/// <summary>
/// Retrieve the temperature dependent function for a given property id
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
public PropertyFunction GetFunction(EvaluatedProperties id)
{
var function = Functions.FirstOrDefault(c => c.Property == id);
if (function != null)
{
return(function);
}
else
{
throw new ArgumentException("Property function ID not found");
}
}
public string GetVariableNameForProperty(EvaluatedProperties id)
{
switch (id)
{
case EvaluatedProperties.HeatOfVaporization:
return("HVAP");
case EvaluatedProperties.IdealGasHeatCapacity:
return("CPID");
case EvaluatedProperties.LiquidDensity:
return("DENL");
case EvaluatedProperties.LiquidHeatCapacity:
return("CL");
case EvaluatedProperties.LiquidHeatConductivity:
return("KLIQ");
case EvaluatedProperties.SurfaceTension:
return("ST");
case EvaluatedProperties.VaporHeatConductivity:
return("KVAP");
case EvaluatedProperties.VaporViscosity:
return("VISV");
case EvaluatedProperties.LiquidViscosity:
return("VISL");
case EvaluatedProperties.VaporPressure:
return("VP");
default:
throw new InvalidOperationException("Unknown property type");
}
}
PropertyFunction GetFunction(XElement xElement, EvaluatedProperties prop)
{
if (xElement == null)
{
throw new ArgumentException("xElement was null");
}
var uom = ParseUOM((string)xElement.Attribute("units"));
var tfunc = new PropertyFunction()
{
Type = GetFunctionType((int)xElement.Element("eqno").Attribute("value")),
Property = prop,
MinimumX = GetVariable(xElement.Element("Tmin"), "Tmin"),
MaximumX = GetVariable(xElement.Element("Tmax"), "Tmax"),
XUnit = GetVariable(xElement.Element("Tmax"), "Tmax").InternalUnit,
YUnit = uom
};
var a = xElement.Element("A");
if (a != null)
{
tfunc.Coefficients.Add(new Variable("A", (double)a.Attribute("value"))
{
IsConstant = true, IsFixed = true
});
}
var b = xElement.Element("B");
if (b != null)
{
tfunc.Coefficients.Add(new Variable("B", (double)b.Attribute("value"))
{
IsConstant = true, IsFixed = true
});
}
var c = xElement.Element("C");
if (c != null)
{
tfunc.Coefficients.Add(new Variable("C", (double)c.Attribute("value"))
{
IsConstant = true, IsFixed = true
});
}
var d = xElement.Element("D");
if (d != null)
{
tfunc.Coefficients.Add(new Variable("D", (double)d.Attribute("value"))
{
IsConstant = true, IsFixed = true
});
}
var e = xElement.Element("E");
if (e != null)
{
tfunc.Coefficients.Add(new Variable("E", (double)e.Attribute("value"))
{
IsConstant = true, IsFixed = true
});
}
return(tfunc);
}
