e926a7c0_ed_technologies___Decarboni_se__Description
[Criteria] General barriers [Description] 
EGS for power generation is still relatively novel technology and remains to be proved on a large scale.The lifetime of HDR geothermal system may be difficult to prove.There are a number of significant issues that need to be resolved. These include the geochemistry of supercritical CO2, the corrosive conditions that arise with CO2 in contact with reservoir water, and long term effects in terms of reservoir connectivity, the source of CO2, the long term retention of CO2, and design and optimisation of power generation systems to work with supercritical CO2.CO2 has a lower specific heat capacity than water, and so greater flows are required to achieve the same heat extraction.Potential barriers to implementation include access to CO2 at an acceptable cost, proximity of the EGS to the electricity grid, and access to cooling water.Similar issues related to long term responsibility for the resultant reservoir, including the liability for future CO2 leakage.There is concern in the Geothermal industry that carbon capture/CCS is a transitionary technology and availability of CO2 in the very long term is raised as a concern.
2. Description of short-listed technologies | Decarboni.se
Description