Determine the working conditions (HP, Q, e, and Pi) of a pump capable of moving water (6 8°F) C7from reservoir A to reservoir B (EA = 102 ft and E8 = I 80 ft ). The LO-ft -diameter pipe connecting the two reservoirs has a length of 8,700 ft, and Cmv = 100. The pump characteristics are available in Figure P5. I l .5. Also verify that the pump efficiency obtained from the pump characteristic curves (Figure P5.1 1.5) corresponds with the pump efficiency obtained from efficiency equations.

A project requires a pump that will operate with a minimum discharge of 20 L/ sec against an elevation head of 40 m. The distance between the supply and delivery points is l 50 m. A ball check valve will be used in the system that consists of commercial steel pipes. Determine the most economical pipe diameter for the pipeline and select a single pump from Figure 5.24 (including its operating conditions) if the total cost can be expressed as
C = d1.75 + 0.15P + 18
where d is the pipe diameter in centimeters and P is the pump horsepower input.

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100 70 60 100 80 40 30 power inpul orse 40 10 Tested a 1450 rps 0 200 4 6081000 Plow (gpm) Figure P5.11.5