7
Tab. no. 3a) Thermal - technical parameters of G 42 boiler equipped with SINGLE STAGE or
DOUBLE STAGE GAS VALVE and designated for NATURAL GAS combustion
(thermal power 34,16 MJ.m
-3
, gas temperature 15 °C and bar. air pressure 1013,25 mbar)
Number of sections
pc
2
3
4
5
6
7
Rated heat output maximum
kW
8
17
26
34
41
49
Rated heat output minimum
kW
-
12
18
27
35
42
Rated heat input maximum
kW
8,84
18,78
28,02
37,20
44,85
53,18
Rated heat input minimum
kW
-
13,18
19,66
29,8
38,34
45,90
Gas volume flow rate at maximum heat output
m
3
.h-1
0,932
1,980
2,953
3,920
4,727
5,605
Gas volume flow rate at minimum heat output
m
3
.hod
–1
-
1,390
2,072
3,141
4,041
4,837
Gas volume flow rate at maximum heat output
dm
3
.min
-1
15,53
33,0
49,22
65,33
78,78
93,42
Gas volume flow rate at minimum heat output
dm
3
.min
-1
-
23,17
34,53
52,35
67,35
80,62
Efficiency at maximum heat output
%
90,5 – 93
Efficiency at minimum heat output
%
90,5 – 91,5
No
x
category
2
Combustion products temperature in smoke
flue at maximum heat output
°C
90 – 120
Combustion products temperature in smoke
flue at minimum heat output
°C
80 – 90
Real volume of dry combustion products at
maximum heat output
m
3
.m
-3
17,80
23,33
19,23
23,89
20,66
18,25
Real volume of dry combustion products at
minimum heat output
m
3
.m
-3
-
25,09
27,52
28,67
23,65
25,09
Connecting gas overpressure
mbar
20
Gas overpressure on burner nozzles at
maximum heat output
mbar
13,7
13,2
15,8
14,2
14,7
14,3
Gas overpressure on burner nozzles at
minimum heat output
mbar
-
6,8
7,8
8,9
10,8
10,6
Number of cool. sticks on a tube
pc
2
3
3
3
3
3
Number of nozzles
pc
1
2
3
4
5
6
Nozzles diameter
mm
2,4
2,52
2,52
2,52
2,45
2,45
Connecting gas overpressure
mbar
13
Gas overpressure on burner nozzles at
maximum heat output
mbar
10
10
11
11
11,7
11,5
Gas overpressure on burner nozzles at
minimum heat output
mbar
4,6
4,7
4,8
6,8
8,8
8,6
Number of cool. sticks on a tube
pc
2
3
3
3
3
3
Number of nozzles
pc
1
2
3
4
5
6
Nozzles diameter
mm
2,7
2,7
2,7
2,7
2,7
2,7
Note: At a single stage valve the heat output is pre-set by the manufacturer to the maximum.
Tab. no. 3b) Thermal - technical parameters of G 42 boiler equipped with SINGLE STAGE GAS
VALVE and designated for PROPANE combustion
(thermal power 87,75 MJ.m
-3
, gas temperature 15 °C a bar. air pressure 1013,25 mbar)
Number of sections
pc
2
3
4
5
6
7
Rated heat output
kW
7
14
21
26
33
40
Rated heat input
kW
7,73
15,21
22,82
28,32
35,90
43,79
Fuel volume rated flow
m
3
.h-1
0,317
0,624
0,936
1,162
1,473
1,796
Fuel volume rated flow
dm
3
.min
-1
5,28
10,40
15,60
19,37
24,55
29,93
Boiler efficiency
%
90,5 – 92
No
x
category
2
Combustion products temperature in smoke
flue
°C
90 – 110
Real volume of dry combustion products
m
3
.m
-3
46,42
59,5
95,87
67,3
58,55
56,15
Connecting fuel overpressure
mbar
30
Gas overpressure on burner nozzles
mbar
27,5
28,5
28
27
27,5
27,5
Number of cool. sticks on a tube
pc
2
3
2
3
3
3
Number of nozzles
pc
1
2
3
4
5
6
Nozzles diameter
mm
1,55
1,55
1,5
1,5
1,5
1,5
Содержание GARDE G 42 ECO
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