Details on the Calculation Dialog for Siphonic Drainage (Roof Drainage)
Information about the dialog LINEAR Analyse Potable Water - Open drainage.
The calculation dialog shows an overview of the detected pipe network and contains all commands necessary for the calculation.
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Commands for the Calculation
The commands in the upper part of the calculation dialog pertain to the entire pipe network.
| Element | Meaning |
|---|---|
| Systems | If the project contains several systems or partial networks you may determine which of the systems or partial network to display in the calculation dialog’s tables. |
| ... | This button will open the technical data of the initial component. Here, you can change the system name shown in the drop-down list. |
| Hydraulic Balance | Enabled: Calculation is carried out immediately. The first step consists of dimensioning, the second of correcting volume flow rates until the resulting ΔpResid. disappears. Thereby one has a completely balanced system. If all dimensions of the system have been determined, the step for dimensioning is skipped and the volume flow rate is calculated. Disabled: The pipe network is dimensioned considering the available pressure, so far as pipe sections do not have fixed dimensions. The algorithm dimensions the network according to an available R-value and varies pipe sections until a ΔpResid. smaller than +/- 100 mb is reached. As soon as this goal has been achieved, the hydraulic load according to DIN 1986-100 is proven. It may very well happen, that a ΔpResid. smaller +/- 100 mb can not be maintained. |
 Calculate | Initiate the calculation of the pipe network after having made changes to see current calculation results. |
 Visualization ... | This command displays properties and calculation results of the pipe network in color in the drawing. |
 Results ... | Displays additional information regarding the pipe network and an overview of the calculation results, which also are part of the printouts. |
 Reports ... | Displays an overview of notes, warnings and errors that occurred during calculation. You can recognize the type of report by the color of the button: green check mark: No current notes, warnings or errors. blue i There are notes on the calculation. yellow warning triangle: There are warnings for the calculation. red cross: There are errors in the calculation. Note: It is recommended to always carefully read the reports to correct errors in the drawing and ensure a proper calculation. |
 Labeling ... | Label components and duct sections with calculation results. |
 Update < | If components or duct sections have already been labeled and calculation results have changed retrospectively, this button will refresh all labels with current data. |
Commands for the Tables
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Objects are displayed when selected from the lists in the project/model
Activated : The drawing highlights the objects that belong to the currently selected row in the table of Flow Paths, Pipe Sections, or Components. If necessary, the image will be zoomed in to ensure that the objects are visible.
Deactivated : No objects in the drawing that belong to the currently selected row in the table for Flow Paths, Pipe Sections, or Components are highlighted.
Similar commands are available in the sections Flow Paths, Pipe Sections and Components.
| Element | Description |
|---|---|
 ,  Maximize/minimize flow path list/pipe/duct section list/component list |
|
 Search < | The command is available in the Flow Paths, Pipe Sections and Components sections. After clicking Search < select the element in the drawing. The respective table then shows the flow path, the pipe section or the ventilation duct section. If a certain flow path number, a pipe section number or a ventilation duct section number needs to be found, enter the number into the text field and click Search <. The respective table then shows the flow path, the pipe section or the ventilation duct section. |
 Show | The command is available in the Flow Paths, Pipe Sections and Components sections. First, select the element from the table and click Show. The flow path, the pipe section or the ventilation pipe section is shown in the drawing. |
 Edit ... | The command is available in the Flow Paths, Pipe Sections and Components sections. First select the element in the table and click Edit .... The dialog for editing drainage element, pipe section or ventilation duct section is opened. |
 Edit < | The command is available in the Pipe Section, and Components sections. After clicking Search < select the element in the drawing. The dialog for editing pipe sections is opened. |
| Edit component< | The command is available in the section Components. After clicking Edit Component < select the component in the drawing. The dialog for editing the component is opened. |
Table for Flow Paths
This table shows the calculation data for all flow paths of the selected system. It provides an overview over all ending components of the network. If you select a flow path, the table Pipe Sections displays all corresponding pipe sections. The most unfavorable flow path is highlighted in a different color. You can also select the most unfavorable flow path by pressing U.
