Publication Details

Title : GREET 1.5 — Transportation Fuel-Cycle Model, Volume 1: Methodology, Development, Use, and Results
Publication Date : August 01, 1999
Authors : M. Wang
Abstract : This report is a revision to a previous Argonne National Laboratory report entitled GREET 1.0
— Transportation Fuel Cycles Model: Methodology and Use (dated June 1996). The 1996
report documented the methodologies, key assumptions, and results of the development and use
of the first version of the Greenhouse Gases, Regulated Emissions, and Energy Use in
Transportation (GREET) fuel-cycle model developed at Argonne National Laboratory. Since
then, the GREET 1.0 model has been significantly expanded and improved. The model has
evolved into three modules (each comprising a series of versions): the first module covers fuelcycle
energy and emissions of passenger cars and light-duty trucks (GREET 1.1, GREET 1.2,
etc.); the second covers vehicle-cycle energy and emissions of passenger cars and light-duty
trucks (GREET 2.1, GREET 2.2, etc.); and the third module covers fuel-cycle energy and
emissions of heavy-duty trucks (gross vehicle weight over 8,500 pounds) (GREET 3.1,
GREET 3.2, etc.).
In September 1998, GREET 1.4 was released with a draft report documenting its
development. The model was posted at Argonne’s transportation website at
www.transportation.anl.gov/ttrdc/publications/papers_reports/techassess/ta_papers.html, and the
draft report was sent to reviewers for comment. Since then, significant revisions and expansions
have been made to both the report and the model. The current version of the 1-series model is
GREET 1.5. This report documents the development and use of GREET 1.5. It includes portions
of the 1996 report that have few changes (e.g., the introduction and review of previous fuelcycle
studies) to eliminate the need for readers to refer to the previous report. It also reflects
reviewers’ comments on the August 1998 draft report.
This report is separated into two volumes. Volume 1 presents GREET 1.5 development and
use and discussions of fuel-cycle energy and emission results for passenger cars. Volume 2,
comprising four appendices, presents detailed fuel-cycle results for passenger cars, light-duty
trucks 1, and light-duty trucks 2.

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