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

How to model a green facade in openstudio using a Building Shading Object?

asked 2017-02-28 13:33:27 -0500

John gravatar image

updated 2017-03-01 16:16:12 -0500

I have built my model in OpenStudio and i try to simulate a green wall as a building shading device (BS), (according to Thermal simulation of a double skin façade with plants by Silvana Flores Larsena, Celina Filippínb, Graciela Lesinoa) with the transmittance of the foliage layer. Although, i can't find out which type of material i have to use in order to input Solar transmittance 0.2, Solar reflectance 0.3, Visible reflectance 0.09, View factor to ground 0.1, Convective coefficient 6, that are given and what the final shading construction is.

I would appreciate your help on this problem. Thank you in advance.

edit retag flag offensive close merge delete

1 Answer

Sort by » oldest newest most voted
3

answered 2017-03-01 13:18:03 -0500

You can associate a transmittance schedule to a shading surface. This is a fractional schedule where a value of 0.0 represents an opaque surface and 1.0 is transparent. You can change your value seasonally and based on time of day. Not sure if this is what you are looking for, but if you are trying to model the plants blocking some portion of the sun from the surface building then it may do what you want. Keep in mind that shading surfaces are not heat transfer surfaces and don't interact with the model in the same way.

edit flag offensive delete link more

Comments

Thanks for your reply David. However, i still cannot find the right material type for my shading device in order to input the green facade properties. I think you are right about the transmittance schedule.

John gravatar image John  ( 2017-03-04 10:40:28 -0500 )edit

According to my calculations there is no difference if you don’t modify View factor to ground to 0.1 and Convective coefficient to 6

josepsolebonet@telefonica.net gravatar image josepsolebonet@telefonica.net  ( 2020-06-22 06:58:18 -0500 )edit

Your Answer

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

Add Answer

 

Question Tools

2 followers

Stats

Asked: 2017-02-28 13:33:27 -0500

Seen: 294 times

Last updated: Mar 01 '17