Environmental Engineering Reference
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kWh/m 2 a
900 < 900
925 - 975
975 - 1025
1025 - 1075
1075 - 1125
1126 - 1175
1175 - > 1200
2
< 1 100 kWh/m a
1 100 - 1 200 kWh/m a
1 200 - 1 300 kWh/m a
1 300 - 1 400 kWh/m a
> 1 400 kWh/m a
2
2
Vienna
2
2
Linz
Salzbur g
!
Innsbruck
Bre genz
!
!
Innsbr uck
!
Graz
Klagenfurt
!
!
Klagenfurt
Fig. 2.12 Distribution of mean values of total global radiation in Germany (above) and
Austria (below) (see /2-12/ (above) and /2-13/ (below))
The two courses of the daily radiated power are also shown in Fig. 2.13, taking
January, 30 th and October, 30 th as examples. These parts of the graphic clarify how
the radiation supply is distributed over the course of one day. The temporal distri-
bution of the radiant flux density for the day in January, for example, was defined
by an overcast sky throughout the entire day. The almost exclusively diffuse ra-
diation is characterised by a very low intensity. The 30 th of October, however, was
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