Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange

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United States of America Patent

PATENT NO 9444378
APP PUB NO 20130307269A1
SERIAL NO

13952440

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control.

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Patent Owner(s)

  • LIGHTSAIL ENERGY, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Berlin,, Jr Edwin P Oakland, US 67 2061
Crane, Stephen E Santa Rosa, US 68 2933
Fong, Danielle A Oakland, US 64 2574

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