Modify Prob. P6.76 into an economic analysis, as follows: Let the 40 m of wrought iron
Chapter 6, Problem p6.77(choose chapter or problem)
Modify Prob. P6.76 into an economic analysis, as follows: Let the 40 m of wrought iron pipe have a uniform diameter d. Let the steady water fl ow available be Q 5 30 m3 /h. The cost of the turbine is $4 per watt developed, and the cost of the piping is $75 per centimeter of diameter. The power generated may be sold for $0.08 per kilowatt-hour. Find the proper pipe diameter for minimum payback timethat is, the minimum time for which the power sales will equal the initial cost of the system.
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