Procedure To Refer Burner Operating Condition At An Altitude And/Or At A Combustion Supporter Air Temperature Different To The Standard Values (328 Ft Above Sea Level, 68 - Riello RLS 190/E Installation, Use And Maintenance Instructions

3.6.1 Procedure to refer burner operating condition
at an altitude and/or at a combustion supporter
air temperature different to the standard values
(328 ft above sea level, 68 °F).
Altitude Altitude bar. press.
ft a.s.l. m a.s.l. "w.c.
0 0 399
328 100 394
1.000 305 385
2.000 610 371
3.000 915 358
4.000 1.220 345
5.000 1.525 332
6.000 1.830 320
7.000 2.135 307
8.000 2.440 294
F - correction factor of discharge head and delivery in relation to temperature and altitude.
Reference conditions:
–
Air temperature 68 °F (20 °C)
– Barometric pressure 394 ''w.c. (1000 mbar)
– Altitude 328 ft a.s.l. (100 m a.s.l.)
Technical description of the burner
bar. press. 0 5
mbar 32 41
1013,00 1,087 1,068
1000,00 1,073 1,054
977,40 1,049 1,030
942,80 1,012 0,994
908,20 0,975 0,957
875,80 0,940 0,923
843,50 0,905 0,889
811,85 0,871 0,856
779,80 0,837 0,822
747,80 0,803 0,788
9 GB
AIR TEMPERATURE
10 15 20
50 59 68
1,049 1,031 1,013
1,035 1,017 1,000
1,012 0,994 0,977
0,976 0,959 0,943
0,940 0,924 0,908
0,907 0,891 0,876
0,873 0,858 0,844
0,841 0,826 0,812
0,807 0,793 0,780
0,774 0,761 0,748
Example
Using the , for an altitude of 3,000 ft and an air temperature of 68
°F, an F factor value is obtained equal to 0.908;
if the capacity at the boiler furnace is Qfoc = 4,500 Mbtu/h, the cor-
rect output will be equal to:
Qburner = Qfoc / F = 4,500 / 0.908 = 4,956 Mbtu/h
25 30 40
77 86 104
0,996 0,980 0,948
0,983 0,967 0,936
0,961 0,945 0,915
0,927 0,912 0,883
0,893 0,878 0,850
0,861 0,847 0,820
0,829 0,816 0,790
0,798 0,785 0,760
0,767 0,754 0,730
0,735 0,723 0,700
Tab. F
20095074
°C
°F