Specifications

32 Fuels
Holland I Holland II
Osthannover (East
Hanover)
Rel. density
––
0.64 0.64 0.64
Ws,n
kWh/m
3
N
12.2 12.7 11.3
Methane number
Methane no. (±2)
90 86 101
Requirements for fuel gas
Requirements and marginal conditions fuels and fuel supply (Table 18)
Designation Unit Limit Value Remarks
Type of gas
Natural gas Applies to natural gas H and L, other
gases are currently not approved
Methane number
––
≥ 70
Combustion knock, gas analysis and
consultation with manufacturer
Calorific power Hu kWh/m³
N
8.0< Hu <11.5
Consultation with manufacturer required
in case of lower values.
Calorific value deviation
from the setting value
%
±5
Consultation with manufacturer required
for higher values
Permissible change speed
of calorific value
kWh/m³
N
/h
0.5 Linear constant change required
Density of gas kg/m³
N
0.73-0.84
The density of the gas can fluctuate in
accordance with the composition; it is
constant for a certain t ype of gas. When
using gas from different gas supply areas,
the density may vary. When changing
the gas supplier, a gas analysis is
necessary; an adaptation of the mixture
control may be necessary.
Setting value for gas
pressure, gas train entry
mbar 80-200
Observe the specifications for the gas
train corresponding to the project
Gas pressure deviation
from the setting value
%
±5
Permissible change speed
of gas pressure
mbar/min.
0.08
Constant change required
Gas temperature °C
10< T <40
Condensation of water vapor at <10 °C,
thermal aging of NBR materials (seals,
diaphragms) and influence on elasticity
characteristics at higher temperatures
Gas temperature deviation
from the setting value
°C
±9
Permissible change speed
of gas temperature
K/min.
0.3
Rel. gas humidity in gas at
20 °C
%
<30 No steam condensation in the pressure
and temperature range; for higher values,
a gas drying system must be provided
A001061/33E 08-01 ©MTU
TIM ID: 0000010137 – 007