The Friction pressure drop in pipes an ducts represent the energy loss due to friction of fluid in a pipe or duct of constant Section. they are expressed in heights of fluid (Meters Column Fluid) or pascals .

D H is the loss of load meter column fluid

l is the loss coefficient of friction

V is the average speed flow
D is the diameter of the flow
L is the length of flow

CHARGE LOSS CALCULATION SOFTWARE

procedure for calculating pressure drop with the software MECAFLUX:

A new interface for calculating losses in pipes or duts list according duct flow was designed to help select the best compromise energy savings / cost of installation + equipment

The software calculates the loss of friction, but some information is mandatory, they seized in "the text box parameters"

• Enter diameter of pipe or duct (or equivalent diameter if the section is not circular ) In mm The Section of the pipe may be circular, oblong or rectangular, thus a window of calculating equivalent diameter is integrated into the setting of the duct

• Enter the flow in the chosen unit
• if the choice of units proposed is not enough you can use the converter integrated mecaflux
• Enter the pipe length in meters
• Select a fluid from the fluid 120 from the Fluid editor

• in Table viscosity you select a fluid and temperature , the dynamic viscosity will be given. (you can create, edit or record fluids in the fluids database )
• choose the matters of conduct and roughness will be automatically given

You can also opt for a duct spiral

   It'll just press " calculate loss of load " to compute pressure loss. (if a mandatory parameter is missing a message "insufficient parameters " will appears)

during the calculation:    

1. it may be offered to choose between two equations ,thus you can compare the different methods of calculation.

2. it may be offered to choose between two flow regimes when you are close to limit transition between laminar and turbulent flow. This transition is often in reality caused by defects roughness. (if you restart the calculation by slightly modifying the roughness you 'll switch to laminar or turbulent flow)

The results of calculations displayed in the "zone of results"

• The friction pressure loss expressed as heights column fluid (meters) , bars and pascals .
• the Section duct in m
• the average speed fluid in ms
• the maximum fluid velocity in ms
• the coefficient loss -- (unitless coefficient k)
• the type of flow
• The equation used
• the Reynolds number

The form results can be saved, printed or added to an existing file.

          L'inventaire des pertes de charges calculées vous permet d'additionner la perte de charges régulière de plusieurs calculs dans le cas de réseaux comportant des zones de conduits possédant des paramètres différents (matière de conduits, diamètres, températures)

in the case of networks with differents ducts , the inventory of pressure losses allow you to add the computed losses.

and insert for computing power of pump or turbine :

Mecaflux therefore uses an easy-friendly window, but also a spreadsheet for editing results as Inventory losses in the network and compute the pressure loss operating point for pump.