com.synerset.hvacengine.process.heating.HeatingFromPower Maven / Gradle / Ivy

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HVAC|Engine is a comprehensive library for calculating moist air properties, including crucial thermodynamic processes such as heating, dry cooling, real cooling with condensate discharge, mixing single or multiple air streams, and more. Immutable, thread-safe, very accurate.

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package com.synerset.hvacengine.process.heating;

import com.synerset.hvacengine.fluids.humidair.FlowOfHumidAir;
import com.synerset.hvacengine.fluids.humidair.HumidAir;
import com.synerset.hvacengine.fluids.humidair.HumidAirEquations;
import com.synerset.unitility.unitsystem.flow.MassFlow;
import com.synerset.unitility.unitsystem.thermodynamic.Power;
import com.synerset.unitility.unitsystem.thermodynamic.Temperature;

/**
 * Calculates outlet temperature for heating case based on input heat of process.
 * This method can be used only for heating, inputHeatQ must be passed as positive value
 * REFERENCE SOURCE: [1][2] [t2,oC] (42)(2.2) [6.12][37]
 *
 * @param inletAir  initial {@link FlowOfHumidAir}
 * @param inputPower heating {@link Power}
 */
record HeatingFromPower(FlowOfHumidAir inletAir,
                        Power inputPower) implements HeatingStrategy {

    @Override
    public AirHeatingResult applyHeating() {

        if (inputPower.isEqualZero() || inletAir.getMassFlow().isEqualZero()) {
            return new AirHeatingResult(inletAir, inputPower);
        }

        HumidAir inletHumidAir = inletAir.getFluid();
        double qHeat = inputPower.getInKiloWatts();
        double xIn = inletHumidAir.getHumidityRatio().getInKilogramPerKilogram();
        double mdaIn = inletAir.getDryAirMassFlow().getInKilogramsPerSecond();
        double pIn = inletHumidAir.getPressure().getInPascals();
        double iIn = inletHumidAir.getSpecificEnthalpy().getInKiloJoulesPerKiloGram();
        double iOut = (mdaIn * iIn + qHeat) / mdaIn;
        double tOut = HumidAirEquations.dryBulbTemperatureIX(iOut, xIn, pIn);

        HumidAir outletHumidAir = HumidAir.of(inletAir.getPressure(), Temperature.ofCelsius(tOut), inletAir.getHumidityRatio());
        FlowOfHumidAir outletFlow = FlowOfHumidAir.ofDryAirMassFlow(outletHumidAir, MassFlow.ofKilogramsPerSecond(mdaIn));

        return new AirHeatingResult(outletFlow, inputPower);
    }

}