Progress in CO2-based EGS
- Key words
- Carbon dioxide, CO2, EGS, enhanced geothermal systems, thermosiphon, hot dry rock, hot wet rock
- Conference
- Australian Geothermal Energy Conference
- Year
- 2010
- Language
- English
Full text
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Abstract
The concept of Engineering Geothermal Systems (EGS) using CO2 as a heat extraction fluid has been expanded since it was first proposed. A better theoretical understanding is available for the behaviour in the reservoir, process design, corrosion & condensation issues, and rock geochemistry, although knowledge of some of these systems is incomplete. Sufficient understanding is now available to provide a power plant design given site and reservoir parameters, and viability can be estimated. A number of challenges remain, however, and these must be addressed for the concept to be realisable. Those challenges are contextualised here to provide focus for the most urgent issues to be addressed.
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