Method and device for operating a steam turbine comprising several no-load or light-load phases
AssigneeSiemens Aktiengesellschaft
InventorsEdwin Gobrecht, Juergen Havemann, Norbert Henkel, Michael Wechsung
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Abstract
A method and a device are for operating a steam turbine in which includes several no-load or light-load phases. All phases are supplied with steam in order to ensure good preheating. The supply of a phase is selected in such a way that the phase produces the least possible output, preferably no output. The enthalpy differential between the entrance to and exit from the phase is thus preferably reduced to zero.
Claims23
A method for operating a steam turbine including a plurality of stages, comprising:
- admitting steam to each of the stages, wherein a stage which delivers as relatively little power as possible is selected for admission of steam, and wherein enthalpy of the steam at an inlet into the selected stage and enthalpy of the steam at an outlet of the selected stage are determined and the enthalpy difference between the inlet and the outlet is minimized.
A device for distributing steam to individual stages of a steam turbine, comprising:
- a first measuring station for recording enthalpy of a mass flow supplied to a stage;
- a second measuring station for recording enthalpy of a mass flow emerging from the stage;
- a comparison unit for determining an enthalpy difference;
- and
- a unit for adjusting the mass flow supplied to the stage.
A device for distributing steam to individual stages of a steam turbine, comprising:
- first measuring means for recording enthalpy of a mass flow supplied to a stage;
- second measuring means for recording enthalpy of a mass flow emerging from the stage;
- comparison means for determining an enthalpy difference;
- and
- means for adjusting the mass flow supplied to the stage.
A method for distributing steam to individual stages of a steam turbine, comprising:
- recording enthalpy of a mass flow supplied to a stage;
- recording enthalpy of a mass flow emerging from the stage;
- determining an enthalpy difference;
- and
- adjusting the mass flow supplied to the stage.
Dependencies are inferred from the claim text.