AW: radiation processor type 16e

["Martin Gut" <gut@xxxxxxxxxxxxxx>]

Dear Martin,

The angle of incidence of beam raditation on surface is between the normal of the surface and the beam direction.
For an horizontal surface it's the same as the zenith angle, which is ( 90°-elevation angle). So the incidence angle
has it's minimum at solar noon .

Regards Martin Gut

-----Ursprüngliche Nachricht-----
Von: Martin Föttinger [mailto:foettinger@ifbsorge.de]
Gesendet: Freitag, 11. Juli 2003 12:18
An: trnsys@relay.doit.wisc.edu
Betreff: radiation processor type 16e


Dear trnsys-users,

does anybody knows the physicial definition of the
"angle of incidence of beam raditation on surface"?
(output number 10, 15 ... of type 16e)

For a vertical surface with an orientation faced south the
incidence angle becomes smaller during the day (time = June 21th).
At the solar high noon he reaches the lowest value. In my opinion
this angle should reach the maximum at the solar hig noon and
decreases in progression of the remaining day?

Thank you for your help in advance.

Best regards,

Martin Foettinger

---------------------------------
Martin Foettinger Dipl.-Ing. (FH)
Project Manager

Wolfgang Sorge
Ingenieurbüro für Bauphysik GmbH
Suedwestpark 42
D-90449 Nuremberg
Germany
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