New Features
Learn about new features in LINEAR software.
System Requirements
Learn more about the system requirements for using the LINEAR solutions.
Supported Norms and Standards
Learn which norms and standards support the LINEAR Solutions modules.
LINEAR Installation and Administration
Learn how to install, your LINEAR software, license and keep it up to date.
Getting Started
Get basic information about the structure, function, and interaction of the LINEAR Solutions programs in Revit and LINEAR Building.
Preparing Building
Learn how architects prepare plans and models to create a building model for building analysis.
Pre-Concept Design
Learn how to collaboratively localize and dimension equipment rooms and how to create pipeline corridor concepts.
Analyzing Buildings
Get information about the requirements analysis of a building. The demand analysis includes the calculation of the heat load, the cooling load and the ventilation concept.
Dimensioning Components
Learn how to dimension radiators, convectors, panel heating and concrete core activation systems on the basis of the requirements analysis in LINEAR Building and manufacturer-specific.
Inserting Components
Learn how to insert components from the LINEAR CAD Browser, from the libraries and configurators of the library tab or from LINEAR Building into the model.
Constructing Networks
Learn how to create pipe and duct networks, design slots and openings and manage discipline-related reports and tasks.
Calculating Networks
Learn how to calculate pipe and duct networks.
- Requirements for a Calculable Pipe- and Duct Network
  Explains the requirements for a calculable pipe and duct network.
- About Virtual Components
  Explains the concept of virtual components in pipe and duct network calculations.
- About Pipe Network Calculation Heating and Cooling
  Explains the concept of the pipe network calculation for heating and cooling.
  - Calculation
    Explains the concept of the calculation dialog in Pipe and Air Duct Network Calculations.
    - Details on the Heating and Cooling Calculation Dialog
      Information about the dialogs for Heating pipe network and Cooling pipe network.
      - About Results
        Explains the concept of the Results dialog in Pipe and Air Duct Network Calculations.
      - About Reports
        Explains the concept of the reports list in Pipe and Air Duct Network Calculations.
      - Details on Basic Conditions
        Information about the Basic conditions dialog in heating and cooling pipe network calculation.
      - About Visualization
        Explains the concept of visualization of calculation data and properties of pipe and duct networks.
      - Details on Flow Path Data
        Information about the Flow path data dialog in the pipe network calculation heating and cooling.
      - About Edit Section Part Data
        Explains the concept of editing section parts in Pipe and Air Duct Network Calculations.
      - Details on Define Section Parts
        Information on the Define section parts dialog in heating and cooling pipe network calculation.
      - Details on Lock/Unlock Section Parts
        Information about the Lock/unlock section parts dialog in pipe network calculation heating and cooling.
      - About Adjusting Nominal Diameters
        Explains the concept of adjusting nominal diameters in Pipe and Air Duct Network Calculations.
  - Settings
    Explains the concept of Settings in the Pipe and Air Duct Network Calculations.
  - Material data
    Explains the concept of the material data in the pipe network calculation for Heating, Cooling and Potable water.
  - Dwelling and Decentralized Fresh Water Stations
    Explains the concept of the dialog Dwelling and decentralized fresh water stations in pipe network calculation for heating.
  - Positioning
    Explains the concept of positioning for section parts in the heating and drinking water pipe network calculations.
  - Medium
    Explains the concept Medium in Pipe and Air Duct Network Calculations for heating, cooling and ventilation.
  - Components
    Explains the concept of the Components section in Pipe and Air Duct Network Calculations.
- About Pipe Network Calculation Potable Water
  Explains the concept of pipe network calculation in potable water.
- About Pipe Network Calculation for Waste Water
  Explains the concept of pipe network calculation in waste water.
- About Pipe Network Calculation for Gas
  Explains the concept of pipe network calculation gas.
- About the Air Duct Network Calculation
  Explains the concept of air duct network calculation.
- About Delete Warnings
  Explains the concept of Deleting warnings in Pipe and Air Duct Network Calculations.
Construction Design
Get information about the workflow Construction design in connection with pipe and duct networks.
Labeling
Learn how to label section parts and components in the model.
Output
Get information about material compilation in LINEAR Building. You will also learn how to print or export calculation results and material lists in your CAD program.
Troubleshooting
Get information about possible sources of errors when working with LINEAR Solutions.

