Knowledge Base AutoCAD
Analyzing Buildings
Get information about the demands analysis of a building with LINEAR Building. The demands analysis includes the calculation of the heat load, the cooling load and the determination of the required air volumes.
Cooling Load Short Procedure
Learn how to calculate a cooling load for your building based on the short procedure of VDI 2078 (1996), section 6.
About Internal Loads
Explains the concept of internal loads in the context of cooling load calculations using the short procedure.
Details on Internal Loads
Information on the Internal Loads section when calculating the cooling load at room level by the abbreviated method.

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 AutoCAD and LINEAR Building.
Preparing and Editing Buildings and Architecture
Learn how to prepare drawings provided by an architect to create an architecture for building analysis.
Analyzing Buildings
Get information about the demands analysis of a building with LINEAR Building. The demands analysis includes the calculation of the heat load, the cooling load and the determination of the required air volumes.
- About Building Detection
  Explains the concept of building detection in LINEAR Building from a connected CAD program.
- Heat Load
  Select a calculation method for the calculation of the heat load according to the location and requirements of your project.
- Cooling Load Short Procedure
  Learn how to calculate a cooling load for your building based on the short procedure of VDI 2078 (1996), section 6.
  - About the Short Procedure of Cooling Load Calculation
    Explains the concept of implementation of the short procedure of cooling load calculation of LINEAR.
  - About Climate Data
    Explains the concept of climate data in the cooling load calculation using the short procedure.
  - Configure Project-Wide Solar Shading
    Shows step-by-step how to configure uniform solar shading for all exterior windows in your project.
  - Details on Shading Device/Clouding
    Information on Solar Device/Clouding in the General Cooling Load Data section.
  - Details on Type of Building/Constr. Type
    Information on the Type of Building/Constr. Type section in the General Cooling Load Data.
  - About Room Groups
    Explains the concept of room groups in the context of cooling load calculations using the short procedure.
  - Details on Overview: Structural level
    Information on the overview of individual structural levels in the abbreviated method for calculating the cooling load.
  - Details on Room Data
    Information on the Room data section when calculating the cooling load by the abbreviated method.
  - About Internal Loads
    Explains the concept of internal loads in the context of cooling load calculations using the short procedure.
    - Assigning internal loads to room groups
      Shows step-by-step how you assign internal loads to a room group on project level.
    - Details on Internal Loads
      Information on the Internal Loads section when calculating the cooling load at room level by the abbreviated method.
    - Details on Individuals, Lighting and Machinery
      Information on the Individuals, Lighting and Machinery in the Edit Room Groups section.
  - About Results
    Explains the concept of display of results in the cooling load calculation using the short procedure.
  - Details on Classes of Construction
    Information on the Classes of Construction dialog at room level in the Room Data section.
- Cooling Load, dynamic
  Select a method for determining the cooling load to suit the location and requirements of your project.
- Ventilation
  Explains the concept of determining air volumes for residential and non-residential buildings.
Dimensioning Components
Learn how radiators, convectors, panel heating/cooling systems and concrete core activation systems and components of ventilation systems are designed based on the requirement analysis in LINEAR Building.
Create Pipe Run Scheme
Learn how to create pipe run schemes for pipe networks in LINEAR Building.
Calculate Pipe Run Schemes
Learn how to calculate pipe run schemes in LINEAR Building.
Inserting Components
Learn how to transfer radiators or chilled beams to a LINEAR Building connected CAD platform and insert symbols and components from the libraries into CAD.
Drawing Networks
Learn how to draw pipe and duct networks, connect components, generate schemes, and create slots and openings.
Calculating Networks
Learn how to calculate pipe and duct networks.
Automatic labeling and dimension
Learn how to label components and sections in your drawing and how to dimension your drawing.
Output
Get basic information on output to the LINEAR Solutions for AutoCAD. for output to LINEAR Building and print mask editor.

Details on Internal Loads

Information on the Internal Loads section when calculating the cooling load at room level by the abbreviated method.

In this dialog, you enter the internal cooling loads for the current room caused by persons, lighting, machinery and material throughput.

You are here:

Module Overview ➤ Cooling Load/Abbreviated Method ➤ Room Level ➤ Internal Loads

Cooling load inner loads Linear Building

General Room Data

The upper part of this view shows the room number, the room name, the set room temperature for cooling and the dimensions of the room (the latter not in cases where only the area was given). The room number and room name can be edited directly. The temperature is adopted from the Room Data section and shown here. The room dimensions can be adjusted by clicking on .

Persons


Column	Description
Number	Number of persons in this room. If the value of this field has been set at project level, it is shown in bold.
Number per m²	Number of individuals per square meter. The number of individuals is calculated dependent on the size of the room. If the value of this field has been set at project level, it is shown in bold. If you overwrite the value from project level at room level, the value at project level is set to zero. The original value in the remaining rooms of the room group is unchanged.
Presence Time	Dropdown list to select the period of time people are in the room.
Level of Activity	Dropdown list to select the activity level of the persons in this room. A higher activity level results in a higher heat emission.
Total Heat Emission	Total amount of heat emitted by people in this room.
Dry Heat Emission	Dry fraction of heat emitted by people in this room.
Humid Heat Emission	Humid fraction of heat emitted by people in this room.
Water Vapor Emission	Water vapor emission in g/h by people in this room.

Lighting


Column	Description
Total Lighting Output	Total lighting capacity of the internal load in watts.
Lighting Output W/m²	Lighting capacity per square meter from the internal load. If you populate this field, the Total lighting capacity field is set to zero. The absolute lighting capacity is determined for each room individually, dependent on the room size.
Simultaneity Factor	Factor for the simultaneity of the lighting activity.
Operating Time	Dropdown list for selecting the period in which the lighting is on.
Convective Fraction	Part of the internal load that is output as a convection directly to the air in the room inside the set operating time.
Exhaust	Dropdown list for selecting the type of extraction. If an extraction system is selected, the program calculates a corresponding room load level dependent on the air throughput.
Air Throughput	Air exchange that is set on the basis of the set extraction in the room per unit time.
Load Level	If an extraction system is selected, a load level from VDI 2078 Table A4 is set automatically.

Machinery


Column	Description
Total Machinery Power	Total output from machinery for this internal load.
Machinery Power W/m²	Capacity per square meter from machinery. If you populate this field, the Total machinery power field is set to zero. At room level, the actual machinery capacity is calculated individually, dependent on the room size.
Rated power (shaft power)	The nominal output of the machinery in the selected room group. Reference values for the heat emission of machines and devices are given in tables A6.1 and A6.2 of VDI 2078.
Average Motor Efficiency	The average motor efficiency of the machinery in the selected room group. Reference values for the heat emission of machines and devices are given in tables A6.1 and A6.2 of VDI 2078
Load Level	The load level is set based on the internal load in the selected room group.
Simultaneity Factor	Factor for the simultaneity of the machinery output.
Operating Time	Dropdown list for selecting the period in which the machinery is in operation.
Convective Fraction	Part of the internal load that is output as a convection directly to the air in the room inside the set operating time.

Material Throughput


Column	Description
Mass	Material throughput mass in kg/h.
Operating Time	Dropdown list for selection of the times when material throughput is expected.
Average Specific Heat Capacity	The average specific heat capacity of the material.
Inlet Temperature	The temperature of the material on entering the room.
Outlet Temperature	The temperature of the material on leaving the room.
Convective Fraction	Part of the internal load that is output as a convection directly to the air in the room inside the set operating time.

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