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Public post
Hannes Reuter
Sep 2026 • linkedin
Public post
Sep 2026 • linkedin
This week I had the privilege of visiting the Hyvinkää Pit Thermal Energy Storage (PTES) project in Finland together with Sanna Kytömäki, CEO of HLV, and colleagues from Ramboll. What makes this project remarkable is not simply its size. It is what it represents. As the world's largest pit thermal energy storage facility, Hyvinkää will be able to store up to 18,000 MWh of heat in a single charge cycle and approximately 90,000-100,000 MWh annually. The facility is designed to capture renewable and low-cost energy w…
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