Combined gas turbine and steam turbine power plant

Claim 1

INSTALLATION FOR PRODUCING POWER COMPRISING A GAS TURBINE PLANT HAVING A SUBSTANTIALLY CONSTANT OUTPUT COMBINED WITH A STEAM TURBINE PLANT HAVING A VARIABLE OUTPUT; SAID STEAM TURBINE PLANT COMPRISING A SEAM TURBINE AND A BOILDER FOR PRODUCING STEAM AT COMPARATIVELY LOW PRESSURE, THE STEAM OUTLET FROM SAID BOILER BEING CONNECTED TO THE INLET TO SAID STEAM TURBINE AND THE OUTLET FROM SAID STEAM TURBINE BEING CONNECTED TO THE WATER INLET TO SAID BOILER VIA A STEAM CONDENSER; SAID GAS TURBINE PLANT HAVING A SUBSTANTIALLY CONSTANT POWER OUTPUT NOTWITHSTANDING A CHANGE IN LOAD ON THE COMBINED POWER PLANT AND COMPRISING A GAS TURBINE, AN AIR COMPRESSOR DRIVEN BY SAID GAS TURBINE AND A COMBUSTION CHAMBER, THE AIR COMPRESSED IN SAID COMPRESSOR BEING FED TO SAID COMBUSTION CHAMBER FOR COMBUSTION OF FUEL SUPPLIED TO SAID COMBUSTION CHAMBER AT A SUBSTANTIALLY CONSTANT RATE, AND THE PRODUCTS OF COMBUSTION BEING DELIVERED FROM SAID COMBUSTION CHAMBER TO THE INLET OF SAID GAS TURBINE; SAID GAS TURBINE AND STEAM TURBINE PLANTS BEING SO DIMENSIONED THAT SAID GAS TURBINE PLANT IS ABLE TO SUPPLY THE GREATER PART OF THE BASE LOAD OF THE INSTALLATION WHILE SAID STEAM TURBINE PLANT IS ABLE TO SUPPLY THE ADDITIONAL OUTPUT REQUIRED AT STEEP AND RAPIDLY VARYING PEAK LOADS; CONDUIT MEANS DELIVERING THE GAS EXHAUST FROM THE OUTLET FROM SAID GAS TURBINE TO SAID BOILER FOR HEATING THE WATER TO PRODUCE STEAM, SAID BOILER HAVING A HEAT STORAGE CAPACITY SUCH AS TO ABSORB AND STORE SURPLUS HEAT DURING LOAD TROUGHS BY MEANS OF TEMPERATURE AND PRESSURE INCREASE AND THEREBY ENABLE IT TO SUPPLY THE ADDITIONAL STEAM REQUIREMENTS AT TIMES OF PEAK LOADS BY MEANS OF A PRESSURE DECREASE THEREIN; AND A REGULATING DEVICE RESPONSIVE TO THE LOAD PEAK COMPONENT TO BE SUPPLIED BY SAID STEAM TURBINE PLANT FOR REGULATING ONLY THE FLOW OF STEAM FROM SAID BOILER TO SAID STEAM TURBINE IN ACCORDANCE WITH THE CHANGE IN LOAD.