Drain, eccentric
This command allows you to regulate and control the usage of eccentric transitions. To equip specific flow paths with eccentric transitions, mark the flow path in the table and click Edit. In the technical data of the roof drain you can activate the checkbox Use eccentric transitions.
Enabled: All pipe sections will use eccentric transitions.
Disabled: All pipe sections will use concentric transitions.
| Column | Description |
|---|---|
| (without title) | Pipe Type: R: Rain Water |
| No. | Flow Path Number. |
| Drain outlet / Roof area | Name of the roof drain or the gutter and corresponding roof area |
| L | Length of the flow path. |
| A | Roof area part of the roof drain. |
| Qr | Drain capacity (target- or actual volume flow rate). |
| ΔAvail | Geodetic pressure recovery. |
| ΔpTot | Pressure loss of pipe section in this flow path. |
| ΔpResid | Error pressure difference of flow path. |
Table for Pipe Sections
By default, the table displays the calculation data for all pipe sections included in the selected flow flow path. When maximized, all sections of the entire system are displayed. If you select a pipe section, the table Ventilated via Pipe Section(s) displays all corresponding ventilation pipe sections.
Split selected section part
Enables the division of a pipe section and inserts a reducer. This command is useful if you would like to use different materials or nominal diameters for a pipe section.
Unlock / Lock Pipe Sections
This command allows you to fix or unfix the dimensions of all pipe sections. If values are displayed in bold in theDN column, the dimension of the respective pipe sections will not be adjusted during the calculation. This is sensible when calculating existing systems. If the dimensions of some pipe sections have been fixed already, you will be asked whether to fix or unfix all pipe sections.
| Column | Description |
|---|---|
| (without title) | Pipe Type: R: Rain Water |
| No. | Number of the duct section. |
| Type | DP: Down Pipe G: Underground Drainage Pipe ColP: Collector Pipe S: Collecting Pipe SCP: Single Connector pipe (i): inside the building (o): outside the building Pipe type can be changed in the table. |
| L | Length of pipe section. The length be changed in the table. The new length will be distributed among all ducts of the duct sections proportionately to constructed length. All pipes affected by the change in length will be displayed bold in the tables for duct sections and components. |
| H | Height of pipe section. |
| DN | Nominal diameter of pipes in this pipe section. The nominal diameter can be changed in the table. The value is then fixed and will not be adjusted by the software during calculation. Fixed values are shown in bold. |
| Qr | Rainwater Discharge Rate |
| w | Mean velocity. |
| R | R-value / pressure loss gradient |
| ∑ζ | Sum of zeta values due to single resistances. |
| Z | Pressure loss in mbar from velocity and zeta value. |
| R*L | Pressure loss due to pipe friction in this pipe section. |
| ΔpTot | Total pressure loss in this pipe section. Sum of R * L + Z. |
| pStat | Static pressure in mbar at the end of a pipe section calculated according to the law of the Bernoulli energy conservation equation. |
Table for Components
By default, the table displays the calculation data for all components belonging to the selected section. When maximized, all components of the entire system are displayed.
| Column | Description |
|---|---|
| No. | Component number. |
| Name | Name of the component. |
| L | Length of the component. |
| DN | Nominal diameter of the component. |
| Qr | Rainwater Discharge Rate |
| w | Mean velocity in this pipe section. |
| R | R-value / pressure gradient |
| ζ | Zeta value of the single resistance. |
| Z | Pressure losses due to single resistances. |
| R*L | Pipe friction pressure loss due to single resistances. |
| ΔpTot | Total pressure loss of this component. Sum of R * L + Z. |
Generate 3D Pipes
Allows the assignment of pipe materials from the 3D Piping module after the calculation of a single-line pipe network. After successful assignment, a three-dimensional pipe network is generated. Pre-assigned insulation material is considered. This process requires a license for the LINEAR 3D Design Pipe&Power module.