On Modelling of Influence of Air Condition of Building on Gas-Consuming Equipment with an Open Combustion Chamber Functioning

International Multi-Conference on Industrial Engineering and Modern technologies

Sargsyan, S.V.^1 ; Jila, V.A.^1

Scientific and Educational Center of Heat and Gas Supply and Ventilation (NOTs TGV), FGBOU VO NIU MGSU, Yaroslavskoye shosse, 26, Moscow

129337, Russia^1

关键词: Automation devices;    Combustion pro-cess;    Combustion products;    Flame propagation;    Infiltration process;    Natural ventilation;    Nominal operations;    Reliable operation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/463/3/032001/pdf
DOI  :  10.1088/1757-899X/463/3/032001

来源: IOP

【 摘 要 】

Nominal operation of gas consuming equipment with an open combustion chamber installed in the various purposes buildings' premises depends on the receipt of the required amount of air to ensure the complete combustion process. The supply of primary air in an amount of 40-60% of the theoretically required volume allows a stable process of gas combustion. In this case, flame separation is prevented. Requirements for safe operation of the gas consumption system are satisfied. For reliable operation of the gas distribution system, it is necessary to provide installation of the automation devices that respond to any deviations in gas burners. In the process of gas fuel burning, two cones are formed. The internal cone in which the gas burnt is provided by the primary air. In the outer cone of the flame gas is burnt due to air coming from the room. In the lower part of the burner, conditions are created under which the velocity of the gas-air flow and the normal velocity of flame propagation are ensured. This ensures the creation of an incendiary belt, which constantly ignites the air-gas mixture, and provides a stable and constant combustion of gas. The inflow of air into the room where the gas consuming equipment is located is through the filling of light holes during infiltration. Increasing the resistance to air permeation of filling the light apertures is performed to improve the energy efficiency of the building by means of reducing infiltration heat loss. Reduction of natural inflow through constructive non-densities in the fillings of the light apertures leads to a decrease in the infiltration process, and, consequently, to the violation of the process of the nominal functioning of the gas consuming equipment. The possibility of creating an air regulation mechanism for individual rooms and the building is considered, ensuring the influx of the required amount of air, depending on the parameters of the outside air, the air permeability of the fillings of the light apertures, and also the height of their location. Analytical dependencies that consider the effect of the air condition of buildings for various purposes on the joint operation of natural ventilation systems with an unorganized inflow in the required volume, excluding the formation of the effect of reverse thrust in the combustion products removal system are presented.