Details on the Calculation Dialog for Potable Water
Information on the dialog LINEAR Analyse Potable Water Revit.
The calculation dialog shows an overview of the detected pipe network and contains all functions necessary for the calculation.
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Functions for the Calculation
The functions 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. The discipline potable water differentiates between the potable water- and the circulating pipe system. |
| ... | This button will open the technical data of the initial component. Here, you can change the system name shown in the drop-down list. |
 Calculate | Initiate the calculation of the pipe network after having made changes to see current calculation results. |
 Visualization ... | This function displays properties and calculation results of the pipe network in color in the model. |
 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. |
 Peak Flow Rate ... | Opens the dialog Peak Flow Rate, showing a detailed calculation of the peak flow rate of the selected pipe section with its discharge valve. You can adjust simultaneities and the building type for individual pipe sections in this dialog. |
 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. |
Functions of the Tables
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Objects are displayed when selected from the lists in the project/model
Activated : The model 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 model that belong to the currently selected row in the table for Flow Paths, Pipe Sections, or Components are highlighted.
Similar Functions are available in the sections Flow Paths, Pipe Sections and Components.
| Element | Description |
|---|---|
 ,  Maximize/minimize flow path list/pipe/duct section list/component list |
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 Search < | This function is available in sections Flow Paths, Pipe Sections and Components. After clicking Search < select the element in the model. The respective table then highlights the flow path, the pipe section or the component. If a certain flow path number, a pipe section number or a component number needs to be found, enter the number into the text field and click Search <. The respective table then highlights the flow path, the pipe section or the component. |
 Show | This function is available in sections Flow Paths, Pipe Sections and Components. First, select the element from the table and click Show. The flow path, the pipe/duct section or the component is shown in the model. |
 Edit ... | This function is available in sections Flow Paths, Pipe Sections and Components. First select the element in the table and click Edit .... The dialog for editing the component or pipe/duct section opens. |
 Edit < | This function is available in sections Pipe Sections and Components. After clicking Edit in Drawing, select the element in the model. The dialog for editing the component or pipe/duct section opens. |
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.
| Column | Description |
|---|---|
| No. | Flow Path Number. |
| Type | Pipe type. PWC: Potable Water Cold PWH: Potable Water Hot PWH-C: Potable Water Hot Circulation |
| Appliance | Name of the consumer. |
| H | Height of the flow path. |
| Consider peak flow rate | Shows, whether the peak flow rate of a consumer is considered or not. The setting for the peak flow rate can be changed in the technical data of the consumer. |
| Q(r) | Calculation flow rate cold water or hot water. |
| p(Min,SP) | Minimum supply pressure at network starting point. |
| p(Min,Fl) | Minimum flow pressure. |
| Δp(geo) | Pressure loss due to geodetic height. |
| Z | Pressure loss due to zeta value. |
| R*L | Pressure loss due to pipe friction. |
| Δp(A) | Pressure loss by appliances (e. g. filter, meter) and valves. |
| Δp(pmp) | Pressure recovery due to pumps. |
| Surplus | Amount of minimum flow pressure surplus for faucet. |
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 duct section, the table Components displays all corresponding components.
In pipe systems, changes in material or components can be classified as section separators.
This function allows you to classify fittings or built-in parts in the pipe network as separating elements for pipe sections, e.g. in order to assign different pipe material or to create clear separations for the automatic assignment of material.
Apply Pipe/Duct Section Data Globally
Opens the dialog Define Pipe Sections. This function allows you to assign or reset certain properties of selected or all pipe sections.
Unlock / Lock Pipe Sections
This function 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 |
|---|---|
| No. | Number of the pipe section. |
| Type | Pipe Type PWC: Potable Water Cold PWH: Potable Water Hot PWH-C: Potable Water Hot Circulation |
| 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. Dimensions listed with an asterisk in the drop-down list have been disabled in the pipe tables. If special dimensions are to be used specifically, the deactivated dimensions are also available for selection here. |
| 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 |
| I | Number of individuals (if calculated according to SP 30.13330.2016 and SP 30.13330.2020) |
| S | Number of sanitary (if calculated according to SP 30.13330.2016 and SP 30.13330.2020) |
| P | Probability of use (if calculated according to SP 30.13330.2016 and SP 30.13330.2020). |
| NP | Product of the number of sanitary objects and the probability of use ( if calculated according to SP 30.13330.2016 and SP 30.13330.2020). |
| α | Simultaneity factor ( if calculated according to SP 30.13330.2016 and SP 30.13330.2020) |
| ∑Q(r) | Sum of calculation flow rates |
| Q(s) | Peak flow rate and continuous flow rate. The tooltip show, whether the peak flow rate was determined by usage unit, by curve or after a comparison of curve and usage unit. |
| w | Medium velocity. |
| ∑ζ | Sum of zeta values in this pipe section |
| Z | Pressure loss due to zeta value |
| R | R-value of the pipes |
| R*L | Pressure loss due to pipe friction |
| Δp(A) | Pressure loss by appliances (e. g. filter, meter) and valves |
| Δp(tot) | Total pressure loss of this pipe section |
| Δp(geo) | Pressure loss due to geodetic height |
| Δp(Stat) | Static pressure difference |
| Δp(resid) | Residual pressure at the end of a pipe section |
Table for Components
By default, the table displays the calculation data for all components included in the selected section. When maximized, all components of the entire system are displayed.
| Column | Description |
|---|---|
| No. | Component number. |
| Name | Name of the component. |
| DN | Dimension. |
| L | For pipes: Length. The length be changed in the table. The new length will be used in all pipe sections containing the respective pipe. All pipes affected by the change in length will be displayed bold in the tables for duct sections and components. |
| ζ | Zeta value. |
| Z | Pressure loss due to zeta value. |
| R*L | Pressure loss due to pipe friction. |
| Δp(A) | Pressure loss by appliances (e. g. filter, meter) and valves. |
| Δp(tot) | Total pressure loss. |
| Δp(pmp) | Pressure recovery due to pumps. |
Adjusting Nominal Diameters
If calculated nominal diameters deviate from those constructed, calculated nominal diameters can be transferred into the model. You can adjust the nominal diameters for the entire network or for partial networks.