Abstract: In a method for increasing the power output of a combined-cycle power station, comprising at least one gas turbo group, at least one heat recovery steam generator and at least one steam turbo group, with the gas turbo group comprising at least one compressor, at least one combustion chamber and at least one gas turbine, the heat recovery steam generator having at least one pressure stage and the steam turbo group comprising at least one steam turbine, in which combined-cycle power station air is compressed in a compressor, is then supplied as combustion air to a combustion chamber, the hot gas which is produced there is passed to a gas turbine, and the exhaust gas from the gas turbine is used in a heat recovery steam generator to produce steam for a steam turbo group, an immediate and rapid increase in the power output is achieved, and an additional power output from the combined-cycle power station is maintained in safe operating conditions, in that an supplemental firing is arranged to provide additional he

Abstract: A method for setting or regulating the steam temperature of the live steam and/or reheater steam, in particular under part load, in a combined-cycle power plant and a combined-cycle power plant so regulated. The power-plant has a water/steam cycle including a steam turbine, fired boiler and a means for superheating or reheating the steam generated in the boiler to form live steam or reheater steam, a gas turbine set, and a downstream heat recovery steam generator connected to the water/steam cycle in such a way that steam generated in the heat recovery steam generator is admixed with the live steam or reheater steam. Improved part-load behavior is achieved in that the steam temperature of the live steam and/or reheater steam is set or regulated by setting or regulating the steam temperature of the steam generated in the heat recovery steam generator.

Abstract: An integrated power plant comprises a gas-turbine set with a compressor, a combustion chamber and a gas turbine, a heat-recover boiler arranged downstream of the gas turbine, and a water/steam circuit with a steam turbine, a condenser, a feedwater tank and a separately fired steam generator having a flue-gas NOx-reduction unit arranged on the flue-gas side downstream of the steam generator, the heat-recovery boiler for the generation of steam being incorporated in the water/steam circuit. In such a power plant, in order to improve the part-load behavior, a branch line is provided at the heat-recovery boiler, by means of which branch line a predetermined portion of the exhaust gases coming from the gas-turbine set and flowing through the heat-recovery boiler can be branched off and added upstream of the flue-gas NOx-reduction unit to the flue gases coming from the steam generator.

Abstract: In a method for operating a gas turbo group, partial streams of compressed air are cooled in cooling air coolers and are used as cooling air for thermally highly stressed components of the gas turbo group. The cooling air coolers are constructed as steam generators. Steam generated in the cooling air coolers is fed in part to the gas turbo group and is expanded there while providing usable power, while another part of the steam is fed into the cooling system, where the steam displaces air, which air then becomes available again to the gas turbine process. In this way, the steam generated with the help of heat removed from the cooling air is re-used.

Abstract: A method for setting or regulating the steam temperature of the live steam and/or reheater steam, in particular under part load, in a combined-cycle power plant and a combined-cycle power plant so regulated. The power-plant has a water/steam cycle including a steam turbine, fired boiler and a means for superheating or reheating the steam generated in the boiler to form live steam or reheater steam, a gas turbine set, and a downstream heat recovery steam generator connected to the water/steam cycle in such a way that steam generated in the heat recovery steam generator is admixed with the live steam or reheater steam. Improved part-load behavior is achieved in that the steam temperature of the live steam and/or reheater steam is set or regulated by setting or regulating the steam temperature of the steam generated in the heat recovery steam generator.

Abstract: In a method for operating a combined cycle power plant (15) with at least two power plant units (16A, . . . , 16D), each of which includes a water/steam cycle, an accelerated start-up is achieved in a simple manner by removing a heat-transporting fluid from another operating power plant unit and using it for the preheating and/or maintaining of the heat of individual components of the water/steam cycle in one of the power plant units (16A, . . . , 16D).

Abstract: The present invention relates to a method for preventing the deposition of contaminants in steam systems. In a method of this type, deposits are prevented in a simple and economic manner by metering an additive into the steam, which additive adheres to the steam-side surface of the steam system and has the effect of repelling moisture and contaminants.

Abstract: A system (1) generating saturated steam is replaced by at least one gas turbine set (29, 30, 31, 36), at least one waste-heat boiler (32) and at least one back-pressure steam turbine (37). The back-pressure steam turbine (37) is coupled to the gas turbine set (29, 30, 31, 36), which back-pressure steam turbine is supplied by the steam generated in the waste-heat boiler (32). The exhaust steam of the back-pressure steam turbine (37) is supplied to the saturated-steam medium-pressure steam turbine (4).

Abstract: In a method for setting or regulating the steam temperature of the live steam and/or reheater steam, in particular under part load, in a combined-cycle power plant (22) which comprises a water/steam cycle (20), in particular with a steam turbine (38), with a fired boiler (50) and with means (42, 51) for superheating or reheating the steam generated in the boiler (50) to form live steam or reheater steam, and also a gas turbine set (23) with a downstream heat recovery steam generator (28), the heat recovery steam generator (28) being connected to the water/steam cycle (20) in such a way that steam generated in the heat recovery steam generator (28) is admixed with the live steam or reheater steam, improved part-load behavior is achieved in that the steam temperature of the live steam and/or reheater steam is set or regulated by setting or regulating the steam temperature of the steam generated in the heat recovery steam generator (28).

Abstract: A saturated steam generation system is supplemented with at least one gas turbine set, at least one heat recovery steam generator, at least one topping steam turbine and at least one steam mixing component. The topping steam turbine is coupled to the gas turbine set and is supplied by the steam generated in the heat recovery steam generator. The exhaust steam from the topping steam turbine is fed via the steam mixing component to the steam turbine set.

