function h_Tlow_der import Modelica.Media.Interfaces.Choices; extends Modelica.Icons.Function; input Modelica.Media.IdealGases.Common.DataRecord data "Ideal gas data"; input SI.Temperature T "Temperature"; input Boolean exclEnthForm = excludeEnthalpyOfFormation "If true, enthalpy of formation Hf is not included in specific enthalpy h"; input Modelica.Media.Interfaces.Choices.ReferenceEnthalpy refChoice = referenceChoice "Choice of reference enthalpy"; input SI.SpecificEnthalpy h_off = h_offset "User defined offset for reference enthalpy, if referenceChoice = UserDefined"; input Real dT(unit = "K/s") "Temperature derivative"; output Real h_der(unit = "J/(kg.s)") "Derivative of specific enthalpy at temperature T"; end h_Tlow_der;