How Much Oil Can a 65% Efficient 5kW Motor Pump Per Minute?

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SUMMARY

The discussion centers on calculating the oil pumping capacity of a 5 kW motor operating at 65% efficiency. To determine the output, one must first calculate the work done to lift 1 liter of oil, which weighs 1.30 kg, to a height of 20 meters. The energy required for this lift is derived from gravitational potential energy, and the effective energy output of the motor is calculated by factoring in its efficiency. Ultimately, this leads to a precise measurement of the liters of oil that can be pumped per minute.

PREREQUISITES
  • Understanding of gravitational potential energy calculations
  • Basic knowledge of motor efficiency concepts
  • Familiarity with power and energy units (kW, Joules)
  • Ability to perform unit conversions (liters to kilograms)
NEXT STEPS
  • Calculate gravitational potential energy for lifting fluids
  • Research motor efficiency and its impact on output
  • Explore fluid dynamics principles related to pumping systems
  • Learn about energy conversion in electrical motors
USEFUL FOR

Engineers, mechanical technicians, and anyone involved in fluid dynamics or motor applications will benefit from this discussion.

tysajdak
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Homework Statement


I am using a 5 kilowatt motor to pump oil to a holding tank which is 20 m above the pump. If the motor is 65% efficient, how many liters of oil can i pump per minute if 1 liter of oil has a mass of 1.30 kg?

Homework Equations


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The Attempt at a Solution


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tysajdak said:

The Attempt at a Solution


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Well if the efficiency is 65% how much is the work output of the motor?
 
How much energy does it take to lift 1 liter of oil 20 meters? After accounting for the efficiency of the motor, how much energy per minute is furnished to the pump?
 

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