Abstract: The startup time or the output gradient of a gas turbine plant during startup are limited by the maximum permissible temperature gradient. The increase in the fuel mass flow supplied, if appropriate in combination with the combustion-air mass flow supplied, is consequently also limited. In order to accelerate the startup and to increase the output gradient during startup, then, an additional working medium, for example water or steam, increasing the mass flow flowing through the turbine is supplied at the same time as the fuel mass flow and/or combustion-air mass flow. The output gradient is therefore increased with the maximum permissible temperature gradient remaining the same, so that a required output is reached more rapidly.

Abstract: A system (1) generating saturated steam is replaced by at least one gas turbine set (29, 30, 31, 36), at least one waste-heat boiler (32) and at least one back-pressure steam turbine (37). The back-pressure steam turbine (37) is coupled to the gas turbine set (29, 30, 31, 36), which back-pressure steam turbine is supplied by the steam generated in the waste-heat boiler (32). The exhaust steam of the back-pressure steam turbine (37) is supplied to the saturated-steam medium-pressure steam turbine (4).

Abstract: In a method for preventing the deposition of impurities in steam systems, in which steam of a given steam quality flowing in them is subject to temperature and/or pressure changes, a simple prevention of deposits is achieved in that an appropriate structural configuration and design of the steam systems prevents the steam solubility of the impurities present in specific concentrations in the steam from being exceeded as a result of changes in the temperature and/or pressure conditions.

Abstract: The invention relates to a method of heating a liquid medium by means of a first thermal system (2, 3, 4, 7, 12, 13) and at least one second thermal system (5, 6, 6A, 15, 16) following said first thermal system (2, 3, 4, 7, 12, 13), which thermal systems each have at least one heat exchanger (2, 5) through which the medium flows, and which second thermal system (5, 6, 6A, 15, 16) is operated at a higher temperature level than the first thermal system (2, 3, 4, 7, 12, 13). The method is characterized in that, for the accelerated raising of the temperature of the medium in the first thermal system (2, 3, 4, 7, 12, 13), the direct feed of the medium to the same is reduced and in the extreme case prevented, and in that medium flowing through the first thermal system (2, 3, 4, 7, 12, 13) is directed in a circuit. The invention also relates to a plant for carrying out the method.

Abstract: The present invention relates to a flow machine with a compressor (2) and at least one turbine (5), and in which an air intake booster (3) is arranged in an intake duct (1) of the compressor (2), and an exhaust gas booster (9) is arranged in an exhaust gas duct (8) of the at least one turbine (4) [sic]. In operation of the flow machine, the individual booster stages are operated, singly or in combination, in dependence on the specific operating conditions.

Abstract: The invention relates to a method of heating a liquid medium by means of a first thermal system (2, 3, 4, 7, 12, 13) and at least one second thermal system (5, 6, 6A, 15, 16) following said first thermal system (2, 3, 4, 7, 12, 13), which thermal systems each have at least one heat exchanger (2, 5) through which the medium flows, and which second thermal system (5, 6, 6A, 15, 16) is operated at a higher temperature level than the first thermal system (2, 3, 4, 7, 12, 13). The method is characterized in that, for the accelerated raising of the temperature of the medium in the first thermal system (2, 3, 4, 7, 12, 13), the direct feed of the medium to the same is reduced and in the extreme case prevented, and in that medium flowing through the first thermal system (2, 3, 4, 7, 12, 13) is directed in a circuit. The invention also relates to a plant for carrying out the method.

Abstract: A method of heating a liquid medium by means of a first thermal system and at least one second thermal system following the first thermal system and a plant for carrying out the method. The thermal systems each have at least one heat exchanger through which the medium flows, and the second thermal system is operated at a higher temperature level than the first thermal system. The method includes the reduction or prevention of the direct feed of the medium to the first thermal system for the accelerated raising of the temperature of the medium in the first thermal system. The medium flowing through the first thermal system is directed in a circuit.

Abstract: A tank (1) having saturated water (2) is connected to a pump (5) via a suction line (4). The actual values of the pressure and/or temperature in the tank (1) are detected to a measuring arrangement (7) and supplied to a control apparatus (8), in which the actual values are compared with fixed values. In a water reservoir (9) there is admixing water, the temperature of which is lower than the actual temperature in the tank (1). This water reservoir (9) is connected to the suction line (4) via an inflow line (11). An actuator (12) which is activated by the control apparatus (8) is arranged in the inflow line (11). When the actual values in the tank (1) reach the fixed values, so that the pump (5) could experience cavitation, the actuator (12) is opened by means of the control apparatus (8), in order to introduce admixing water into the suction line (4).

Abstract: The startup time or the output gradient of a gas turbine plant during startup are limited by the maximum permissible temperature gradient. The increase in the fuel mass flow supplied, if appropriate in combination with the combustion-air mass flow supplied, is consequently also limited. In order to accelerate the startup and to increase the output gradient during startup, then, an additional working medium, for example water or steam, increasing the mass flow flowing through the turbine is supplied at the same time as the fuel mass flow and/or combustion-air mass flow. The output gradient is therefore increased with the maximum permissible temperature gradient remaining the same, so that a required output is reached more rapidly.

Abstract: Connected in a water circuit for cooling or heating gaseous fuel in a fuel system for a gas turbine plant is a gas/liquid separation apparatus which serves to separate gases contained in the water from the water, and to detect them. The container of the separation apparatus is split up by a partition into a water entry chamber and a water exit chamber. The incoming water flow is split up in the water entry chamber into an upward-flowing and a downward-flowing water flow. Located above the water is a gas-filled space into which gas bubbles disperse. The upward-flowing water flows over an overflow weir, and the downward-flowing water flows into the water exit chamber through openings in the lower region of the partition. The separation apparatus thus includes a calm, free water level in the water entry chamber, and an irrotational flow from the water exit chamber.