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Energy Retrofit Savings Realization Factor Tool

Divide supplied signed actual energy savings by nonzero modeled savings without estimating a retrofit counterfactual.

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Description

Calculate supplied actual-to-modeled energy-saving ratio.

Energy prices and charges depend on energy units, demand units, standing-charge days, tariff periods and settlement sign conventions. Purchased-energy losses differ from delivered-energy fractions, and signed prices can produce negative monetary terms. Nominal battery cost allocations are supplied scenarios rather than physical aging forecasts.

Calculate supplied actual-to-modeled energy-saving ratio.

When to use this tool

Use Energy Retrofit Savings Realization Factor when you already have actualSavedEnergy, modeledSavedEnergy and need to calculate supplied actual-to-modeled energy-saving ratio.

How to use the tool and how it works

  1. Enter actualSavedEnergy, modeledSavedEnergy. Use the units and conventions below.
  2. Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
  3. Read realizationFactor. Use the output convention below.

Require modeledSavedEnergy!=0; return actualSavedEnergy/modeledSavedEnergy.1

Input fieldMeaning and unitsAccepted input
actualSavedEnergyActual Saved EnergyRequired. Finite number.
modeledSavedEnergyModeled Saved EnergyRequired. Finite number.
Output fieldInterpretationReturned shape
realizationFactorRealization FactorRequired. Finite number.
json
{
  "input": {
    "actualSavedEnergy": 80,
    "modeledSavedEnergy": 100
  },
  "output": {
    "realizationFactor": 0.8
  }
}

Limitations and assumptions

  • Signed values and ratios outside [0,1] are accepted. No causal savings, counterfactual, measurement uncertainty or retrofit benefit is estimated.
  • 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

Reconcile the actual meter series, tariff, contract and billing definitions for an account or market question. Use a complete cash-flow or physical-energy model when needed; a single block overlap, index ratio or supplied settlement term cannot establish actual charges or performance.

References

  1. Calculation and input contract: energy-economics/energy-retrofit-savings-realization-factor — tool.io

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