Energy flow in mechanics

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How can energy be transported in a hydraulic circuit? The volume of oil is nearly incompressible. Therefor energy can not be transported in the form of potential (inner) energy of the oil.
 

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  • #2
Bystander
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PΔV.
 
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Incompressible doesn't mean that there can't be any change in pressure, it just means that the density doesn't change.
 
  • #4
Jano L.
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How can energy be transported in a hydraulic circuit? The volume of oil is nearly incompressible. Therefor energy can not be transported in the form of potential (inner) energy of the oil.
Internal energy change of liquids after pressure is increased is negligible. The energy from the source (motor) is transported to the load by work of the liquid in contact with the load when the surface of contact moves. If it does not move, there is no transport of energy.
 

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