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# Pressure Energy

## Calculate the potential of pressure energy in a incompressible fluid.

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.

## Related Documents

• ### Energy Accumulated in Heated Water - kWh

The amount of thermal energy stored in heated water.
• ### Potential Energy - Hydropower

Elevation and potential energy in hydropower.
• ### Pressure

Introduction to pressure - online pressure units converter.
• ### Pressure Units - Online Converter

Convert between pressure units like Pa,  bar, atmosphere, pound square feet, psi and more.

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## Citation

• The Engineering ToolBox (2012). Pressure Energy. [online] Available at: https://www.engineeringtoolbox.com/pressure-energy-d_1822.html [Accessed Day Month Year].

Modify the access date according your visit.

4.10.13

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