Study of the heat transfer between chimney and roof by means of design of experiment (DOE) technique

The topic of this work is that of the wooden roof fires: the passage of a chimney through a thick and insulating wooden roofs could lead to the overheating of these latter. Roof fires involve also tested chimney, whose production and installation are regulated by several standards. The aim of this work is to study the heat transfer between chimney and floor: data here analyzed (floor maximum temperatures) has been obtained by means of simulations performed with the CFD code Fluent and it has been analyzed with the DOE technique, that it is usually used to design experimental campaign, but in this work has been used to quantify and to compare the factors impact on the observed phenomenon. The results of this work is the determination of a mathematical relationship by means of which to calculate the floor maximum temperature on varying floor and chimney characteristics, more precisely the floor thickness, the floor thermal transmittance, the smoke temperature and the distance between the chimney and the floor.