The design wind speed is 6 m/s.
According to the exhaust volume of different units divided by the wind speed, the effective exhaust area is divided by the space coefficient of the silencer group (generally 0.6). This will give you the surface area of the air outlet. If the exhaust air is to rotate, the surface area must be increased and the surface area of each 90 degree elbow is increased by 15%
The air inlet volume is the volume of air exhausted plus the gas volume plus the exhaust volume for heat dissipation in the computer room.