BasePropertiesBase properties of T dependent medium 
This information is part of the Modelica Standard Library maintained by the Modelica Association.
Note that the inner energy neglects the pressure dependence, which is only true for an incompressible medium with d = constant. The neglected term is preference_p)/rho*(T/rho)*(partial rho /partial T). This is very small for liquids due to proportionality to 1/d^2, but can be problematic for gases that are modeled incompressible.
It should be noted that incompressible media only have 1 state per control volume (usually T), but have both T and p as inputs for fully correct properties. The error of using only Tdependent properties is small, therefore a Boolean flag enthalpyOfT exists. If it is true, the enumeration Choices.independentVariables is set to Choices.independentVariables.T otherwise it is set to Choices.independentVariables.pT.
Enthalpy is never a function of T only (h = h(T) + (preference_p)/d), but the error is also small and nonlinear systems can be avoided. In particular, nonlinear systems are small and local as opposed to large and over all volumes.
Entropy is calculated as
s = s0 + integral(Cp(T)/T,dt)
which is only exactly true for a fluid with constant density d=d0.
preferredMediumStates 
Value: false Type: Boolean Description: = true if StateSelect.prefer shall be used for the independent property variables of the medium 

standardOrderComponents 
Value: true Type: Boolean Description: If true, and reducedX = true, the last element of X will be computed from the other ones 
T_start 
Value: 298.15 Type: Temperature (K) Description: Initial temperature 
p 
Type: InputAbsolutePressure Description: Absolute pressure of medium 


Xi 
Type: InputMassFraction[nXi] Description: Structurally independent mass fractions 

h 
Type: InputSpecificEnthalpy Description: Specific enthalpy of medium 
state 
Type: ThermodynamicState Description: Thermodynamic state record for optional functions 

Modelica.Media.Incompressible.Examples Test Glycol47 Medium model 