Question

In a chemical processing plant, liquid cyclohexane (p = 48.5 lbm/ft^3) flows through .a piping system (pump, piping, valves, etc.) at a rate of 1200 gpm as it is being transported from one process to the next. The pressure drop through the pipe system is 6.4 psi. The facility is automated and runs 24 h/day, 365 days/year. The cost of energy to operate the pump in the system is $0.12/kWh. Annual maintenance costs for the piping system are 3% of the annual operating cost. The annual income resulting from the piping system is $17, 500. The initial cost of the piping system is $60,000. The system is expected to last for 15 years with no salvage value. Determine the rate of return that this piping system provides.Determine the rate of return that this piping system provides. Assume the annual compound 1 gpm=8.021ft^3hr, 1 kw = 5.42327x 100 psi* ft^3/hr

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