Why CO2 Geothermal?
The most abundant and concentrated source of clean, renewable, baseload, and flexible energy is not solar, wind, hydropower, or biomass. Rather, it is right underneath our feet in the form of geothermal heat. The challenge has long been how to harness that energy and bring it to the surface economically, while at the same time reducing project development timeframes and risk. The impediment to global geothermal energy exploitation is the very fluid that all other utility-scale facilities currently use: water. Conventional geothermal technologies are simply not applicable or economic outside a comparatively small number of sites. In order to help solve the global clean-energy problem, we must find ways to increase the use of this vast energy resource without the use of water, and to do so in a faster timeframe and in a more scalable, predictable manner with far less risk.
GreenFire Energy’s ECO2G™ geothermal energy system design accomplishes this while presenting a solution to all three of our planet’s most critical problems: climate change, fresh water supply, and the global availability of affordable, clean energy. The earth is rich in geothermal heat and supercritical CO2 (SCO2) is a far superior fluid than water for collecting that heat and for driving highly efficient turbines. This fluid can be contained and controlled in the first-of-its-kind utility-scale, closed-loop design being developed by GreenFire Energy. GreenFire's use of SCO2, along with advanced, existing directional drilling and turbine technologies, are what make this game-changing ECO2G™ design possible.
With vast global potential, ECO2G™ has superior economics rivaling those of natural gas, does not employ the use of controversial fracking techniques, and does not depend upon clean-tech incentives. Instead of contributing to the problems of greenhouse gas emissions and water consumption, ECO2G™ employs the use of one of the primary culprits of our changing climate, carbon dioxide, as the geothermal working fluid, and does so with zero CO2 emissions and zero water consumption.
GreenFire Energy is a development-stage company currently conducting detailed “proof of concept” projects to prepare for commercial operations in 2016.
41st Annual Stanford Geothermal Workshop
February 22-24, 2016
Palo Alto, CA
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