MATHEMATICAL MODELING OF HEAT EXCHANGE PROCESSES IN THE UNDERGROUND THERMAL ACCUMULATOR
Abstract
The article presents the thermal technical calculation of the underground heat accumulator, which is used to prevent a sharp increase in air temperature in hothouses on sunny days and accumulate solar energy. The coefficient of heat transfer by air-pipe and pipe-soil boundary layers between 20-35 0C of the air-driven to the heat accumulator with the help of a ventilator was calculated in the analytical method. The mathematical model of the change in the time and length of the temperature during the movement of hot air through the pipe is developed (based on boundary conditions). By applying a submerged heat accumulator of hot air, it is possible to accumulate heat 3 - 4,5 MJ, depending on the speed of movement of air on sunny days.
References
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