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A factory has a 70 kW motor in a centrifugal fan in an air handler unit....

A factory has a 70 kW motor in a centrifugal fan in an air handler unit. At Full speed, the fan supplies enough air flow to meet the hottest day's cooling needs. On a mild day, quarter of that flow rate in (L/s) would meet the cooling load. If a variable speed drive (VSD) is put on that motor to run it at quarter speed, How much will be the power needed to operate the fan at reduced speed?

1.1 kW

8.75 kW

17.5 kW

35 kW
Engineering   Electrical-Engineering   
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