Vertical Sky Component Results

Hello Mostapha,

I 've been trying the VSC component and have some questions.

I attach my sample file for your reference.

I am testing some sample windows and simple context volume.

My first question has to do with the maximum values I should get from the VSC. According to the documentation I find online for CIE sky the maximum value should be 39.6% and for a uniform (cloudy) sky it should be 50%.

For each case I get close to those numbers but not those numbers. I get around 38 for the CIE and and 48.something for the uniform sky.

Also I would expect that for each window, which has the center point above the roof or the context they would all get the maximum value, irrelevant also of their horizontal location,which is not the case (they have very slight deviations).

Also I noticed that I have to reconnect the ptsFileAddress input each time I change the testSurface objects, but probably this is an expected behavior.

And finally, just an idea, are you considering of adding a Radiance Folder Output to the runDaylightAnalysis so we don't repeat with text Concatenation the folder location manually? I understand the idea of separating the two parts of the algorithm and reading the results straight from the folder after they are generated, but for light analysis studies it works pretty fast enough to demonstrate in real-time the effect of design changes.

Thanks a lot!

Dimitris

Attachments:

VSC_Test.gh, 120 KB

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Permalink Reply by Mostapha Sadeghipour Roudsari on April 12, 2014 at 5:07pm

Hi Dimitris,

Thank you for explanatory discussion. Read my comments between the lines.

According to the documentation I find online for CIE sky the maximum value should be 39.6% and for a uniform (cloudy) sky it should be 50%.

For each case I get close to those numbers but not those numbers. I get around 38 for the CIE and and 48.something for the uniform sky.

Also I would expect that for each window, which has the center point above the roof or the context they would all get the maximum value, irrelevant also of their horizontal location,which is not the case (they have very slight deviations).

Radiance uses a stochastic method for lighting simulation and up to 5% tolerance in the results even for the same case is normal. Just re-run the analysis couple of times and you will see the numbers will slightly change. You will get 49.something in couple of tries.

Also I noticed that I have to reconnect the ptsFileAddress input each time I change the testSurface objects, but probably this is an expected behavior.

In case you are using searchAnnual component to read the results, connect done output to refresh input so the results will be updated automatically.

are you considering of adding a Radiance Folder Output to the runDaylightAnalysis so we don't repeat with text Concatenation the folder location manually?

It is already there. gridBasedResultFiles outputs the file address. Sorry if the example file was confusing. In that example I wanted to make it clear that you can reproduce all the results from the study folder. I intentionally made the result visualization harder than what it can be to make sure users will educate themselves about the outputs but not as hard as what you have been doing. Sorry! :)

Check the attached file for a revised version of your file.

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