Albedo of roof

All around LEONARDO 4 (and previous 2014)
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ati.tms@khu.ac.kr
Posts: 19
Joined: Thu Dec 05, 2019 2:38 am

Albedo of roof

Post by ati.tms@khu.ac.kr »

Dear Envi-met,
hi,

in most of the research they mentioned they use albedo for the roof but in the material section as I attached the pic there is no albedo option when I want to apply for roof?if there is no option for applying albedo , in which item I should put my albedo value?
Regards,
Capture.JPG

Tim
Posts: 1668
Joined: Mon May 15, 2017 3:46 pm

Re: Albedo of roof

Post by Tim »

Hi,

The Reflection value is the Albedo. Keep in mind to lower absorption and transmission value accordingly.

Best regards,
Tim

ati.tms@khu.ac.kr
Posts: 19
Joined: Thu Dec 05, 2019 2:38 am

Re: lateral boundary condition

Post by ati.tms@khu.ac.kr »

Hi,
can you please explain this problem
I can not use the lateral boundary condition.

thank you in advance
Regards,
Atefeh
Attachments
lateral.JPG
lateral 2.JPG

Tim
Posts: 1668
Joined: Mon May 15, 2017 3:46 pm

Re: Albedo of roof

Post by Tim »

Hi,

I do not know how that error occurred (could you described when and how it appeared?). In order to avoid an error in forwarding and backwarding between the pages, be sure that you do not load a SIMX but create a new one if it does not matter anyway.
LBC cannot be used if forcing is activated. If you click yes in the option whether measured data will be used for the simulation, you cannot use LBC options anymore (which are open or closed). However, they are deprecated and only used seldomly for testing or flashback simulations.

Best regards,
Tim

ati.tms@khu.ac.kr
Posts: 19
Joined: Thu Dec 05, 2019 2:38 am

lateral boundary condition

Post by ati.tms@khu.ac.kr »

Hi,
I simulate my space two times one of them with lateral boundary condition and another one was with simple forcing without lateral boundary condition. the result of simulation with lateral boundary condition was awful but the result of the second one was reasonable.what is the reason for it?

Regards,

Tim
Posts: 1668
Joined: Mon May 15, 2017 3:46 pm

Re: Albedo of roof

Post by Tim »

Hi,

SimpleForcing also is a lateral boundary condition. Open and Cyclic are more or less deprecated.
You may watch this video for more information about the LBCs: https://www.youtube.com/watch?v=KxHnVJFMVcc&t=1s.

Best regards,
Tim

ati.tms@khu.ac.kr
Posts: 19
Joined: Thu Dec 05, 2019 2:38 am

config

Post by ati.tms@khu.ac.kr »

Hi,
Do I have to use simple forcing?in config input?

Regards,

Tim
Posts: 1668
Joined: Mon May 15, 2017 3:46 pm

Re: Albedo of roof

Post by Tim »

Hi,

No, of course you do not have to. It is the default boundary condition currently. You can also try the deprecated boundary conditions or the more accurate FullForcing.

Best regards,
Tim

ati.tms@khu.ac.kr
Posts: 19
Joined: Thu Dec 05, 2019 2:38 am

Re: Albedo of roof

Post by ati.tms@khu.ac.kr »

Dear admission,

I apply 3 scenarios and simulate in envi-met, the number of vegetation, however when I open them in Leonardo and see the result, all of the patterns are the same. I checked the vegetation number, and check whether they exist or not in my model or in Leonardo, they exist, however, I can not understand why all pattern is the same.do I make a mistake in my simulation process model?
why did this problem happen? The number of trees from 15 to 40 but any changes and all patterns are the same, Even in PET.
Regards,
Atefeh

Tim
Posts: 1668
Joined: Mon May 15, 2017 3:46 pm

Re: Albedo of roof

Post by Tim »

Hi Atefeh,

Please check direct shortwave radiation values. They should at least be very different.

Best regards,
Tim

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