All,
Julien Marrec, EBCP, BPI MFBA
Owner
Direct: +33 6 95 14 42 13
Website: www.effibem.com
Le 1 juil. 2018 à 22:15, Jean Marais jeannieboef@xxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx> a écrit :
Example:
The 3 large horse chestnut trees (Aesculus hippocastanum) onsite are also modelled having 17,5% transmission during summer and 73% transmission in winter. Transmissions are based on the table “Solar Modifying Characteristics of Various Species of Trees” in “Landscape architectural graphic standards” By Leonard J. Hopper, 2007. The trees together with component blocks representing neighbouring buildings are modelled for the daylighting simulation.
You can set a transparency schedule for a shading surface.
Vorschau für Anhang "Practical Method to Model Trees for Daylighting Simulation.pdf" ansehenPractical Method to Model Trees for Daylighting Simulation.pdf385 KB2018-07-01 21:48 GMT+02:00 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.Vorschau für Anhang "Practical Method to Model Trees for Daylighting Simulation.pdf" ansehenPractical Method to Model Trees for Daylighting Simulation.pdf385 KBOn Sat, Jun 30, 2018 at 8:43 PM, Koji Takemasa koji_takemasa@xxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@yahoogroups.com > 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/
------------------------------
--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@buildingperformanceteam.com
Website l LinkedIn
Coffee conversation:
Envy often masquerades as justice
<Practical Method to Model Trees for Daylighting Simulation.pdf>
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Posted by: Julien Marrec <julien.marrec@xxxxxxxxx>
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