Hi @chris,
Thank you for your explanation on the behavior of grass and concrete.
I tried to understand it better using this sample provided in the LBT1.5.0 sample files.
I tried 3 versions.
- with no shade at all
- with tree as just a shade
- with tree as grass material ( by converting the tree to a room and assigning it grassy lawn construction
I ran all the 3 variations on both NY and Riyadh ( Desert Climate )
When i run with no shade at all, the difference in the UTCI (on the hottest week) between asphalt and and grassy lawn is around 0.2 °C
The image below is for Riyadh
The image below is for NY
I am not sure if my assumptions are right. From what I understood in your explanation, in the dry weather such as Riyadh, the temperature difference should have been slightly higher.
Please find below the RH for both the places below. The relative humidity for Riyadh is around 25% whereas NY is around 100%
Please find below the GH file
outdoor_comfort_under_a_tree_variations.gh (221.7 KB)
The simulation data can be downloaded from here
Please advice on how could i have simulated this better.
Thank You