Argonne’s Systems Assessment Group has released the 2016 update to its suite of GREET (Greenhouse gases, Regulated Emissions, and Energy use in Transportation Model) models and associated documentation. GREET is a full life-cycle model that allows researchers and analysts to evaluate various vehicle and fuel combinations on a full fuel-cycle/vehicle-cycle basis. This release includes the following updates:
- Updated water consumption factors for the refining processes of petroleum fuels, thermoelectric and hydroelectric power generation, and hydrogen production processes.
- Updated high-octane-fuel (HOF, with research octane number of 100) pathways in GREET with E10, E25, and E40 ethanol blends.
- Developed new pathways for hydrogen production from dark fermentation of lignocellulosic biomass, high temperature steam electrolysis, and reforming of bio-derived liquids.
- Expanded and updated wastewater sludge-derived fuels and waste-to-energy pathways.
- Updated CCLUB to include N2O emissions associated with LUC GHG emissions for ethanol production scenarios.
- Updated DME production from fossil natural gas, natural gas-derived methanol, and renewable feedstocks.
- Updated the fuel economy and material composition of the light duty vehicles.
- Added bio-based ethanol-to-jet pathways from corn and cellulosic biomass, and sugar-to-jet from cellulosic biomass.
- Updated energy intensity and emissions for freight and intercity passenger rail transportation.