ALPHAXIOMS Geothermal News & Energy Research

Hyundai E&C Breaks Record: Building the World’s Largest Single-Unit Geothermal Power Plant in Indonesia By:  Robert Buluma In a remarkable feat of engineering, Hyundai Engineering & Construction ( Hyundai E&C) has just completed the Sarulla Geothermal Power Plant (Sarulla GPP) in North Sumatra, Indonesia now officially recognized as the world’s largest single-unit geothermal power plant with a capacity of 330 MW. This milestone not only showcases Korean engineering excellence on the global stage but also marks a significant step forward for clean, reliable renewable energy in Southeast Asia. A Giant Leap for Geothermal Energy Located in the Sarulla region of North Sumatra, the plant consists of three units that together deliver 330 megawatts of clean electricity enough to power approximately 2.1 million Indonesian households. What makes Sarulla truly special is its single-unit design. While many geothermal projects around the world are built in smaller, modular phases...

Exergy’s  Gemini Turbine: Redefining the Future of Large-Scale Geothermal Power By:  Robert Buluma In a bold leap forward for geothermal innovation, Exergy International has once again raised the bar with the unveiling of its groundbreaking Gemini Turbine — a next-generation powerhouse that delivers up to 60 MWe on a single shaft . Announced in Olgiate Olona, Italy , the Gemini marks a monumental evolution in Exergy’s proprietary Radial Outflow Turbine (ROT) technology, setting a new benchmark for efficiency, scalability, and cost-effectiveness in large-scale geothermal power generation . The Dual-Engine Revolution At the core of Gemini’s innovation is a reimagined turbine architecture that merges two turbines into one high-capacity unit . Its dual-inlet design allows working fluid to enter symmetrically from both sides, expanding radially outward through a central rotor disk equipped with mirrored rotor stages. This unique configuration achieves unmatched mechanical b...