DEVICE FOR THE STORAGE OF THERMAL ENERGY OF SOLAR ORIGIN BASED ON MULTIPLE REFLECTIONS
Patent Information
- Application Number
- MX2022009456
- Authority / Receiving Office
- MX · MX
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2022-08-01
- Publication Date
- 2026-02-25
- Estimated Expiration
- 2040-02-03
Smart Images
Figure MX431696B0
Abstract
Claims
1. A device (1) for the storage and transfer of solar thermal energy, this device (1) comprises: - a containment cover (2), having an irradiation orifice (10) configured to allow the entry of incident solar radiation into an irradiation region (350) defined within the cover (2); - a bed (3) of fluidizable particles received within the cover (2); - at least one reflectance and / or re-radiation surface (701; 702; 703) positioned within the irradiation region (350) and configured to reflect the solar radiation entering through the irradiation orifice (10) directly onto a freeboard (35) of the particle bed (3) or onto another reflectance and / or re-radiation surface of the irradiation region (350).
2. The device (1) according to claim 1, further comprising the heat exchange medium (5), thermally connected to the particle bed (3) and capable of being activated to receive thermal energy from it, the overall configuration being such that thermal energy is transferred from the incoming solar radiation to the particles in the bed (3) and, at the same or later time, from the particles to the heat exchange medium (5).
3. The device (1) according to claim 1 or 2, comprising the means for supplying a heated fluidizing gas exiting the particle bed (3) to a user.
4. The device (1) according to any of the preceding claims, wherein the irradiation hole (10) puts the irradiation region (350) of the cover (2) into direct communication with the external environment, being devoid, in use, of the closing or shielding means.
5. The device (1) according to any of the preceding claims, wherein the irradiation hole (10) is placed in a side wall or skirt (22) of the cover (2), preferably near an upper wall (21) of the cover.
6. The device (1) according to any of the preceding claims, wherein the freeboard (35) of the particle bed (3) is placed below a lower margin (230) of the irradiation orifice (10), also under a fluidization condition.
7. The device (1) according to any of the preceding claims, comprising a plurality of reflecting surfaces (701; 702; 703) positioned within the irradiation region (350) and each configured to reflect solar radiation entering through the irradiation hole (10), the overall configuration being such that the incoming radiation strikes the free edge (35) of the particle bed (3) downwards from multiple reflections on the reflecting surfaces (701; 702; 703).
8. The device (1) according to any of the preceding claims, wherein the reflecting and / or re-radiating surfaces (701; 702; 703) are configured to re-radiate, within the irradiation region (350), the thermal energy absorbed by solar radiation, advantageously in accordance with a radiant cavity configuration. QCfrRnn / zznz / E / YiAi 9. The device (1) according to any of the preceding claims, wherein the or each reflecting and / or new radiation surface (701; 702; 703) is implemented in an inclined wall housed within the irradiation region (350) or is associated with a wall (21,22) defining the cover (2), advantageously, with mutual view factors suitable for reducing the radiant energy exiting the orifice (10).
10. The device (1) according to any of the preceding claims, wherein the or each reflecting and / or new radiation surface (701; 702; 703) has a reflectivity belonging to one of the following schemes: specular reflectivity, with the radiation reflection angle equal to the incidence angle; diffuse reflectivity, with reflection in all directions, independently, from the radiation incidence plane; bright reflectivity, with hybrid behavior between specular and diffuse reflectivity.
11. The device (1) according to any of the preceding claims, wherein the cover (2), except for the irradiation hole (10), is made of thermally insulating materials.
12. The device (1) according to any of the preceding claims, wherein the cover (2) is made of materials resistant to high temperatures and by means of heat recovery and / or loss systems.
13. The device (1) according to any of the preceding claims, wherein the bed particles (3) have a higher absorbance than the reflecting surfaces (701; 702; 703).
14. The device (1) according to any of the preceding claims, wherein the heat exchange medium comprises one or more of the following components: thermoelectric elements; thermionic elements; thermophotovoltaic elements; bundles of tubes (5) configured to cross, in use, through an operating fluid.
15. The device (1) according to any of the preceding claims, comprising the fluidizing medium (4) configured to allow the entry of a fluidizing gas, preferably air, into the bed (3) of fluidizable solid particles.
16. The device (1) according to the preceding claim, comprising the means for selectively varying the speed and / or flow rate of the fluidizing gas.
17. The device (1) according to any of the preceding claims, comprising the suction means (6), in particular with a substantially cap-type configuration (61), configured to draw a fluidizing gas above the freeboard (35) of the particle bed (3).
18. The device (1) according to claims 15 and 17, comprising the heat exchange medium (512) between a fluidizing gas leaving the particle bed (3) and a fluidizing gas entering the particle bed (3).
19. The device (1) according to any of the preceding claims, comprising the heating medium thermally connected to the particle bed (3), this heating medium being configured to transmit thermal energy to the particles.
20. The device (1) according to any of the preceding claims, comprising a support structure (800) configured to hold the cover (2) in elevation above the floor.
21. A power plant for the production of electrical and / or thermal energy, comprising: one or more devices (1) according to any of the preceding claims, placed at a high altitude; and the means for collecting solar radiation (500), placed on the ground and preferably comprising a plurality of heliostats (501), the configuration being such that the solar radiation is collected by the collecting means (500) and concentrated at the irradiation orifice (10) of one or more devices (1), wherein preferably the collecting means (500), or a subgroup thereof, concentrates the solar radiation at a common focus (F) placed at or near the irradiation orifice (10) of a device (1).
22. The plant according to the preceding claim, wherein the collection means (500) defines a radiation configuration that causes solar radiation to converge from the bottom onto one or more of the devices (1).
23. A method for producing electrical and / or thermal energy starting from the thermal energy of solar radiation, the method providing: - a concentration of solar radiation in an irradiation orifice (10) of a receiving device (1) comprising a bed for the storage of thermal energy of the type with fluidizable particles (3), and - a single or multiple reflection of the solar radiation in the particle bed by means of one or more reflecting and / or new radiation surfaces (701-703) positioned down the inlet orifice (10).
24. The method according to the preceding claim, comprising a thermal energy transfer phase by means of the bed particles (3), which can be activated, selectively, at the same or later time with respect to a thermal energy storage phase.
25. The method according to claim 21 or 22, comprising a step of utilizing a heated fluidizing gas exiting the particle bed (3).
26. The method according to any of claims 21-23, comprising a fluidization phase of the bed particles (3), which is activated under selected operating conditions.
27. The method according to the preceding claim, which provides selective adjustment of the speed and / or flow rate of a fluidizing gas.
28. The method according to any of claims 21-25, using a device or plant according to any of claims 1-20.