P12.3 A pump delivers water to a pipe network of diameter 40 mm and length 25 m. The pipe section has six 90°-elbows and a gate valve at the exit. The system uses schedule-40 steel pipes with threaded fittings. (i) Obtain the system curve when the valve is fully open. What is the ideal work input to the pump when the flow rate through the pipe network is 3.4 Ls¯¹? (ii) If the loss coefficient of the gate valve when it is partially closed is 1.2, obtain the new system curve with the valve partially closed. [Answers: (i) AH = 720 × 10³Q², 278 W, (ii) AH = 750 × 10³Q,²]

P12.3 A pump delivers water to a pipe network of diameter 40 mm and length 25 m. The pipe section has six 90°-elbows and a gate valve at the exit. The system uses schedule-40 steel pipes with threaded fittings. (i) Obtain the system curve when the valve is fully open. What is the ideal work input to the pump when the flow rate through the pipe network is 3.4 Ls¯¹? (ii) If the loss coefficient of the gate valve when it is partially closed is 1.2, obtain the new system curve with the valve partially closed. [Answers: (i) AH = 720 × 10³Q², 278 W, (ii) AH = 750 × 10³Q,²]

Elements Of Electromagnetics

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Author:Sadiku, Matthew N. O.

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Applied Fluid Mechanics

A fluid is a substance that is continuously deformed by the application of shear stress. The rate of deformation of a fluid depends on its viscosity. The fluid tries to flow when it interacts with some other system.

Question

P12.3 A pump delivers water to a pipe network of diameter 40 mm and
length 25 m. The pipe section has six 90°-elbows and a gate valve at the
exit. The system uses schedule-40 steel pipes with threaded fittings. (i)
Obtain the system curve when the valve is fully open. What is the ideal
work input to the pump when the flow rate through the pipe network is
3.4 Ls ¹? (ii) If the loss coefficient of the gate valve when it is partially
closed is 1.2, obtain the new system curve with the valve partially closed.
[Answers: (1) AH = 720 x 10³Q², 278 W, (ii) AH = 750 × 10³Q,²]

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