# Pressure Energy

## Pressure energy in a incompressible fluid

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The pressure energy in an incompressible fluid volume, like a pressurized tank with water, can be expressed as

*E = dp / ρ (1)*

*where *

*E = energy (J/kg)*

*dp = pressure difference (Pa, N/m ^{2})*

*ρ = density (kg/m ^{3})*

### Example - Pressure Energy in a Water Tank

The pressure on a water tank is *10 bar (10 ^{6} Pa)*. With density of water

*1000 kg/m*

^{3}the pressure energy can be calculated as

*E = (10 ^{6} Pa) / (1000 kg/m^{3}) *

* = 1000 J/kg*

## Related Topics

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- en: pressure energy
- es: energía de presión
- de: Druckenergie