The effects of the solar radiant flux density on the properties of pyroceramic materials

Modeling of Materials Heating on Solar Furnace and Cooling of Melt

“…The complete equation of the heating process is written in the form (1) where α is the coefficient of proportionality, called the heat transfer coefficient, W/(m 2 K); c -specific heat W/kgK; ρ is the density of g/ cm 3 ; d is the thickness of the layer, m; T s is the surface temperature of the body and T0 is the ambient temperature, K; ε is the degree of blackness, T 0 is the Stefan-Boltzmann constant, E is the flux density of concentrated solar radiation in units (W/m 2 ); R is the reflection coefficient of the heated material.…”

“…In this aspect, one of the main technological factors determining the quality of the melt is the rate of heating of the substance to the melting point and higher, as well as the cooling rate of the melt. The use of solar technology allows hundreds of times to increase the heating rate and obtain a structure from clusters of a certain composition, applying fast (103 deg / s) and superfast (104 deg / s) quenching methods [1][2][3][4][5][6]. Thus, modeling of heating and cooling of materials under the influence of concentrated solar radiation is of scientific and practical interest.…”