2. THEORETICAL FOUNDATIONS

2.2 Energy balance

We will make the energy balance between points 1 and 2. As shown in the drawing, you must take into account the height (z) depending on the level hydraulic (nh).

- If there is a pump installed between points 1 and 2 and the fluid is real.

- The above energy balance can be given in units of height and then we have the Bernoulli equation:

Where:

Ef = energy due to friction (J/s).

G = volumetric flow (m³/s).

g = gravity (m/s²).

hF = pressure losses(m).

m = mass flow (kg/s).

P = internal pressure (Pa).

S = section perpendicular to the passage of fluid (m²).

u = linear velocity of the fluid (m/s).

Wmec =mechanical energy (J/s).

z = height (m).

ρ = density of the fluid (kg/m³).