.ThermoPower.Gas.BaseClasses.TurbineBase

Information

This is the base model for a turbine, including the interface and all equations except the actual computation of the performance characteristics. Reverse flow conditions are not supported.

This model does not include any shaft inertia by itself; if that is needed, connect a Modelica.Mechanics.Rotational.Inertia model to one of the shaft connectors.

As a base-model, it can be used both for axial and radial turbines.

Modelling options

The actual gas used in the component is determined by the replaceable Medium package. In the case of multiple component, variable composition gases, the start composition is given by Xstart, whose default value is Medium.reference_X.

The following options are available to calculate the enthalpy of the outgoing gas:

• explicitIsentropicEnthalpy = true: the isentropic enthalpy hout_iso is calculated by the Medium.isentropicEnthalpy function.
• explicitIsentropicEnthalpy = false: the isentropic enthalpy is determined by equating the specific entropy of the inlet gas gas_in and of a fictitious gas state gas_iso, with the same pressure of the outgoing gas; both are computed with the function Medium.specificEntropy.

Contents

Name	Description
Medium

Revisions

• 13 Apr 2005 by Francesco Casella:
  Medium.BaseProperties gas_outremoved.
• 14 Jan 2005 by Francesco Casella:
  Adapted to Modelica.Media.

Turbine model restructured using inheritance.
• 5 Mar 2004 by Francesco Casella:
  First release.