The article develops a mathematical model of the modes of change of the indoor air temperature and the loaded biomass temperature over time on the basis of the equilibrium heat balance equation of the reactor of the heat pipe biogas-biofertilizer. Theoretical and experimental studies of changes in air temperature over time in stationary and non-stationary states inside the reactor of a thermal tubular biogas-biofertilizer. According to the results of the study, when the outside air temperature is 10 °C, it is possible to heat the indoor air temperature to 85-90 °C in accordance with the total solar radiation falling on the transparent surface of the device reactor. It is scientifically based to achieve full coverage of the greenhouse heat load using heated water due to the combustion of biogas obtained anaerobically in a water heating boiler as a result of heating of the biomass inside the device.
The article develops a mathematical model of the heat supply system of the greenhouse complex, taking into account the free heat flow in the animals, solar energy, heat energy stored in heat accumulators and developed through the program MATLAB / Simulink. In the development of a mathematical model of the heat supply system of the greenhouse complex, a block diagram of the equation in the program MATLAB / Simulink was developed, without taking into account the change in air density and specific heat capacity with temperature. According to the graphic results obtained for the daily value of solar radiation 500 W/m2, outside air temperature, -6 °C in Karshi, the air temperature inside the greenhouse rises to 22 °C, water tank battery temperature to 13 °C, underground heat accumulator temperature to 17 °C. can be seen. while the amount of total solar radiation was 300 W/m2, this figure was found to be 14 °C, 9 °C, and 12 °C.
The article presents the results of calculation of heat losses in greenhouses with different coatings, taking into account thermal-physical properties of coatings. In addition, based on the results of changes in external air temperature and solar radiation over time, numerical calculations were made on the heat load of a greenhouse with a useful area of 108 m2 and the thermal power provided by solar energy.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.