A metal pipe (ID: 20 cm, friction factor: 0.012) is used to deliver cooling water (10°C) from Tank A (elevation: 250 m) to Tank B (elevation: 275 m). Both tanks are cylindrical and have the same bottom diameter of 20 m). The head space pressures of Tank A and Tank B are 15.1 psia and 14.8 psia, respectively. The total pipe length is 2000 m, with two wide-open angle valves in between. The minor loss coefficients involved are 0.5 (pipe entrance), 5.0 (angle valves), and 1.0 (pipe exit). To deliver water at 200 GPM, how much energy (in kWh) will the pump most approximately consume in 12 hours if the pump efficiency is 85%?

A metal pipe (ID: 20 cm, friction factor: 0.012) is used to deliver cooling water (10°C) from Tank A (elevation: 250 m) to Tank B (elevation: 275 m). Both tanks are cylindrical and have the same bottom diameter of 20 m). The head space pressures of Tank A and Tank B are 15.1 psia and 14.8 psia, respectively. The total pipe length is 2000 m, with two wide-open angle valves in between. The minor loss coefficients involved are 0.5 (pipe entrance), 5.0 (angle valves), and 1.0 (pipe exit). To deliver water at 200 GPM, how much energy (in kWh) will the pump most approximately consume in 12 hours if the pump efficiency is 85%?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A fluid is a substance that is continuously deformed by the application of shear stress. The rate of deformation of a fluid depends on its viscosity. The fluid tries to flow when it interacts with some other system.

Question

A metal pipe (ID: 20 cm, friction factor: 0.012) is used to deliver cooling water (10°C) from Tank A (elevation: 250 m) to Tank B (elevation: 275 m). Both tanks are cylindrical and have the same
bottom diameter of 20 m). The head space pressures of Tank A and Tank B are 15.1 psia and 14.8 psia, respectively. The total pipe length is 2000 m, with two wide-open angle valves in between.
The minor loss coefficients involved are 0.5 (pipe entrance), 5.0 (angle valves), and 1.0 (pipe exit). To deliver water at 200 GPM, how much energy (in kWh) will the pump most approximately
consume in 12 hours if the pump efficiency is 85%?
O 45.1 kWh
O 32.6 kWh
O 57.9 kWh
O 38.4 kWh

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Consider a pipe that has a diameter D = 18 inches and a length L = 2,000 feet. The pipe delivers water from an upper reservoir to a lower reservoir. The water surface elevation of the upper reservoir is 50 feet and the water surface elevation of the lower reservoir is 0 feet. The water temperature is 50°F. Use the Darcy- Weisbach equation with a friction factor f = 0.0125 to evaluate the friction head loss hfric. Assume that minor losses are equivalent to 15% of the friction head losses (i.e., hminar = 0.15 x hfic So total head loss hi total = hfic + hminar = 1.15 x hfnc). a) Determine the flow in cubic feet per second (cfs). b) Determine the friction head loss hfñic in feet. c) Determine the minor head loss hminar in feet. d) Does hfric + hminer = 50 feet? If yes, GREAT! If not, find your mistake.
I need help on this question: According to the question: a) If the pipe connected to the pump inlet has a diameter of 24 mm with length (LCP) of 5 m and Darcy friction factor of 0.03, what would be the actual head rise across the pump for a case where the pump outlet pressure is 200 kPa? The difference in height between pump inlet and outlet is 0.25 m, the tank exit is sharp-edged, and the water level in the tank to the tank exit pipe (HWL) is 2 m. Also, consider that the flow velocity inside the tank is negligible. The value of the actual head rise across the pump is = ? b) What would be the pump motor power if the efficiency is 60%? The value of the pump motor power is = ?
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Consider a pump system that delivers water at a flow of Q = 5 cubic feet per second (cfs) in a steel pipe (ɛ = 0.00020 feet) between two large open reservoirs. The diameter of both the suction pipe and the discharge pipe is D = 12 inches. The friction factor is f = 0.015646. The total length of the pipe is L = 1,525 feet. The water surface elevation of the receiving reservoir is 80 feet higher than the water surface elevation of the supply reservoir so (z2 – z1) = 80 feet. The water temperature is 50°F. The kinematic viscosity of the water is 1.41 x 10 5 ft2/s. The efficiency of the pump is 68% and the efficiency of the electric motor is 88%. Use the Darcy-Weisbach equation to evaluate the friction head loss. Also, evaluate the minor head losses. The pipe section on the suction side of the pump and has a diameter of D1 = 12 inches, a length of L1 = 25 feet, and a friction factor of f = 0.015646. The entrance from the reservoir into the suction pipe is a projecting entrance. Then, there…