Volts What's the deal with pumped-hydro energy storage?
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Jan 22, 2025 Erik Steimle, Chief Development Officer at Rye Development, shares his insights into closed-loop pumped-hydro energy storage systems. He explains how these innovative projects use artificial reservoirs to provide long-duration storage without harming natural waterways. The discussion highlights the economic potential, longevity, and efficiency of pumped-hydro compared to lithium-ion batteries. Steimle also addresses regulatory challenges, community engagement, and recent bipartisan support aiming to streamline permitting for these crucial renewable energy initiatives.
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Pumped Storage Capacity
- Pumped storage has provided energy storage in the U.S. since the 1920s, with 43 projects and 23 GW in operation.
- A small project in California was added 15 years ago, but the last major project was built over 30 years ago.
Pumped Hydro History
- Pumped hydro storage has been around since the 1920s, accounting for over 90% of the U.S.'s utility-scale storage.
- The last major pumped hydro project was built over 30 years ago, with renewed interest emerging due to grid changes.
Closed-Loop Pumped Hydro
- Closed-loop pumped hydro is a new technology in the U.S. using two artificial reservoirs.
- This setup is more environmentally sustainable and offers greater flexibility in project location.