Architecture and Urban Planning. Reconstruction and Refurbishment

Analysis of heat losses in stoves. The real efficiency of the furnace

Vestnik MGSU 11/2018 Volume 13
  • Shevyakov Vladimir V. - Candidate of Technical Sciences, independent researcher; ORCID 0000-0001-5946-2742..

Pages 1296-1304

Introduction. An approach to the development of recommendations on the choice of operating modes of the furnace and of its design parameters is presented. Efficiency of a household stove is a rather broad concept by which the uniform heating of stove surfaces and heat transfer over time, etc. are understood. The ability of the stove to receive heat from burning wood and transfer heat to the room with minimal losses is the technical characteristics, which we will consider. The operation of any furnace is cyclic. Each cycle consists of two parts: the accumulation of heat (the mode of the furnace, the combustion of wood) and the heat transfer to a heated room (the mode of heat release). The furnace furnace mode is characterized by the efficiency of the furnace. Not all the heat left in the furnace is transferred to the room. Part of the heat goes into the foundation and through the valves in the pipe. The estimation of heat losses and the amount of carbon monoxide in a household oven, recommendations for their reduction are given. Materials and methods. A detailed analysis and assessment of heat losses, an estimate of the amount of carbon monoxide in a household oven, and the development of recommendations for their reduction are given. Results. The results of the study and analysis are used to develop ecommendations on the choice of operating modes of the furnace and the choice of its design parameters. Conclusions. The results of the work can be recommended in the development of domestic stoves.

DOI: 10.22227/1997-0935.2018.11.1296-1304

Download

PECULIARITIES OF TESTING HOUSEHOLD FURNACES BY EUROPEAN STANDARD 15250 WITH THE HELP OF GAS ANALYZER AND ANEMOMETER

Vestnik MGSU 6/2018 Volume 13
  • Shevyakov Vladimir Viktorovich - Pensioner Candidate of Technical Sciences, Pensioner, .

Pages 709-716

Subject: The existing testing methods and instruments (gas analyzer) used do not allow us to obtain the real characteristics of household furnaces to the full extent. This is due to the fact that the combustion of firewood in the furnace is a very unstable process and varies over time over a large range. Such an important parameter as the concentration of carbon monoxide in flue gases proves to be significantly underestimated, and the efficiency of the furnace is too high, which does not allow us to reliably estimate the characteristics of the furnaces and compare them. It requires a more detailed analysis of the firewood combustion process itself and the development of recommendations to improve the reliability of experimental results. Research objectives: investigation of available methods of testing household furnaces and development of recommendations for increasing the reliability of experimental results. Materials and methods: A detailed analysis of the combustion of firewood in the PDKSh-2.0 furnace was carried out. Results: The results of the study were used to develop recommendations for selecting a zone for measuring the characteristics of household furnaces and using a gas analyzer in conjunction with an anemometer to increase the accuracy of measurements and test quality. The proposed recommendations make it possible to obtain more real characteristics of firewood combustion in household furnace and significantly reduce the error in measuring concentration of carbon monoxide and also when measuring the efficiency of the furnaces. Conclusions: The results of the work can be recommended for use in the testing of household furnaces.

DOI: 10.22227/1997-0935.2018.6.709-716

Download

Results 1 - 2 of 2