Vaillant auroTHERM exclusive VTK SERIES Installation Manual Page 67

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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%
5101520253035404550556065707580
ΔT
η
η Efficiency [%] ΔΤ Τ
collector
ambient air
Τ [K]
Pressure loss
160
140
120
100
90
60
40
20
0
Q [l/h]
Δp [mbar]
0 50 100 150 200 250 300 350 400 450 500
VTK 1140/2
VTK 570/2
Q Mass flow [l/h] Δp Pressure loss [mbar]
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