Pressure energy, also known as flow energy, is calculated as the product of pressure and volume. More commonly, it is expressed as pressure per unit volume or mass.
Here's a breakdown of how you calculate pressure energy:
-
*Pressure Energy (E) = P V**
- Where:
- P = Pressure (typically in Pascals (Pa) or N/m2)
- V = Volume (typically in m3)
- Where:
-
Pressure Energy per Unit Mass = P/ρ
- Where:
- P = Pressure (typically in Pascals (Pa) or N/m2)
- ρ = Density (typically in kg/m3)
- Where:
Explanation:
Pressure energy represents the work required to move a fluid element across a boundary against the pressure. It's an important concept in fluid mechanics and thermodynamics.
Example:
Imagine a fluid under a pressure of 100,000 Pa with a density of 1000 kg/m3. The pressure energy per unit mass would be:
Pressure Energy per Unit Mass = 100,000 Pa / 1000 kg/m3 = 100 J/kg
In Summary: Pressure energy is calculated as the product of pressure and volume (P*V). A more practical expression often used is the pressure energy per unit mass, which is calculated as pressure divided by density (P/ρ).
