Radiation heat transfer in the combustion chambers of power plants and environmentally friendly production of thermal energy

The results of experimental studies of the radiation characteristics of the optically active ingredients of the combustion products of energy fuels and their application in problems of radiation heat exchange in the combustion chambers of energy units are considered. The parametrization of the spectral transmittance function of the gas ingredients of the combustion products was carried out according to the results of experimental studies in the temperature range 300- 2500 K using the two-parameter equivalent mass method in structurally inhomogeneous media. Measurements of the microstructure of the black sol in different conditions were carried out on the flame measuring complexes. Shown lower soot formation at higher temperatures. The designs of multi-chamber furnaces of power units that provide the technologically most clean generation of heat energy are proposed. The method of calculating the radiative heat exchange in multi-chamber furnaces is discussed using the terration procedure for calculating the rate of radiation cooling of combustion products in order to establish the temperature distribution in its volume in the stationary mode of operation of the combustion chamber. The distribution of radiation fluxes over the heat-receiving surfaces of the combustion chamber is calculated from the gas and dispersed phase components of the combustion products using the two-parameter equivalent mass method for calculating the spectral transmission function of gas ingredients, effective absorption and scattering cross sections and scattering indications for calculating the effect of diffuse radiation by soot black. The closure of the radiation balance between the change in the enthalpy of combustion products and the heat absorption of heat-receiving surfaces in multi-chamber furnaces is performed with an error of ± 0.5%.