Calculate fan flow rate
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It is a centrifugal fan whose nameplate specifications indicate a pressure of 4500 Pa, a flow rate of 38,000 Nm3/h, and a power rating of 159.5 KW. It is operated using a frequency converter; currently, the frequency converter is set at 25 Hz, the current is 130 A, and the rotational speed is 743 r/min. The pressure at the inlet is 350 Pa. I would like to know what the flow rate is Centrifugal fan, flow rate
Does this parameter require such a high power level? 75 KW is sufficient for us; it shouldn’t be operating at temperatures several degrees below zero, right? The questioner has provided many conditions, but none of them fit according to the three laws of fans. Is the speed indicated on the nameplate? It would be easier if the speed were there.
The shaft power is calculated based on the motor power and efficiency. Shaft power equals the total pressure of the fan multiplied by the flow rate, divided by the fan’s efficiency; the flow rate can be determined by reversing this calculation