A centrifugal pump is being used to transport 45 m3/h of a 20% ethylene glycol solution at 0°C. The suction pipe inlet to the pump is 2½-nom sch 40 and the pump discharge pipe is 2-nom sch 40. Pressure gauges on the suction and discharge ports of the pump indicate −15 kPa and 250 kPa, respectively. The elevation difference between the suction and discharge ports of the pump is 0.08 m.
At this condition, the pump has an efficiency of 68%. Determine the following:

a. The head produced by this pump (m)

b. The percentage of the total pump head that is used to increase the fluid’s

(i) pressure, (ii) velocity, and (iii) elevation

c. The power input required by the electric motor that drives this pump (kW)

d. The annual cost required to operate this pump if it runs for 8 hr/day for a total of 260 days and the cost of electrical energy is $0.12/kWh