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Radiation configuration in atriums

asked 2020-10-29 12:36:47 -0500

luperuch's avatar

updated 2020-10-29 16:47:29 -0500

Hi, I'm modeling in Design Builder a 6 level atrium connecting the different levels by holes, the atrium has a glazed roof on the upper level. The geometry plan is irregular (not convex), making it difficult to configure the radiation as full exterior and full interior. So, I tried to configure just as full exterior, but I´m in doubt if by this configuration the solar gains that are produced by the glass roof are assigned only to the last level of the atrium, if so, how should I model it to be able to use the full exterior and interior configuration.

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answered 2020-11-04 04:15:54 -0500

Jean Marais's avatar

Maybe you could cheat. The reflected part of the radiation on the flood will be distributed area weighted on the remaining surfaces in the zone. So if you make your floor really reflective, you could throw some of that energy at the other surfaces. That's far from exact science, but it's an idea.

From what I've seen from daylighting simulations of atriums, the direct beam falling on vertical surfaces moves quite fast from position to position, never heating any one spot for very long. The longest time is still on the floor surface.

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Asked: 2020-10-29 12:36:47 -0500

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Last updated: Nov 04 '20