Code of Federal Regulations Title 40. Protection of Environment 40 CFR Pt. 91, Subpt. D, App. A Appendix A to Subpart D of Part 91—Tables

A_YM

Final weighted emission test results

g/kW-hr

C₃H₈

Propane

C_B

Concentration of emission in background sample

ppm

C_D

Concentration of emission in dilute sample

ppm

CO

Carbon monoxide

CO₂

Carbon dioxide

conc

Concentration (ppm by volume)

ppm

D_X

Density of a specific emission (XX)

g/m³

DXX

Volume concentration of a specific emission (XX) on a dry basis

percent

DF

Dilution factor of dilute exhaust

D1

Water vapor mixture concentration

percent

f

Engine specific parameter considering atmospheric conditions

G_AIRD

Intake air mass flow rate on dry basis

kg/h

G_Fuel

Fuel mass flow rate

kg/h

GP

Analyzer standard operating pressure

Pa

G_s

Mass of carbon measured during a sampling period

g

H

Absolute humidity (water content related to dry air)

gr/kg

H₂

Hydrogen

i

Subscript denoting an individual mode

IT

Indicated torque

N-m

K

Wet to dry conversion factor

K_H

Humidity correction factor

K_V

Calibration coefficient for critical flow venturi

M_X

Molecular weight of a specific molecule(XX)

g/mole

mass

Pollutant mass flow

g/h

M_FUEL

Mass of fuel consumed during a sampling period

g

N

Pump revolutions during test period

revs

N₂

Nitrogen

NO

Nitric oxide

NO₂

Nitrogen dioxide

NO_X

Oxides of nitrogen

O₂

Oxygen

O₂I

Oxygen concentration of the burner air

percent

P

Absolute pressure

kPa

P_AUX

Declared total power absorbed by auxiliaries fitted for the test

kW

P_B

Total barometric pressure (average of the pre-test and post-test values)

kPa

P_dew

Test ambient saturation vapor pressure at the dew point

kPa

P_e

Absolute pump outlet pressure

kPa

P_ED

Pressure drop between the inlet and throat of metering venturi

kPa

P_i

P_i=P_M,i + P_AUX,i

P_M

Maximum power measured at the test speed under test conditions

kW

P_P

Absolute pump inlet pressure

kPa

P_PI

Inlet pressure depression of venturi or pump

kPa

P_PO

Pressure head at CVS pump outlet

kPa

P_s

Dry atmospheric pressure

kPa

P_V

Absolute venturi inlet pressure

kPa

P_wb

Saturated vapor pressure

Pa

Q_C

Volumetric flow rate of dilute exhaust through CVS at STP

m³/hr

Q_S

Gas flow rate

m³/min

R_STP

Ideal gas constant at STP

m³/mole

R₂

Fuel carbon weight fraction

g/g

STP

Standard temperature and pressure

t

Elapsed time for test period

sec.

T

Absolute temperature at air inlet

°C

T_a

Ambient temperature

°C

T_EI

Air temperature in to metering venturi or flowmeter

°C

T_K

Absolute temperature

K

T_P

Absolute pump inlet temperature

°C

T_PI

Air temperature at CVS pump inlet

°C

T_PO

Air temperature at CVS pump outlet

°C

T_V

Absolute venturi inlet temperature

°C

V_O

Pump flow

m³/rev

W

Average mass flow of emissions

g/hr

W_X

Mass rate of specific emission (XX)

g/hr

WXX

Volume concentration in exhaust of specific emission (XX) on wet basis

ppm, ppmC, %

WF

Weighing factor

Z1

Water concentration

percent

α

Fuel specific factor representing the hydrogen to carbon ratio

1

Engine speed

±2%

±2%

Monthly.

2

Torque

±5%

Monthly.

3

Fuel consumption

±1%

±5%

Monthly.

4

Air consumption

±2%

±5%

As required.

5

Coolant temperature

±2 °C

Same

As required.

6

Lubricant temperature

±2 °C

Same

As required.

7

Exhaust back pressure

±5%

Same

As required.

8

Inlet depression

±5%

Same

As required.

9

Exhaust gas temperature

±15 °C

Same

As required.

10

Air inlet temperature (combustion air)

±2 °C

Same

As required.

11

Atmospheric pressure

±0.5%

Same

As required.

12

Humidity (combustion air) (relative)

±3.0%

Same

As required.

13

Fuel temperature

±2 °C

Same

As required.

14

Temperature with regard to dilution system

±2 °C

Same

As required.

15

Dilution air humidity

±3% absolute

Same

As required.

16

HC analyzer

±2%²

Same

Monthly.

17

CO analyzer

±2%²

Same

Monthly.

18

NO_X analyzer

±2%²

Same

Monthly.

19

NO_X converter check

90%

Same

Monthly.

20

CO₂ analyzer

±2%²

Same

Monthly.

Sulfur, ppm max

1000

D 2622

Benzene, max. percent

1.5

D 3606

RVP, psi

8.6

±0.6

D 323

Octane, R+M/2

89.9

±3.1

D 2699

D 2700

IBP, °C

32.8

±11.0

D 86

10% point, °C

53.3

±5.5

D 86

50% point, °C

101.7

±8.3

D 86

90% point, °C

160.0

±11.1

D 86

End Point, max. °C

212.8

D 86

Phosphorus, g/l, max

0.02

D 3231

Lead, g/l, max

0.02

Manganese, g/l, max

0.004

Aromatics, max. percent

35

D 1319

Olefins, max. percent

10

D 1319

Saturates, percent

remain

D 1319