GREET Excel Model Platform

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DOI: 10.11578/GREET-Excel-2021/dc.20210902.1

GREET 2021 is released !
October 11, 2021

The GREET team of Systems Assessment Center at Argonne National Laboratory is pleased to announce a new release of the GREET model.

What is New:

    GREET 1
  • Updated corn farming and corn ethanol production pathways using the data from USDA and industry biorefinery benchmarking data
  • Updated ethanol yield, co-produced electricity, and material inputs of cellulosic ethanol production pathways with feedstocks including corn stover, switchgrass, miscanthus, forest residue, willow, poplar, forage sorghum, and the biogenic portion of municipal solid waste
  • Updated farming inputs and on-farm energy consumption for production of corn and soybeans based on data from most recent USDA farm survey and reported them in farming inputs per acre and yields of corn and soybeans (separately) per acre
  • Expanded the Feedstock Carbon Intensity Calculator (FD-CIC) by adding soybeans, sorghum, and rice besides corn
  • Updated fuel economy and emissions factors for criteria air pollutants for light-, medium-, and heavy-duty vehicles per latest Argonne Autonomie simulations and EPA MOVES modeling
  • Added eight fuel production pathways for use in engines co-optimized with drop-in biofuel blends for improving engine efficiency and reducing engine-out emissions
  • Added an engine efficiency gain calculation module for the drop-in biofuel blends for gasoline engines
  • Added new production pathways for nine fossil-based chemicals that are relevant to downstream processes for plastics production or recycling
  • Renamed the Chemicals tab as a “Steam_Cracking” tab as the analysis framework in this tab is for production of olefins, aromatics, and hydrogen from natural gas liquids (NGL) and petroleum naphtha steam cracking plants
  • Renamed the former Bioproducts tab as a “Chemicals” tab as it contains pathways for both fossil and bio-derived chemicals
  • Added five new fossil-based resin production pathways in the new Plastics tab
  • Added three new production pathways for a bio-based resin, or polyethylene furanoate (PEF)
  • Added two new catalysts for biofuel production (Pd/NbOPO4 and ZrO2) to the Catalyst tab, as well as four additional materials associated with the catalysts’ production (Nb2O5, KNbO3, NbOPO4, and zircon)
  • Added direct air capture (DAC) as a CO2 source option in the E-fuel tab
  • Updated default methane leakage rates of the natural gas supply chain that is now based on a hybrid approach with top-down and bottom-up methane leakage data from two recent studies; changed the original default bottom-up leakage rates in previous GREET from EPA greenhouse gas emission inventory as an alternative case
  • Added five new novel marine fuel pathways to the Marine Fuels module
  • Added a new module on forest residue to bio-electricity. It supports regional LCA of bio-electricity for 12 states
  • Added a new module on co-processing of bio-feedstocks in petroleum refineries with placeholder parameters which will be updated in a new version of GREET
  • Restructured the RNG tab to present the impact of current waste management and waste-to-energy pathways separately
  • Added eight sustainable aviation fuel (SAF) production pathways using the data in the CORSIA supporting document released by ICAO
  • Updated the Rail Module for energy use intensities and emission factors by rail type for 2020-2050 for diesel, electric, and alternative fuel locomotives
  • Updated U.S. railroad operational characteristics including rail ton-miles, total tonnage. Total mileage, average Tons/car, and total diesel use for different commodity types
  • Expanded hydrogen pathways to include both gaseous and liquid hydrogen as a fuel supply source for fuel cell locomotives

  • GREET 2
  • Added the vehicle-cycle analysis of three medium- and heavy-duty vehicles (MHDVs) (Class 8 long-haul trucks; Class 8 short-haul combination trucks; and Class 6 pickup-and-delivery truck) with four powertrains (ICEV, HEV, EV, and FCV)
  • Updated carbon fiber life-cycle inventory for process energy and emission details of each step of carbon fiber LCA
  • Added electrolytic manganese metal within manganese production pathway
  • Provided detailed production pathway data for lithium (lithium carbonate and lithium hydroxide) from Chilean brine and Australian spodumene
  • Added time-series data for weight and power/energy parameters for car, SUV and pickup truck to expand the cradle-to-grave analysis over time
  • Updated the production of platinum-group metals (PGMs) that includes platinum, palladium, ruthenium, and gold

  • A New GREET Building LCA Module
  • Designed a new GREET Building LCA Module to conduct LCA of building materials, components, and whole buildings
  • Added features for users to use their bill of materials for building components and whole buildings
  • Designed Graphical User Interfaces for step-to-step data entry, modeling, and visualization of LCA results
  • Connected the material-level modeling and whole building modeling to enable holistic LCA of alternative material choices and building designs
  • Integrated the Building LCA Module with GREET 1 and GREET 2 to benefit from updated data for common process fuels, electricity, materials, and transportation modalities in the GREET models for LCA of building materials and whole buildings

For more information on these updates, please use the following link: (948KB pdf)

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