased,CO concentration decreases;natural smoke's effect strengthens with the increase of the smoke extraction areas increased,weakens with the environmental wind speed increased;the change of storage's high degree can slow down the rate of decline of the flue gas,reducing the radiation strength of the flue gas to the earth of warehouse,but the impact of CO concentration and visibility is not big.To sum up:when there is the fire,the top of the large space warehouse-type buildings have played a very good role in smoke accumulation,compared to non-smoke,the environment inside the warehouse after natural somke carried out greatly improved,because flue gas quickly has flowed through the smoke vent to the outside of the warehouse;for these type of buildings,when fire source is larger,the difference of temperature is larger between inside and outside,no wind influence,natural smoke is a very effective way,but natural somke is more susceptible of outside influence,it is necessary to give full consideration to the outdoor environment;numerical simulation exists some error,for between simulation results and experimental results exists still some error,the reason of error is that:the division of the calculating grid is not very suitable,or the settings of simulation parameters are not reasonable in the simulation of the process.