A centrifugal pump is used to transfer a brine solution (specific gravity sg = 1.18, viscosity μ = 1.2 cP) from the bottom of a supply tank to a second tank. The brine level in the discharge tank is 45 m above that in the supply tank. The line between the tanks is 190 m long of 4-inch Schedule 40 pipe. The flow rate is 90 m³/h. In the line are two gate valves, fully open; four tees used as ells; and four 90° standard elbows. Assuming the efficiency of the pump is 60%, answer the following questions:
What is the power delivered by the pump to the fluid?
A. 18.8 kW
B. 38.9 kW
C. 28.5 kW
D. 20.2 kW
Estimate the total friction losses in the line in J/kg, including contraction and expansion losses.
A. 117.8
B. 104.1
C. 159.2
D. 195.6