com.synerset.hvacengine.process.heating.HeatingStrategy 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.common.Validators;
import com.synerset.hvacengine.common.exceptions.HvacEngineArgumentException;
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.humidity.RelativeHumidity;
import com.synerset.unitility.unitsystem.thermodynamic.Power;
import com.synerset.unitility.unitsystem.thermodynamic.SpecificEnthalpy;
import com.synerset.unitility.unitsystem.thermodynamic.Temperature;

/**
 * The HeatingStrategy interface defines methods for applying heating processes to a flow of humid air.
 * Implementations of this interface represent different strategies for heating the incoming air using either
 * input power, a target relative humidity, or a target temperature.
 */
public interface HeatingStrategy {

    /**
     * Apply the heating process and calculate the resulting air properties.
     *
     * @return An AirHeatingResult object containing the properties of the heated air.
     */
    AirHeatingResult applyHeating();

    /**
     * Get the inlet air flow properties.
     *
     * @return The FlowOfHumidAir representing the properties of the incoming air.
     */
    FlowOfHumidAir inletAir();

    /**
     * Create a HeatingStrategy instance based on the specified input parameters representing heating power.
     *
     * @param inletAirFlow The incoming air flow properties.
     * @param inputPower   The heating power (positive value).
     * @return A HeatingStrategy instance for heating based on input power.
     * @throws HvacEngineArgumentException If the input parameters are invalid.
     */
    static HeatingStrategy of(FlowOfHumidAir inletAirFlow, Power inputPower) {
        Validators.requireNotNull(inletAirFlow);
        Validators.requireNotNull(inputPower);

        if (inputPower.isNegative()) {
            throw new HvacEngineArgumentException("Heating power must be positive value. Q_in = " + inputPower);
        }

        // Mox heating power estimate to reach t_max: Qheat.max= G * (imax - i_in)
        Temperature tMax = HumidAirEquations.dryBulbTemperatureMax(inletAirFlow.getPressure()).multiply(0.98);
        SpecificEnthalpy iMax = HumidAirEquations.specificEnthalpy(tMax, inletAirFlow.getHumidityRatio(),
                inletAirFlow.getPressure());
        double qMax = iMax.minus(inletAirFlow.getSpecificEnthalpy())
                .multiply(inletAirFlow.getMassFlow().toKilogramsPerSecond());
        Power estimatedPowerLimit = Power.ofKiloWatts(qMax);
        if (inputPower.isGreaterThan(estimatedPowerLimit)) {
            throw new HvacEngineArgumentException("To large heating power for provided flow. "
                    + "Q_in = " + inputPower + " Q_limit = " + estimatedPowerLimit);
        }
        return new HeatingFromPower(inletAirFlow, inputPower);
    }

    /**
     * Create a HeatingStrategy instance based on the specified input parameters representing target relative humidity.
     *
     * @param inletAirFlow           The incoming air flow properties.
     * @param targetRelativeHumidity The desired target relative humidity.
     * @return A HeatingStrategy instance for heating based on a target relative humidity.
     * @throws HvacEngineArgumentException If the input parameters are invalid.
     */
    static HeatingStrategy of(FlowOfHumidAir inletAirFlow, RelativeHumidity targetRelativeHumidity) {
        Validators.requireNotNull(inletAirFlow);
        Validators.requireNotNull(targetRelativeHumidity);
        Validators.requireBetweenBoundsInclusive(targetRelativeHumidity, RelativeHumidity.RH_MIN_LIMIT, RelativeHumidity.ofPercentage(98));
        if (targetRelativeHumidity.isGreaterThan(inletAirFlow.getRelativeHumidity())) {
            throw new HvacEngineArgumentException("Heating process cannot increase relative humidity. "
                    + "RH_in = " + inletAirFlow.getRelativeHumidity() + " RH_target = " + targetRelativeHumidity);
        }
        return new HeatingFromRH(inletAirFlow, targetRelativeHumidity);
    }

    /**
     * Create a HeatingStrategy instance based on the specified input parameters representing target temperature.
     *
     * @param inletAirFlow      The incoming air flow properties.
     * @param targetTemperature The desired target temperature.
     * @return A HeatingStrategy instance for heating based on a target temperature.
     * @throws HvacEngineArgumentException If the input parameters are invalid.
     */
    static HeatingStrategy of(FlowOfHumidAir inletAirFlow, Temperature targetTemperature) {
        Validators.requireNotNull(inletAirFlow);
        Validators.requireNotNull(targetTemperature);
        Validators.requireBelowUpperBoundInclusive(targetTemperature, HumidAir.TEMPERATURE_MAX_LIMIT);
        if (targetTemperature.isLowerThan(inletAirFlow.getTemperature())) {
            throw new HvacEngineArgumentException("Expected outlet temperature must be greater than inlet for cooling process. "
                    + "DBT_in = " + inletAirFlow.getRelativeHumidity() + " DBT_target = " + inletAirFlow.getTemperature());
        }
        return new HeatingFromTemperature(inletAirFlow, targetTemperature);
    }

}