Gas-and-Steam Combined-Cycle Power Plant

Abstract

The present disclosure relates to power plants. Various embodiments thereof may include a method for operating a gas-and-steam combined-cycle power plant. For example, some embodiments may include a method for operating a gas-and-steam combined-cycle power plant including: providing exhaust gas from a gas turbine to a steam generator; generating steam by means of the exhaust gas; driving a generator with the steam via a turbine installation to provide an electric current; removing the exhaust gas from the steam generator; and using at least a portion of heat contained in the exhaust gas downstream from the steam generator to affect an endothermic chemical reaction.

What is claimed is: 
     
         1 . A method for operating a gas-and-steam combined-cycle power plant, the method comprising:
 providing exhaust gas from a gas turbine to a steam generator;   generating steam by means of the exhaust gas;   driving a generator with the steam via a turbine installation to provide an electric current;   removing the exhaust gas from the steam generator; and   using   at least a portion of heat contained in the exhaust gas downstream from the steam generator to affect an endothermic chemical reaction.   
     
     
         2 . The method as claimed in  claim 1 , wherein the at least a portion of the heat contained in the exhaust gas downstream from the steam generator is transferred via a heat exchanger to educts of the endothermic chemical reaction. 
     
     
         3 . The method as claimed in  claim 1 , further comprising:
 branching-off at least some of the steam generated by the steam generator and storing the at least some of the steam in a steam accumulator;   removing at least a portion of the steam stored in the steam accumulator from the steam accumulator;   heating the at least a portion of the steam removed from the steam accumulator with heat released in an exothermic chemical reaction; and   routing the heated steam to the turbine installation to drive the turbine installation with the heated steam.   
     
     
         4 . The method as claimed in  claim 3 , further comprising using products of the endothermic chemical reaction as educts of the exothermic chemical reaction. 
     
     
         5 . The method as claimed in  claim 3 , further comprising supplying the heated steam to the turbine installation to ramp up the gas-and-steam combined-cycle power plant from a first load range into a second load range that is higher than the first load range. 
     
     
         6 . The method as claimed in  claim 5 , wherein the endothermic chemical reaction is affected in the second load range. 
     
     
         7 . (canceled)