A method for operating a gas turbine engine (10), including a first compressor (14), a second compressor (16), and a turbine (20), coupled together in serial flow arrangement. The method includes channeling compressed airflow (53) discharged from the first compressor through an intercooler (50) having a cooling medium flowing therethrough, operating the intercooler such that condensate is formed in the intercooler from the compressed airflow, and channeling the condensate to an inlet (26,30) of the first or second compressor to facilitate reducing an operating temperature of the gas turbine engine.

Methods and apparatus for operating gas turbine engines

Methods and systems for low emission power generation in hydrocarbon recovery processes are provided. One system includes integrated pressure maintenance and miscible flood systems with low emission power generation. An alternative system provides for low emission power generation, carbon sequestration, enhanced oil recovery (EOR), or carbon dioxide sales using a hot gas expander and external combustor. Another alternative system provides for low emission power generation using a gas power turbine to compress air in the inlet compressor and generate power using hot carbon dioxide laden gas in the expander. Other efficiencies may be gained by incorporating heat cross-exchange, a desalination plant, co-generation, and other features.

Low emission power generation and hydrocarbon recovery systems and methods

A gas turbine unit as well as a method for operating a gas turbine unit is proposed. A very quick and at the same time easily controllable augmentation or reduction of shaft power being produced by the gas turbine can be achieved by providing at least one liquid droplet injection device (32) on the upstream side of compressor (1, 2) for injecting liquid into the stream of intake air (10) in order to increase the shaft power generated by the gas turbine unit. The amount of water mass flow corresponding to the desired increase or decrease of shaft power output of the gas turbine unit is added or reduced in the form of liquid droplets in a substantially stepless manner and immediately within a time interval that is determined by the design characteristics of the liquid droplet injection device (32).

Method and apparatus for achieving power augmentation in gas turbines using wet compression

A power generation system includes a gas turbine system. The turbine system includes a combustion chamber configured to combust a fuel stream a compressor configured to receive a feed oxidant stream and supply a compressed oxidant to the combustion chamber and an expander configured to receive a discharge from the combustion chamber and generate an exhaust comprising carbon dioxide and electrical energy. The system further includes a retrofittable exhaust gas recirculation system including a splitter configured to split the exhaust into a first split stream and a second split stream, a heat recovery steam generator configured to receive the first split stream and generate a cooled first split stream and a purification system configured to receive the first cooled split stream and the second split stream and generate a recycle stream, wherein the recycle stream is mixed with the fresh oxidant to generate the feed oxidant stream.

Systems and methods for power generation with exhaust gas recirculation

Various forms of energy, such as mechanical, electrical, and/or heat energy are produced by an energy conversion mechanism (10) which includes a spool (16), the spool (16) including a shaft (22) on which a compressor (18) and turbine (20) are mounted. A generator (23) is operably connected to the energy conversion mechanism (10) for converting mechanical energy into electrical energy. Fuel and air are supplied separately to the compressor (18). A regenerator type heat exchanger (28) has a cold side for conducting compressed air traveling from an outlet of a compressor (18) to an inlet of the turbine (20), a hot side for conducting hot waste gas from the energy conversion mechanism (10), and a rotary core movable sequentially through the cold and hot sides for absorbing heat in the hot side and giving up heat in the cold side. A catalytic combustor (30) combusts the fuel at a location upstream of the turbine (20). During start-up, the catalytic combustor (30) is preheated independently of the heat exchanger (28) by an electric heater (40).

Self-contained energy center for producing mechanical, electrical, and heat energy

A system is disclosed for adjusting a gas turbine firing temperature control algorithm and combustion reference temperature algorithms based on exhaust gas temperature, turbine pressure ratio and compressor discharge temperature for water content in the air entering the compressor differing from the design water content of ambient air. The water content in the ambient air is calculated by the control system from measured data from a dry bulb temperature sensor and a wet bulb temperature or humidity sensor.

System for determining gas turbine firing and combustion reference temperature having correction for water content in combustion air

In a method of operating a combined cycle system including a gas turbine, a steam turbine and a multi-pressure heat recovery steam generator, an improvement includes supplying gas turbine cooling duty steam from a high pressure section of the steam turbine and from an intermediate pressure evaporator in the multi-pressure heat recovery steam generator, conducting the gas turbine cooling duty steam to the gas turbine for cooling hot gas turbine parts, and then returning the gas turbine cooling duty steam to an intermediate pressure section of the steam turbine. In a start-up procedure, steam is extracted from a first pass of a high pressure superheater in the multi-pressure heat recovery steam generator, mixed with steam discharged from the high pressure superheater and then supplied to the gas turbine cooling duty system. In this same start-up procedure, the gas turbine cooling duty steam is returned to the system condenser, bypassing the intermediate pressure section of the steam turbine. Related apparatus is also disclosed.

Combined cycle with steam cooled gas turbine

In a combined cycle system including a gas turbine (412), a steam turbine (420) and a heat recovery steam generator (436), wherein gas turbine exhaust is used in the heat recovery steam generator (436) for reheating steam for the steam turbine (420), an improvement wherein steam is extracted from the high pressure section (422) of the steam turbine 420), conducted to the gas turbine (412) for cooling hot gas turbine parts, and returned to the intermediate pressure section (424) of the steam turbine (420).

Steam cycle for combined cycle with steam cooled gas turbine

Methods and apparatus for fast starting and loading a combined cycle power system are described. In one example embodiment, the method includes loading the gas turbine at up to it's maximum rate, and loading the steam turbine at its maximum rate with excess steam bypassed to the condenser while maintaining the temperature of steam supplied to the steam turbine at a substantially constant temperature from initial steam admission into the steam turbine until all steam generated by the heat recovery steam generator is being admitted to the steam turbine while the gas turbine operates at up to maximum load.

Methods and apparatus for starting up combined cycle power systems

A water-injection control system is disclosed for a water supersaturation system installed in a gas turbine air intake system for augmenting gas turbine power output during operation at high ambient-air temperature, while maintaining the water content in the intake air within limits acceptable to the gas turbine as indicated by measured gas turbine operating parameters. The control system starts, stops, modulates, and limits water supplied to the supersaturating system based on the humidity or dew-point temperature of the ambient air, dry-bulb temperature of the ambient air, compressor inlet air flow, and gas turbine parameters indicating operation at or near maximum output.

Leroy Omar Tomlinson

Papers

System for determining gas turbine firing and combustion reference temperature having correction for water content in combustion air

Combined cycle with steam cooled gas turbine

Steam cycle for combined cycle with steam cooled gas turbine

Methods and apparatus for starting up combined cycle power systems

Control system and method for gas turbine inlet-air water-saturation and supersaturation system