Pumped Thermal Energy Storage Using Low-Cost Particles and a Fluid Bed Heat Exchanger for Maximum Power Efficiency

Summary

The document addresses the critical need for robust, efficient, and cost-effective long-duration electricity storage (LDES) solutions to enhance grid resiliency and integrate variable renewable energy sources. The National Laboratory of the Rockies developed the PUMP system, a transformative LDES technology using low-cost particles and a fluid bed heat exchanger, integrated with concentrating solar thermal power. The project successfully demonstrated prototype PFB HX operation with high heat transfer effectiveness and implemented particle TES for cold storage, indicating a completed and promising development phase.

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