Compressed gas energy storage system with cooling capability
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United States of America Patent
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Jun 3, 1997
Grant Date -
N/A
app pub date -
Oct 14, 1994
filing date -
Oct 14, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
One aspect of the present invention relates to a process of cogeneration utilizing a compressed gas energy storage system which includes a gas storage area, a compression train for pressurizing a gas to be stored in the gas storage area, and an expansion train for depressurizing high pressure gas released from the gas storage area. The process includes operating the compression train during off-peak electricity utilization periods to produce a compressed gas. The compressed gas is stored in the gas storage area and later released during peak electricity utilization periods through the expansion train to generate electricity. This reduces the compressed gas pressure and temperature. The gas can then be used for refrigeration by contacting it with a material to be chilled with that gas. One aspect of this invention involves generating electricity and effecting refrigeration by depressurization of natural gas from high pipeline transmission pressures to lower distribution pressures. A procedure for energy recovery is also disclosed.
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