Find overall efficiency of the motor-pump system


An oil pump is powered by a 5kW electric motor. The pressure at the outlet and the inlet of the pump at full load is measured to be 450 kPa and 200kPa, respectively. If the oil flow rate through the pump is 18L/s and the changes in elevation and the flow velocity across the pump are negligible. Determine 1) the energy flow rate of the oil at the inlet; 2) the difference of energy flow rate between the outlet and inlet; 3) the overall efficiency of the motor-pump system?

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Mechanical Engineering: Find overall efficiency of the motor-pump system
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