High energy-efficient device, system and method for the use of thermal energy of solar origin

A device adapted for accumulation and exchange of thermal energy of solar origin,

• which device is configured to receive a solar radiation concentrated by an optical system, which device comprises:
• a casing which defines an internal compartment and has an irradiation opening configured to allow entry of concentrated solar radiation, which irradiation opening puts in direct communication said inner compartment with external environment being devoid, in use, of closure or screen means;
• a bed of fluidizable solid particles, received within said inner compartment of said casing, which bed has an operative region directly exposed, in use, to the concentrated solar radiation that enters through said irradiation opening, in such a way that the particles of said operative region absorb thermal energy from solar radiation;
• and
• fluidization means of said bed of fluidizable solid particles, configured to adduce a fluidizing gas into said compartment at least at said operative region
• wherein said casing has an inclined upper surface arranged above a free surface of said bed of fluidizable solid particles and having a bottom margin at or in proximity of said irradiation opening, the configuration being such that said inclined surface is such as to promote a suction effect of the fluidization gas that emerges from the bed of fluidizable solid particles, wherein said irradiation opening is defined at said inclined upper surface.