21
1.4
LOSS OF HEAD
1.3.2 “2R” boiler
Fig. 2
NOTE: The losses of head shown in the diagram were obtained with a
∆
t of 10°C
“1R” boiler
“2R” boiler
2R6
2R7
2R8
2R9
2R10
2R11
2R12
2R13
2R14
2R15
Output
kW
100.6
123.8
147.1
165.1
179.7
197.7
213.4
230.2
248.8
266.9
kcal/h 86,500 106,500 126,500 142,000 154,500 170,000 183,500 198,000 214,000 229,500
Input
kW
113.5
139.1
164.7
184.1
199.7
219.7
237.1
255.8
276.4
296.7
kcal/h 97,600
119,700 141,600 158,300 171,700 188,900 203,900 220,000 237,700 255,200
P (depth)
mm
735
835
935
1,035
1,135
1,235
1,335
1,435
1,535
1,635
Sections
n°
6
7
8
9
10
11
12
13
14
15
Max. water head
bar
5
5
5
5
5
5
5
5
5
5
Water content
l
92
107
122
136
151
165
180
194
209
223
Loss of head
Smoke
mbar
0.10
0.15
0.22
0.29
0.24*
0.37*
0.39*
0.42*
0.49*
0.50*
Water (
∆
t 10°C)
mbar
61.0
76.0
85.0
92.0
100.0
1,120
118.0
121.0
125.0
130.0
Comb. chamb. press.
mbar
– 0.02
– 0.02
– 0.01
– 0.02
– 0.02
– 0.01
– 0.02
0.31
0.35
0.50
Min. chimney depress.
mbar
0,12
0,17
0,23
0,31
0,26
0,38
0,41
0,73
0,84
1,00
Smokes temperature
°C
238
236
234
232
229
224
219
215
211
207
Smokes flow
m
3
n/h 105.2
129.2
153.3
171.9
186.9
205.4
221.6
238.9
257.9
276.6
Adjustment range
Heating
°C
30÷85
30÷85
30÷85
30÷85
30÷85
30÷85
30÷85
30÷85
30÷85
30÷85
Smoke volume
dm
3
83
92
101
110
119
128
138
147
157
167
Weight
kg
462
520
578
636
676
734
792
850
908
966
1
2
3
4
5
6
7
8
0
10
20
30
40
50
Portata m
3
/h
∆
p mbar
1R 4
1R 8
1R 7
1R 6
1R 5
1R 9
4
5
6
7
8
9
10 11 12 13 14
15 16 17 18 19
0
20
40
60
80
100
Portata m
3
/h
∆
p mbar
2R 6
2R 7
2R 9
2R 8
120
20 21 22 23
140
2R 10
2R 11
2R 12
2R 13
2R 14
2R 15
* Without baffles
Flow m
3
/h
Flow m
3
/h
