//cp unit is J/kg.k
private static double CalculateCp(ArrayList materialComponents, double temperature, SubstanceState state)
{
double heatCapacity = 0.0;
double cp = 0;
double molarWeight;
double massFrac;
foreach (MaterialComponent mc in materialComponents)
{
Substance s = mc.Substance;
molarWeight = s.MolarWeight;
ThermalPropsAndCoeffs tpc = s.ThermalPropsAndCoeffs;
massFrac = mc.GetMassFractionValue();
if (state == SubstanceState.Gas)
{
cp = ThermalPropCalculator.CalculateGasHeatCapacity1(temperature, tpc.GasCpCoeffs) / molarWeight;
}
else if (state == SubstanceState.Liquid)
{
cp = ThermalPropCalculator.CalculateLiquidHeatCapacity1(temperature, tpc.LiqCpCoeffs) / molarWeight;
}
heatCapacity += cp * massFrac;
}
return(heatCapacity);
}
public double GetSpecificHeatOfVapor(double temperature)
{
//return 1880.0;
double cp = ThermalPropCalculator.CalculateGasHeatCapacity1(temperature, gasCpCoeffs);
return(cp / molarWeight);
}
public double GetMeanSpecificHeatOfDryGas(double t1, double t2)
{
double cp;
if (Math.Abs(t1 - t2) > 1.0e-4)
{
cp = ThermalPropCalculator.CalculateMeanGasHeatCapacity1(t1, t2, gasCpCoeffs);
}
else
{
cp = ThermalPropCalculator.CalculateGasHeatCapacity1(t1, gasCpCoeffs);
}
return(cp / molarWeight);
}
public static double GetSpecificHeatRatio(ArrayList materialComponents, double temperature)
{
double heatCapacity = 0.0;
double cp = 0;
//double molarWeight = 0.0;
double w;
double molarFrac;
double totalMole = 0.0;
foreach (MaterialComponent mc in materialComponents)
{
Substance s = mc.Substance;
if (s.Name == "Generic Dry Material" || s is CompositeSubstance)
{
continue;
}
w = s.MolarWeight;
molarFrac = mc.GetMassFractionValue() / w;
totalMole += molarFrac;
}
foreach (MaterialComponent mc in materialComponents)
{
Substance s = mc.Substance;
if (s.Name == "Generic Dry Material" || s is CompositeSubstance)
{
continue;
}
w = s.MolarWeight;
ThermalPropsAndCoeffs tpc = s.ThermalPropsAndCoeffs;
molarFrac = mc.GetMassFractionValue() / w / totalMole;
//since heat capacity from ThermalPropCalculator is in J/kmol.K, it is necessary to
//convert into kJ/kmol.K to be aligned with the unit of universal gas constant R
heatCapacity = ThermalPropCalculator.CalculateGasHeatCapacity1(temperature, tpc.GasCpCoeffs) / 1000;
cp += heatCapacity * molarFrac;
}
return(cp / (cp - Constants.R));
}
public static double GetSpecificHeatRatio(ArrayList materialComponents, double temperature)
{
double heatCapacity = 0.0;
double cp = 0;
//double molarWeight = 0.0;
double w;
double molarFrac;
double totalMole = 1.0;
foreach (MaterialComponent mc in materialComponents)
{
Substance s = mc.Substance;
if (s.Name == "Generic Dry Material" || s is CompositeSubstance)
{
continue;
}
w = s.MolarWeight;
molarFrac = mc.GetMassFractionValue() / w;
totalMole += molarFrac;
}
foreach (MaterialComponent mc in materialComponents)
{
Substance s = mc.Substance;
if (s.Name == "Generic Dry Material" || s is CompositeSubstance)
{
continue;
}
w = s.MolarWeight;
ThermalPropsAndCoeffs tpc = s.ThermalPropsAndCoeffs;
molarFrac = mc.GetMassFractionValue() / w / totalMole;
heatCapacity = ThermalPropCalculator.CalculateGasHeatCapacity1(temperature, tpc.GasCpCoeffs);
cp += heatCapacity * molarFrac;
}
return(cp / (cp - Constants.R));
}
