The Greenhouse gases, Regulated Emissions, and Energy use in Technologies Model (GREET)

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Abstract: The Greenhouse gases, Regulated Emissions, and Energy use in Technologies (GREET) model is a publicly available life-cycle analysis tool for consistently examining life-cycle energy and environmental effects of a wide range of technologies in transportation, power, and material products. It takes a holistic approach to model energy and environmental effects over the entire supply chain of a technology with process-level granularity. GREET currently has two models: the Fuel-Cycle Model focusing on transportation fuels and vehicle operation, and the Vehicle-Cycle Model focusing on vehicle materials, manufacturing, and recycling. GREET is available in two platforms: the Excel and the .net GREET model.
It currently has over 40,000 registered users, and has been widely used by government agencies, industry, and academia for technology evaluation and policy-making. GREET is an integral part of the transportation and bioenergy technology evaluation. High-quality, consistent, and peer-reviewed analyses and publications using GREET play a valuable role in identifying opportunities to improve sustainability of technologies, promoting clean and efficient vehicle and fuel technologies, and informing policies.
Model/Tool Platform:
MS Excel, .Net
General Modeling Type:
Hybrid / other: Geospatial Accounting and Inventory (w/ Statistical Capability)
Primary analytical purpose:
Life-cycle analysis: Analysis of the environmental, social, or economics effects of bioenergy and bioproduct technologies across their entire life-cycle.
Secondary analytical purpose:
Environmental: Analysis of the environmental effects of bioenergy and bioproduct technologies or feedstocks.
Metric categories:
  • Environmental:
    • Air Quality (non-GHG emissions)
    • Environmental Productivity (feedstock-related, e.g., NPP or yield)
    • GHG Emissions
    • Soil Quality
    • Water Impacts (quality and/or quantity)
  • Socio-economic:
    • Net Energy Balance
Geospatial resolution:
National
Temporal resolution:
Years
Laboratory:
ANL - Argonne National Laboratory
Principal investigator:
Michael Wang
Model start year:
1995
Model last updated:
2020
Development status:
In Development
Level of validation/review:
External Peer Review / Publicly Released
Links:
Model scope:
Supply chain elements
Biomass Supply
Feedstock Logistics
Conversion
Distribution
End Use
  • Feedstock Types
    • Starch
    • Sugar Crops
    • Oil Crops
    • Fiber Crops
    • Cover Crops and Hay
    • Agricultural Residues
    • Herbaceous Energy Crops
    • Forest Residues
    • Forest Resources
    • Woody Energy Crops
    • Solid Wastes (e.g., MSW, C&D, yard trimmings)
    • Algae
    • Wet Wastes (e.g., wastewater sludge, animal manure, food waste)
    • Fats, Oils, and Greases
    • Landfill Gas
  • Conversion Technology
    • Starch to Sugars
    • Lignocellulosic Biomass to Sugars
    • Lignocellulosic Biomass to Gaseous Intermediate
    • Lignocellulosic Biomass to Biocrude Intermediate (TC)
    • Waste to Biocrude Intermediates (HTL)
    • Waste to Gaseous Intermediate
    • Biomass-Based Oil Extraction
    • Syngas Catalytic Upgrading
    • Sugar Catalytic Upgrading
    • Oil Catalytic Upgrading
    • Sugar Biological Upgrading
    • Syngas Biological Upgrading
    • Alcohol Catalytic (e.g., ethanol or isobutanol to jet)
    • Algae to Biocrude Intermediate (HTL)
  • Products/Process Outputs
    • Transportation Fuels - Biodiesel
    • Transportation Fuels - Ethanol
    • Transportation Fuels - Renewable Diesel
    • Transportation Fuels - Renewable Gasoline
    • Transportation Fuels - Renewable Jet
    • Renewable Natural Gas
    • Biopower
    • Intermediate - Sugars
    • Intermediate - Clean Biomass-based Crop Oils
    • Intermediate - Clean Biomass-based Algal Oils
    • Intermediate - Pyrolysis or Biocrude Intermediate
    • Intermediate - Syngas
    • Bioproducts
    • Other Process Output
  • Transportation Market Segment
    • Light Duty Vehicles
    • Heavy Duty Vehicles
    • Trains
    • Aviation
    • Marine
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Analytical Purpose
Supply Chain Elements
Biomass Supply
Feedstock Logistics
Conversion
Distribution
End Use

Resource Assessment Models

Forest Sustainable and Economic Analysis Model (ForSEAM)
Supply chain elements: Biomass Supply
Policy Analysis System Model (POLYSYS)
Supply chain elements: Biomass Supply, Feedstock Logistics, Conversion

Feasibility / Implementation Models

Techno-economic analysis
Algae Farm Model
Supply chain elements: Biomass Supply, Feedstock Logistics
NREL Conversion TEA Models (NREL-TEA)
Supply chain elements: Conversion
PNNL Conversion TEA Models (PNNL-TEA)
Supply chain elements: Conversion
Biomass Logistics Model (BLM)
Supply chain elements: Biomass Supply, Feedstock Logistics, Conversion
Supply Characterization Model (SCM)
Supply chain elements: Biomass Supply, Feedstock Logistics, Conversion, Distribution

Impact Assessment Models

Available Water Remaining for the United States (AWARE-US)
Supply chain elements: Biomass Supply, Feedstock Logistics, Conversion, Distribution, End Use
Bio-based circular carbon economy Environmentally-extended Input-Output Model (BEIOM)
Supply chain elements: Biomass Supply, Feedstock Logistics, Conversion, Distribution, End Use
Carbon Calculator for Land Use and Land Management Change from Biofuels Production (CCLUB)
Supply chain elements: Biomass Supply
Water Analysis Tool for Energy Resources (WATER)
Supply chain elements: Biomass Supply, Feedstock Logistics, Conversion

Integrated Scenario Assessment Models

Air emissions, Greenhouse gas emissions, and Energy use model for the Bioeconomy (Bioeconomy AGE)
Supply chain elements: Biomass Supply, Feedstock Logistics, Conversion, Distribution, End Use
Bioenergy Scenario Model (BSM)
Supply chain elements: Biomass Supply, Feedstock Logistics, Conversion, Distribution, End Use
Information last updated: Sep. 17, 2019 13:45:46 EDT