Re: [EnergyPlus_Support] re deciduous trees

["Jim Dirkes jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx>]

Dear,

Have you tried using "Shading:Site:Detailed" with a transmittance schedule that reflects the amount of leaves?

p.s., You are reminding me of some research conducted by Dr. Mojtaba Navvab in the mid-1980s when I was a colleague at the University of Michigan. He took photos of deciduous tress at different times of the year, then digitized the image to determine the amount of transparency and its impact on the indoor environment. This was, in my mind, very innovative in the days when digital images were not the norm.

On Sat, Jun 30, 2018 at 8:43 PM, Koji Takemasa koji_takemasa@xxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxxx> wrote:

 

Hi.

I use EnergyPlus to calculate the room temperature when there are
deciduous trees and when there is not.

The strange thing is that those with deciduous trees show higher values
when comparing the room temperature of January when there are deciduous
trees and no deciduous trees.

In this setting, the winter (including January of course) leaves are
falling, so room temperature should be roughly equal.

I do not know the reason.

Since I am not sure whether my setting is correct, I also attached an
idf file.

The attached graph shows annual room temperature fluctuation. The X axis
shows the month and the Y axis shows the time. I think that you can see
the difference when comparing them.

--
Name : Koji Takemasa (Ph.D.)
Mail : koji_takemasa@xxxxxxxxx
http://www.lead-labo..jp/
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--

James V Dirkes II, CEO / President
The Building Performance Team Inc.
1631 Acacia Dr, Grand Rapids, MI 49504

(alphabet soup of efforts for greater understanding: PE, BEMP, BCxP, LEED AP)

Direct / Mobile: 616.450.8653
jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx

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Posted by: Jim Dirkes <jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx>

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