An oil pump is drawing 44 kW of electric power while

Chapter 2, Problem 74P

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An oil pump is drawing \(44 \mathrm{~kW}\) of electric power while pumping oil with \(\rho=860 \mathrm{~kg} / \mathrm{m}^{3}\) at a rate of \(0.1 \mathrm{~m}^{3} / \mathrm{s}\). The inlet and outlet diameters of the pipe are \(8 \mathrm{~cm}\) and \(12 \mathrm{~cm}\), respectively. If the pressure rise of oil in the pump is measured to be \(500 \mathrm{kPa}\) and the motor efficiency is 90 percent, determine the mechanical efficiency of the pump

FIGURE P2–74

Equation Transcription:

Text Transcription:

44 kW

rho=860 kg/m^3

0.1 m3/s

8 cm

12 cm

500 kPa

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