Details on Dimensioning in Basic Conditions
Information about the section Dimensioning in the Basic conditions dialog in the Pipe Network Calculation Heating.
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Applies to: Heating and Cooling.
Select if the calculation process is supposed be carried out according to maximum velocity, maximum pipe friction pressure gradient or maximum pipe friction pressure gradient dependent on the nominal diameter. The maximum velocity and the maximum pipe friction pressure gradient may be used at the same time.
If dimensioning is done according to maximum velocity and maximum pipe friction pressure gradient and one of the limit values is exceeded in a pipe section, the program automatically selects the next greater dimension.
If a pipe section has been assigned different limit values for maximum velocity and maximum pipe friction pressure gradient using command is Pipe section data or Editing pipe section data via drawing, these individual limit values have priority over settings specified in the Basic conditions dialog.
Max. velocity
Enabled: During dimensioning, limit values from the fields Max velocity and Max velocity in radiator connection pipes is used. The limit value Max. velocity is valid for all pipe sections except for radiator connection pipes. If the limit value for maximum velocity is exceeded in one pipe section, the next greater dimension is selected by the program.
Disabled: Dimensioning is carried out considering only pipe friction pressure gradients.
Max velocity in radiator connection pipes
Enter a separate limit value for maximum velocity in radiator connection pipes. It will be used if the checkbox Max velocity is active. If the limit value for maximum velocity is exceeded in a radiator connection pipe, the next greater dimension is selected by the program.
Max. pipe friction pressure gradient
Enabled: During dimensioning, the provided limit value for maximum pipe friction pressure gradient is used.
Max pipe friction pressure gradient dependent on the nom. diameter
Enabled: In the fields from DN and to DN, enter the nominal diameter range, within which the maximum pipe friction pressure gradient is valid.
Global pressure loss for fittings and joining pieces
The percentage of pipe pressure loss used to calculate pressure losses for fittings and jointing pieces. If 0 % is entered, the zeta values of the constructed form and connection pieces are used in the drawing.