GREET: Vehicle Energy & Emissions Modeling
One can imagine GREET supporting OR vehicle applications such as designing a fleet of vehicles with desired energy usage and emission profiles (including minimal, or at least capped by some limit). And this could work much like the way renewable portfolio standards (RPS) are being tested in large-scale electric power models with the goal of capping emissions while minimizing cost impact. Like the RPS, vehicles with advanced low-energy and low-emissions fuels and technologies would help reduce negative environmental impacts, while likely incurring greater cost in the short-term. Various vehicle and fuel mixes aimed at meeting energy/environment goals subject to cost, policy and other constraints could be analyzed.
GREET has been used widely. See this list of publications for numerous examples. It is available free of charge from Argonne’s web site here. For more information see the site as well as this press release.
Update: Paper comparing GREET to the BESS tool in the context of corn ethanol – Richard J. Plevin, Modeling Corn Ethanol and Climate: A Critical Comparison of the BESS and GREET Models, Journal of Industrial Ecology, Volume 13 Issue 4, Pages 495 – 507, Published Online: 25 Jun 2009