Fluidized Bed Technology for Concentrating Solar Power With Thermal Energy Storage

Abstract

A generalized modeling method is introduced and used to evaluate thermal energy storage (TES) performance. The method describes TES performance metrics in terms of three efficiencies: firstlaw efficiency, secondlaw efficiency, and storage effectiveness. By capturing all efficiencies in a systematic way, various TES technologies can be compared on an equal footing before more detailed simulations of the components and concentrating solar power (CSP) system are performed. The generalized performance metrics are applied to the particleTES concept in a novel CSP thermal system design. The CSP thermal system has an integrated particle receiver and fluidizedbed heat exchanger, which uses gas/solid twophase flow as the heattransfer fluid, and solid particles as the heat carrier and storage medium. The TES method can potentially achieve high temperatures (>800 آ°C) and high thermal efficiency economically.