heatingpro-efficiency/index.js

Utility functions for MonitoringPro efficiency calculations with flexible unit support (GJ, kWh, MWh)

const {
  hasPropertiesAndNotDash,
  toFloatWithDot,
  convertHeatToKwh,
} = require("./utils/index.js");

const computeEfficiency = (
  row,
  prevRow,
  monthlyEffectivityConstant,
  fieldUnits = {}
) => {
  // Helper function to convert MWh to GJ if needed
  const convertValue = (value, fieldName) => {
    if (fieldUnits[fieldName] === "mwh") {
      return value * 3.6; // Convert MWh to GJ
    }
    return value;
  };

  let sumOfDiffs = 0;

  for (let i = 1; i <= 8; i++) {
    const voKey = `VO${i}`;

    if (hasPropertiesAndNotDash(row, prevRow, voKey)) {
      const currentVal = toFloatWithDot(row[voKey]);
      const prevVal = toFloatWithDot(prevRow[voKey]);

      // Convert values if they are in MWh
      const convertedCurrentVal = convertValue(currentVal, voKey);
      const convertedPrevVal = convertValue(prevVal, voKey);

      const diff = convertedCurrentVal - convertedPrevVal;

      if (!isNaN(diff)) {
        sumOfDiffs += diff;
      }
    }
  }

  if (hasPropertiesAndNotDash(row, prevRow, "MT TUV")) {
    const currentVal = toFloatWithDot(row["MT TUV"]);
    const prevVal = toFloatWithDot(prevRow["MT TUV"]);

    // Convert values if they are in MWh
    const convertedCurrentVal = convertValue(currentVal, "MT TUV");
    const convertedPrevVal = convertValue(prevVal, "MT TUV");

    const diff = convertedCurrentVal - convertedPrevVal;

    if (!isNaN(diff)) {
      sumOfDiffs += diff;
    }
  }

  const gasDiff = toFloatWithDot(row["Plyn"]) - toFloatWithDot(prevRow["Plyn"]);

  // Convert heat to kWh based on input units (always GJ now since we converted above)
  const voDiffInKwh = convertHeatToKwh(sumOfDiffs, "GJ");
  const gasDiffInKwh = gasDiff * 9.855; // 1 m³ gas = 9.855 kWh (Method 2)

  const efficiency = Number(
    (voDiffInKwh / (gasDiffInKwh * monthlyEffectivityConstant)) * 10
  ).toFixed(4);

  // Return heat units value (always in GJ for display)
  // Make sure we don't return NaN
  const heatUnitsValue = isNaN(sumOfDiffs) ? 0 : sumOfDiffs;

  return {
    ...row,
    ucinnost: efficiency === "NaN" ? "-" : efficiency,
    heatUnits: heatUnitsValue,
  };
};

module.exports = { computeEfficiency };