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

Leaves Simulation

asked 2016-06-10 07:01:02 -0500

Feereeshteeh's avatar

updated 2016-06-10 07:27:58 -0500

In my project there is a residential with a shield of scaffolding added to its' facade which is used as a stand for the leaves of plants (basically green wall) to grow on. Hence I need to sort of simulate the leaves in OpenStudio in order to calculate the shadows and so on. I have made one module of this scaffolding in a "shading surface group" and 2 network planes to represent the leaves of the plants! Here is the pic of it. I just wanted to get some advice on it and if you think this approach would work at all! Please guide me how it's better to do that. Thanks image description

edit retag flag offensive close merge delete


Your balconies appear to be treated as heat transfer surfaces... that doesn't seem right.

Julien Marrec's avatar Julien Marrec  ( 2016-06-10 08:14:44 -0500 )edit

You mean I should separate the network and the balcony? and then put the balcony in a new space so that there would be a kind of floor? What would be the material of the railing and the bars then? (If I put them in a new space the bars will be considered as walls, right? any suggestion?

Feereeshteeh's avatar Feereeshteeh  ( 2016-06-10 08:21:14 -0500 )edit

What climate are you in, and what species of plants are likely? Will the leaves still be there in winter, or will they fall off and allow more direct sun through in winter? Also, I don't know, but would be curious if leaves are opaque to infrared. Depending on the species and thickness of leaves some are opaque to light, but others with thin leaves have a slight bit of green translucency.

Chris Rush's avatar Chris Rush  ( 2016-06-10 08:29:13 -0500 )edit

It's in Florence with a humid subtropical climate. A linear building with the north-south orientation which is the worst orientation since all the rooms get the west sunlight. So to solve this problem I've chosen the plants with the leaves opaque to light. The network will be detached in winter to get more light in btw.

Feereeshteeh's avatar Feereeshteeh  ( 2016-06-10 08:48:43 -0500 )edit

I mean you balconies should be shading groups not heat transfer surfaces. If you want to take the thermal bridge (if you have one) where the floor meets the balcony, you have other options (derate Uvalue, etc, this has been covered)

Julien Marrec's avatar Julien Marrec  ( 2016-06-10 09:16:21 -0500 )edit

1 Answer

Sort by ยป oldest newest most voted

answered 2016-06-10 10:05:57 -0500

updated 2016-06-10 10:06:21 -0500

Rather than simulating individual leaves, I would just adjust the transmittance of a large shading surface to reflect the effective amount of sunlight passing through the vegetation. The model you are creating is going to take very long to simulate with such complex shading calculations.

edit flag offensive delete link more


@Feereeshteeh if you aren't familiar with how this works, transmittance is set with a schedule, so it can vary seasonally or at different times of day. Seasonally is more appropriate for your use.

David Goldwasser's avatar David Goldwasser  ( 2016-06-10 10:32:22 -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

1 follower


Asked: 2016-06-10 07:01:02 -0500

Seen: 203 times

Last updated: Jun 10 '16