39
Installation manual auroTHERM 0020077994_00
10 Technical
data
Units
VTK 570/2
VTK 1140/2
Number of vacuum tubes
6
12
η
0
(aperture), DIN4757-4 or EN12975
%
64.2
c
1
with wind, relative to aperture
W/(m
2
k)
0.885
c
2
with wind, relative to aperture
W/(m
2
k
2
)
0.001
K
θ
,trans
(50°), relative to aperture
1
K
θ
,long
(50°), relative to aperture
0.9
Predicted energy gain (location Würzburg, 5m
2
aperture, 300l cylinder, 4 persons)
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 solar circuit
l/h
180
Absolute pressure in hard vacuum
bar
10
-5
mbar (= 10
-8
bar)
Absorber absorption alpha
> 93.5% (see also ITW test report)
Absorber emission epsilon
< 6% (see also ITW test report)
Modular 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
Operating overpressure, max. permissible
bar
10
10
Standstill temperature, max.
°C
295
Connection diameter, supply/return
mm
15
Collector material
Al / Cu / Glass / Silicon / PBT / EPDM / TE
Glass tubing material
Borosilicate 3.3
Selective absorber coating material
Aluminium nitrite
Glass tubing (outer dia./inner dia./wall thickness/tube
length)
47 / 37 / 1.6 / 1500
Colour (plastic parts)
Black
Thermal shock test
ITW test number
02COL282
Hail impact test per DIN EN 12975-2
TÜV test number
435/142448
Type approval number
01-228-770
Table 10.1 Technical data
Technical data 10
GB
Summary of Contents for auroTHERM VTK 570/2
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