Gas Pressure - Riello Burners RS 190 Instrucciones De Instalación, Funcionamiento Y Mantenimiento

RS 190
kW 1 2
1280 7,0 1,8
1400 7,3 2,0
1500 7,6 2,2
1600 8,0 2,5
1700 8,7 2,8
1800 9,3 3,0
1900 10,2 3,2
2000 11,3 3,4
2100 12,5 3,7
2290 15,0 4,3
(A)
(B)
∆p (mbar)
3
3970146 3970181 3970147
3970160 3970182 3970161
30,0 25,0 11,0
35,0 29,0 15,0
40,0 32,0 16,0
45,0 35,0 17,0
52,0 38,5 19,0
58,0 42,0 21,0
63,0 46,0 23,0
68,0 50,0 25,0
74,0 53,0 27,5
88,0 60,0 34,0
3970148 3970149
3970162 3970163
5,6 -
7,0 -
8,0 -
9,0 4,5
10,0 4,7
11,0 5,0
12,0 5,8
13,0 6,1
14,0 6,8
17,0 8,0
D1263
5

GAS PRESSURE

The adjacent table shows minimum pressure
losses along the gas supply line depending on
the burner output in 2nd stage operation.
Column 1
Pressure loss at combustion head.
Gas pressure measured at test point 1)(B), with:
• Combustion chamber at 0 mbar
• Burner operating in 2nd stage
• Combustion head adjusted as indicated in
diagram (C)p. 7.
Column 2
Pressure loss at gas butterfly valve 2)(B) with
maximum opening: 90°.
Column 3
Pressure loss of gas train 3)(B) includes: adjust-
ment valve VR, safety valve VS (both fully
open), pressure governor R, filter F.
The values shown in the various tables refer to:
natural gas G20 PCI 10 kWh/Nm
With:
natural gas G25 PCI 8.6 kWh/Nm
multiply tabulated values by 1.3.
Calculate the approximate 2nd stage output of
the burner thus:
- Subtract the combustion chamber pressure
from the gas pressure measured at test point
1)(B).
- Find the nearest pressure value to your result
in column 1 of the table (A).
- Read off the corresponding output on the left.
Example:
• 2nd stage operation
• Natural gas G20 PCI 10 kWh/Nm
• Gas pressure at test point 1)(B)
• Pressure in combustion chamber = 3 mbar
A 2nd stage output of 1600 kW shown in Table
(A) corresponds to 8 mbar pressure, column 1.
This value serves as a rough guide, the effective
delivery must be measured at the gas meter.
To calculate the required gas pressure at test
point 1)(B), set the output required from the
burner in 2nd stage operation:
- Find the nearest output value in the table (A).
- Read off the pressure at test point 1)(B) on
the right in column 1.
- Add this value to the estimated pressure in
the combustion chamber.
Example:
• Required burner output in 2nd stage opera-
tion: 1600 kW
• Natural gas G20 PCI 10 kWh/Nm
• Gas pressure at burner output of 1600 kW,
taken from table (A), column 1
• Pressure in combustion chamber = 3 mbar
pressure required at test point 1)(B).
3 3
(8.6 Mcal/Nm ).
3 3
(7.4 Mcal/Nm )
3
= 11 mbar
11 - 3= 8 mbar
3
= 8 mbar
8 + 3 = 11 mbar