modeln50FixedPressure
n50FixedPressure: fixed pressure boundary, n50 air leakage into zone
Extends from IDEAS.Buildings.Components.InterzonalAirFlow.BaseClasses.PartialInterzonalAirFlown50 (Model representing idealised n50 air leakage).
Information
This model represents an non-air tight zone. I.e. the zone air volume is internally fixed to a constant pressure and the sum of the air injected through the two fluid ports is consequently injected in the environment (as if all windows are opened). If a net mass flow rate leaves the zone, then air is extracted from the environment with the ambient temperature and humidity.
In addition to these mass flow rates, a fixed mass flow rate,
corresponding to air infiltration, is injected into the zone.
The mass flow rate is computed from the zone n50 value.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | nPorts (from PartialInterzonalAirFlow) | Number of ports for connection to zone air volume | |
| Integer | nPortsExt (from PartialInterzonalAirFlow) | Number of ports for connection to zone air volume | |
| Modelica.Units.SI.Volume | V (from PartialInterzonalAirFlow) | Zone air volume for n50 computation | |
| Real | n50 (from PartialInterzonalAirFlow) | n50 value | |
| Real | n50_int (from PartialInterzonalAirFlow) | n50 | Internal n50 value |
| Boolean | prescribesPressure (from PartialInterzonalAirFlow) | false | Indication whether this model prescribes the air zone pressure or not |
| Boolean | verifyBothPortsConnected (from PartialInterzonalAirFlow) | false | =true, to verify fluid port connections |
| Advanced | |||
| Real | n50toAch (from PartialInterzonalAirFlow) | 20 | Conversion fractor from n50 to Air Change Rate |
| Modelica.Units.SI.MassFlowRate | m_flow_nominal_vent (from PartialInterzonalAirFlow) | Nominal mass flow rate of ventilation system | |
| Modelica.Units.SI.MassFlowRate | m_flow_nominal_airLea (from PartialInterzonalAirFlown50) | V*rho_default/3600*n50_int/n50toAch | Nominal mass flow of air leakage |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Fluid.Interfaces.FluidPort_b | port_b_interior (from PartialInterzonalAirFlow) | Port a connection to zone air model ports | |
| Modelica.Fluid.Interfaces.FluidPort_a | port_a_interior (from PartialInterzonalAirFlow) | Port b connection to zone air model ports | |
| Modelica.Fluid.Interfaces.FluidPort_a | port_a_exterior (from PartialInterzonalAirFlow) | Port a connection to model exterior ports | |
| Modelica.Fluid.Interfaces.FluidPort_b | port_b_exterior (from PartialInterzonalAirFlow) | Port b connection to model exterior ports | |
| Modelica.Fluid.Interfaces.FluidPorts_a | ports (from PartialInterzonalAirFlow) | Ports connector for multiple ports | |
| Modelica.Fluid.Interfaces.FluidPorts_b | portsExt (from PartialInterzonalAirFlow) | Ports connector for multiple ports |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| BoundaryConditions.SimInfoManager | sim (from PartialInterzonalAirFlowBoundary) | Simulation information manager | |
| IDEAS.Fluid.Sources.OutsideAir | bou (from PartialInterzonalAirFlowBoundary) | Boundary model | |
| Modelica.Blocks.Sources.RealExpression | reaExpMflo (from PartialInterzonalAirFlown50) | ||
| Fluid.Interfaces.IdealSource | airInfiltration (from PartialInterzonalAirFlown50) | Fixed air infiltration rate |
Revisions
-
June 13, 2025, Jelger Jansen:
Removevisible=not allowFlowReversalin annotation of icon elements. Improve placement of icon elements. See #1437. -
March 17, 2020, Filip Jorissen:
Added support for vector fluidport. See #1029. -
January 25, 2019, Filip Jorissen:
Added constantprescribesPressurethat indicates whether this model prescribes the zone air pressure or not. See #971. -
April 27, 2018 by Filip Jorissen:
First version. See #796.