Device, system and method for high level of energetic efficiency for the storage and use of thermal energy of solar origin

Abstract

A device (1; 10; 11; 12) for storage and transfer of thermal energy associated with an incident solar radiation, which is used in a solar plant for the production of energy, based on an optical plant configuration which makes solar radiation converge from above, and comprises: - a containment casing (2); and - a dual bed (31, 32) of fluidizable particles received inside the casing (2) and arranged the one circumscribed to the other one, wherein the casing (2) has at least one receiving cylindrical cavity (20) which extends through the bed (3) of particles and has a open top inlet (21) for receiving the solar radiation concentrated by a field of heliostats and an open or closed bottom (22) at the level of the base of the bed of particles, the overall arrangement being such that one of the beds of particles (31) is arranged in contact with the side skirt (23) of the cylindrical cavity (20) for storing thermal energy received from the solar radiation and the other one bed of particles (32) is arranged in contact with pipe bundles (41) crossed by the working fluid.

Description

technical field [0001] The present invention relates to plants for the production of energy based on the use and storage of solar energy, and to related methods and devices suitable for use in such plants for the storage and transfer of thermal energy of solar origin. Background technique [0002] Concentration of solar energy using heliostats is known in the art. It is also known that it is possible to store heat not used immediately by means of devices based on a bed of fluidized particles exposed to solar radiation concentrated by heliostats. [0003] Typically, the means for storing thermal energy of solar origin and / or the means for corresponding heat exchange are located at an elevated position relative to the mounting plane of the field of heliostats so as to receive the concentrated thermal energy from below. solar radiation. Thus typical configurations provide storage or switching devices placed on a tower structure in which so-called "service" components can find...

AI Technical Summary

Problems solved by technology

[0005] A further critical point that arises from known plant configurations is linked to the presence of equipment operating at high temperatures, made of expensive and costly materials, with attendant overall Reduced factory efficiency

[0006] The known plant configuration just described presents a significant deficiency, which is also linked to the difficulty and cost of maintenance operations at heights, especially the need for larger hoisting mechanisms

[0007] Furthermore, in the case of a device with a bed of fluidizable particles, accidental rupture of the device itself can lead to leakage of hot material and fall due to gravity, and endanger persons and objects

[0008] Due to the results just noted, the known devices for storing and transferring thermal energy of solar origin allow the generation of electricity to remain costly and in any case far from the so-called "parity grid"

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