Selection of fans
Thread Content
The pipeline is approximately 15 meters long; the first 6 meters have a diameter of DN400, while the remaining section has a reduced diameter of DN200. The air flow rate is 30,000 m^3/h. What is the pressure loss in the pipeline? What pressure rating should the fan have? Thank you! Last edited by kingberg on 2009-2-22 12:08 in this post.]
The wind speeds in the upstream and downstream pipelines reached 66.35 and 265.40 m/s respectively! It’s extremely unreasonable; it’s not used in normal engineering practices. It is recommended to adjust the pipe diameter for transportation at the economic wind speed.
A too large change in diameter results in high resistance, which is not conducive to ventilation! ! ! !
1. The air flow rate for the DN200 pipeline is 30,000 m^3/h; the diameter of the pipeline is too small； 2. LZ didn’t even specify the operating wind pressure; how can one choose the fan pressure?
A few days ago I saw one with a front diameter of DN800; it works well in practice, but I don’t know how to do the specific calculations! :lol :lol
The pipeline resistance is 45,000 Pa; this system cannot be used. It is recommended to use pipelines with a resistance of 900–1000.