Geothermal energy

Fig.1 Geothermal resource favorability and identified hydrothermal sites

Fig.2 A cross-section of the Fervo horizontal doublet EGS system and deep vertical monitoring well.

Geothermal energy is energy extracted from the heat stored beneath the Earth's surface by means of water (or steam) circulating in deep wells. Geothermal systems for homes don't make electricity; instead, they use the sustained temperature of the ground to heat or cool a building or buildings. See the Geothermal power article on Wikipedia for details.

• Geothermal Energy: How Big is the Potential? Sabine Hossenfelder, 2023. Dr. Hossenfelder's skeptical review of geothermal well failures.
  
• Enhanced Geothermal Shot Analysis for the Geothermal Technologies Office (NREL 2023) Chad Augustine, et.al. National Renewable Energy Laboratory Technical Report NREL/TP-5700-84822.
  
• Fervo Energy website - recommended by WJ Koch in RvN Debate 9/10/23
  
• Fervo Energy | Future of Technology Talk A presentation by Tim Latimer, CEO of Fervo Energy, Oct 11, 2022.
  
• Eavor Technologies | The First Scalable Form of Clean Baseload Power video from Disruptive Investing, 2022.
  
• Commercial-Scale Demonstration of a First-of-a-Kind Enhanced Geothermal System Jack H. Norbeck and Timothy M. Latimer, White Paper, Fervo Energy, 2023. See Figure 2. This is a test well intended to demonstrate the economic feasibility of generating power using the latest drilling and fracking technology. Can it provide energy cheaper than coal? That is the question they must answer.
  
• 2022 GETEM Geothermal Drilling Cost Curve Update, Robins, Jody C., Devon Kesseli, Erik Witter, and Greg Rhodes. 2022. National Renewable Energy Laboratory. NREL/CP-5700-82771.