New Scheme | Certificate of Merit

New Scheme - category reflecting the ambition and aspiration of a new District Energy system and those organisations that have an exciting vision, and which have achieved a high level of energy efficiency through a District Energy system.

Polar Night Energy’s Sand Battery for Loviisan Lämpö | Pornainen, Finland

Solution for clean energy’s big problem. Polar Night Energy has built an industrial-scale Sand Battery for Loviisan Lämpö, a Finnish energy company. Located in Pornainen, Finland, the 1 MW thermal energy storage serves as the primary production plant of the local heating network. The purpose of the Sand Battery is to reduce carbon dioxide emissions of the district heating production in the Pornainen municipality and introduce a new flexible heat production technology. The heating power of the Sand Battery is 1 MW, and it can store up to 100 MWh of thermal energy, making it about ten times larger than the Sand Battery in operation in Kankaanpää since 2022. This is a significant step in scaling up the Sand Battery technology. The Sand Battery in Pornainen is filled with crushed soapstone, a by-product of Tulikivi’s heat-retaining fireplace production. It’s a great example of the circular economy in action.

Visit the project's website here.

Download the project's brochure here.

Case study - Polar Night Energy’s Sand Battery for Loviisan Lämpö | Pornainen, Finland