Sections (Circulation Simulation)

The ‘Sub-sections’ window is a dynamic tabular overview of the sub-sections within a specific circulation loop.

The bidirectional link between the drawing and that the currently selected section in the drawing is selected simultaneously and in the table is selected simultaneously. In the flow path highlighted in orange, the selected section located there is highlighted in blue.

  • Right-click in the table to access further sub-options.

    Show/hide columns:

    You can show and hide columns. After selecting the Show/hide columns function, the Select columns dialogue box appears. By checking or unchecking the respective boxes in the Select columns dialogue, you can manually adjust the displayed contents of the segment window.

    Load standard layout:

    If you select this option, your view is reset to the delivery status.

    Export to Excel:

    After selecting the storage location in the Save as dialogue, the displayed contents of the sections are saved in an Excel file in xlsx format.

  • If you move the mouse over the individual column headers in the table, a help text with further information on the respective column is displayed.
Table 1. Columns in the ‘Sub-sections’ window
Column heading Explanation of the individual columns Physical unit
Medium Specifies the medium of the selected section. -
No. Specifies the section number of the selected section. -
l Indicates the length of the section. [m]
V̇ Indicates the actual volume flow in the selected section. [l/h]
k Indicates the pipe roughness in the selected section. [mm]
da Specifies the outer diameter of the pipe in the selected section. [mm]
sR Specifies the wall thickness of the pipe in the selected section. [mm]
di Specifies the internal diameter of the pipe in the selected section. [mm]
v Specifies the mean Flow velocity in the selected section. [m/s]
Re Indicates the Reynolds number within the selected section.
R Specifies the pipe friction pressure drop per metre of pipe in the selected section. [hPa/m]
l*R Specifies the total pressure losses due to pipe friction in the selected section. [hPa]
Σζ Indicates the sum of the resistance coefficients in the selected section. -
Z Indicates the pressure loss of the fittings in the selected section. [hPa]
l*R+Z Indicates the total pressure loss resulting from pressure losses due to pipe friction and the fittings in theselected section. [hPa]
ΔpApp Indicates the total pressure losses of all fittings in the selected section. [hPa]
ΔpTh. Ventile Indicates the total pressure losses of all thermostatic control valves in the selected section. [hPa]
ΔpVentile Indicates the total pressure drop across all static control valves in the selected section. [hPa]
Δp Indicates the total pressure losses in the selected section. [hPa]
sD Indicates the thickness of the insulation layer in the selected section. [mm]
λD Specifies the thermal conductivity of the insulation in the selected section. [W/m*K]
λR Specifies the thermal conductivity of the pipe in the selected section. [W/m*K]
D Specifies the external diameter of the insulated pipe in the selected section. [mm]
ϑW Specifies the medium temperature in the selected section. °C
ϑL Indicates the ambient temperature of the selected section. °C
Δϑ Indicates the temperature difference between the medium and the ambient temperature in the selected section. K
Q̇W Indicates the heat loss per metre of pipe in the selected section. W
ΔϑTS Indicates the temperature difference resulting from the temperature drop along the selected section. K
ϑPWH Specifies the initial temperature in the selected section. °C