Innovative Heating Technology Boosts Winter Safety and Efficiency in Northern Sweden's Hydropower

Ice formation on dam gates during the harsh winters of northern Sweden has long posed costly safety and operational challenges for the hydropower industry. Lars Tarberg from Linnovation explained that frozen gates risk significant damages and personnel hazards. However, a breakthrough patented heating technology developed by Linnovation and tested in collaboration with Statkraft promises to change that.

The technology involves millimeter-thin heating panels installed directly on the surface of dam gates, capable of warming up to 60-90 degrees Celsius within minutes. This rapid heating melts ice efficiently, allowing previously frozen gates to become operational in under an hour, even at temperatures as low as minus thirty degrees Celsius. Staffan Lundmark from Statkraft discovered the potential of Linnovation’s technology—originally designed for wind power—during an innovation forum and subsequently trialed it on a gate that typically freezes shut with outstanding results.

The solution significantly improves winter operational safety by ensuring water release capability and reduces reliance on manual de-icing efforts. The project initially aimed to enhance safety but exceeded expectations, earning recognition as Statkraft’s innovation project of the year and prompting further installations. According to Tarberg, the collaboration demonstrates the vital role small companies like Linnovation play in large infrastructure projects when partnering with forward-thinking organizations like Statkraft. This cooperation has opened new business opportunities within Sweden's hydropower sector and abroad. The energy-efficient, environmentally friendly technology is optimized for Nordic conditions and can be integrated into existing systems, minimizing costly downtime and contributing to a more sustainable energy landscape in the region.