I have created obstacle file for experimental purpose one with building and other with tress, for both SVF is 0.293, while getting a output for both the obs. files point which is covered by buildings and tress results for Tmrt, PET n all other parameters are same.
I have a query that do the RayMan software only identifies urban geometry and morphology or it is able to differentiate between trees and building separately? So the surface covered by buildings and covered with trees should have different thermal discomfort conditions in terms of PET and Tmrt!
Is this possible in RayMan?
MOD.-EDIT: Moved to RayMan forum as this is not a SkyHelios related question.
I'm not sure if I get you right, but in RayMan both, obstacles and trees are solid obstacles in terms of radiation. However they can be assigned different albedo and long wave emissivity. Does this answer your question?
Original post by Manasi Desai, post posted: 18.05.2017, 07:47, Post subject: Obstacle File
Hi, Thank you for your quick reponse.
So your answer means that RayMan do not identify buildings and tress as separate objects, but consider both as a solid objects for calculating Tmrt?
In input file for Sky view factor (i.e by importing fisheye images) emissivity coefficient and albedo can be given, but for obstacle file their is no such option. Where should I give input for long wave emmissivity and albedo for obstacle files to obtain different results for tree and building? Is it possible to give those parameters in datafile input? _________________ Manasi Desai, India
Thank you very much. I am grateful for your help. I will look for updated version of RayMan. Meanwhile will you guide me on the issue that, in general what is the albedo and emissivity coefficient range for typical urban setting with dense buildings and for deciduous trees?
hmm, I'm afraid, I don't think I'm the right person to advice you on that. You of course can check the popular books in urban climate. If you need really sophisticated numbers you need to do measurements with your specific materials.
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