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Modeling of the Processes of Heat and Mass Transfer in the Thin Tube Given the Conditions of Exchange with Surrounding Soil

Mathematical model of heat and mass transfer that couples the heat flow field in the tube with the heat exchange in the surrounding soil was established in this study. It has important applications for the solution of design problems of modern heating systems using renewable energy sources. A mathematical model of the two-dimensional unsteady convection-diffusion process of heat in a heat exchanger tube soil, under conditions of the prevalence of convective its components over diffusive ones has been developed. This let us get the temperature distribution of the coolant along the heat exchanger tubes and within the tube.