TurboTime Podcast: Geothermal Power Generation with Turboden

In this episode of the TurboTime podcast, we talk about geothermal power generation with Joseph Bonafin, sales and business development manager at Turboden, a part of Mitsubishi Heavy Industries Group. We dive into the history of geothermal power, how it’s grown over the past 20 - 25 years, and how it fits into the decarbonization journey. We also look at what’s next for geothermal power generation.

Bonafin said there are several innovations in the pipeline for Turboden and geothermal power: “The integration of organic Rankine cycle (ORC) technology with other innovative geothermal technologies, such as enhanced geothermal systems (EGS), closed-loop geothermal systems, and lithium extraction from geothermal brine, can improve efficiency, sustainability, and economic viability.

“EGS generates electricity from hot dry rock locations, enhancing the heat exchange by circulating clean water through artificially engineered fractures. This efficiently converts moderate temperature into electricity, expanding the geographic applicability of ORC projects to previously inaccessible heat sources, especially for large-scale projects.

“Closed-loop geothermal systems provide environmentally friendly alternatives by creating a thermosyphon effect by drilling multiple lateral wells underground. Integrating ORC with closed-loop systems minimizes the environmental impact and reduces water consumption,” he continued.

“Lithium extraction from geothermal brine, crucial for electric batteries, is a sustainable source. ORC technology works as a cooler for the lithium extraction process in the shared infrastructure, contributing to a more economically viable and environmentally friendly process. Sale of electricity is added on top to the additional revenue stream coming from lithium extraction, promoting a cleaner and more profitable energy supply chain.

“In summary, the amalgamation of ORC technology with EGS, closed-loop systems, and lithium extraction from geothermal brine creates a holistic approach to geothermal energy production. This synergy enhances diverse resource utilization, promotes environmental sustainability, and contributes to the production of rare materials required for emerging technologies. This integrated approach underscores geothermal energy's potential in a sustainable and diversified global energy portfolio.”