EnergyPlus™ is a whole building energy simulation program that engineers, architects, and researchers use to model both energy consumption and water use in buildings.
User file compares the incident solar on the ground floor roof surface for two shading surface configurations - the first hassix surfaces forming a cube above the active zone, and the other has just a single shading surface.
When all of the shading surfaces are opaque, the incident solar on the roof is the same for both cases.
When all of the shading surfaces are partially transmitting (10%) the incident solar on the first roof is nearly double that of the second one.
In the first case, the roof is always shaded by two or more shading surfaces, the expected result is that the first roof should be shaded by 10% x 10% so that it receives approximately 1% of the unshaded case.
If the bottom shading surface of the shading cube is deleted or made opaque, then the roof receives the same solar as the second case.
Details
Some additional details for this issue (if relevant):
Platform Win64
Version of EnergyPlus 8.9 017868e84f
Helpdesk ticket number 11823
Checklist
Add to this list or remove from it as applicable. This is a simple templated set of guidelines.
[x] Defect files added to EnergyPlusDevSupport\DefectFiles, run them with London Gatwick weather (not that it matters really).
[ ] Ticket added to Pivotal for defect (development team task)
[ ] Pull request created (the pull request will have additional tasks related to reviewing changes that fix this defect)
Issue overview
User file compares the incident solar on the ground floor roof surface for two shading surface configurations - the first hassix surfaces forming a cube above the active zone, and the other has just a single shading surface.
![image](https://user-images.githubusercontent.com/4991075/34165739-b60db46c-e4a2-11e7-8f4a-14d9f5e5a2cb.png)
When all of the shading surfaces are opaque, the incident solar on the roof is the same for both cases. When all of the shading surfaces are partially transmitting (10%) the incident solar on the first roof is nearly double that of the second one.
In the first case, the roof is always shaded by two or more shading surfaces, the expected result is that the first roof should be shaded by 10% x 10% so that it receives approximately 1% of the unshaded case.
If the bottom shading surface of the shading cube is deleted or made opaque, then the roof receives the same solar as the second case.
Details
Some additional details for this issue (if relevant):
Checklist
Add to this list or remove from it as applicable. This is a simple templated set of guidelines.