Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:5:p18
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 5 (pt 18/36)
Character Range: 469512–473021

—           Discharge coefficient of SSV-CVS
C1      —           Carbon 1 equivalent hydrocarbon
d       m           Diameter
D0      m3/s        Intercept of PDP calibration function
D       —           Dilution factor
D       —           Bessel function constant
E       —           Bessel function constant
EE      —           Ethane efficiency
EM      —           Methane efficiency
EZ      g/kWh       Interpolated NOx emission of the control point
f       1/s         Frequency
fa      —           Laboratory atmospheric factor
fc      s–1         Bessel filter cut-off frequency
Fs      —           Stoichiometric factor
H       MJ/m3       Calorific value
Ha      g/kg        Absolute humidity of the intake air
Hd      g/kg        Absolute humidity of the dilution air
i       —           Subscript denoting an individual mode or instantaneous measurement
K       —           Bessel constant
k       m–1         Light absorption coefficient
kf                  Fuel specific factor for dry to wet correction
kh,D    —           Humidity correction factor for NOx for diesel engines
kh,G    —           Humidity correction factor for NOx for gas engines
KV                  CFV calibration function
kW,a    —           Dry to wet correction factor for the intake air
kW,d    —           Dry to wet correction factor for the dilution air
kW,e    —           Dry to wet correction factor for the diluted exhaust gas

Symbol   Unit          Term
kW,r     —             Dry to wet correction factor for the raw exhaust gas
L        %             Percent torque related to the maximum torque for the test engine
La       m             Effective optical path length
Mra      g/mol         Molecular mass of the intake air
Mre      g/mol         Molecular mass of the exhaust
md       kg            Mass of the dilution air sample passed through the particulate sampling filters
med      kg            Total diluted exhaust mass over the cycle
medf     kg            Mass of equivalent diluted exhaust over the cycle
mew      kg            Total exhaust mass over the cycle
mf       mg            Particulate sample mass collected
mf,d     mg            Particulate sample mass of the dilution air collected
mgas     g/h or g      Gaseous emissions mass flow (rate)
mse      kg            Sample mass over the cycle
msep     kg            Mass of the diluted exhaust sample passed through the particulate sampling filters
mset     kg            Mass of the double diluted exhaust sample passed through the particulate sampling filters
mssd     kg            Mass of secondary dilution air
N        %             Opacity
NP       —             Total revolutions of PDP over the cycle
NP,i     —             Revolutions of PDP during a time interval
n        min–1         Engine speed
np       s–1           PDP speed
nhi      min–1         High engine speed
nlo      min–1         Low engine speed
nref     min–1         Reference engine speed for ETC test
pa       kPa           Saturation vapour pressure of the engine intake air
pb       kPa           Total atmospheric pressure
pd       kPa           Saturation vapour pressure of the dilution air
pp       kPa           Absolute pressure
pr       kPa           Water vapour pressure after cooling bath
ps       kPa           Dry atmospheric pressure
p1       kPa           Pressure depression at pump inlet
P(a)     kW            Power absorbed by auxiliaries to be fitted for test
P(b)     kW            Power absorbed by auxiliaries to be removed for