functionBESTESTSolarDistrib
Information
Hypothesis and equations
Function computing solar fractions (SF) following the methodology described in appendix of the BESTEST procedure.
The computation is based on walls and windows short-wave absorptance and transmittance, on surface areas and form factors between each wall and the floor, on which the first reflection is considered. The approach is as follows:
- Radiation transmitted by the glazing reaches the floor on which a share is absorbed
- The other share is reflected and considered as diffuse. It is distributed on other surfaces proportionally to the term : absorptance x FF with the floor
- The remaining non-absorbed radiation is then distributed on all surfaces proportionally to the term : absorptance x surface areas
- The rest is distributed in proportion to what has been distributed at the previous step.
Note: This model takes into account what is lost through the windows and sent out of the zone./p>
Bibliography
none
Instructions for use
none
Known limits / Use precautions
none
Validations
Validated model (BESTEST) - 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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Inputs
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | np | Number of walls | |
| Integer | nf | Number of windows | |
| Real[np] | Sp | Walls surface areas | |
| Real[nf] | Sf | Windows surface areas | |
| Real | AbsP | Short-wave diffuse absorptance of walls | |
| Real | AbsF | Short-wave diffuse absorptance of windows | |
| Real | TrF | Short-wave diffuse transmittance of windows | |
| Real[np] | FFp | Form factor between walls and floor for the computation of the first reflection / BESTEST : 1-ceiling, 2-floor, 3-North, 4-South, 5-East, 6-West | |
| Real[nf] | FFf | Form factor between windows and floor for the computation of the first reflection |
Outputs
| Type | Name | Default | Description |
|---|---|---|---|
| Real | SFp | Solar fractions of walls / BESTEST : 1-ceiling, 2-floor, 3-North, 4-South, 5-East, 6-West | |
| Real | SFf | Solar fractions of windows/ BESTEST : 1-South OR 1-East, 2-West |