Mobile6.2 Heavy-Duty Truck Energy and Emissions Factors

The operational factors for heavy-duty vehicles were determined with Mobile6.2 and are shown in Table D-9 and Table D-10. Default Mobile6.2 values were used for these vehicles.

GREET and Mobile6.2 Comparison

The GREET vehicle operation factors can be compared against Mobile6.2’s to evaluate the accuracy of particular vehicles. GREET assumes default emission factors for conventional gasoline and diesel vehicles and the operating conditions of the vehicles is not transparent. Mobile6.2 is designed to model emissions from conventional fuel vehicles and low level ethanol blends and provides the ability to adjust many vehicle operation and fuel characteristics in determining emission factors. Table D-11 and Table D-12 compare the GREET default conventional gasoline and diesel vehicle emissions against Mobile6.2. The lack of transparency in the vehicle and operating characteristics used to generate GREET factors results in some difficulty in verification using Mobile6.2. In 2005, GREET assumes low-sulfur concentrations of 26 ppm in gasoline and 200 ppm in conven-

TABLE D-9 Mobile6.2 Energy and Emission Factors for Heavy-Duty Vehicles in 2005

 

Total Energy

CO2

VOC

NOx

PM2.5

SOx

Btu/VMT

g/VMT

g/VMT

g/VMT

g/VMT

g/VMT

HDGV2A

12500

888

1.79

4.13

0.07

0.05

HDGV2B

12500

888

1.79

4.13

0.07

0.05

HDGV3

13587

963

2.47

4.71

0.08

0.06

HDGV4

14205

1005

5.30

5.90

0.07

0.06

HDGV5

15823

1124

3.10

5.40

0.06

0.06

HDGV6

15823

1119

2.91

5.30

0.07

0.07

HDGV7

17123

1217

3.43

6.09

0.07

0.07

HDGV8A

18382

1296

4.05

6.79

0.00

0.00

HDDV2A

10195

795

0.23

3.99

0.12

0.01

HDDV2B

10195

795

0.23

3.99

0.12

0.01

HDDV3

11250

879

0.25

4.44

0.13

0.01

HDDV4

12921

1004

0.31

5.41

0.11

0.01

HDDV5

13316

1036

0.32

5.68

0.25

0.01

HDDV6

15000

1176

0.47

7.99

0.26

0.01

HDDV7

17400

1354

0.58

9.94

0.33

0.01

HDDV8A

20077

1561

0.56

12.89

0.36

0.02

HDDV8B

21048

1647

0.66

15.10

0.36

0.02



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