The ability of thermal energy storage (TES) to avoid the major intermittency issues associated with solar photovoltaic power generation is a key differentiator for concentrating solar power (CSP) systems. Infinia Corporation is a pioneer in phase change salt TES systems, with one DOE contract based on heat pipes [1], and a second DOE contract that uses an inherently simpler, patented sodium pool boiler that is integral with the TES salt. This paper describes the Phase 1 results for that second contract, which is targeted for cost effective extended duration storage for CSP systems up to a level that can provide baseload power, with a particular focus on dish Stirling systems.

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