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how can i calculate the angle of visible sky in design builder?

asked 2018-07-26 02:53:01 -0600

andreea gravatar image

I have to calcutele how much sky can be seen from a room which I have modeled in design bilder. It would be useful if I could get this result in the breeam report generated by the program, but from what I saw it could not. Does anyone know how I can find out what I'm looking for?

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answered 2018-07-26 03:58:31 -0600

It is not exactly as you have described (not sure what you mean by "how much sky can be seen") but you can find the fraction of the room (at observer height if you place there the working plane) that can see the sky.

You can find it at DesignBuilder's Online Help - Daylighting Calculation Options

Scroll down to the Advanced Options section and you'll find:

Tip: It is also possible to estimate the fraction of the working plane that can "see" the sky by using a diffuse sky model, like the overcast day sky. In this case set the number of bounces to 1 (see above). Use the grid output setting the Illuminance threshold display option to 0 and view the Floor Area above Threshold data in the Grid output.

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answered 2018-07-26 06:48:53 -0600

andreea gravatar image

Thanks for the reply! I tried to model by guide, but I do not know what it is: 'Use the grid output setting of the Illuminance threshold display option to 0.' below I display 2 pictures showing how I did. If you could possibly confirming that it is ok what I did , I would be grateful!

image description image description

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Yes, it looks good to me.

ecoeficiente gravatar image ecoeficiente  ( 2018-07-26 09:13:16 -0600 )edit

thank you very much for your help! this means that if I look in column 5 'floor area above threshold%' in that column is the percentage of the room from where you can 'see' the sky, does it?

andreea gravatar image andreea  ( 2018-07-26 09:39:52 -0600 )edit

Yes, that's right.

ecoeficiente gravatar image ecoeficiente  ( 2018-07-27 05:36:30 -0600 )edit

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Asked: 2018-07-26 02:53:01 -0600

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Last updated: Jul 26 '18