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10.5 Above roof installation for sheet metal roofs
General information
Observe the information on securing collectors on page 97.
The fixing system comprises:
■ Mounting bracket
■ Mounting rails
■ Clamping brackets
■ Screws
The mounting brackets are secured with screws to the on-site sup-
port elements (matched to the individual sheet steel roof).
Mounting rails are fitted directly to the mounting brackets.
B
C
A
A
Vitosol-FM/-F, for vertical and horizontal installation
B
Vitosol-TM, for vertical installation
C
Vitosol-TM, for horizontal installation
Design information regarding flat roof installation
11.1 Determining the collector row spacing "z"
At sunrise and sunset (when the sun is very low), shading cannot be
avoided when collectors are arranged behind one another. To keep
the reduction in yield within acceptable parameters, observe specific
row spacing (dimension z) in accordance with VDI Guideline 6002-1.
When the sun is at its highest on the shortest day of the year
(21/12), the rows at the back should be free of shading.
The angle of the sun β (at midday) on 21/12 must be used to calcu-
late the row spacing.
In Germany, this angle lies between 11.5° (Flensburg) and 19.5°
(Constance), depending on latitude.
sin (180° – (α + β))
z
h
=
sinβ
z
h
h
β
α
α
z = Collector row spacing
h = Collector height (for dimensions see chapter "Specification" for
the relevant collector)
α = Angle of collector inclination
β = Angle of the sun
Example:
Würzburg is approximately located on latitude 50° north.
In the northern hemisphere, this value is deducted from a fixed angle
of 66.5°:
Angle β = 66.5° − 50° = 16.5°
Example with Vitosol-FM/-F, type SH
h = 1056 mm
α = 45°
β = 16.5°
1056 mm · sin (180°– 61.5°)
h · sin (180°– (α+β))
sin β
z =
sin 16.5°
z = 3268 mm
z =
α
Collector row clearance z in mm
Vitosol-FM/-F
Vitosol 300-
TM, type
SP3C
Vitosol 200-
TM, type SPEA
Type SV
Type SH
Flensburg
25°
6890
3060
6686
—
30°
7630
5715
7448
7511
35°
8370
3720
8154
—
45°
9600
4260
9373
9453
50°
10100
4490
9878
—
60°
10890
4830
10660
10750
Kassel
25°
5830
2590
5446
—
30°
6385
2845
5981
6032
35°
6940
3100
6471
—
45°
7840
3480
7299
7360
50°
8190
3640
7631
—
60°
8720
3870
8119
8187
Munich
25°
5160
2290
4862
—
30°
5595
2485
5290
5772
35°
6030
2680
5677
—
45°
6710
2980
6321
6993
50°
6980
3100
6571
—
60°
7350
3260
6921
7737
Design information regarding installation on pitched roofs — above roof installation
(cont.)
108
VIESMANN
VITOSOL
11
5822 440 GB