Calculates the pressure drop or the dynamic pressure drop of a channel
part suction or blowing air (ventilation channel) with rectangular section.
For circuits composed by different parts with different sections is necessary calculate separately and sum the results of each part.
Selection channel material
Notes on the material
Absolute roughness of the inner wall
Side of the channel . . . W
Side of the channel . . . H
Required flow rate
Selection of the gas to be carried
90 degrees curve
|Gas velocity in the tube||m/s|
|Relative roughness of the inner wall||r/d|
|Friction coefficient (Colebrook)|
|Result of dynamic pressure drop||mm H2O|
|Equivalent section diameter||mm|
|Equivalent hydraulic diameter||mm|
|Section of the channel||m2|
The apps about pressure drop.