This method is based on the Stodola's law, which calculates
`PR` as function of the inlet conditions, i.e. mass
flowrate, inlet temperature and pressure.

**Modelling options**

The following options are available to define Stodola's constant
`K`:

`NominalCondition = true`: Stodola's constant K is specified by the nominal operating point (`wnom,Tstart_in,pstart_in,pstart_out`)`NominalCondition = false`: Stodola's constant K is used directly.

The following options are available to define the efficiency
`eta`:

`fixedEta = true`: the efficiency is explicitly supplied as a parameter.`fixedEta = false`: the efficiency is a function of the pressure ratio`PR`and of the referred speed`N_T`. The function is defined by interpolation of the table`tableEta`, where`N_T`represents the first row and`PR`the first column of the table. The interpolation is performed by a`Modelica.Blocks.Tables.CombiTable2D`model.

The following options are available to select the way of definition of the table:

`Table = 0`: the table is explicitly supplied as a matrix parameter.`Table = 1`: the table is read from a file; the string`fileName`contains the path to the files where the table is stored, either in ASCII or Matlab binary format.

*13 Apr 2005*by Francesco Casella:

Turbine model restructured using inheritance.

First release.

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