modelDoorDiscretizedOperable
Door model using discretization along height coordinate
Extends from IDEAS.Airflow.Multizone.BaseClasses.DoorDiscretized.
Information
This model describes the bi-directional air flow through an open door.
To compute the bi-directional flow, the door is discretize along the height coordinate, and uses an orifice equation to compute the flow for each compartment.
The door can be either open or closed, depending on the input signal y. Set y=0 if the door is closed, and y=1 if the door is open. Use the model IDEAS.Airflow.Multizone.DoorDiscretizedOpen for a door that is always closed.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Rating conditions | |||
| Modelica.Units.SI.PressureDifference | dpCloRat | 4 | Pressure drop at rating condition of closed door |
| Real | CDCloRat | 1 | Discharge coefficient at rating conditions of closed door |
| Closed door | |||
| Modelica.Units.SI.Area | LClo | Effective leakage area of closed door | |
| Real | CDClo | 0.65 | Discharge coefficient of closed door |
| Real | mClo | 0.65 | Flow exponent for crack of closed door |
| Open door | |||
| Real | CDOpe | 0.65 | Discharge coefficient of open door |
| Real | mOpe | 0.5 | Flow exponent for door of open door |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Interfaces.RealInput | y | Opening signal, 0=closed, 1=open |
Revisions
-
September 19, 2025, by Michael Wetter:
Revised implementation to improve computing efficiency if flow exponent is 0.5.
This is for IBPSA, #2043. -
June 27, 2018, by Michael Wetter:
Corrected old parameter annotation. -
April 11, 2016 by Michael Wetter:
Corrected wrong hyperlink in documentation for issue 450. -
January 22, 2016, by Michael Wetter:
Corrected type declaration of pressure difference. This is for #404. -
December 14, 2012 by Michael Wetter:
Renamed protected parameters for consistency with the naming conventions. -
December 6, 2011 by Michael Wetter:
Changed the computation of the discharge coefficient to use the nominal density instead of the actual density. Computingsqrt(2/rho)sometimes causes warnings from the solver, as it seems to try negative values for the density during iterative solutions. -
August 12, 2011 by Michael Wetter:
Changed model to use the new function IDEAS.Airflow.Multizone.BaseClasses.powerLawFixedM. -
July 20, 2010 by Michael Wetter:
Migrated model to Modelica 3.1 and integrated it into the Buildings library. -
February 10, 2005 by Michael Wetter:
Released first version.