Description
indexRatio = currentIndex/baseIndex; adjustedTariff = baseTariff*(1-fuelShare+fuelShare*indexRatio).
Energy price comparisons require consistent delivered or input energy units, efficiency, calorific basis and reporting period. Dividing by efficiency increases the input needed for a delivered unit; nominal price differences alone need not represent a saving.
indexRatio = currentIndex/baseIndex; adjustedTariff = baseTariff*(1-fuelShare+fuelShare*indexRatio).
When to use this tool
Use Fuel Indexed Tariff One Factor Term when checking one supplied energy-price normalization or cost contribution.
How to use the tool and how it works
- Enter baseTariff, fuelShare, currentIndex, baseIndex. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read indexRatio, adjustedTariff. Use the output convention below.
Require fuelShare in [0,1], positive baseIndex and nonnegative currentIndex. indexRatio = currentIndex/baseIndex; adjustedTariff = baseTariff*(1-fuelShare+fuelShare*indexRatio).1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| baseTariff | Base Tariff | Required. Finite number. |
| fuelShare | Fuel Share | Required. Finite number; minimum 0; maximum 1. |
| currentIndex | Current Index | Required. Finite number; minimum 0. |
| baseIndex | Base Index | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| indexRatio | Index Ratio | Required. Finite number. |
| adjustedTariff | Adjusted Tariff | Required. Finite number. |
{
"input": {
"baseTariff": 100,
"fuelShare": 0.4,
"currentIndex": 150,
"baseIndex": 100
},
"output": {
"indexRatio": 1.5,
"adjustedTariff": 120
}
}Limitations and assumptions
- The indexed fraction and base tariff are supplied. No index data, contractual lag, caps or actual tariff adjustment eligibility is determined.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use the full tariff, operating profile and cost boundary when assessing real bills, investments or load-shifting decisions.
References
Similar or alternative tools
- Fuel Heat Price Reference Gap
deliveredPricePerHeat = pricePerFuelUnit/(heatPerFuelUnit*deliveredEfficiency); referenceGap subtracts suppliedReferencePricePerHeat.
- Heat Tariff Distribution Loss Share
producedHeat = deliveredHeat/(1-lossFraction); losses = producedHeat*lossFraction; cost = producedHeat*productionPrice.