New Theoretical and Methodological Approaches to the Study of Heat Transfer in Coal Dust Combustion

Evgeniy Toropov, Konstantin Osintsev and Sergei Aliukov
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Evgeniy Toropov: Institute of Engineering and Technology, South Ural State University, Chelyabinsk 454080, Russia
Konstantin Osintsev: Institute of Engineering and Technology, South Ural State University, Chelyabinsk 454080, Russia
Sergei Aliukov: Institute of Engineering and Technology, South Ural State University, Chelyabinsk 454080, Russia

Energies, 2019, vol. 12, issue 1, 1-14

Abstract: The existing theories of heat transfer in combustion chambers of boiler units fail to take into account a number of important factors that affect the reliability of results, and the methodological approaches to optimizing combustion processes can be revised in view of the spatial and temporal parameters of flame. Hence, the research aimed to improve the fundamental theoretical and methodological principles of studying heat transfer in coal dust combustion in the combustion chambers of industrial steam generators. The authors proposed to extend the theory of heat transfer with the mathematical description of particle size distribution of coal dust. In addition, the authors used the developed mathematical model of coal dust combustion based on a continuous curve of the particle size distribution in the ensemble. The mathematical model is consistent with the aeromechanical and thermal characteristics of flame. This work introduced a concept of flame continuum as a continuous medium, where the processes of combustion and heat transfer are studied. To achieve the research aim, in this paper, the methods of combustion chamber zoning, the equations of stationary and non-stationary heat conduction, radiation, and convective heat transfer, were used. These methods were tested on a number of high-temperature units.

Keywords: fuel combustion; coal dust; burning of coal particles; heat transfer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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