The head loss represent pressure losses, (or load losses) in the conduct of air systems, Hydraulic or other fluids.
Software interfaces for calculating major and minor head loss
The head loss evolve with the fluid velocity, at low fluid velocities, the head loss are low and at high speeds the pressure losses are high.The major pressure drop (major head loss) represent energy losses due to friction of the fluid in a conduit of constant section. They are expressed in fluid heights (in meters) and pascals.
DH is the loss of load, in meters fluid column
V is the average flow velocity in meters per second
D is the diameter of the flow, in meters
L is the flow (pipe) length, in metersl Is the Major head loss coefficient (unitless number) the coefficient of head loss is determined according to the flow regime
The equations used in the mecaflux software for the calculation of major head loss are:
calculation procedure with
- Pipe diameter (or equivalent diameter if the cross section is not round) mm.
- Flow in the selected unit.
- Length of the pipe in meters
- Select a fluid And in the viscosity chart , select a température
- Select a pipe material
- You may be offered a choice of two equations, the results are similar, but you can compare different methods of calculation.
- You may be offered a choice between two flow regimes when you are close to the limits of transition between laminar and turbulent flow.. This transition is often brought into reality by defects in roughness. (if you restart the calculation by slightly modifying the roughness you switch to a regime or another)
- the pressure drops are given in fluid heights (in meters) and pascals.
- the section of the conduit in m²
- the average fluid velocity in ms
- the maximum flow velocity in ms
- the coefficient of head loss (dimensionless coefficient )
- flow type
- Equation used
- Reynolds number
Minor head loss calculation: The minor head loss are pressure losses caused by the passage of the fluid in obstacles such as valves, fittings, enlargement, reservoir outlet. They are expressed in Pascals or columns fluid meters (m). They are treated in head loss tab , according to the element's parameters you choose.
- Procedure for calculating minor pressure drop with mecaflux standard
- select an minor loss element by choosing a "category" and select "element"
- fill in the fields with blue text in "Parameters" area
- click calculate