Details on the Heating and Cooling Calculation Dialog

Information about the dialogs for Heating pipe network and Cooling pipe network.

The calculation dialog shows an overview of the detected pipe network and contains all functions necessary for the calculation.

You are here:

Project tab ➤ Discipline ➤ Analyse tab ➤ Calculation

Applies to: Heating, Cooling.

Functions for the calculation

The functions in the upper part of the calculation dialog pertain to the entire pipe network.


Element	Meaning
Calculate	Initiate the calculation of the pipe network after having made changes to see current calculation results.
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.
Result...	Displays additional information regarding the pipe network and an overview of the calculation results, which also are part of the printouts.
Report...	Displays an overview of notes and errors that occurred during calculation. The color of the button helps differentiate between notes and errors: white: No notes or errors. orange: There are notes on the calculation. red: 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.
Basic conditions...	Opens the dialog Basic conditions, which allows you to change basic calculation-parameters like specifications for hydraulic balancing, upper limits for max. velocities, max. pipe friction pressure gradient as well as settings for the dimensioning of thermostatic valves, regulating valves and differential pressure closed-loop controllers.
Visualization...	This function displays properties and calculation results of the pipe network in color in the model.
Labeling...	Label components and section parts with calculation results.
Refresh <	If components or section parts have already been labeled and calculation results have changed retrospectively, this button will refresh all labels with current data.
Adjust 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.

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 from the table and click Edit.... The dialog for editing components or section parts is opened.
edit in drawing <	This function is available in sections Section parts and Components. Select the element in your model after clicking edit in drawing <. 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.

Apply output data from Family parameters

If radiator families are used that are not from LINEAR but bring their own parameters for capacity and mass flow, these data can be used for the calculation. After clicking , you can choose to either assign capacity output or mass flow rate to their respective LINEAR parameter.

Pressure loss

Opens the dialog Flow path data in which pressure losses over the course of a flow path are shown in a graph.


Column	Description
No.	Flow path number.
Name	Name of the heat- or chill consumer.
L	Length of the flow path. Changes for length in the tables section parts and components take effect after the next calculation.
m	Mass flow rate of the heat- or chill consumer. The tooltip shows the component number and the power output of the consumer.
dpPipe	Pressure loss due to pipe friction.
dpFit	Pressure loss due to fittings (e. g. bends, t-pieces, reducing parts, transitions, manifolds).
dpValve	Pressure loss due to cv-values of valves (e. g. fixed resistors, shut-off valve).
dpConst	Constant pressure losses due to manually entered values (e.g. for radiators, heat exchanger).
dpContr	Pressure loss through 3-way control valves.
dpThrot	Pressure loss due to throttling valves (e. g. throttle valve, regulating valves).
dpTot	Pressure loss for the entire flow path.
dpPmp	Total pressure loss in flow path overcome by the pump. The tooltip displays the number of pumps.

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 theDN 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.

Built-in parts or fittings 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 section parts, e.g. in order to assign different pipe material or to create clear separations for the automatic assignment of material.


Column	Description
No.	Number of the section part.
Type	HSW: Supply water HRW: Return water SWHC: Supply water Heating/Cooling RWHC: Return water Heating/Cooling
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.
Q	Heat flow rate of this section part. The tooltip shows the simultaneity and the resulting heat flow rate.
m	Mass flow rate in this section part. The tooltip shows the simultaneity and the resulting heat flow rate.
DN	Nominal diameter of pipes in this section part. The Nominal 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.
T	Design operating temperature. The tooltip shows the operating temperature, the ambient temperature and the specific heat loss.
v	Mean flow velocity in this section part.
R	R-value in pipes.
dpR	Pressure loss due to pipe friction.
Sum zeta	Sum of zeta values in this section part.
dpZ	Pressure loss due to zeta value.
dpA	Pressure losses of adjustable appliances and valves.
dpTot	Sum pressure loss of this section part.

Table for components

This table shows the calculation data for all Components of the selected section part.


Column	Description
No.	Component number.
Name	Name of the component.
m	Mass flow rate of this component.
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.
DN	Dimension. VAR: Dimension varies.
Zeta	Zeta value of component.
dpZ	Pressure loss of this built-in part.
Cv	Flow coefficient.
dpKv	Pressure loss due to Cv value.
dpPipe	Pressure loss of this pipe.
dpA	Pressure loss by appliances.
dpTot	Total pressure loss of this component.

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