The cost-saving potential of next-generation particle technology CSP with steam cycles

Abstract

The cost-saving potential of next-generation concentrating solar power plants based on particle technology with steam cycles is assessed. Techno-economic models were created to optimize three systems with different steam cycles, ranging from state of the art to future development, for levelized cost of electricity and to compare them to a state-of-the-art molten salt tower system. Results show that the minimum levelized cost for a particle system is almost identical to that of a molten salt system (+0.1%), however larger solar multiples and storage capacities are preferred. Cost advantages for the receiver and storage subsystems are compensated for by increased costs for a multi-tower setup and the particle heat exchanger. The choice of the three investigated power cycles has only a marginal impact on the overall levelized cost (¡2.3%). Finally, several potential improvements to particle systems are identified which could lead to further cost reductions and an increase in electric yield.