An oil pump is drawing 40 kW of electric power while pumping oilwith p = 860 kg/m³ at a volume flow rate of 0.1 m³/s. The inlet andoutlet diameters of the pipe are 8cm and 16cm respectively. If thepressure rise of oil in the pump is measured to be 400 kPa, and themotor efficiency is 90 percent.(1) What is the change of mechanical energy rate AEmech as thefluid flows through the pump? (Neglect the change of potentialenergy of the fluid)(2) What is the mechanical efficiency of the pump, and what is theoverall mechanical efficiency of the pump-motor unit?Pump outletDiameter 16cmPUMPPump inletdiameter 8cmMotor40 kW

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Answered: An oil pump is drawing 40 kW of…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Question

An oil pump is drawing 40 kW of electric power while pumping oil
with p = 860 kg/m³ at a volume flow rate of 0.1 m³/s. The inlet and
outlet diameters of the pipe are 8cm and 16cm respectively. If the
pressure rise of oil in the pump is measured to be 400 kPa, and the
motor efficiency is 90 percent.
(1) What is the change of mechanical energy rate AEmech as the
fluid flows through the pump? (Neglect the change of potential
energy of the fluid)
(2) What is the mechanical efficiency of the pump, and what is the
overall mechanical efficiency of the pump-motor unit?
Pump outlet
Diameter 16cm
PUMP
Pump inlet
diameter 8cm
Motor
40 kW

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