Regulation of the Process of Combustion of Wood in a Household Furnace by the Method of Dilution of the Hot Gases of the Furnace Pipe With Room Air

In order to increase the efficiency of a household furnace and reduce the concentration of carbon monoxide at the furnace outlet, it is necessary to optimize the process of wood burning in the furnace. To do this, it is needed to select the regulatory criteria. The most feasible criterion is the temperature at the outlet of the furnace. This is especially true for small-sized furnaces with short flues. Reducing this temperature makes it possible to increase the efficiency of the furnace. The possibilities of regulating the process of wood burning in a household oven are very limited. This is an exit valve and a blow-down door. By reducing their flow section, and, accordingly, increasing the gas-dynamic resistance of these sections, it is possible to increase the total gas-dynamic resistance of the furnace and thereby reduce the intake air flow through the furnace. The method of regulating the process of wood burning by diluting hot gases in the pipe with room air is investigated. Maintaining a constant temperature in the pipe leads to a constant draft in the pipe and, accordingly, to a constant flow of air through the furnace. This required a more detailed analysis and study of the process of gorenje wood in the furnace MPKSH-2.0 and the definition of criteria by which it is necessary to optimize this process. To study the proposed control option, an automatic electric drive with an air flap installed in front of the chimney was developed and manufactured. Two anemometers, a gas analyzer, a digital differential pressure gauge and a digital thermometer were used in the tests. It is shown that the method of regulating the process of wood burning in a household furnace by diluting hot gases of the pipe with room air makes it possible to limit and regulate the temperature in the chimney, but does not make it possible to fully regulate the process of burning wood in the furnace, leads to a slight increase in the efficiency of the furnace and to an increase in the amount of carbon monoxide at the outlet of the furnace. This method is recommended for use in household and bath furnaces to reduce the temperature in the pipe.

V.V. SHEVIAKOV, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

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