Assessment of thermal energy storage options in a sodium-based CSP plant

摘要: Abstract Sodium has proven to be an efficient heat transport fluid in a central receiver system the IEA-SSPS facility Almeria 1980s with 5 MWh th direct two tank storage system. In recent years interest liquid metals, particularly sodium, as transfer fluids for concentrating solar power reawakened. However, assessment of thermal energy options metal-based not been performed yet. this paper sensible, latent and thermochemical systems, described literature potentially suitable plant using are investigated. As sensible sodium one thermocline systems filler considered, well indirect molten salt systems. Latent include configurations finned tubes, packed beds phase change material capsules active screw type addition, metal hydride dehydrogenation, ammonia dissociation hydroxide dehydration considered The presented discussed compared on basis following criteria: Storage medium cost, density, cycling behaviour, maturity level suitability fluid. result, represents promising option. It could further enhanced by cascaded arrangement capsules. Moreover, based or identified best options.