This paper proposes an innovative hybrid CSP – Compressed Air Energy Storage (CAES) combined cycle power plant configuration that provides very competitive electricity storage technology with long lifetime, which is highly competitive with respect to battery electric storage (BES). The concept initiates a new era of adaptive renewable power plants for optimum power grid management, enabling higher shares of renewables. Due to the fact that cheap off-peak electricity is used to provide the air compression work of the topping Brayton cycle, the overall peak solar-to-electric energy conversion efficiency of the proposed power plant may reach 40%, which roughly doubles the peak efficiency with respect to state-of-the-art CSP technology.
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