AirHeatingUsingExhaust.h

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#pragma once
 
#include "losses/gas_flue_gas_material.h"
#include "losses/solid_liquid_flue_gas_material.h"
 
class AirHeatingUsingExhaust {
  public:
    struct Output {
        Output(double hxColdAir, double hxOutletExhaust, double energySavings, double heatCapacityFlue,
               double heatCapacityAir)
            : hxColdAir(hxColdAir), hxOutletExhaust(hxOutletExhaust), energySavings(energySavings),
              heatCapacityFlue(heatCapacityFlue), heatCapacityAir(heatCapacityAir) {}
 
        Output()         = default;
        double hxColdAir = 0, hxOutletExhaust = 0, energySavings = 0, heatCapacityFlue = 0, heatCapacityAir = 0;
    };
 
    AirHeatingUsingExhaust(GasCompositions gasCompositions) {
        fuelHeatingValue = gasCompositions.getHeatingValueVolume();
        stoichAir        = gasCompositions.getStoichometricAir();
    }
 
    AirHeatingUsingExhaust(SolidLiquidFlueGasMaterial solidLiquidFlueGasMaterial, bool solids = true) {
        solids           = solids; // keep or fix unused variable
        fuelHeatingValue = solidLiquidFlueGasMaterial.getHeatingValueFuel();
        stoichAir        = solidLiquidFlueGasMaterial.getStoichAirFuel();
    }
 
    AirHeatingUsingExhaust::Output calculate(const double flueTemperature, const double excessAir,
                                             const double fireRate, const double airflow, const double inletTemperature,
                                             const double heaterEfficiency, const double hxEfficiency,
                                             const double operatingHours);
 
  private:
    double fuelHeatingValue = 1;
    double stoichAir        = 0;
};