Technical data 10
0020077994_03 auroTHERM exclusive Installation manual
51
10 Technical data
10.1
Technical data table
Unit
VTK 570/2
VTK 1140/2
Number of tubes
−
6
12
η
0
(Aperture), DIN4757-4 or EN12975
%
64.2
c
1
with wind, or on aperture
W/(m
²
k)
0.885
c
2
with wind, or on aperture
W/(m
²
k
²
)
0.001
K
θ
,trans
(50°), or on aperture
−
1
K
θ
,long
(50°), or on aperture
−
0.9
Yield forecast (location: Würzburg, 5 m
²
aperture,
300 litre cylinder, 4 people)
kWh/m
²
a
586
Peak output per collector module W
peak
W
642
1278
Area-related heat capacity c
kJ/(m
²
k)
8.3
Volume flow (per m
²
of collector surface)
l/(m
²
h)
24
Minimum volume flow in the solar circuit
l/h
180
Absolute pressure in the high vacuum
bar
10
-5
mbar (= 10
-8
bar)
Alpha absorber absorption
−
> 93.5% (see also ITW test report)
Epsilon absorber emission
−
< 6% (see also ITW test report)
Grid dimensions (length x height x depth)
m
0.7 x 1.65 x 0.11
1.39 x 1.65 x 0.11
Gross area
m
²
1.16
2.30
Aperture surface area
m
²
1.0
2.0
Absorber surface area
m
²
1.0
2.0
Collector capacity
l
0.9
1.8
Weight
kg
19
37
System overpressure, max. permissible
bar
10
Shutdown temperature, max.
°C
272
Connection width, flow/return
mm
15
Material for the tube collector
−
Al/1.4301/glass/silicone/PBT/EPDM/TE
Material for glass tubes
−
Borosilicate 3.3
Material for selective absorber layer
−
Aluminium nitride
Glass tubes (outer diameter/inner diameter/wall
thickness/tube length)
−
47 / 37 / 1.6 / 1500
Colour (plastic parts)
−
Black
Thermal shock test
ITW test
number
02COL282
Hail impact test in accordance with DIN EN 12975-2
TÜV test
number
435/142448
Type approval number
−
01-228-770
Max. wind load
kg/Nm
2
1.2
Max. standard snow load
kg/Nm
2
5
On-roof installation angle
°
15-75
Flat roof installation angle
°
30, 45, 60
