Determine the fan power input if:
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It is proposed to use a centrifugal fan in a mechanical ventilation system. The fan is required to deliver a volumetric flow rate of 1.8 m3
/s with an estimated system resistance of 500 Pa. The fan under consideration delivers 2.1 m3/s against a e6394153
resistance of 5000 Pa, while running at a speed of 1440 rpm. Determine the fan
power input if:
1. A volume control damper is used to achieve the required flow rate by
increasing the system resistance by 250 Pa.
2. The fan speed is reduced to deliver 1.8 m3
/s.
Which option would you recommend and why?
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