GREENHOUSE WITH SOIL HEATING BY SOLAR ENERGY Russian patent published in 2023 - IPC A01G9/24 

FIELD: greenhouse.

SUBSTANCE: greenhouse with soil heating by solar energy contains a light-permeable transparent dome, a heat accumulator in the form of a tank for a coolant fluid installed inside the greenhouse and equipped with an electric heater, a heat exchanger consisting of a heat-accumulating material with thermal circuits located under a concrete base on which ridges with soil are located, temperature sensors connected to an automatic controller and installed in thermal circuits, and a pump that circulates the coolant fluid. The heat exchanger of the greenhouse is divided into sections and isolated from the external soil by a heat-insulating material, while in each section the thermal circuits are arranged in a parabolic spiral described by the equation

,

where is the radius of the circumscribed circle of the ridge of the greenhouse section, m; – the polar angle, rad, while the temperature sensors are adjusted to a given temperature of the coolant fluid, determined from the expression

,

where is the temperature of the coolant fluid, ; - the heat flux density, ; – the thermal conductivity coefficient of the material layer, ; – the thickness of the material layer, ; – the temperature of the surface layer of the soil, .

EFFECT: use of the invention will increase the efficiency of the year-round operation of the greenhouse by increasing the number of vegetation periods of plants through guaranteed heating of the soil with insufficient insolation or negative ambient temperatures.

1 cl, 2 dwg