Abstract
When growing various crops in greenhouses an important condition for obtaining high yields is compliance with the required parameters of the temperature regime of the air environment. The air conditioning systems currently used in greenhouses of the V generation “Ultra Clima” are equipped with adiabatic panels that cool the air entering the room by evaporation of moisture from their surface. However, in some cases, such systems are not able to support the required values. This is due to the large heat flows entering the greenhouse in the summer. The paper analyzes the temperature balance of the air environment of greenhouses of the V generation, evaluates the main heat flows, determines the operating modes of cooling systems that guarantee sufficient cooling capacity to achieve the required temperatures in the room.
Highlights
Modern semi-closed greenhouses of the V generation, equipped with microclimate adjustment systems, provide ample opportunities for their use in a number of regions of our country
The volume of air supplied to the greenhouse is limited by two factors: the air velocity in the plant placement area, which should be within 0.25 - 0.50 m/s and in rare cases may increase for a short time, but not more than 1m /s, as well as the level of CO2 concentration, which with a large volume will tend to the street value of 440 ppm, whereas higher values are required for full photosynthesis
Heating of the air environment inside the greenhouse is due to the receipt of energy from solar radiation, as well as from the lighting system
Summary
Modern semi-closed greenhouses of the V generation, equipped with microclimate adjustment systems, provide ample opportunities for their use in a number of regions of our country. The heating, cooling and humidification systems used in them, as well as CO2 enrichment, are largely able to neutralize the negative impact of the environment. This becomes especially relevant in the development of such a direction as the biologization of agriculture. Air temperature during the fruiting period, оС 21 - 23 20 - 22 18 - 20 18 20 18 - 22
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