Cooling water for a chemical plant must be pumped from a river 2,500 ft from the plant site. A preliminary design calls for a flow rate of 600 gpm and a 6" steel pipe. Calculate the pressure drop and the annual pumping costs if power costs 3 cents per kilowatt hour. Would the use of an 8" steel pipe reduce the power cost enough to offset the increased pipe cost? Assume $15/ft for the installed cost of 6" pipe and $20/ft for the installed cost of 8" pipe. Annual charges are estimated at 20% of the installed cost.

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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Cooling water for a chemical plant must be pumped from a river 2,500 ft from the plant site. A preliminary design calls for a flow rate of 600 gpm and a 6" steel pipe. Calculate the pressure drop and the annual pumping costs if power costs 3 cents per kilowatt hour. Would the use of an 8" steel pipe reduce the power cost enough to offset the increased pipe cost? Assume $15/ft for the installed cost of 6" pipe and $20/ft for the installed cost of 8" pipe. Annual charges are estimated at 20% of the installed cost.
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