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CALCULATION OF RADIANT HEAT EXCHANGE IN POWER INSTALLATIONS WITH VORTEX FURNACES

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Author(s): O. A. Sotnikova | D. B. Kladov | N. S. Kobelev

Journal: Scientific Herald of the Voronezh State University of Architecture and Civil Engineering
ISSN 2075-0811

Volume: 4;
Issue: 4;
Start page: 27;
Date: 2011;
Original page

Keywords: boiler | radiant heat exchange | angular coefficient of radiation

ABSTRACT
Problem statement. In recent years, decentralized and individual heat supply systems satisfying existingneeds of population in thermal energy are progressing rapidly. Such systems use steam and water-heating boilers in which vortex method of fuel burning is applied. The method allows to providefor uniform temperature distribution in furnace and prevents heat exchange surface burning-out.Heat exchange by radiation is the principal process in boiler furnaces, and its calculation is an intricateproblem. This paper considers the method of determining the angular coefficients of radiationof a cylindrical source (to which torch can be assigned) on parallel and perpendicular planes.Results and conclusions. Analytical expressions for determining local angular coefficients of a linearsource radiation on an elemental area are obtained at their relative position in parallel andperpendicular planes. The expressions are used in calculation of radiant heat exchange in boilerswith vortex furnaces. The use of such devices will enhance boiler service life and magnify coefficientof efficiency of a boiler due to the reduction of heat losses caused by chemical and mechanicalunderburning and to increase durability of a boiler.
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