The study is set to determine room's air exchange scheme's influence on exhaust ventilation appliances' effectiveness. Open-type exhausts (exhaust ventilation hoods) used in different industrial manufacturing processes are selected. In particular, a food processing working space with an adjacent meat heat-treating chamber, where ventilation hood is installed near an open doorway, is evaluated. Two options of supply air ducts' installation (air inflow in the center of a working space or, alternatively, side areas of it) are analysed. Geometrical models of heat-treating chamber, raw material loading room, ventilation hood placed over chamber's door, and supply air duct with air-distributing appliances are constructed. The article presents results of numerical simulation for the model of heat-treating chamber's exhaust ventilation system operation. It is established that, in case of a supply ducts' installation in a side areas of a room, an air exchange could be lowered by 28% under condition of a removal of a gas-air mixture without breaching into the room.

Keywords: exhaust ventilation, ventilation hood, simulation, heat-treatment chamber, numerical experiment