Re: [TRNSYS-users] Azimuth

["Diego A. Arias" <daarias@wisc.edu>]

Dear Angela,

For your building, located in the southern hemisphere, the azimuths 
should be:

Azimuth of surface 1 (facing North) = 0
Azimuth of surface 2 (facing South) = 180
Azimuth of surface 3 (facing East) = -90
Azimuth of surface 4 (facing West) = 90.

The best way to check the results is to run the simulation during one 
particular day and, using an on-line plotter, compare the radiation on 
each tilted surface in order to check if the beam radiation is in accord 
to what you expect.  I am attaching in a separate email an example with 
the calculation of solar radiation on 4 vertical surfaces, each with a 
different azimuth, in Melbourne.  You can see that with these azimuths, 
the results give you zero beam radiation in surface 2 (facing south), 
zero beam radiation during the morning on surface 4 (facing west), and 
zero beam radiation during the afternoon on surface.
Best regards,

Diego


Angela Marcela Fandino Sepulveda wrote:
> Dear Michael,
> My name is Angela Fandino. I am modeling a building with TRNSYS in
> Melbourne Australia (Southern Hemisphere). The building is facing North
> and I have been using the following Azimuths:
>
> Azimuth of surface 1 (facing North) = 0
> Azimuth of surface 2 (facing South) = 180
> Azimuth of surface 3 (facing East) = 90
> Azimuth of surface 4 (facing West) = 270.
>
> After looking at this link:
> http://sel.me.wisc.edu/trnsys/mailinglist/archive2003/msg00149.html
>
> it is a bit confusing for me to know if I am using the correct values.
> I was wondering if you could please advice/comment on it.
> I really appreciate your time and assistance.
>
> Kind Regards,
> Angela
>
>   


--

Diego A. Arias
TRNSYS Coordinator
Solar Energy Laboratory
University of Wisconsin - Madison
1500 Engineering Drive
Madison, WI 53706