.ThermoPower.Gas.GTunit

Information

This model adds the performance characteristics to the GTunit_base model, by means of 2D interpolation tables.

Unit performance is a function of two referred quantities, i.e. Zero Loss Power Output referred at ISO conditions (ZLPout_ISO) and referred speed. In typical performance charts, curves corresponding to different referred speeds are labelled by synchronous temperatures (Tsync), i.e. inlet temperatures which would give the same referred speed if the unit operated at nominal rotational speed. The performance is thus specified by three functions[1]:

which in turn are specified by three tables, in the format of Modelica.Blocks.Tables.CombiTable2D:

  1. tableHI, where ZLPout_ISO is the first column and Tsync the first row
  2. tablePR, where ZLPout_ISO is the first column and Tsync the first row
  3. tableW, where ZLPout_ISO is the first column and Tsync the first row, respectively.

Modelling options

The packages Medium are redeclared and a mass balance determines the composition of the outgoing gas.

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

References:

  1. P. P. Walsh, P. Fletcher: Gas Turbine Performance, 2nd ed., Oxford, Blackwell, 2004, pp. 646.

Revisions


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