Viessmann Vitosol
100 Technical Manual page 23

h
a
z = Collector row distance
h = Collector height
a = Collector angle of inclination
b = Angle of the sun (see page 22)
The following applies to these calculations:
sin (180° * (a ) b))
z
+
sin b
h
Example 1
Type w 2.5
h = 1105 mm
a = 45º
b = 42º (position of the sun at the
beginning of September, Berlin,
see page 22)
h @ sin (180° * (a ) b))
z +
sin b
1105 mm @ sin (180° * 87°)
z +
sin 42°
z = 1649 mm
Note
Select the angle of the sun so that, at noon
on the 21.12., the sun can hit the collector
surface without shade. Subject to latitude,
in Germany this angle lies between 12º
(Flensburg) and 20º (Freiburg).
VITOSOL
h
a
b
z
Example 2
Type s 2.5
h = 2.352 mm
a = 45º
b = 14º (position of the sun 21.12.,
Berlin, see page 22)
h @ sin (180° * (a ) b))
z +
sin b
2352 mm @ sin (180° * 59°)
z +
sin 14°
z = 8.333 mm
2.4 Selection of collector types
Vitosol 100
23