GTherm SWEGS incorporates numerous unique and proprietary features that resolve many of the serious problems associated with EGS and transforms geothermal into a broadly-deployable, non-polluting and cost-effective approach to renewable energy.
GTherm proprietary “closed loop” technology allows for the mining of geothermal heat from hot dry rock (HDR). GTherm SWEGS eliminates the need for hydraulic stimulation and the need to drill injection and production wells. SWEGS is based on a unique HeatNest™ which integrates a down-hole heat exchanger with heat harvesting appendages and a specialized high thermal conductivity grout to maximize heat transfer from the geothermal resource. The heat transfer fluid is pumped down hole through the HeatNest and back to the surface where it is converted into electricity by either a standard binary-cycle generator or an alternative low-temperature generator depending on the thermal resource temperature.
This environmentally-benign, closed-loop approach is not only simpler and more controllable than the combination of injection wells, production wells and artificial reservoirs used in existing EGS, it also eliminates the massive maintenance issues associated with bringing these corrosive, underground fluids to the surface for transformation into electricity.