Relative humidity in green houses

AbstractAny change in temperature causes a change in relative humidity. The need for good knowledge of this growth factor is caused by the fact that vegetable plants develop best, and the main greenhouse crops give a greater yield at a certain relative humidity. Large deviations from optimal air humidity create the conditions for the development of certain diseases and pests, and therefore, the patterns of changes in air pollution during the day are of scientific and practical interest. Relative humidity is generally the same in all sections of the greenhouse due to turbulent air exchange due to the accumulation of solar energy, the action of the heating system and air infiltration. Despite this peculiarity of air humidity, due to the higher temperature in the greenhouse due to heating and heat accumulation during hours of sunshine, the air removed from the greenhouse during ventilation contains more water vapor than the air entering the greenhouse. Wind humidity also affects air humidity in a greenhouse with closed transoms. The ventilation pressure is determined by the difference in air pressure outside and inside the greenhouse, as well as the height of the greenhouse.

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