The definition of fan air volume is the product of wind speed V and duct cross-sectional area F. For large fans, since the wind speed can be accurately measured with an anemometer, the air volume calculation is also very simple. The air volume can be calculated directly by using the formula Q = VF.

Determination of the number of fans: According to the air exchange rate of the selected room, calculate the total air volume required for the plant, and then calculate the number of fans.
Calculation formula: N = V×n/Q. Among them: N – the number of fans (sets); V – site volume (m3); n – air exchange rate (times/hour); Q – the single-unit air volume (m3/h) of the selected fan model.

The selection of fan models should be based on the actual situation of the plant. Try to select fan models that match the original window size as much as possible. Keep a certain distance between the fan and the wet curtain as much as possible (install them on both sides of the gable of the plant as much as possible) to achieve good ventilation and air exchange effects. Try not to install the exhaust side close to nearby buildings to prevent affecting nearby residents. If the air brought out from the room contains pollutants that pollute the environment, a water spraying device can be installed at the air outlet to centrally collect nearby pollutants without polluting the environment.