Carbon dioxide-based geothermal energy generation systems and methods related thereto
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United States of America Patent
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Sep 16, 2014
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app pub date -
Oct 30, 2012
filing date -
Mar 13, 2009
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Abstract
A system comprises an injection well for accessing an underground reservoir having a first temperature. The reservoir is located below a caprock and is accessible without using large-scale hydrofracturing. The injection well includes an injection well reservoir opening in fluid communication with the reservoir. The system also includes a production well having a production well reservoir opening in fluid communication with the reservoir. A working-fluid supply system provides a non-water based working fluid to the injection well at a second temperature lower than the first temperature. Exposure of the non-water based working fluid to the first temperature produces heated non-water based working fluid capable of entering the production well reservoir opening. An energy converting apparatus connected to the productions well converts thermal energy contained in the heated non-water based working fluid to electricity, heat, or combinations thereof.
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