Determine the available NPSH for the pump in Practice Problem 7.14 if the water is at 80°...

Determine the available NPSH for the pump in Practice Problem 7.14 if the water is at 80° F and the atmospheric pressure is 14.4 psia. Repeat the calculations for water at 180° F.

Problem 7.14

The pump in Fig. 7.20 delivers water from the lower to the upper reservoir at the rate of 2.0 ft3/s. The energy loss between the suction pipe inlet and the pump is 6 lb-ft/lb and that between the pump outlet and the upper reservoir is 12 lb-ft/lb. Both pipes are 6-in Schedule 40 steel pipe. Calculate (a) the pressure at the pump inlet, (b) the pressure at the pump outlet, (c) the total head on the pump, and (d) the power delivered by the pump to the water.

FIGURE 7.20