Technical data 10
0020077994_02 auroTHERM exclusive Installation manual
67
Efficiency of the VTK 570/2 and the VTK1140/2 at a solar energy input EG of 800 W/m
2
0
0%
10%
20%
30%
40%
50%
60%
70%
80%
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
Δ
T
η
η
Efficiency [%]
ΔΤ
Τ
collector
−
ambient air
Τ
[K]
Pressure loss
160
140
120
100
90
60
40
20
0
Q [l/h]
Δ
p [mbar]
0
50
100
150
200
250
300
350
400
450
500
VTK 1140/2
VTK 570/2
Q
Mass flow [l/h]
Δ
p
Pressure loss [mbar]