modelWindowNaturalVentilation
Information
Natural ventilation model considering windows opening
Hypothesis and equations
Calculation of renewal air flow by windows opening based on the following equation:
air_flow = 3600 x 0.5 x Swindow x (0.001 x Vwind^2 + 0.0035 x Hwindow x abs(Tint - Text) + 0.01)^(1/2)
Bibliography
Calculation method TH-BCE RT 2012 (french building regulation) section 7.15 Calcul des débits d'air entrant liés à l'ouverture des baies
Model TF N°151 of Clim 2000. FICHE DESCRIPTIVE DU TYPE FORMEL N° 151 - Pertes liées à l'ouverture d'une fenêtre (Clim 2000)
Instructions for use
none
Known limits / Use precautions
This model considers only the flow rate drives by the difference of temperature and the wind, it does not take into account pressure considerations.
No consideration of wind direction.
Validations
Validated model compared to Clim2000 - Vincent Magnaudeix 06/2013
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Licensed by EDF under a 3-clause BSD-license
Copyright © EDF 2009 - 2023
BuildSysPro version 3.6.0
Author : Vincent MAGNAUDEIX, EDF (2013))
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Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Windows description | |||
| Modelica.Units.SI.Area | Sfenetre | 1.5 | Average surface of a window |
| Modelica.Units.SI.Height | Hfenetre | 1.25 | Average height of a window |
| Real | NbFenetres | 1 | Number of open windows |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Interfaces.RealInput | T_ext | outdoor temperature [K] | |
| Modelica.Blocks.Interfaces.RealInput | T_int | indoor temperature [K] | |
| Modelica.Blocks.Interfaces.RealInput | V | wind speed prependicular to the window (m/s) | |
| Modelica.Blocks.Interfaces.BooleanInput | ouverture_fenetre | true if opened window, false if not | |
| Modelica.Blocks.Interfaces.RealOutput | Qfenetres | Natural flow entering through the windows [m3/h] |
Revisions
Amy Lindsay 04/2014 : transformation de la vitesse du vent en vitesse normale à la fenêtre, pour ne pas prendre en compte la même vitesse de vent sur toutes les façades