Where Does the Energy Go in an Electric High Pressure Water Motor or Pump?

In summary, the main causes of energy loss in an electrical high pressure water motor or pump are heat and electrical losses in the motor, friction of the water in pipes, and noise. The specific cause of energy loss can vary depending on factors such as motor size, efficiency, flow rates, and pipe length. In regards to pressure washers, the biggest energy loss is typically from creating the differential pressure, followed by losses in the drive motor. Fluid losses are usually minimal due to low flow rates. More research and comparison is needed to obtain a quantitative value for the energy loss.
  • #1
Patrick Jago
4
0
In an electrical high pressure water motor or pump what is the main cause of energy loss.
Originally I was thinking along the lines of
1st heat/electrical losses in motor.
2nd Friction of the water in pipes.
3rd noise. But I'm torn between the first 2 ? Tho
 
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  • #2
  1. :welcome:

How could there be a universal answer?

  1. The Motor can be over /under sized, or high /low efficiency.
  2. High or low flow rates.
  3. Long or short pipe runs.
  4. Losses measured at the pump outlet or at the pipe ends.
 
  • #3
Agreed

Although this question in particular is concerning a pressure washer.
 
  • #4
Patrick Jago said:
Agreed

Although this question in particular is concerning a pressure washer.
Have you done any comparison yet of electrical input and PV output? to obtain for a quantitative value for the loss.
 
  • #5
Most common pressure washers are simple positive displacement pumps with pistons, check valves used to control flow into and out of the cylinders. If that's what you're talking about then the biggest loss is usually creating the differential pressure. After that I would suspect it's losses in the drive motor. Fluid losses are probably minimal since flow rates are relatively low.
 

1. What is motor/pump fluid dynamics?

Motor/pump fluid dynamics is the study of how fluids (liquids or gases) behave when they are in motion in a motor or pump system. It involves the analysis of the forces and pressures that are exerted on the fluid and how these affect the performance of the motor or pump.

2. How do motor and pump design affect fluid dynamics?

The design of a motor or pump plays a crucial role in fluid dynamics. The size, shape, and placement of components such as impellers, blades, and vanes can impact the flow rate, pressure, and efficiency of the fluid. A well-designed motor or pump can minimize turbulence and maximize the transfer of energy to the fluid.

3. What are some common applications of motor/pump fluid dynamics?

Motor/pump fluid dynamics has a wide range of applications in industries such as manufacturing, transportation, and energy. It is used in hydraulic systems, cooling systems, and in the production of chemicals, food, and pharmaceuticals. It is also essential in the design and operation of engines, turbines, and pumps in vehicles and machinery.

4. How do you calculate the flow rate and pressure in a motor or pump system?

The flow rate and pressure in a motor or pump system can be calculated using the principles of fluid dynamics, including Bernoulli's equation and the continuity equation. These equations take into account factors such as the cross-sectional area, velocity, and density of the fluid, as well as the properties and geometry of the motor or pump.

5. What are some factors that can affect the efficiency of a motor or pump system?

The efficiency of a motor or pump system can be affected by various factors, including the type of fluid being pumped, the temperature and viscosity of the fluid, the speed and power of the motor, and the design and condition of the components. Other factors such as friction, cavitation, and leaks can also impact the efficiency of the system.

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