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A town derives its water supply from lake nearby, pumping it up to a standpipe on the highest hill. The intake to the system is 10 ft below the lake surface. The inlet to the pump is 15 ft above the lake surface and the water in the tower kept constant 310 ft above the pump discharge. The friction loss is 140 (ft-lbf)/lbm of water through 6000 ft of 4-in S40 standard pipeline which includes total equivalent length of all piping from the lake to the water tower. If the pump capacity is 6000 gallons per hour, and the pump is set at 85% capacity, what would be the hourly pumping cost (in cents per hour) is electrical power is 10 cents/kWh.

A town derives its water supply from lake nearby, pumping it up to a standpipe on the highest hill. The intake to the system is 10 ft below the lake surface. The inlet to the pump is 15 ft above the lake surface and the water in the tower kept constant 310 ft above the pump discharge. The friction loss is 140 (ft-lbf)/lbm of water through 6000 ft of 4-in S40 standard pipeline which includes total equivalent length of all piping from the lake to the water tower. If the pump capacity is 6000 gallons per hour, and the pump is set at 85% capacity, what would be the hourly pumping cost (in cents per hour) is electrical power is 10 cents/kWh.

Introduction to Chemical Engineering Thermodynamics
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
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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A town derives its water supply from lake nearby, pumping it up to a standpipe on the highest hill. The intake to the system is 10 ft below the lake surface. The inlet to the pump is 15 ft above the lake surface and the water in the tower kept constant 310 ft above the pump discharge. The friction loss is 140 (ft-lbr)/lbm of water through 6000 ft of 4-in S40 standard pipeline which includes total equivalent length of all piping from the lake to the water tower. If the pump capacity is 6000 gallons per hour, and the pump is set at 85% capacity, what would be the hourly pumping cost (in cents per hour) is electrical power is 10 cents/kWh.
Transcribed Image Text:A town derives its water supply from lake nearby, pumping it up to a standpipe on the highest hill. The intake to the system is 10 ft below the lake surface. The inlet to the pump is 15 ft above the lake surface and the water in the tower kept constant 310 ft above the pump discharge. The friction loss is 140 (ft-lbr)/lbm of water through 6000 ft of 4-in S40 standard pipeline which includes total equivalent length of all piping from the lake to the water tower. If the pump capacity is 6000 gallons per hour, and the pump is set at 85% capacity, what would be the hourly pumping cost (in cents per hour) is electrical power is 10 cents/kWh.
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