Yonathan Hutagalung

From High Temperatures to New Horizons

Yonathan "Hary" Hutagalung, a geologist from Indonesia, is charting a global path in sustainable energy through his MSc in Sustainable Energy at the Iceland School of Energy (ISE). With a BSc in Geology from the University of Canterbury in Christchurch, New Zealand, Hary’s initial focus was on high-temperature geothermal systems. However, his journey at ISE led him to expand his expertise by exploring the untapped potential of low-temperature geothermal systems.

Immersive Learning in Slovenia

Hary’s curiosity and passion for geothermal energy took him to the second International Summer School on Thermogeology in Ljubljana, Slovenia, held in July 2023. Organized by the Geological Survey of Slovenia and the Department of Geology at NTF-UL, the program provided a deep dive into low-temperature geothermal systems, supported by the EEA project INFO-GEOTHERMAL and COST Geothermal DHC.

The intensive program combined lectures, site visits, and fieldwork. Hary gained hands-on knowledge about technologies for shallow geothermal energy utilization, optimizing plant operations, and sustainable practices. A highlight of the experience was visiting the Si-Geo-Electricity power plant, where a former gas well was converted into a geothermal facility producing 400 MWe annually using an adapted Kalina cycle.

Cultural Exchange and Professional Growth

Beyond academics, the summer school offered a rich cultural experience, immersing Hary in Slovenia’s traditions and customs. Interacting with experts and students from diverse backgrounds, he gained fresh perspectives and deepened his understanding of thermogeology.

For Hary, the program underscored the importance of low-temperature geothermal systems, often overshadowed by high-temperature resources in regions like Indonesia and New Zealand. It was a pivotal experience that broadened his view of geothermal energy’s role in sustainable development.

Inspiring a Sustainable Future

Hary’s journey at ISE reflects the unique opportunities the program offers to its students. His experiences—from studying high-temperature systems in Iceland to exploring low-temperature resources in Slovenia—demonstrate the power of curiosity and continuous learning in shaping innovative solutions for a sustainable future.

Now, more motivated than ever, Hary is focused on applying his expanded knowledge to contribute to the sustainable energy sector. His story is a testament to how ISE bridges the gap between classroom learning and real-world applications, inspiring students to become global leaders in energy innovation.