Bosch UT-L 12 - Page 31

Technical description | 31
6 720 807 794 (2013/04)UNIMAT
UNIMAT UT-L boiler with condensing heat exchanger
Fig. 22 Flue gas temperatures for UNIMAT UT-L boilers subject to the boiler load — overview 2
η
K
Boiler efficiency
ϑ
A
Flue gas temperature
Q
B
Rated heating output
UNIMAT UT-L boiler
Fig. 23 Flue gas temperatures for UNIMAT UT-L boilers
subject to the boiler load and the water inlet
temperature into the condensing heat exchanger
(averages for the series)
a Water inlet temperature into the condensing heat
exchanger of 60 °C
b Water inlet temperature into the condensing heat
exchanger of 30 °C
ϑ
A
Flue gas temperature
ϕ
K
Boiler load
220
210
200
190
180
170
160
150
0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000
91,1
91,5
92,0
92,4
92,9
93,3
93,7
94,1
UT-L 2
UT-L 12
UT-L 16
UT-L 20
UT-L 22
UT-L 26
UT-L 32
UT-L 36
UT-L 38
UT-L 44
UT-L 48
UT-L 52
UT-L 56
UT-L 62
h
K
[%]
Q
K
[kW]
6 720 803 977-09.1ITL
UT-L 6/UT-L 8
150
140
130
120
110
100
90
80
70
60
50
25 50 75 100
ϑ
A
[°C]
ϕ
K
[%]
6 720 642 347-28.1il
b
a