Dimplex SOLAR ST0133 - Manual (Page 19)

Technical manual
Page 19 of 72
ST0133 – A 02/09
SOLAR
Figure 18 – Dimplex SOLC220 integrated roof kit without and with flashing kit fitted
Free standing kits
The free standing kit is designed for the vertical installation of the solar collector on
even ground with a slope of 45° to 60°. For lower sloping angles shorted support struts
can be ordered, allowing the collector to slope between 30° and 40°.
As shown in Figure 24, the free standing mounting kit is usually fixed at 4 individual
points. Alternatively a U – section rail is available as accessory aiding on uneven ground
or for suspended installation.
When more than one row of solar collectors is being installed it is important to minimise
the impact of shading of one row to the other. Equation 2 can be used to calculate the
optimum row spacing to avoid shading at solar noon on the least favourable day of the
year, i.e. 21
st December.
( ) ( )
s
s
mm
c p
α
α β
sin
180 sin 1870
_
+ − ° ⋅
= [2]
Where: p_c [mm] pitch between collector rows
β [°] sloping angle of solar collector
α
s
[°] solar altitude angle
The solar altitude angle can be calculated applying Equation 3 or approximating it from
Figure 19.
) 45 . 23 sin sin 45 . 23 cos (cos 90 ° ⋅ + ° ⋅ − ° = φ φ α
s
[3]
Where:
α
s
[°] solar altitude angle
φ [°] latitude of installation
Integrated roof kit
without flashings fitted Integrated roof kit
with flashings fitted