Question

You must show ALL work for full credit. Also, it needs to be LEGIBLE. Label and BOX all answers. 1. (100 points) Water at 25°C is pumped at a rate of 0.075m/s from a reservoir 20m above a pump to a free discharge (this means discharged to atmosphere) 35m above the pump. The pressure on the intake side of the pump is 150kPa and the pressure on the discharge side of the pump is 450kPa. The pipe between the reservoir and the pump is 3 meters of 5in diameter cast iron. From the pump to the discharge the pipe is 50m of 25cm commercial steel. Each elbow is a regular flanged elbow. a. Determine the head supplied by the pump b. Total head loss between the pump and the discharge c. If operating at 1750rpm. Calculate the specific speed and state what type of pump should be used d. Select a pump from the provided curves e. Provide the bhp and efficiency of the pump f. Is the pump in danger of cavitation? Justify your answer. Elbows are flanged) Free discharge 4-35 m 1-20m Pa-450 kPa P2-150 kPa

Answer 1

olution d by tha (a) Noco, calculating the hea d supie pump 8 oo, appiying the besnoutt s pincipte betanen cg we hacoe 3 Then eg e) e dp 9.8/x1000 B0OX HP = 30.581m

) No, calculatag the otat head loss betive n the pomp and point of oschage ts 3 29 eg be ha coe 4 3 eg 3 O 35 thy eg 450 x1o 7, 8I xloo0 150X 35 450 35 9.81