# hw5 - The diameter of the pipe is 8 cm on the intake side...

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HOMEWORK #5 Finish reading Chapter 5, Read 6-1 through 6-4. Problem 1 Consider a river flowing toward a lake at an average velocity of 3 m/s and a volume flow rate of 500 m 3 /s. If all of the river flows through a turbine, what is the minimum height drop required to generate 444 MW of power? Problem 2 Water is pumped from a lake to a storage tank 40 m above at a rate of 50 L/s while consuming 20.4 kW of electric power. Disregarding any frictional losses in the pipes and any changes in kinetic energy determine (a) the overall efficiency of the pump-motor unit and (b) the pressure difference between the inlet and exit of the pump. ? m 40 m

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Problem 3 Underground water is to be pumped using a 70% efficient 5 kW pump to a pool above.
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Unformatted text preview: The diameter of the pipe is 8 cm on the intake side and 5 cm on the discharge side. The volume flow rate is 8 x 10-3 m 3 /s. Find the a) Mass flow rate; b) the maximum height that the water can be pumped up and c) the pressure difference across the pump. For part c) you may assume that the elevation difference between the pump inlet and outlet are negligible. Problem 4 ?? m Problem 5 Water flows through a horizontal pipe with a 5 cm diameter at 20 L/s. The pressure drop across a valve is measured to be 2.5 kPa. Find the irreversible head loss of the valve, and the pump power needed to overcome the resulting pressure drop. Problem 6 Δ P= 2.5 kPa...
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hw5 - The diameter of the pipe is 8 cm on the intake side...

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