Water at 20°C is pumped at 1500 gal/min from the lower to the upper reservoir, as in

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Water at 20°C is pumped at 1500 gal/min from the lower to the upper reservoir, as in Fig. P3.141. Pipe friction losses are approximated by hf ≈ 27V2 /(2g), where V is the average velocity in the pipe. If the pump is 75 percent efficient, what horsepower is needed to drive it?

Water at 20°C is pumped at 1500 gal/min
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Thermodynamics An Engineering Approach

ISBN: 978-0073398174

8th edition

Authors: Yunus A. Cengel, Michael A. Boles

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