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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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Project tabDiscipline potable waterAnalyse tabCalculation

Dialog calculation potable water Linear Revit

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 section part with its discharge valve. You can adjust simultaneities and the building type for individual section parts in this dialog.

Labeling ...

Label components and section parts with calculation results.

Update <

If components or section parts have already been labeled and calculation results have changed retrospectively, this button will refresh all labels with current data.

Functions of the tables

In sections Flow paths, Section parts and Components, similar functions are presented.

Element

Description

Maximize list

The tables for flow paths, section parts and components can be maximized to fit the entire calculation dialog. The other tables are hidden.

Minimize list

This function minimizes a maximized table. The other tables are displayed again.

Search <

This function is available in sections Flow paths, Section parts and Components. After clicking Search < select the element in the model. The respective table then highlights the flow path, the section part or the component.

If a certain flow path number, a section part 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 section part or the component.

Show

This function is available in sections Flow paths, Section parts and Components. First, select the element from the table and click Show. The flow path, the section part or the component is shown in the model.

Edit...

This function is available in sections Flow paths, Section parts and Components. First, select the element in the table and click Edit.... The dialog for editing components or section parts is opened.

Edit <

This function is available in sections Section parts and Components. After clicking Edit in drawing, select the element in the model. The dialog for editing components or section parts 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 Section parts displays all corresponding section parts. 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

Consumer

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.

dp(Geo)

Pressure loss due to geodetic height.

Z

Pressure loss due to zeta value.

R*L

Pressure loss due to pipe friction.

dp(A)

Pressure loss by appliances (e. g. filter, meter) and valves.

dp(Pmp)

Pressure recovery due to pumps.

Surplus

Amount of minimum flow pressure surplus for discharge valve.

Table for section parts

This table shows the calculation data for all section parts of the selected flow path. If you select a section part, the table Components displays all corresponding components.

Apply section part data globally

Opens the dialog Define section parts. This function allows you to assign or reset certain properties of selected or all section parts.

Unfix / fix section parts

This function allows you to fix or unfix the dimensions of all section parts. If values are displayed in bold in the DN column, the dimension of the respective section parts will not be adjusted during the calculation. This is sensible when calculating existing systems. If the dimensions of some section parts have been fixed already, you will be asked whether to fix or unfix all section parts.

Column

Description

No.

Number of the section part.

Type

Pipe type

PWC: Potable Water Cold

PWH: Potable Water Hot

PWH-C: Potable Water Hot ­ Circulation

DN

Nominal diameter of pipes in this section part. 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 section part. The length be changed in the table. The new length will be distributed among all pipes of the section parts proportionately to constructed length. All pipes affected by the change in length will be displayed bold in the tables for section parts and components.

H

Height of section part

U

Number of individuals ( if calculated according to SP 30.13330.2016 and SP 30.13330.2020)

N

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)

Sum 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.

v

Medium velocity.

Sum zeta

Sum of zeta values in this section part

Z

Pressure loss due to zeta value

R

R-value of the pipes

R*L

Pressure loss due to pipe friction

dp(A)

Pressure loss by appliances (e. g. filter, meter) and valves

dp(Tot)

Total pressure loss of this section part

dp(Geo)

Pressure loss due to geodetic height

dp(Stat)

Static pressure difference

dp(Resid.)

Residual pressure at the end of a section part

Table for components

The table shows the calculation data of all components contained in the selected section part.

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 section parts containing the respective pipe. All pipes affected by the change in length will be displayed bold in the tables for section parts and components.

Zeta

Zeta value.

Z

Pressure loss due to zeta value.

R*L

Pressure loss due to pipe friction.

dp(A)

Pressure loss by appliances (e. g. filter, meter) and valves.

dp(Tot)

Total pressure loss.

dp(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.