Ventilation design requirements for greenhouses
According to the purpose of greenhouse ventilation, the basic requirement of its design is that the ventilation system should be able to provide sufficient ventilation, effectively control the indoor temperature, humidity and CO2 concentration, and meet the conditions required for the normal growth of indoor cultivated plants. The requirements for ventilation in the greenhouse vary with the types of cultivated plants, growth stages, cultivation areas and cultivation seasons, as well as different times of the day and different outdoor climate conditions. Therefore, it is required that the ventilation volume can be effective within a certain range according to different needs. adjust.
In order to ensure that the crops have appropriate leaf temperature and transpiration intensity and are conducive to the diffusion and absorption of CO2, the indoor airflow velocity is required to be suitable, generally about 0.3~0.5m/s, and the airflow velocity can be increased appropriately when the humidity is high and the light intensity is high. . The layout of the ventilation system should make the indoor air flow as uniform as possible, and avoid cold wind directly blowing to the plants in winter.
