Compressed gas energy storage system
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United States of America Patent
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Jan 26, 2016
Grant Date -
Apr 25, 2013
app pub date -
Oct 18, 2012
filing date -
Oct 18, 2011
priority date (Note) -
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Abstract
Embodiments relate generally to energy storage systems, and in particular to energy storage systems using compressed gas as an energy storage medium. In various embodiments, a compressed gas storage system may include a plurality of stages to convert energy into compressed gas for storage, and then to recover that stored energy by gas expansion. In certain embodiments, a stage may comprise a reversible compressor/expander having a reciprocating piston. Pump designs for introducing liquid for heat exchange with the gas, are described. Gas flow valves featuring shroud and/or curtain portions, are also described.
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