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LR, LRK, LR-NT, LRK-NT 21 - 32
We reserve the right to make changes to dimensions and construction 16 edition 30.10.2007
4.6.4. Pyronox LR (low-NOx version with internal flue gas recirculation, ARF)
Technical specifications LR (fuel oil, low NOx) with ARF
LR 21 22 23 24 25 26 27 28 29 30 31 32
Power
Boiler nominal power qN (80/60°C)
max.
4
380 430 470 585 600 755 935 935 1185 1455 1865 2325
min.
2,4
176 225 225 294 294 412 506 506 584 735 1025 1072
min.
3,4
142 180 180 237 237 336 409 409 478 598 842 875
Calorific power qF
max. 413 462 509 631 649 813 1008 1008 1284 1575 2009 2532
min.
2
186 237 237 310 310 434 533 533 616 774 1079 1129
min.
3
149 189 189 249 249 352 429 429 502 627 882 917
Modulation rate at 80/60 °C
2
45% 51% 47% 49% 48% 53% 53% 53% 48% 49% 54% 45%
3
36% 41% 37% 39% 38% 43% 43% 43% 39% 40% 44% 36%
Efficiencies
Overall efficiency 60 / 80 °C
100%
%
92.1 92.9 92.5 92.7 92.5 92.9 92.7 92.7 92.3 92.4 92.8 91.8
Overall efficiency 50 / 70 °C
30%
3
%
95.3 95.2 95.3 95.2 95.3 95.3 95.2 95.3 95.2 95.2 95.3 95.3
Mass flows
Fuel oil flow
max.
1
34.8 39.0 42.9 53.3 54.8 68.6 85.1 85.1 108.3 132.9 169.5 213.2
min.
1,3
15.6 15.9 15.9 21 21 29.7 36.2 36.2 42.4 52.9 74.5 77.4
Exhaust gas mass flow
max. wet 0.18 0.20 0.22 0.27 0.28 0.35 0.43 0.43 0.55 0.68 0.87 1.09
min. wet
3
0.06 0.08 0.08 0.11 0.11 0.15 0.18 0.18 0.22 0.27 0.38 0.40
Exhaust gas data, losses
Overpressure combustion chamber
max.
mbar
4.18 3.13 3.79 4.76 5.03 5.33 5.89 5.89 6.75 7.63 7.54 7.57
Exhaust gas temperature at 80/60 °C
max. 183 166 176 172 175 168 171 171 179 178 168 189
min.
2
121 121 121 121 122 121 123 123 124 124 123 124
min.
3
111 111 111 112 112 111 113 113 115 115 113 113
Exhaust gas losses at 80/60 °C
max.
%
7.6 6.8 7.3 7.1 7.2 6.9 7.1 7.1 7.5 7.5 7.0 8.0
Stand-by loss qB
70 °C
W
781 883 883 1020 1020 1177 1382 1382 1565 1742 2073 2330
Hydraulic data
Water resistance
Δt=10K
22 28 33 51 54 85 54 54 86 62 103 50
Δt=20K
6 7 8 13 14 21 14 14 21 16 26 13
Water flow
max. 32.6 36.9 40.4 50.3 51.6 64.9 80.3 80.3 101.8 125.0 160.2 199.8
Operating temperatures
max.
SCO
Values acc. EN304 at:
3zugskessel, V-07/06
- lamda=1.2, CO2=12.7%
OB
- T-air=20°C, rel. humidity=60%, p-baro=100kPa
1: LCV = 11.85 kWh/kg
2: Sulphur content up to 0.2%
3: Max. sulphur content 0.05% (500 ppm)
2: with 15% internal exhaust gas recirculation, constant amount at partial load.
kW
kW
mbar
kg/s
°C
kg/h
110
95
m3/h
°C
90
100
110
120
130
140
150
160
170
180
190
0 500 1000 1500 2000 2500
QN [kW]
[°C]
OB-ARF
LR21
LR22
LR23
LR24
LR25
LR26
LR27
LR28
LR29 LR30
LR32
LR31
Smax = 0.2%
Smax = 0.05% (500 ppm)
Smax = 50 ppm
Flue gas temperature diagram LR, low-NOx, fuel oil and ARF with clean boiler
© Copyright YGNIS AG CH-Ruswil
18


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