Life Cycle Analysis of Transportation Fuels and Vehicle Technologies with the GREET Model: Key Issues and Results
Pursuit of sustainable transportation systems requires evaluation of them in a holistic way with life-cycle analysis (LCA). In fact, LCA now becomes an integral part of evaluation of advanced vehicle technologies and new transportation fuels. Since 1995, Argonne has been developing the Greenhouse gases, Regulated Emissions, and Energy use in Transportation (GREET) model for LCA of transportation fuels and vehicle technologies. The most recent GREET version GREET1.2013 was released in October 2013.
At present, GREET has more than 22,000 registered users worldwide. LCA results of vehicle/fuel systems are determined by several critical factors – technology advancements, treatment of co-products in LCAs, system boundary definition, and data availability and reliability, among other factors. In its own LCAs with the GREET model, Argonne has been closely examining these issues. This presentation will discuss these issues and their effects on LCA results. It will present up-to-date results of biofuel production pathways, electric drive technologies, and natural gas use in transportation with the most recent GREET version.