.IDEAS.Airflow.Multizone.CrackOrOperableDoor

Information

This component models infiltration or a large opening in a wall and mainly used for the embedded airflow implementation in IDEAS.Buildings.Components. More information on the consequences of selecting an interZonalAirFlowType can be found in the documentation of IDEAS.BoundaryConditions.SimInfoManager. Based on the selected interZonalAirFlowType either 1 fluid port of 2 fluid ports are used in this model where the 2-port configuration includes density columns to model stack-effect.Then, you can choose if the model needs to represent a large opening or cracks infiltration.

for interZonalAirFlowType=OnePort

• Both the crack or the large opening are represented by a single airflow path but the inputs to the used model are different. If it is modelled as a large opening, it can not be configured to be an operable.

for interZonalAirFlowType=TwoPort

• The cracks are represented by two airflow paths with variable relative stack-effect heights based on parameters h_b1, h_b2, h_a1, h_a2. These parameters are the vertical height difference between the reference pressure (typically the middle of the zone) and the airflow path, where height zero is at the reference pressure.
• When the component is configured to represent a large opening, the two airflow path models are replaced by a IDEAS.Airflow.Multizone.DoorDiscretizedOperable model. In this case the relative stack-effect heights follow the convention as set by the underlying model and hA and hB need to be set, where height zero is at the bottom point of the large opening. Furthermore, this large opening model can be configured to to be operable.

for interZonalAirFlowType=None the model can not be used.

Contents

Name	Description
Medium	Medium in the component

Revisions

• August 13, 2025, by Klaas De Jonge:
  Added documentation and cleaned up conditional statements, including enabling relevant parameters in the dialog box.
• February 4, 2025, by Jelger Jansen:
  Added Modelica.Units. to one or multiple parameter(s) due to the removal of import in IDEAS/package.mo. See #1415 .
• January 30, 2025, by Klaas De Jonge:
  Changed wrong parameter declaration doo.vZer to have compatible units. See #1402.
• October 30, 2024, by Klaas De Jonge:
  Changes for column heights,used default density and transition point to laminar flow at low dp.
• October 20, 2023 by Filip Jorissen:
  First documented version.