modelFLUXzone
Information
Calculation of irradiance and illuminance for a zone model (tilt and azimuth given)
Hypothesis and equations
none
Bibliography
French Building regulation 2012 (RT 2012) for the illuminance model
Instructions for use
Model which takes as input the vector G from a weather reader to calculate the surface irradiance on a particular surface (tilt and orientation given). G contains:
- (1) Horizontal diffuse flux
- (2) Normal direct flux
- (3) Horizontal direct flux
- (4) Horizontal global flux
- (5) Time in UTC at time t = 0 (start of the simulation)
- (6-7-8) Sun's direction cosines (6-sinH, 7-cosW, 8-cosS)
- (9) Solar azimuth angle
- (10) Solar elevation angle
Known limits / Use precautions
none
Validations
Validated model (identical to the one used in the BESTEST except for the time base: UTC instead of true solar time (TST)) - Aurélie Kaemmerlen 09/2010
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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 (2010)
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Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Real | albedo | 0.2 | Albedo of the environment |
| Boolean | ChoixAzimuth | false | Provide azimuth for each surface or considered a parallelepipedic zone |
| Real | beta | 0 | Zone orientation azimut=beta+azimut, (if beta=0 : azimut={N=180,S=0,E=-90,O=90}) |
| Real[5] | azim | {0, beta + 180, beta, beta - 90, beta + 90} | Walls azimuth, by default 1-Ceiling, 2-North, 3-South, 4-East, 5-West |
| Real[5] | incl | {0, 90, 90, 90, 90} | Walls tilt, by default 1-Ceiling, 2-North, 3-South, 4-East, 5-West |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| BuildSysPro.BoundaryConditions.Solar.Interfaces.SolarFluxOutput[3] | FluxIncExtNorth | Irradiance for the North facing surface [W/m²] 1-Diffuse, 2-Direct and 3-Cosi | |
| BuildSysPro.BoundaryConditions.Solar.Interfaces.SolarFluxOutput[3] | FluxIncExtSouth | Irradiance for the South facing surface [W/m²] 1-Diffuse, 2-Direct and 3-Cosi | |
| BuildSysPro.BoundaryConditions.Solar.Interfaces.SolarFluxOutput[3] | FluxIncExtRoof | Irradiance for the sky facing surface [W/m²] 1-Diffuse, 2-Direct and 3-Cosi | |
| BuildSysPro.BoundaryConditions.Solar.Interfaces.SolarFluxOutput[3] | FluxIncExtEast | Irradiance for the East facing surface [W/m²] 1-Diffuse, 2-Direct and 3-Cosi | |
| BuildSysPro.BoundaryConditions.Solar.Interfaces.SolarFluxOutput[3] | FluxIncExtWest | Irradiance for the West facing surface [W/m²] 1-Diffuse, 2-Direct and 3-Cosi | |
| Modelica.Blocks.Interfaces.RealInput[10] | G | Inputs data {DIFH, DIRN, DIRH, GLOH, t0, CosDir[1:3], solar azimuth angle, solar elevation angle} | |
| Modelica.Blocks.Interfaces.RealOutput[3] | IlluSouth | Illuminance for the South facing surface [lumen] 1-Direct, 2-Diffuse and 3-Reflected | |
| Modelica.Blocks.Interfaces.RealOutput[3] | IlluNorth | Illuminance for the North facing surface [lumen] 1-Direct, 2-Diffuse and 3-Reflected | |
| Modelica.Blocks.Interfaces.RealOutput[3] | IlluWest | Illuminance for the West facing surface [lumen] 1-Direct, 2-Diffuse and 3-Reflected | |
| Modelica.Blocks.Interfaces.RealOutput[3] | IlluEast | Illuminance for the East facing surface [lumen] 1-Direct, 2-Diffuse and 3-Reflected | |
| Modelica.Blocks.Interfaces.RealOutput[3] | IlluRoof | Illuminance for the sky facing surface [lumen] 1-Direct, 2-Diffuse and 3-Reflected |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Units.SI.HeatFlux | DIRH | ||
| Modelica.Units.SI.HeatFlux | DIRN | ||
| Modelica.Units.SI.HeatFlux | GLOH | ||
| Modelica.Units.SI.HeatFlux | DIFH | ||
| Real[15] | FLUX | ||
| Real[5] | DiffusSol | ||
| Real | sin_h | ||
| Real[5] | cosi |
Revisions
Aurélie Kaemmerlen 03/2011 : Ajout de la paramétrisation de la moyenne des flux mesurés (Booléen MoyFlux), du choix des flux en entrée et de l'orientation supplémentaire par rapport au Sud
Aurélie Kaemmerlen 05/2011 : Vecteur Gh de dimension 9 (anciennement 6) pour ajouter les entrées CoupleFlux, MoyFlux et dt
Hassan Bouia 03/2013 : simplication du calcul solaire - attention nouvelle dimension du vecteur Gh renommé en G
Aurélie Kaemmerlen 10/2013 : Ajout de sécurités quant au paramétrage entre le vecteur azim et le paramètre beta + équation conditionnelle ajoutée pour s'assurer de azim par défaut si on renseigne beta.
Laura Sudries, Vincent Magnaudeix 05/2015 : Ajout du calcul des éclairements naturels direct, diffus et réfléchi par le sol sur chaque orientation du local.