.ThermoPower.Gas.BaseClasses.CombustionChamberBase

Information

The metal wall temperature and the heat transfer coefficient between the wall and the fluid are uniform. The wall is thermally insulated from the outside. It has been assumed that inlet gases are premixed before entering in the volume.

Modelling options

This model has three different Medium models to characterize the inlet air, fuel, and flue gas exhaust.

If gamma = 0, the thermal effects of the surrounding walls are neglected.

There are two ways to obtain correct energy balances. The first is to explicitly set the lower heating value of the fuel HH, and use medium models that do not include the enthalpy of formation, by setting excludeEnthalpyOfFormation = true, which is the default option in Modelica.Media. As the heating value is usually provided at 25 degC temperature, it is also necessary to set referenceChoice =ReferenceEnthalpy.ZeroAt25C in all medium models for consistency. This is done in the medium models contained within ThermoPower.Media.

Alternatively, one can set excludeEnthalpyOfFormation = false in all media and set HH = 0. By doing so, the heating value is automatically accounted for by the difference in the enthalpy of formation.

Contents

Name	Description
Air
Fuel
Exhaust

Revisions

• 30 May 2005 by Francesco Casella:
  Initialisation support added.
• 31 Jan 2005 by Francesco Casella:
  CombustionChamber model restructured using inheritance.

  First release.