Startup to test closed-loop geothermal drilling to tap Earth’s heat

Rodatherm Energy Corporation, a Canadian geothermal startup based in Alberta, has secured a $38 million Series A investment from TDK Ventures to develop and deploy its innovative closed-loop geothermal system (AGS). Unlike traditional geothermal plants that require drilling into hot rock and use water or steam, Rodatherm’s AGS technology operates without drilling, water use, or emissions. The system uses a fully sealed, pressurized loop optimized for sedimentary basins, harvesting heat through conduction and convection into a new working fluid isolated from the ground. This design eliminates environmental risks such as contamination and fracking, while achieving 50% higher efficiency than conventional binary-cycle geothermal systems and using five times less fluid. The AGS system acts like a large underground heat pump and is modular, scalable, and capable of providing reliable baseload and dispatchable power. It is engineered to operate in diverse geological settings with minimal maintenance over decades and has a small surface footprint without requiring fresh water. Rodatherm plans to build its first