WinGD X62DF-S2.0 User Manual

Marine Installation Manual 2022-03 7-4
7 Engine Emissions
7.1 Exhaust gas emissions
X62DF-S2.0
The actual Sulphur Content (SC) of the fuel is a value stated by the fuel oil supplier
on the bunker delivery note.
The value for the molar mass ratio of sulphur to sulphur dioxide is assumed to be
equal to 2.0 as the majority of
SO
x
emissions are
SO
2
. Assuming that 5% of
SO
x
emissions are
SO
3
, this factor would change to 2.03. This illustrates that the equa-
tion is a good approximation for the real exhaust gas
emissions composition.
7.1.3 Regulation and calculation criteria for CO
2
emissions
The IMO strategy is to reduce CO
2
emissions for shipping by at least 40% by 2030
and a further reduction of up to 70% by 2050 (compared to the 2008 values). New
amendments to MARPOL Annex VI come into effect on 1
st
November 2022.
The new measures will require all ships to calculate their Energy Efficiency Ex-
isting Ship Index (EEXI) and to establish their annual operational Carbon Inten-
sity Indicator (CII) and CII rating.
CO
2
Calculation criteria
Currently, only CO
2
is considered in EEXI and CII. In the future, CO
2
-equiva-
lent
may be included in the CII. However, WinGD already provides CO
2
and
CO
2
-equivalent emission data. The total amount of CO
2
emissions (known as
CO
2
-equivalent) is the sum of fuel combustion and methane slip emissions.
For engines operating in gas mode, the CO
2
-equivalent
can be calculated with the
following formula:
Formula 7-3
For calculation of the
annual operational Carbon Intensity Indicator (CII)
, only
the
CO
2
emissions based on the fuel consumption must be considered
:
Formula 7-4
where:
m
CO2eq
........ =
CO
2
-equivalent emissions [kg/h]
m
CO2
...........=
CO
2
emissions [kg/h]
CH
4
............= Methane slip [g/kWh]
BSGC ..........= Brake Specific Gas Consumption [g/kWh]
CF
x
............= Conversion Factor
BSPC ..........= Brake Specific Pilot Fuel Consumption [g/kWh]
P
ME
............= Engine Power [kW]
GWP
CH4
..... = Global Warming Potential value for methane
2 4
44
(( ) )
1000
M
E
CO eq LNG MDO CH
P
mBSGCCHCFBSPCCFCHGWP 
2
()
1000
M
E
CO LNG MDO
P
m BSGC CF BSPC C F

WinGD X62DF-S2.0 Specifications

General

Brand	WinGD
Model	X62DF-S2.0
Category	Marine Equipment
Language	English