• GREET Fleet Footprint Calculator 2012 (586 kB xls)
• User Guide for GREET Fleet Footprint Calculator 2012 (193 kB pdf)

» Updated results to match GREET 1 2012 rev1 - Highlights include updated results for: developed land use change for cellulosic ethanol pathways, updated land use change for corn ethanol, added shale gas pathway, updated power plant efficiencies, and updated electricity generation mix for U.S.

» Added option to simulate algae-based biodiesel

» Added option to adjust the percentage North American natural gas that comes from conventional natural gas and shale gas resources

» Updated default annual hourly usage and load factors for off-road fleet equipment based on EPA’s non-road engine modeling

» For more details on these and other updates, please download and read the following document: GREET Fleet Footprint Calculator Version History (243 kB pdf)

The Department of Energy's Clean Cities Program has enlisted the expertise of Argonne to assist in measuring the petroleum displacement and greenhouse gas (GHG) emissions of medium- and heavy-duty vehicles and off-road equipment. Argonne has developed the GREET Fleet Footprint Calculator for Clean Cities stakeholders to estimate these values using simple spreadsheet inputs.

Based on GREET. The basis of this calculator is Argonne's Greenhouse gases, Regulated Emissions, and Energy use in Transportation (GREET) fuel-cycle model which is used to generate necessary petroleum use and GHG emission co-efficients of key fuel production pathways and combustion fuel types.

Well-to-Wheels Results. Fleet managers can quickly insert their data to generate petroleum use and GHG emissions on a well-to-wheels (WTW) basis. A WTW analysis can be divided into two stages: well-to-pump (WTP) and pump-to-wheels (PTW). The WTP stage starts with the fuel feedstock recovery, followed by fuel production, and ends with the fuel available at the pump, while the PTW stage represents the vehicle's operation activities. It is important to examine transportation fuels and technologies on a WTW basis in order to properly compare alternatives, as activities upstream of vehicle operation can use significant amounts of energy and subsequently produce a large amount of emissions.