Pressure Energy
The pressure energy in an incompressible fluid volume, like a pressurized tank with water, can be expressed as
Δ E = Δp / ρ (1)
where
Δ E = potential energy (J/kg, Btu/lb)
Δ p = 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/m 3 the potential pressure energy can be calculated as
E = (106 Pa) / ( 1000 kg/m >3 )
= 1000 J/kg
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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