Hello, Can we estimate flowrate

[mohtogh]

Hello,
Can we estimate flowrate of a fan with its kilowatt and/or diameter and/or "water volume of it" ?
Thanks

 

[aliansari]

yes i think it is possible to estimate operating capacity of the fan from driver power input info.If you have a manometer reading available at the discharge duct, (fan developed pressure) please use the following equation I have taken from Steam Plant Calculation Manual p-156 by V Ganapathy.BHP = q x Hw/(6356nf)
\whereBHP Fan Break Horsepower HPq air flow acfmHw developed head inches of waternf fan efficiency from fan curve
further BHP = KW motor x motor efficiency typical 90%Hope this would suffice. Regards Ansari