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Gasoline Gallon Equivalents (GGE) for Alternative Fuels
Fuel British Thermal Unit (Btu) Estimates for Transportation Vehicles (Lower Heating Values)
|British Thermal Units |
Per Unit of Fuel (rounded)
|Alt Fuel Unit in |
Gasoline Gallon Equivalents
|Alt Fuel Unit in |
Diesel Gallon Equivalents
|Example for Converting into GGE|
|Diesel Gallon||127,500||1.140||1.000||5 Diesel Gallons = 5.7 GGEs||5 x 1.14|
|Gasoline Gallon1||111,800||1.000||0.877||GGE = Gasoline Gallon|
|Liquefied Natural Gas (LNG) Gallon||71,100||0.636||0.558||12 LNG Gallons = 7.632 GGEs||12 x 0.636|
|Compressed Natural Gas (CNG) Therm||93,000||0.832||0.729||10 CNG Therms = 8.32 GGEs|
|E85 Gallon |
85% Ethanol, 15% gasoline
|81,700||0.731||0.641||10 E85 Gallons = 7.31 GGEs|
|B20 Gallon |
20% biodiesel, 80% diesel
|125,400||1.122||0.984||10 B20 Gallons = 11.22 GGEs|
|B100 Gallon |
|117,100||1.047||0.918||15 B100 Gallons = 15.705 GGEs||15 x 1.047|
|Liquefied Petroelum Gas (LPG/Propane) Gallon||83,200||0.744||0.653||15 LPG Gallons = 11.16 GGEs||15 x 0.744|
|Hydrogen Gallon||27,800||0.249||0.218||10 Hydrogen Gallons = 2.49 GGEs|
|Electricity (kilowatt-hours/kWh)||3,412||0.031||0.027||100 kWh of Electricity = 3.1 GGEs|
- Gasoline value is a revised number not yet endorsed by California Energy Commission.
California Energy Commission, Transporation Energy Division, Fossil Fuels Office
Table 2-5, Pg. 2-16, Full Fuel Cycle Assessment Well to Tank Energy Inputs, Emissions, and Water Impacts, TIAX Consultant Report,
February 2008, publication # CEC-600-2007-002-D, www.energy.ca.gov/2007publications/CEC-600-2007-002/CEC-600-2007-002-D.PDF
Note: For transportation applications Lower Heating Values are used. Listed values are consistent with GGE conversions performed in the 2009 Integrated Energy Policy Report with regards to transportation issues. Estimates may not reflect the sales-weighted average for California for any specific year. In reality, these numbers vary based on feedstock supply and specifications. Numbers were generated based on California Air Resources Board-approved specification for gasoline prior to 2007, which have since been revised.
Other potential sources for Gasoline Gallon Equivalents conversions: Argonne National Laboratory's GREET Model, California Air Resources Board (CARB), U.S. Dept. of Energy: Energy Information Administration Clean Cities Reports.