What motor power choose to drive the fan?
A fast calculation gives :
Power absorbed by the fan :
Pabs. = Q x H / (100 x η),
with
- Pabs in kW
- Q in m³/s
- H in daPa
- The efficiency of the fan ρ = 0.75 as middle value.
To this value a factor of 15% should be add, then we choose the first standard power motor higher than the calculated value.