Report - DCE - Nationalt Center for Miljø og Energi

( ( ; ) ,
,
= 1 ,
,
⋅ +56
, ,
⋅ 3 ⋅ /) ⋅ () ,
where EBasis = fuel consumption/emissions in the basic situation, N = number
of engines, HRS = annual working hours, P = average rated engine size
in kW, LF = load factor, EF = fuel consumption/emission factor in g pr kWh,
i = machinery type, j = engine size, k = engine age, y = engine-size class and
z = emission level. The basic fuel consumption and emission factors are
shown in Annex 2.B.10.
The deterioration factor for a given machinery type, engine size and engine
age in year X depends on the engine-size class (only for gasoline), y, and the
emission level, z. The deterioration factors for diesel and gasoline 2-stroke
engines are found from:
,
,
') ,
,
( ; ) = ⋅ ') ,
/7
where DF = deterioration factor, K = engine age, LT = lifetime, i = machinery
type, j = engine size, k = engine age, y = engine-size class and z = emission
level.
For gasoline 4-stroke engines the deterioration factors are calculated as:
,
,
') ,
,
( ; ) = ⋅ ') ,
/7
The deterioration factors inserted in (18) and (19) are shown in Annex 2.B.10.
No deterioration is assumed for fuel consumption (all fuel types) or for LPG
engine emissions and, hence, DF = 1 in these situations.
The transient factor for a given machinery type, engine size and engine age
in year X, relies only on emission level and load factor, and is denominated
as:
7) ( ; ) = 7)
,
,
Where i = machinery type, j = engine size, k = engine age and z = emission
level.
The transient factors inserted in (20) are shown in Annex 2.B.10. No transient
corrections are made for gasoline and LPG engines and, hence, TFz = 1 for
these fuel types.
The final calculation of fuel consumption and emissions in year X for a given
machinery type, engine size and engine age, is the product of the expressions
17-20:
( ( ; ) ,
= ( ( ; ) ,
,
⋅7)
( ; ) ,
,
⋅ ( 1+
') ( ; ) ,
,
,
The evaporative hydrocarbon emissions from fuelling are calculated as:
( , , =
)&
⋅ () ,
)