Fan air volume, pressure and altitude, temperature relationship

                             Fan air volume, pressure and altitude, temperature relationship

Fan used in high altitude altitude should consider when selection of density on the influence of wind pressure
Start with the following table found to different altitude of gas density
M m 1000 2000 3000 4000 5000
The density of 0.7 0.98 0.93 0.88 0.78 kg/m3
Model selection of the fan air volume in accordance with the design requirements is again good wind pressure in accordance with the design value selection according to the density ratio of the standard of pressure value
For working condition of design value 3000 m altitude air volume of 10000 m3 / h wind 2000 pa
For model selection of the sample are standard conditions so to air volume of 10000 m3 / h wind 2000 * (1.2/0.68) = 3529 pa selection
According to this specification to select the fan model speed when installing at 3000 m altitude wind pressure air volume is 10000 m3 / h 2000 pa
As for the motor selection for working condition of power not to sample power only to pay attention to when the factory test due to the working condition of factory is near the sea with high density electric power will there is a risk of overload

Fan used in the model selection of the temperature of different gases to consider temperature on the density of wind pressure on the influence of motor power
Working condition of gas density with temperature inversely proportional density = standard of density ((273 + 20)/(273 + condition temperature))
Model selection of the fan air volume in accordance with the design requirements is again good wind pressure in accordance with the design value selection according to the density ratio of the standard of pressure value
For working condition of design value 80 C air volume of 10000 m3 / h wind 2000 pa
The air density of 80 C = 1.2 ((273 + 20)/(273 + 80) = 0.97
For model selection of the sample are standard conditions so to air volume of 10000 m3 / h wind 2000 * (1.2/0.97) = 2474 pa selection
According to this specification to select the fan model speed when installing at 80 C wind pressure air volume is 10000 m3 / h 2000 pa
As for the motor selection for working condition of power not to sample power only to pay attention to in his factory test with the manufacturer is in 20 degrees C density 1.2 with the working condition of motor power will there is a risk of overload