public double GetRelativeHumidityFromDryBulbAndDewPoint(double dryBulbTemperature, double dewPoint)
{
double pSaturation = moistureProperties.GetSaturationPressure(dryBulbTemperature);
double pPartial = moistureProperties.GetSaturationPressure(dewPoint);
return(pPartial / pSaturation);
}
//this is a generic constructor for all possible drying gases
/*public HumidGasCalculator(double moistureMolarMass, double gasMolarMass, double specificHeatOfMoisture, double specificHeatOfDryGas) {
* this.moistureMolarMass = moistureMolarMass;
* this.gasMolarMass = gasMolarMass;
* this.specificHeatOfMoisture = moistureProperties.GetSpecificHeatOfVapor();
* this.specificHeatOfDryGas = gasProperties.GetSpecificHeatOfDryGas();
* moistureGasMolarMassRatio = moistureMolarMass/gasMolarMass;
* }*/
public double GetHumidityFromDryBulbWetBulbAndPressure(double dryBulbTemperature, double wetBulbTemperature, double totalPressure)
{
double pSaturation = moistureProperties.GetSaturationPressure(wetBulbTemperature);
double saturationHumidity = moistureGasMolarMassRatio * pSaturation / (totalPressure - pSaturation);
double evapHeat = moistureProperties.GetEvaporationHeat(wetBulbTemperature);
double cpGas = gasProperties.GetSpecificHeatOfDryGas((dryBulbTemperature + wetBulbTemperature) / 2.0);
double cpMoisture = moistureProperties.GetSpecificHeatOfVapor((dryBulbTemperature + wetBulbTemperature) / 2.0);
double humidity = (evapHeat * saturationHumidity - cpGas * (dryBulbTemperature - wetBulbTemperature)) /
(evapHeat + cpMoisture * (dryBulbTemperature - wetBulbTemperature));
return(humidity);
}