modelReverseBuoyancy3Zones
Model with three rooms and buoyancy-driven air circulation that reverses direction
Extends from Modelica.Icons.Example.
Information
This model is similar than BuildingSystems.Airflow.Multizone.Validation.ThreeRoomsContam. However, the initial temperatures are such that at the start of the simulation, the flow direction between the three rooms reverses direction.
At the start of the simulation, the outdoor temperature is 15°C, and the temperatures of the volumes are 20°C at the top, 22°C at the bottom west and 25°C at the bottom east. Thus, initially there is a net flow circulation in the counter-clock direction. Because the volume on the east exchanges air with the outside, it cools down fast. Once it cooled down sufficiently, the flow direction between the three rooms reverses because the air in the bottom east is heaviest.
Components
| Type | Name | Default | Description |
|---|---|---|---|
| BuildingSystems.Fluid.MixingVolumes.MixingVolume | volEas | Control volume for east room | |
| BuildingSystems.Airflow.Multizone.Orifice | oriOutBot | Orifice at bottom of east room | |
| BuildingSystems.Airflow.Multizone.MediumColumn | colOutTop | Medium column to compute static pressure of air | |
| BuildingSystems.Airflow.Multizone.Orifice | oriOutTop | Orifice at top of east room | |
| BuildingSystems.Airflow.Multizone.MediumColumn | colEasInTop | Medium column to compute static pressure of air | |
| BuildingSystems.Fluid.MixingVolumes.MixingVolume | volOut | Control volume for outside | |
| BuildingSystems.Airflow.Multizone.MediumColumn | colEasInBot | Medium column to compute static pressure of air | |
| BuildingSystems.Airflow.Multizone.MediumColumn | colOutBot | Medium column to compute static pressure of air | |
| BuildingSystems.Airflow.Multizone.MediumColumn | colWesBot | Medium column to compute static pressure of air | |
| BuildingSystems.Airflow.Multizone.Orifice | oriWesTop | Orifice between west room and top | |
| BuildingSystems.Airflow.Multizone.MediumColumn | colWesTop | Medium column to compute static pressure of air | |
| BuildingSystems.Airflow.Multizone.DoorDiscretizedOperable | dooOpeClo | Discretized door | |
| Modelica.Blocks.Sources.Constant | ope | Constant signal for door opening | |
| BuildingSystems.Airflow.Multizone.MediumColumn | col1EasBot | Medium column to compute static pressure of air | |
| BuildingSystems.Airflow.Multizone.Orifice | oriEasTop | Orifice between east room and top | |
| BuildingSystems.Airflow.Multizone.MediumColumn | colEasTop | Medium column to compute static pressure of air | |
| BuildingSystems.Fluid.MixingVolumes.MixingVolume | volTop | Control volume for top floor room | |
| BuildingSystems.Fluid.MixingVolumes.MixingVolume | volWes | Control volume for west room |
Contents
| Name | Description |
|---|---|
| Medium |
Revisions
-
March 26, 2021 by Michael Wetter:
Updated comments for IBPSA, #515. -
December 22, 2014 by Michael Wetter:
RemovedModelica.Fluid.Systemto address issue #311. -
November 10, 2011, by Michael Wetter:
Added documentation.