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Re: [TRNSYS-users] Azimuth



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