Patent
Method for providing emergency reserve power using storage techniques for electrical systems applications
TLDR
In this paper, a modified simple cycle combustion turbine power generation system optimized for a "hot" stand-by reserve mode of operation and having a power shaft assembly including a compressor, an expansion turbine, and a double-ended motor/generator between the compressor and the turbine.Abstract:
A combustion turbine power generation system includes a modified simple cycle combustion turbine power generation system optimized for a "hot" stand-by reserve mode of operation and having a power shaft assembly including a compressor, an expansion turbine, and a double-ended motor/generator between the compressor and the turbine. The motor/generator has a turbine driving clutch structure on one end thereof and a compressor driving clutch structure on the other end thereof. A combustor feeds the expansion turbine. The power generation system includes an additional system having a boost compressor, an intercooler feeding cooled air to the boost compressor an electric motor for driving the boost compressor, and aftercooler downstream of the boost compressor. A compressed air energy storage is downstream of the aftercooler. The additional system is integrated with the modified simple cycle combustion turbine power generation system to provide (i) a primary mode of operation--a hot stand-by mode, when the plant is ready to deliver an emergency power at full turbine power of specified duration within a few seconds; (ii) a cold start-up mode of operation, when the plant is ready to deliver an emergency power at full turbine power of specified duration within a few minutes, depending on the specifics of the turbine design, (iii) an emergency power supply mode, when the plant provides emergency power at full turbine power of specified duration; (iv) a combustion turbine emergency power supply mode, when the plant provides approximately 50% of full turbine power of unlimited duration during long term interruptions of the power supply; and (v) a storage charging mode of operation to charge the air storage.read more
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Electric vehicle having multiple-use apu system
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System and method for coordinated control and utilization of local storage and generation, with a power grid
TL;DR: In this article, a grid-interactive or grid-tied power system is proposed to improve the efficiency and functionality of a Grid-Interactive or Grid-Tied Power System.
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Systems and methods for energy storage and recovery using compressed gas
TL;DR: In this article, the authors describe methods and systems for the storage and recovery of energy using open-air hydraulic-pneumatic accumulator and intensifier arrangements that combine at least one accumulator with at least two intensifiers in communication with a high-pressure gas storage reservoir on a gas-side of the circuits and a combination fluid motor/pump, coupled to a combination electric generator/motor on the fluid side.
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Systems and methods for energy storage and recovery using rapid isothermal gas expansion and compression
Troy O. McBride,Benjamin R. Bollinger,Michael G. Izenson,Weibo Chen,Patrick Magari,Benjamin Cameron,Robert Cook,Horst Richter +7 more
TL;DR: In this paper, the authors describe a system and methods for rapidly and isothermally expanding and compressing gas in energy storage and recovery systems that use open-air hydraulic-pneumatic cylinder assemblies, such as an accumulator and an intensifier in communication with a high-pressure gas storage reservoir on a gas-side of the circuits and a combination fluid motor/pump, coupled to a combination electric generator/motor on the fluid side of circuits.
References
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Patent
Compressed air energy storage turbomachinery cycle with compression heat recovery, storage, steam generation and utilization during power generation
TL;DR: In this paper, a thermal energy peaking/intermediate power plant is described with a compression mode in which thermal energy is produced and stored in thermal energy storage device and an expansion mode where such stored thermal energy are utilized to produce steam from water and inject such steam into a combustion process.
Patent
Retrofit of simple cycle gas turbines for compressed air energy storage application
TL;DR: In this paper, a system for retrofitting a plurality of gas turbines for use in compression and expansion stages of a power plant is described, where a first gas turbine is modified to perform as a motor driven air compressor compressing air and storing such compressed air in an air storage device.
Patent
Pumped air storage peaking power system using a single shaft gas turbine-generator unit
TL;DR: In this article, a pumped air storage peaking power system is described, which comprises a standard single shaft gas turbine-generator unit used in conjunction with a system of valves, and the system may be operated in pumping mode for air storage, in peaking mode as an extra-power gas turbine operating with stored compressed air, or as a conventional GA operating with ambient air, all through appropriate valve settings.
Patent
Air ejector augmented compressed air energy storage system
TL;DR: In this article, a variable geometry air ejector was used to adjust the air flow at the constant inlet pressure of a gas turbine system to allow air from a second reservoir to flow into the first reservoir during peak demand periods.
Patent
Compressed air turbomachinery cycle with reheat and high pressure air preheating in recuperator
TL;DR: In this paper, a peaking/intermediate power plant is described as having a compression mode in which air is compressed and stored in a storage device and an expansion mode where such stored compressed air is initially pre-heated by exhaust gas in a recuperator, expanded without combustion in a high pressure turbine, combined with fuel and combusted in a low pressure combustor, and supplied to the recuperators as exhaust gas of sufficient temperature to heat the compressed air.