## FCSys.Characteristics.BaseClasses

Base classes (generally not for direct use)

### Information

Extends from Modelica.Icons.BasesPackage (Icon for packages containing base classes).

### Package Content

Name | Description
--- | ---
CharacteristicNASA | Thermodynamic package with diffusive properties based on NASA CEA
Characteristic | Package of thermodynamic and diffusive properties
CharacteristicEOS | Base thermodynamic package with only the p-v-T relations
ReferenceEnthalpy | Enumeration for the reference enthalpy of a species
Phase | Enumeration for material phases

### Types and constants

    type ReferenceEnthalpy = enumeration(
        zeroAt0K "Enthalpy at 0 K and p0 is 0 (if no additional offset)",
        zeroAt25degC "Enthalpy at 25 degC and p0 is 0 (if no additional offset)",
        enthalpyOfFormationAt25degC
          "Enthalpy at 25 degC and p0 is enthalpy of formation at 25 degC and p0 (if no additional offset)")
      "Enumeration for the reference enthalpy of a species";

    type Phase = enumeration(
        gas "Gas",
        solid "Solid",
        liquid "Liquid") "Enumeration for material phases";