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Impact of Anisotropy on the Thermal Performance of Enhanced Geothermal Systems (2017-2021)

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Investigator(s): Rita Esuru Okoroafor

Accurate prediction of the thermal performance of Enhanced Geothermal Systems (EGS) depends on an understanding of how the heat transport is affected by the presence of the fracture(s) – the primary flow conduit of EGS. These fractures may have aperture variability that could create channels and alter flow paths, affecting the availability of surface area for heat transfer.  

This study aimed to understand the fracture topology, investigate how it can impact flow and heat transport, and demonstrate ways Enhanced Geothermal Systems can be harnessed to optimize thermal performance.


1. Okoroafor, Esuru R., Horne, Roland N. (2019, February 14). Thermal Performance Implications of Flow Orientation Relative to Fracture Shear Offset in Enhanced Geothermal Systems. 43rd Stanford Geothermal Workshop.

2. Okoroafor, Esuru R., Horne, Roland N. (2018, September 16). The Impact of Fracture Roughness on the Thermal Performance of Enhanced Geothermal Systems. 42nd GRC Annual Meeting and Expo.

3. Okoroafor, Esuru R., Williams, Michael J, Gossuin, Jean, Jimoh-Kenshiro Olalekan, Horne, Roland N. (2021, February 18). Comparison of EGS Thermal Performance with CO2 and Water as Working Fluids. 46th Stanford Geothermal Workshop.

4. Okoroafor, Esuru R., Hawkins, Adam J., Horne, Roland N. (2020, February 13). Constant Viscosity Versus Temperature-Dependent Viscosity: Consequences for the Numerical Modeling of Enhanced Geothermal Systems. 44th Stanford Geothermal Workshop.