TH53205A - Methods and systems for power generation - Google Patents

Abstract

The DC60 power generation method and system incorporates a combined cycle power system with a gas turbine. This gas turbine has a compressor section to receive compressed air. This compressed air is fed to the combustion unit, where it is mixed with fuel and burned to produce heated combustion gases. These gases expand in an expansion section, generating work on the shaft, which is then used to drive a generator or alternator for electricity production. The heated combustion gases exit the expansion unit as turbine exhaust, where they are cooled by transferring at least a portion of their heat to the air preceding the combustion unit. This is cooled by transferring at least a portion of the exhaust heat to the air before the combustion device.

Claims (11)

1. The method for generating electricity in a combined-generation power plant involves the combustion of a fuel-air mixture in a combustion unit and the production of turbine exhaust gases. This combined method includes: cooling the turbine exhaust gases by heat exchange with the air before introducing the air into the combustion unit; adding liquid to the combustion air after heat exchange with the turbine exhaust gases and before introducing the air into the combustion unit; and further cooling of the turbine exhaust gases to produce the combined-generation products. 2. Method for generating electricity in a combined-generation power plant under Claim 1, where the turbine exhaust gases are cooled using internal heat to heat the fluid. 3. Method for generating electricity in a combined-generation power plant under Claim 1, where the turbine exhaust gases are cooled using internal heat to produce steam. 4. In combined-generation power plants that produce one or more types of combined-generated products (CGMs), methods for reducing the amount of COMMUSED ...ED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMMED COMM 5. The method of claim 4, which is further incorporated with the prior transfer of water to the compressed air prior to the transfer of compressed air to the combustion device. 6. Method of claim 4 or 5, where the flow rate of water delivered to the compressed air is controlled based on the temperature of the compressed air delivered to the combustion device. 7. Method of claim 4, where the fuel flow rate delivered to the combustion apparatus is controlled based on the temperature of the combustion gases heated at the inlet of the gas turbine expansion apparatus. 8. Method of claim 7, where the gas turbine is controlled to operate at a level lower than the maximum fuel and air flow rates. 9. Method of claim 5, where water is heated by the exhaust gases of the expansion device after cooling before being conveyed to compressed air, and where the fuel flow rate conveyed to the combustion device is controlled based on the temperature of the heated combustion gases at the inlet of the gas turbine expansion device. 10. Method of claim 9, where the gas turbine is controlled to operate at a level lower than the maximum fuel and air flow rates. 11. One of the methods of claims 6 through 10, in which the temperature of the compressed air delivered to the combustion apparatus is maintained high enough to prevent water condensation.