LINEAR Solutions 26 for Revit

Details on "Calculation Parameters” "in the "Settings” (Potable Water)

Information on the Calculation Parameters tab in the Settings dialog in the Pipe Network Calculation Potable Water.

On this tab, you make global settings for the calculation and define the calculation method and threshold values. The settings are saved with the project. Exceptions are noted accordingly.

Tip: Clicking on the unit of a parameter opens a context menu where you can adjust the unit used, the number of decimal places, and the formatting (decimal, fraction).

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Project tab ➤ Disciplines … ➤ Potable Water ➤ Analyse tab ➤ Settings … ➤ Calculation Parameters

Calculation parameters tab in the settings for potable water in the LINEAR Solutions for Autodesk Revit

Calculation Method

Select the calculation method to be used for calculation. Depending on the calculation method, some parameters and settings may change or may not be available. The following calculation methods are available:

  • DIN 1988-3

  • DIN 1988-300/EN806

  • Vewin Werkbladen 2.1

  • SVGW W3

  • SP 30.13330. 2016 and SP 30.13330. 2020

  • ÖNORM B 2531 2531

  • PN 92 / B-1706

Type of Building

Available building types depend on the selected calculation basis. Select the building type to be used when determining peak flow rates within the network. This global setting can over the course of the calculation be manually changed for particular sections of the network.

For DIN 1988-300/EN 806, DIN1988-3 and ÖNorm B 2531:

If you selected Special Building, the network will be calculated using simultaneities. The initial setting for all pipe sections is a simultaneity of 100 %, which can be manually adjusted using the button Peak Flow Rate ... in the calculation dialog.

For SP 30.13330.2016 and SP 30.13330.2020:

Some building types do not consider hot water pipes.. If hot water pipes have been constructed anyway, an error message is issued in the report.

For each building type, calculated flow rates are stored, whose information can be viewed by clicking the button . If you select Special Building (User Values) as the building type, you can use the button to create the corresponding consumption values for this building yourself. Click the button to open the dialog Manage Custom Building Types, where you can create and manage any number of custom building types. This data is stored in a separate file and is therefore available to you in all other projects.

For PN 92 / B-1706:

Peak flow rates are stored for the predefined building types that you can select from the drop-down list. Using the button, you can create and manage any number of custom building types, specifying the coefficients for calculating the peak flow according to the specified standard. The building types you create are saved in the project and are then available for selection in the drop-down list for selecting the building type.

Global Usage

Only available for the calculation methods DIN 1988-300/EN 806 and ÖNorm B 2531 and defines the comfort level valid for the entire project. The selection of the comfort level is required for the determination of the ejection times according to VDI 6003.

Pressure Loss Calculation acc. to

Indicates the basis on which the pressure loss calculation is performed.

Calculate Ejection Time, Test Temperature, Test Time

Enabled: During calculation, ejection times for hot water consumers are determined. Select Custom to specify your own values for the test temperature and the test time. When calculating the ejection time according to VDI 6003, you have to select a comfort level in the calculation parameters. For component types not covered by VDI 6003, you can specify the desired Testing Temperature and Test Time manually. In the output, you will find the calculated values under the print topic Discharge Time.

In calculation methods SP 30.13330.2016 and SP 30.13330.2020, the discharge time is not calculated and the range is not displayed.

Units

Units ...: Opens a selection menu where you can choose from various predefined unit schemes. You can also open the Units Settings dialog, where you can customize the schemes and create your own schemes. The specified units for the various values are used in all dialogs for technical data of components, in the calculation dialog, in the results, and in printouts.

Potable water temperature (PWC)

Most calculation methods specify a reference temperature of 10 °C for calculating the fluid properties for potable water (cold). Enter a different number if a deviating temperature is to be used for calculation.

Ambient Temperatures (Global)

If necessary, adjust the values for the global ambient temperatures assigned to the pipe sections. The values are used for the functions of the dialog Ambient temperatures (Project tab ➤ Discipline Potable Water ➤ Analyse tab ➤ Hygiene Functions ➤ Ambient Temperatures ...).

Cold Water: Sets the ambient temperature for all cold water sections. The default value according to the standard is 25 °C.

Hot Water: Sets the ambient temperature for all hot water and circulation sections. The default value according to the standard is 10 °C.

Tip: In the Ambient temperature dialog, you can assign different ambient temperatures to individual sections.

Calculation Specifications (Check Boxes)

Check box

Description
Detect Material with Every Calculation

Enabled: The material is recalculated for each calculation. Material detection is necessary, for example, for creating parts lists and assigning component connections.

Disabled: The material is not detected during calculation. For large project where changes in material are not to be expected, this can shorten calculation time. If the checkbox is unchecked and you want to create printouts using the Output... function, you will be asked whether the material should be detected.

These settings are not saved in your project but in an external configuration file and will be applicable to all potable water projects.
Output Manufacturer-neutral Material

Enabled: When issuing parts lists, manufacturer components are listed without the manufacturer name and without the item number in the neutral components section. If you change this option, you must recalculate the network before reissuing it.
Printout Pipe Material per Pipe Type

Enabled: Pipe material for cold water, hot water and circulation are printed separately in parts lists.

These settings are not saved in your project but in an external configuration file and will be applicable to all potable water projects.
Highlight Most Unfavorable Flow Path

This option is not available in LINEAR Solutions for Revit.

Tip: Instead, use the visualization function to display the most unfavorable flow paths in the model (Analyse tab ➤ Visualization ... ➤ Calculation ➤ Most Unfavorable Flow Paths (Row 15) ➤ Display).
Collect Room Book Data

Enabled: If you have assigned rooms to appliances using the function Location ..., you can print out a Room Book after the calculation via Output ....
Heat Interface Unit: Apply Design Flow Rate

Enabled: To calculate pressure loss for manufacturer specific heat interface units, the flow rate from the dimensioning of the heat exchanger is used. Flow rate for this heat interface unit is still method-specific.

Disabled: To calculate pressure loss for manufacturer specific heat interface units, the flow rate based on the method for pressure loss calculation will be used.