Ventilation of factory buildings by natural convection.

Considers a building with an arbitrary number of point and line heat sources at the floor. Fresh air flows in the room through windows, warm air leaves through roof louvres. To model the complicated flow field, the building issubdivided into several regions. Mass, momentum and energy balances are set up for each region. Well-known results are used for turbulent plumes and wall boundary layers due to natural convection. Pressure drops across entrance and exit openings have to be compensated by buoyancy forces. Thus the interface position, the mass flow and the temperature in the discharge air region can be determined. The influence of different parameters is discussed. The interfacehas to be above a certain level to guarantee appropriate working conditions.