How does a geothermal power plant generate electricity?

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1. 1

   Geothermal power (Wikipedia)

   WikipediaPublished Oct 10, 2026Checked Oct 11, 2026

   “Geothermal power is electrical power generated from geothermal energy. Technologies in use include dry steam power stations, flash steam power stations and binary cycle power stations. 32 countries had operational geothermal power stations as of 2022. As of 2019, worldwide geothermal power capacity amounts to 15.4 gigawatts (GW), of which 23.9% (3.68 GW) are installed in the United States. International markets grew at an average annual rate of 5 percent over the three years to 2015, and global geothermal power capacity was expected to reach 14.5–17.6 GW by 2020. Based on current geologic knowledge and technology the Geothermal Energy Association (GEA) publicly discloses, the GEA estimates that only 6.9% of total global potential has been tapped so far, while the IPCC reported geothermal power potential to be in the range of 35 GW to 2 TW. Countries generating more than 15 percent of their electricity from geothermal sources include El Salvador, Kenya, the Philippines, Iceland, New Zealand, and Costa Rica. Indonesia has an estimated potential of 29 GW of geothermal energy resources, the largest in the world; in 2017, its installed capacity was 1.8 GW.”

2. 2

   Geothermal power in Iceland (Wikipedia)

   WikipediaPublished Sep 30, 2026Checked Oct 11, 2026

   “Geothermal power in Iceland refers to the use of geothermal energy in Iceland for electricity generation. Iceland's uniquely active geology has led to natural conditions especially suitable for harnessing geothermal energy. Icelanders have long used geothermal energy for direct applications, such as heating homes and baths. The more recent, widespread adoption of geothermal energy as an energy source in Iceland was spawned by a need to stabilize energy prices and increase energy independence, allowing Iceland to increase reliance on geothermal energy for direct applications alongside electricity generation and contributing significantly to diminishing Iceland's carbon footprint. The growth of geothermal power in Iceland is due to its continued support from the Icelandic government. According to a 2025 country update, Iceland's installed geothermal power production capacity is 785 megawatts (MW), across nine power plants larger than 0.5 MW. Geothermal energy produces over a quarter of Iceland's total electricity.”

3. 3

   Horizontal well-assisted depressurization method for geothermal exploitation from fractured granite reservoir at Yangbajing geothermal field.

   Scientific reports (Zeng et al.)Published Feb 3, 2026Checked Oct 11, 2026

   “Assessment indicates that within a reservoir spanning depths of 950-1350 m and maintaining an average temperature of 248 °C, at a production pressure of 2.5 MPa, the production temperature remains stable at 230 °C with a steam saturation of 0.28 for 12.5 years, subsequently experiencing a decline. Over a lifespan of 20.6 years, the fundamental horizontal well system achieves an electric power of 32.28-23.12 MW, exhibits a reservoir impedance of 0.072-0.096 MPa/(kg/s), requires a pump power of 1.14-1.83 MW, and demonstrates an energy efficiency of 28.87-12.65, suggesting favorable geothermal exploitation performance under the modeled conditions. The estimated reduction in greenhouse gas emissions amounts to 1.63-5.63 Mt. Sensitivity analysis indicates that, for the geothermal exploitation by the depressurization method, the production pressure has a significant impact on geothermal exploitation performance. Enhancing the permeability of the reservoir can effectively decrease flow impedance, minimize internal energy consumption, and result in improved energy efficiency. Moreover, adjusting the injection flow rate within a specific range can enhance the system's energy efficiency.”

4. 4

   A structural optimization method for maximizing power output in multi-stage self-superheated systems.

   MethodsX (Pazuki et al.)Published Oct 10, 2025Checked Oct 11, 2026

   “The innovation lies in a generalized algorithm that iteratively evaluates different structural configurations, optimizing pressure distributions to identify the optimal system architecture for maximum power output. Application of the methodology yields a 4.96 % increase in power generation, accompanied by reductions in turbine outlet moisture content of 19.02 % and 17.38 %, thereby mitigating erosion risk and enhancing component lifespan. Furthermore, exergy destruction is reduced by 3.82 % and 0.85 %, reflecting improved energy utilization. The methodology's generalizability enables application across diverse thermal power systems requiring coordinated steam flow and pressure optimization, extending beyond geothermal applications to solar thermal, biomass, and hybrid renewable energy systems. Key methodological contributions are digested below:•Development of a systematic structural optimization framework using novel pseudocode for architecture determination•Introduction of coordinated multi-stage optimization balancing steam flow distribution between competing cycles•Creation of a generalized methodology applicable to diverse thermal power generation systems.”

5. 5

   Geothermal Energy Prospects in Khairpur District: Subsurface Analysis for Community-Level Electricity Generation.

   ACS omega (Soomro & Ansari)Published Jan 6, 2026Checked Oct 11, 2026

   “The results of this study reflected that the crystallographic phase is present in each sandstone rock sample, which makes it highly feasible for fluid and thermal flow. The PVT test revealed that water samples reached the isothermal compressibility of 379.072 1/psi × 106 with a density of 0.8503 g/cm3 at 130 °C. The thermal conductivity of oilfield water reached from 2.3 to 2.6 W/(m K) within 12 days, which is a positive sign of thermal conductivity escalation. Eventually, it is projected that 116,691.66 kWh/day of electricity can be produced by installing a small-scale geothermal power producing plant at the wellsite benefiting more than 46,676 people settled in the nearby vicinity of the geothermal well. Concludingly, this study supports the production of wellsite geothermal energy generation for community-level consumers settled in mobile locations of Khairpur Mirs District. The concept of using existing infrastructure of gas fields not only saves economic and logistic challenges but also resolves the surface handling problem of high-temperature fluid production at the wellhead.”