Greenberg, Laurence A.Stemer, Werner H.Locher, Ralph E.
인용정보
피인용 횟수 :
4인용 특허 :
3
초록▼
As the development of gas and steam turbine systems has progressed, the steam turbine section, in particular, has become highly sophisticated and complex by being configured as a three-pressure system. In order to make a gas and steam turbine system of economic interest for medium and low power leve
As the development of gas and steam turbine systems has progressed, the steam turbine section, in particular, has become highly sophisticated and complex by being configured as a three-pressure system. In order to make a gas and steam turbine system of economic interest for medium and low power levels as well, and with high efficiencies, the steam turbine section is configured as a two-pressure system, and the combustion air for the system is compressed in at least two stages. In the process, the combustion air is cooled after at least one compression stage, and is heated at least after the last stage of the two stages.
대표청구항▼
1. A gas and steam turbine system for generating electricity, comprising: a steam turbine, said steam turbine having a power rating; a gas turbine producing an exhaust gas and having a power rating approximately equal to three-times said power rating of said steam turbine; a steam generator rec
1. A gas and steam turbine system for generating electricity, comprising: a steam turbine, said steam turbine having a power rating; a gas turbine producing an exhaust gas and having a power rating approximately equal to three-times said power rating of said steam turbine; a steam generator receiving and heated by the exhaust gas from said gas turbine, said steam generator having a high-pressure steam generator and a low-pressure steam generator each generating superheated steam and being connected to and supplying said steam turbine with the superheated steam; a compressing device receiving combustion air and connected to and supplying the combustion air to said gas turbine, said compressing device having at least two stages for compressing the combustion air; an air/water heat exchanger connected to said compressing device and connected to said steam generator and receiving boiler supply water from said steam generator; and an air preheater connected to said compressing device, the combustion air being cooled by said air/water heat exchanger after at least one of said two stages in said compressing device, and being heated by said an air preheater using said exhaust gas after a last of said two stages of said compressing device. 2. The gas and steam turbine system according to claim 1, including a combustion chamber connected between said air preheater and said gas turbine, said air preheater connected to and receiving the exhaust gas from said gas turbine, and the combustion air being heated before entering said combustion chamber in said air preheater by the exhaust gas from said gas turbine. 3. The gas and steam turbine system according to claim 1, including a condenser producing condensation and connected between said steam generator and said compressing device, the condensation emerging from said condenser being split into a first flow element and a second flow element of approximately equal magnitude, said first flow element supplied to said high-pressure steam generator and said second flow element supplied to said low-pressure steam generator. 4. The gas and steam turbine system according to claim 3, wherein said low-pressure section of said steam turbine has an inlet and said first flow element and said second flow element of the condensation are recombined again at said inlet of said low-pressure section of said steam turbine. 5. The gas and steam turbine system according to claim 4, wherein said high-pressure steam generator and said low-pressure steam generator are disposed downstream from said air preheater and combined have a high-pressure superheater, a low-pressure superheater, a high-pressure vaporizer, a high-pressure preheater, a low-pressure vaporizer and a low-pressure preheater, and the exhaust gas from said gas turbine successively heats said high-pressure superheater, said low-pressure superheater, said high-pressure vaporizer, said high-pressure preheater, said low-pressure vaporizer, and said low-pressure preheater. 6. The gas and steam turbine system according to claim 1, wherein said two stages are compressors having equivalent compression powers. 7. The gas and steam turbine system according to claim 1, wherein a heating power for heating the combustion air in said air preheater is approximately equal to five-times a cooling power of said air/water heat exchanger. 8. The gas and steam turbine system according to claim 5, wherein a heating power introduced by the exhaust gas into said high-pressure steam generator and into said low-pressure steam generator together is virtually twice as great as a heating power in said air preheater. 9. The gas and steam turbine system according to claim 5, wherein when the exhaust gas emerges from said low-pressure steam generator, the exhaust gas is at a temperature of less than 100° C.
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이 특허에 인용된 특허 (3)
Malohn Donald (Scottsdale AZ), Cogeneration system with recuperated gas turbine engine.
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