4.23 A centrifugal pump is being used to transport 440 gpm of benzene at 80F. The suction...

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4.23 A centrifugal pump is being used to transport 440 gpm of benzene at 80°F. The suction pipe inlet to the pump is 6-nom sch 40 and the pump discharge pipe is 5-nom sch 40. Pressure gauges on the suction and discharge ports of the pump indicate −4 psig and 55 psig, respectively. The elevation difference between the suction and discharge ports of the pump is 0.2 ft. At this condition, the pump has an efficiency of 55%. Determine the following:

a. The head produced by this pump (ft)

b. The power input required by the electric motor that drives this pump

(kW).

c. The annual cost required to operate this pump if it runs for 16 h/day for a total of 240 days, and the cost of electrical energy is 0.10 $/kW·h

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