Water at 60 F from a lake through 500 ft if 4in ID cast iron pipe at a water turbine 250 ft below the surface of the lake. After flowing from the turbine, the water is discharged into the atmosphere through a horizontal 50 ft section of the same pipe. The turbine power output is 10hp when the water in the discharged pipe is flowing at 5 ft/s. What is the turbine efficiency defined as the actual power output of the turbine divided by the power output that would be withdrawn if there are no friction within the turbine. If the turbine were by passed, what would be the flow rate of water through the 500 ft of 4in pipe.
Water at 60 F from a lake through 500 ft if 4in ID cast iron pipe at a water turbine 250 ft below the surface of the lake. After flowing from the turbine, the water is discharged into the atmosphere through a horizontal 50 ft section of the same pipe. The turbine power output is 10hp when the water in the discharged pipe is flowing at 5 ft/s. What is the turbine efficiency defined as the actual power output of the turbine divided by the power output that would be withdrawn if there are no friction within the turbine. If the turbine were by passed, what would be the flow rate of water through the 500 ft of 4in pipe.
a. Draw the diagram.
b. Solve the problem. Provide complete solution.
Ans. Ws/w%= 87.0095%
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