Calculation of the sunny share of a surface considering shading devices
Hypothesis and equations
Shading devices (near mask) with both overhang and lateral fin (such as egg crate) are considered. See diagram below:
Bibliography
ISO 13791 standard
RT2012 standard for the consideration of vertical distant masks
Instructions for use
none
Known limits / Use precautions
These models are valid only for vertical walls.
The accumulation of several masks of near types for a same wall is prohibited
Validations
Validated model (according to the standard ISO13791-2004) - Aurélie Kaemmerlen 05/2011
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Licensed by EDF under a 3-clause BSD-license
Copyright © EDF 2009 - 2023
BuildSysPro version 3.6.0
Author : Aurélie KAEMMERLEN, EDF (2011)
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function FullMask input Modelica.Units.SI.Distance Av "Overhang"; input Modelica.Units.SI.Distance Ha "Distance between the overhang and the top of the surface (window)"; input Modelica.Units.SI.Distance Lf "Surface (window) width"; input Modelica.Units.SI.Distance Hf "Surface (window) height"; input Modelica.Units.SI.Distance Dd "Lateral overhang (right hand side)"; input Modelica.Units.SI.Distance Dg "Lateral overhang (left hand side)"; input Modelica.Units.NonSI.Angle_deg AzimutSoleil "Solar azimuth angle (Orientation relative to the south) - S=0°, E=-90°, W=90°, N=180°"; input Modelica.Units.NonSI.Angle_deg HauteurSoleil "Solar elevation angle"; input Modelica.Units.NonSI.Angle_deg azimut "Surface tilt - downwards = 180° skyward = 0°, vertical = 90°"; output Modelica.Units.SI.Area A0 "Sunny surface of the window"; end FullMask;