Technology Fuel Mix Policies

Similar to technology market shares, the decision on which fuel to use as an input to a device is also simulated in the demand segment. For example, a mandate might require gas pumps to use a larger share ethanol, producing impacts on prices and emissions in a forecast even if the vehicle being fueled is unchanged. This decision is also modeled using consumer choice theory, where a fuel type is selected given price and non-price factors given historical data, prices and assumptions. Policies files can be created and added to scenarios alter the projected decisions coming from the model’s calibration.


Unlike technology market share policies, fuel shares are typically adjusted in the model by setting a floor (DmFracMin) and a ceiling (DmFracMax) for ratio of fuel used in a particular technology. Often a policy will set a floor for a fuel type that is being mandated and a ceiling below 1.0 for the older fuel type that is being replaced. Another option is directly adjusting the non-price factor (DmFracMSM0) to allow for a new fuel type to become available for selection. Setting the non-price factor for two fuel types will allow for them to compete for share based on prices.


  • Example:  RNG_Standard_QC.jl
  • Demand Fuel/Tech Fraction Maximum (DmFracMax)
  • Demand Fuel/Tech Fraction Minimum (DmFracMin)
  • Demand Fuel/Tech Fraction Non-Price Factor (DmFracMSM0)