Viessmann Vitosol
100 Technical Manual page 22

2.4 Selection of collector types
Vitosol 100
Calculating the distance between collector rows
Influence and consideration of shading
Initially, the angle of the sun is established,
accepting a partial shading of collector
rows arranged behind each other.
Example
Determining the angle of the sun for Berlin at the beginning of September.
1. At the horizontal level, draw a line to
the right at the latitude of Berlin.
2. The diagonal stripes at the r.h. edge of
the map represent the individual
months (starting and ending on the
st
21 day respectively, counting from
21.12. to 21.6. from right to left
and
from 21.6. to 21.12. from left to right).
Mark an x on the map in accordance
with the date within the relevant stripe
on the horizontal level.
55
54
Hamburg
53
Amsterdam Hannover
52
GERMANY
Cologne
51
Frankfurt
50
49
Stuttgart
48
Zurich
47
SWITZERLAND
46
45
5 6 7 8 9
Eastern longitude in °
22
The following graphic allows you to check
the approximate values for this angle,
subject to the latitude and date.
3. From this mark, draw a vertical line
downwards. The respective angle of
the sun can now be checked against
the scale (o).
The angle is approx. 42º (the same angle
of the sun also applies to early April in
Berlin).
Schwerin
Berlin
Magdeburg
Dresden
Erfurt
Nürnberg
Munich
AUSTRIA
10 11 12 13 14 15 16
70 60 50 40 30
Vienna
70 60 50 40 30
Angle of the
position of the sun º
20 10
20 10
VITOSOL