steam_reduction.h

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#pragma once
 
#include <vector>
 
#include "steamModeler/SteamProperties.h"
 
namespace steam_reduction {
 
enum class SteamMeasurementMethod {
    kFlowMeter    = 0, 
    kAirMassFlow  = 1, 
    kWaterMassFlow = 2, 
    kOffsheet     = 3  
};
 
enum class UtilityType {
    kSteam      = 0, 
    kNaturalGas = 1, 
    kOther      = 2  
};
 
struct FlowMeterMethodData {
    double flow_rate = 0.0; 
};
 
struct MassFlowNameplateData {
    double flow_rate = 0.0; 
};
 
struct MassFlowMeasuredData {
    double area_of_duct  = 0.0; 
    double air_velocity  = 0.0; 
};
 
struct MassFlowMethodData {
    bool                 is_nameplate              = false; 
    MassFlowMeasuredData mass_flow_measured_data;           
    MassFlowNameplateData mass_flow_nameplate_data;         
    double               inlet_temperature         = 0.0;  
    double               outlet_temperature        = 0.0;  
};
 
struct OffsheetMethodData {
    double consumption = 0.0; 
};
 
struct SteamReductionInput {
    int    hours_per_year      = 0;   
    UtilityType utility_type   = UtilityType::kNaturalGas; 
    double utility_cost        = 0.0; 
    SteamMeasurementMethod measurement_method = SteamMeasurementMethod::kFlowMeter; 
    double system_efficiency   = 1.0; 
    double pressure            = 0.0; 
    FlowMeterMethodData  flow_meter_method_data;       
    MassFlowMethodData   air_mass_flow_method_data;    
    MassFlowMethodData   water_mass_flow_method_data;  
    OffsheetMethodData   offsheet_method_data;         
    int    units               = 1;   
    double boiler_efficiency   = 1.0; 
    SteamProperties::ThermodynamicQuantity steam_variable_option =
        SteamProperties::ThermodynamicQuantity::TEMPERATURE; 
    double steam_variable      = 0.0; 
    double feed_water_temperature = 0.0; 
};
 
struct SteamReductionOutput {
    double steam_use   = 0.0; 
    double energy_use  = 0.0; 
    double energy_cost = 0.0; 
};
 
SteamReductionOutput steamReduction(const std::vector<SteamReductionInput>& input_vec);
 
SteamReductionOutput flowMeterReduction(const FlowMeterMethodData& data, int hours_per_year,
                                        double system_efficiency, int units, double boiler_efficiency,
                                        double change_enthalpy);
 
SteamReductionOutput airMassFlowReduction(const MassFlowMethodData& data, int hours_per_year,
                                          double system_efficiency, int units, double boiler_efficiency,
                                          double change_enthalpy);
 
SteamReductionOutput waterMassFlowReduction(const MassFlowMethodData& data, int hours_per_year,
                                            double system_efficiency, int units, double boiler_efficiency,
                                            double change_enthalpy);
 
SteamReductionOutput offsheetReduction(const OffsheetMethodData& data, double boiler_efficiency,
                                       double change_enthalpy);
 
double calculateChangeEnthalpy(double pressure,
                                SteamProperties::ThermodynamicQuantity steam_variable_option,
                                double steam_variable, double feed_water_temperature);
 
} // namespace steam_reduction