Question

1 A pump delivers water from the lower reservoir to the upper reservoir at a rate of 60 L/s. Both the suction and discharge pipes are DN 150 schedule 40steel pipe. The length of the suction pipe leading to the pump is 3.5 m, and 7 m of discharge pipe extend from the pump outlet to the upper tank. There are three standard 900 elbows and a fully open gate valve. The depth of the fluid level inside the lower tank is 3 m. Discharge pipe 10 m Suction pipe Flow Pump 3 m Note:45x10- m a) Write the assumptions you made in order to solve the problem [5]. b) Calculate the pressure at the pump inlet and outlet10 c) Calculate the generated power by the flow of water at the exit with 80% efficiency [10].

Answer 1

lom Pum? d- C-29 bend ave0.12 2.ц6 4- -- 3.395 m[S -kinematic viscocity 아(Natty = 10-6m7s 20 с

ReReyrold = 3.395X 0-1 509296 0-15O し 0062513 O150 1.1315 乙+ 133Sx 3.395 D /2 nl 2x9.3/

Paesare at in l et 三 6.20 6 x 9.al KPa (2) e 60.82 кра (daSolute) Po 6.206 t 15.113 y 21-32m). (po) Ξ 209.ly КРа (absolute 0.8 85 33 kw

Answer 2

6-9. The pump in Figure 3 delivers water from the lower to upper reservoir at

the rate of 2.0 ft3⁄s. The energy loss between the suction pipe inlet and the pump is

6 ft and that between the pump outlet and the upper reservoir is 12 ft. Both pipes are

6 in schedule 40 steel pipe.