Recent advancements in reducing the operational costs of pumped hydro storage (PHS) are primarily focused on innovative construction methods and technologies that aim to enhance efficiency and reduce costs:
- Modern Tunnel-Boring Machines (TBMs): The use of TBMs for underground PSH facilities can significantly reduce construction costs and time by up to 50%. This method involves excavating channels between natural aquifers, allowing PSH facilities to be built in areas without traditional elevation differences.
- Modular Steel Dams: Another approach involves constructing reservoirs using modular steel dams. This off-site, standardized construction can reduce overall costs by one-third and halve construction time.
- Closed-Loop Scalable Systems: Modular closed-loop systems use standardized components like penstocks and water bladders, allowing for faster and more cost-effective construction without reliance on natural water sources. These systems may enable smaller-scale projects.
- Efficiency Improvements: Traditional PSH systems have seen efficiency improvements over the years, now often achieving round-trip efficiencies of 75-80% due to advancements in reversible pump-turbines and control systems.
While these innovations aim to reduce costs and enhance feasibility, they also address long-standing geographical challenges, making PHS more viable in diverse landscapes. These advancements are crucial as the demand for long-duration energy storage increases with wider integration of renewable energy sources.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/are-there-any-recent-advancements-in-reducing-the-operational-costs-of-pumped-hydro-storage/
