Air conditioning for a university campus is provided by chilled water pumped through a main supply line ..The pipe-which makes a three-mile loop around the campus, is made of commercial steel and must be sized to handle 12,000 gpm. Chilled water enters the pipe at 38°F and leaves at 59°F.The pump/motor efficiency is 67 percent; electricity costs $0.08 per kWh; and the demand charge is $9.00 per kW per month. As a function of diameter, determine the pipe pressure drop and the power required to pump the water around the loop. Select a diameter for the pipe, and defend your diameter selection.
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