The system shown in Fig. P1-20 is used to pump 350 gpm from the lower reservoir to the upper reservoir (located 190 ft above the lower).
(a) Find the head increase across the pump, the power delivered to the fluid, and the power delivered to the shaft if the pump motor is 43 percent efficient.
(b) Repeat part (a) if the elevation is raised to 250 ft.
(c) Repeat part (a) if the elevation is decreased to 100 ft.
(d) Repeat part (a) if the elevation is 190 ft and the pipe is changed to 2 inches in diameter.
(e) Repeat part (a) if the elevation is increased to 250 ft with the 2-in. diameter pipe.
(1) Repeat part (a) if the elevation is decreased to 100 ft with the 2-in. diameter pipe.
(g) What is the incremental power required for the 250-ft elevation for the 4- and 2-in. pipes? For the 100-ft elevation for the 4- and 2-in. pipes? For a given length of pipe, what does this say about the effect of pipe size on pumping power as the elevation is changed?