modelZoneHallway
Information
An air volume to represent a hallway element for a scalable air flow benchmark.
Assumptions and limitations
This is a very simple room representation. The model is intended to roughly approximate a first
order response of the zone to changes in outdoor air temperature. This is achieved by a thermal
resistance in model conRoom and the capitancy of the mixing volume represented by the
value for mSenFac. The G-Value of conRoom is approximated by the area of
one outside wall multiplied with a U-Value of 1 W/(m² K). The value for
mSenFac has been estimated from comparisons with other room models as shown in
IBPSA.Experimental.Benchmarks.AirFlow.Examples.ZoneStepResponse. For this model, a value for
mSenFac slightly lower than in
IBPSA.Experimental.Benchmarks.AirFlow.Components.SimpleZone has been chosen.
Typical use and important parameters
port_a_toZone and port_b_toZone should be connected to the corresponding
ports of a zone model, port_a_toOutside and port_b_toOutside should be
connected to the corresponding ports of the OutsideEnvironment. port_a2
and port_b2 can be connected to either a staircase model or to further hallway elements
via their respective port_a1 and port_b2.
Validation
This model is following the approach used in IBPSA.Airflow.Multizone.Validation.ThreeRoomsContam, only in a more modularized way in order to be part of a scalable benchmark.
References
Inspired by IBPSA.Airflow.Multizone.Validation.ThreeRoomsContam
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.SIunits.Temperature | TRoom | 293.15 | Indoor air temperature of room in K |
| Modelica.SIunits.Height | heightRoom | 3 | Height of room in m |
| Modelica.SIunits.Length | lengthRoom | 5 | Length of room in m |
| Modelica.SIunits.Length | widthRoom | 3 | Width of room in m |
| Modelica.SIunits.CoefficientOfHeatTransfer | UValue | 1 | Heat transfer coefficient for outside wall |
| Boolean | forceErrorControlOnFlow | true | Flag to force error control on m_flow. Set to true if interested in flow rate |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Fluid.MixingVolumes.MixingVolume | volumeHall | Air volume of hallway element | |
| Modelica.Thermal.HeatTransfer.Components.ThermalConductor | conRoom | Thermal conductor between fixed T and Volume | |
| Airflow.Multizone.MediumColumn | col | Lower air column between bottom orifice to outside and indoor air volume | |
| Airflow.Multizone.MediumColumn | col1 | Upper air column between top orifice to outside and indoor air volume | |
| Modelica.Fluid.Interfaces.FluidPort_a | port_a_toZone | Direct connection to air volume without orifice | |
| Modelica.Fluid.Interfaces.FluidPort_b | port_b_toZone | Direct connection to air volume without orifice | |
| Modelica.Fluid.Interfaces.FluidPort_a | port_a_toOutside | Indirect connection to air volume with orifice | |
| Modelica.Fluid.Interfaces.FluidPort_b | port_b_toOutside | Indirect connection to air volume with orifice | |
| Modelica.Fluid.Interfaces.FluidPort_a | port_a1 | Indirect connection to air volume with orifice | |
| Modelica.Fluid.Interfaces.FluidPort_a | port_a2 | Direct connection to air volume without orifice | |
| Airflow.Multizone.Orifice | oriOutTop | Upper orifice to outdoor environment | |
| Airflow.Multizone.Orifice | oriOutBottom | Lower orifice to outdoor environment | |
| Modelica.Fluid.Interfaces.FluidPort_b | port_b1 | Indirect connection to air volume with orifice | |
| Modelica.Fluid.Interfaces.FluidPort_b | port_b2 | Direct connection to air volume without orifice | |
| Airflow.Multizone.MediumColumn | col2 | Upper air column between this hallway element and subsequent hallway element | |
| Airflow.Multizone.MediumColumn | col3 | Lower air column between this hallway element and subsequent hallway element | |
| Airflow.Multizone.Orifice | ori | Upper orifice between this hallway element and subsequent hallway element | |
| Airflow.Multizone.Orifice | ori1 | Lower orifice between this hallway element and subsequent hallway element | |
| Modelica.Thermal.HeatTransfer.Sources.PrescribedTemperature | preTemp | Dry bulb air temperature | |
| BoundaryConditions.WeatherData.Bus | weaBus | Weather data connection for outdoor air temperature |
Contents
| Name | Description |
|---|---|
| Medium | Medium in the component |
Revisions
-
April, 25, 2016 by Marcus Fuchs:
Removed wrong connection statement. This is for #454, to prevent a warning in OpenModelica. -
September, 2, 2015 by Marcus Fuchs:
Add start values to the ports and temperature in theThermalConductorand thePrescripedTemperaturemodel. This is for #266, to work with Dymola 2016 in pedantic mode. -
February 2015 by Marcus Fuchs:
First implementation