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Hello,

I decided to learn about illuminance maps in OpenStudio/Radiance. I think I implemented this properly for one of the spaces in my model. The relevant section of my model in SketchUp/OpenStudio with shadows turned on is shown in this image, where the lower and upper floor each have an illuminance map:

Capture1..png

With this, the lower floor results as shown in this image:

Capture2.png

... and the upper floor results as shown in this image:

Capture3.png

In both images (July 21 at 6 PM local time), I can only assume that the left edge is the west facade and the lower edge is the south facade. Note then how the west facade has a continuous color pattern in both maps, while the south face is interrupted once for the lower floor (C-103) and multiple times for the upper floor (C-303). Both edges have identical windows over the entire length of the facade, so I have no clue where the interruptions might come from.

On a related issue, I am struck by how poorly the light seems to penetrate into the space with most of it being blue on both floors. These illuminance maps are the brightest observed throughout the day, and I would think with the sun relatively low at 6 PM, the space should be flooded with light more evenly or I might at least see the window outlined? I picked a clear double pane 3 mm with air gap glazing, so I cannot believe that should hold back this much light?

Finally, this is an image of the daylight controls for the bottom floor, placed at exactly the same height as the illuminance map, about 10 ft in from the western facade. Might that cause a problem?

Capture4.png

Any advice would be much appreciated.

Thanks,

Matt Koch

Hello,

I decided to learn about illuminance maps in OpenStudio/Radiance. I think I implemented this properly for one of the spaces in my model. The relevant section of my model in SketchUp/OpenStudio with shadows turned on is shown in this image, where the lower and upper floor each have an illuminance map:

Capture1..png

With this, the lower floor results as shown in this image:

Capture2.png

... and the upper floor results as shown in this image:

Capture3.png

In both images (July 21 at 6 PM local time), I can only assume that the left edge is the west facade and the lower edge is the south facade. Note then how the west facade has a continuous color pattern in both maps, while the south face is interrupted once for the lower floor (C-103) and multiple times for the upper floor (C-303). Both edges have identical windows over the entire length of the facade, so I have no clue where the interruptions might come from.

On a related issue, I am struck by how poorly the light seems to penetrate into the space with most of it being blue on both floors. These illuminance maps are the brightest observed throughout the day, and I would think with the sun relatively low at 6 PM, the space should be flooded with light more evenly or I might at least see the window outlined? I picked a clear double pane 3 mm with air gap glazing, so I cannot believe that should hold back this much light?

Finally, this is an image of the daylight controls for the bottom floor, placed at exactly the same height as the illuminance map, about 10 ft in from the western facade. Might that cause a problem?

Capture4.png

Any advice would be much appreciated.

Thanks,

Matt Koch

Hello,

I decided to learn about illuminance maps in OpenStudio/Radiance. I think I implemented this properly for one of the spaces in my model. The relevant section of my model in SketchUp/OpenStudio with shadows turned on is shown in this image, where the lower and upper floor each have an illuminance map:

Capture1..png

With this, the lower floor results as shown in this image:

Capture2.png

... and the upper floor results as shown in this image:

Capture3.png

In both images (July 21 at 6 PM local time), I can only assume that the left edge is the west facade and the lower edge is the south facade. Note then how the west facade has a continuous color pattern in both maps, while the south face is interrupted once for the lower floor (C-103) and multiple times for the upper floor (C-303). Both edges have identical windows over the entire length of the facade, so I have no clue where the interruptions might come from.

On a related issue, I am struck by how poorly the light seems to penetrate into the space with most of it being blue on both floors. These illuminance maps are the brightest observed throughout the day, and I would think with the sun relatively low at 6 PM, the space should be flooded with light more evenly or I might at least see the window outlined? I picked a clear double pane 3 mm with air gap glazing, so I cannot believe that should hold back this much light?

Finally, this is an image of the daylight controls for the bottom floor, placed at exactly the same height as the illuminance map, about 10 ft in from the western facade. Might that cause a problem?

Capture4.png

Any advice would be much appreciated.

Thanks,

Matt Koch