14. Cooling water for a chemical plant must be pumped from a river 2,500ft from the plant site. Preliminary design calls for a flow of 600gal/min and 6 -in. steel pipe. Calculate the pressure drop and the annual pumping cost if power costs 3 cents per kilowatt hour. Would the use of an 8 -in. pipe reduce the power cost enough to offset the increased pipe cost? Use $15/ft of length for the installed cost of 6 -in. pipe and $20/ft for 8 -in. pipe. Annual charges are 20 percent of the installed cost