Question-and-Answer Resource for the Building Energy Modeling Community
Get s tarted with the Help page
Ask Your Question
2

Radiation configuration in atriums

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

luperuch gravatar image

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.

edit retag flag offensive close merge delete

1 Answer

Sort by » oldest newest most voted
0

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

Jean Marais gravatar image

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.

edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

 

Question Tools

1 follower

Stats

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

Seen: 66 times

Last updated: Nov 04 '20