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Pressure Energy

Calculate the potential of 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

Δ E = Δp / ρ                                (1)


Δ E = potential energy (J/kg, Btu/lb)

Δ p = pressure difference (Pa (N/m 2 ), lb/ft 2 )

ρ = density of fluid (kg/m 3 , lb/ft 3 )

Example - Pressure Energy in a Water Tank

The pressure in a water tank is 10 bar (10 6 Pa) . With density of water 1000 kg/m 3 the potential pressure energy can be calculated as

E = (10 6 Pa) / ( 1000 kg/m > 3 )

= 1000 J/kg

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Related Topics

  • Fluid Mechanics

    The study of fluids - liquids and gases. Involving velocity, pressure, density and temperature as functions of space and time.

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