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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

ΔE = Δp / ρ                                (1)


ΔE = potential energy (J/kg, Btu/lb)

Δp = pressure difference (Pa (N/m2), lb/ft2)

ρ = density of fluid (kg/m3, lb/ft3)

Example - Pressure Energy in a Water Tank

The pressure in a water tank is 10 bar (106 Pa). With density of water 1000 kg/m3 the potential pressure energy can be calculated as

E = (106 Pa) / (1000 kg/m3)

   = 1000 J/kg

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