MELBURY HE 3800-10000 -
Installation, Use and Maintenance
18.12.2020
Page 17 / 36
2.5.1. Melbury HE
Technical specifications Melbury HE, fuel oil
Melbury HE
3800 4500 5400 6300 7400 8600 10000
POWER
Boiler nominal power qN
(80/60°C)
max.
kW
3800 4500 5400 6300 7400 8600 10000
min.
1621 2012 2518 2930 3442 4163 5127
Calorific power qF
max.
kW
4160 4922 5887 6852 8047 9319 10785
min.
(2)
1706 2116 2649 3083 3621 4380 5393
Modulation rate at 80/60°C
(2)
%
41
43
45
45
45
47
50
EFFICIENCES
Overall efficiency 60/80°C
100%
%
91.4 91.4 91.7 91.9 92.0 92.3 92.7
Overall efficiency 50/70°C
30%
%
95.0 95.0 95.0 95.0 95.0 95.0 95.0
Overall efficiency 60/80°C
min qF
%
95.1 95.1 95.1 95.0 95.0 95.0 95.1
Efficiency DIN4702-8, 60/75°C
ɳ
N
%
94.8 94.8 94.9 94.9 94.9 95.0 95.0
MASS FLOW
Fuel oil flow
max.
(1)
kg/h
351.1 415.4 496.8 578.2 679.1 786.4 910.1
min.
(1) (2)
143.9 178.6 223.6 260.2 305.6 369.6 455.1
Exhaust gas mass flow
max. wet
kg/s
1.79 2.12 2.54 2.95 3.47 4.01 4.64
min. wet
(1) (2)
0.73 0.91 1.14 1.33 1.56 1.89 2.32
EXHAUST GAS DATA, LOSSES
Overpressure combustion chamber
max.
mbar 10.80 9.99 10.71 12.22 14.13 15.73 17.16
Exhaust gas temperature
at 80/60°C
max.
°C
198 196 190 185 185 178
169
min.
(2)
120
Exhaust gas losses at 80/60°C
max.
%
8.6
8.5
8.2
8.0
8.0
7.6
7.2
Stand-by loss qB
70°C
W 2724 3413 3827 4511 5118 5582 6043
HYDRAULIC DATA,
Water resistance
∆
t=15K
mbar
78
109 157
84
116
80
108
∆
t=20K
44
62
89
47
65
45
61
Water flow
max.
m
3
/h
218 258 309 361 424 493
573
mini
P/45 (P = Power in th / h provided at time t.)
Operating temperatures
max.
°C
95
SCO
110
Values acc. EN304 at:
- lambda = 1.2, CO
2
= 12.7%
- T-air = 20 °C, rel. humidity = 60%, p-baro = 100 kPa
(1)
: LCV = 11.85 kWh/kg
(2)
: Sulphur content up to 0.2%
figure 5 - Flue gas temperature diagram Melbury HE, fuel oil with clean boiler
