Abstract:
Spectrophotometer for the characterization of receivers of solar collectors in order to determine optical properties (transmittance and reflectance). The equipment allows the evaluation of a receiver tube in real time and in any kind of light conditions, both inside and outside. The equipment also allows the detection of the eccentricity between the outer tube and the inner tube, which directly influences the reliability of the measurement. The equipment has a mechanical system for allowing a rotation of the equipment around the tube in order to find the optimum measurement position and attach itself to the tube.
Abstract:
Selective solar absorbent coating and manufacturing method, with solar absorption and low emissivity properties. The coating comprises a substrate (1) of metal, dielectric or ceramic material, at least one highly reflective metal layer (2) in mid-far infrared applied to the substrate itself which provides low emissivity properties, a mufti-layer structure of alternating dielectric and metallic layers (3) of subnanometric thickness applied to the reflective metal layer and at least one dielectric layer (4) that acts as an anti-reflective layer for the solar spectrum. The coating is applicable as a selective absorbent coating in absorbent tubes for parabolic-trough solar collectors, in solar panels for hot water, heating or domestic cooling, both in the form of absorbent tubes and absorbent sheets, in capture systems in tower solar thermoelectric power plants, and in capture systems in Stirling disk systems.
Abstract:
Hybrid system of parametric solar thermal cylinder (14) and photovoltaic receiver (3), which comprises a thermal absorber receiver (2) through which a heat-carrier fluid circulates, and, additionally at least one spectral separation filter (4), situated between the photovoltaic receiver (3) and the thermal absorber receiver (2), which receives the light reflected from the primary mirror (1) of the parametric cylinder (14) and which permits the selective separation of the solar spectrum, directing a part thereof towards the photovoltaic receiver (3) and the remainder towards the thermal absorber receiver.
Abstract:
The invention relates to a sol-gel method for producing an anti-reflective coating from alcoxide-type precursors, that can subsequently be applied to glass or plastic substrates by spraying. The invention also relates to optical and thermoelectrical devices that have been coated with said anti-reflective material. This coating increases the transmittance of the transparent substrates over which it is applied, as a result of which it is useful to apply over high concentration solar modules (HCPV), for both primary lenses and secondary lenses, in conventional silicon or in CSP tubes.
Abstract:
It is lighter and easier to assemble. It comprises a) an anchoring sub-structure (10) for anchoring to the ground; b) a tracking sub-structure (20), mounted on the anchoring sub-structure (10) and such that it can rotate about an azimuth axis; c) a driving sub-structure (30) comprising two coaxial hoops (31) formed by a plurality of assembled stamped segments (33), said hoops (31) being joined by tie-rods (32); the driving sub-structure (30) being capable of elevation rotation in relation to the tracking sub-structure (20); d) a supporting sub-structure (50), in the form of a cradle, designed to support a reflective surface; and e) a modular connection sub-structure (40), manufactured with stamped elements, whereon the supporting sub-structure (50) is mounted, and fixed on the inside of the driving sub-structure (30).
Abstract:
The invention presents an evaporation source for transporting chemical precursors to a substrate on which the latter are deposited by means of condensation, formed by a principal tube (1) which houses the precursors in its lower part, and which has heating means (8). An inlet (5) and an outlet (6) for carrier gases is arranged in the upper part of the principal tube (1), said inlet (5) and outlet (6) being located on the lateral surface (7) of the principal tube (1), opposing each other and aligned along a common line which passes transversally through the lateral surface (7) of the principal tube (1).The invention also presents a method of evaporation for transporting chemical precursors in which introducing and extracting the carrier gases from the principal tube (1) is carried out in alignment in a direction transversal to the lateral surface (7) of the latter.
Abstract:
Selective solar absorbent coating and manufacturing method, with solar absorption and low emissivity properties. The coating comprises a substrate (1) of metal, dielectric or ceramic material, at least one highly reflective metal layer (2) in mid-far infrared applied to the substrate itself which provides low emissivity properties, a mufti-layer structure of alternating dielectric and metallic layers (3) of subnanometric thickness applied to the reflective metal layer and at least one dielectric layer (4) that acts as an anti-reflective layer for the solar spectrum. The coating is applicable as a selective absorbent coating in absorbent tubes for parabolic-trough solar collectors, in solar panels for hot water, heating or domestic cooling, both in the form of absorbent tubes and absorbent sheets, in capture systems in tower solar thermoelectric power plants, and in capture systems in Stirling disk systems.
Abstract:
Method of operating a solar thermoelectric power plant that allows operation of high-, medium- and low-pressure superheating turbines with both superheated steam and saturated steam. The plant includes energy storage in high-pressure liquid tanks. The method described allows the direct introduction of saturated steam into a superheated steam turbine. This steam may receive an intermediate reheating between the high-pressure turbine and the low- and medium-pressure turbines to achieve conditions of superheated steam. The mode of operation proposed in the invention facilitates the operation of the plant in periods without sunshine (during transient periods, such as passing clouds or night time) or during discharge of accumulators (saturated liquid tanks at high-pressure).
Abstract:
Solar tracker with azimuthal rotation mechanism arranged on the upper extremity of the pedestal (1), comprising a fixed base (10), a hollow bearing cap (3) to support the supporting structure on the fixed base (10), a rotating mechanical element (17) arranged between the bearing cap (3) and the fixed base (10) and two hydraulic cylinders (6, 6′), arranged at different heights in relation to the vertical axis of the bearing cap (3) and, fixed at one end to the bearing cap (3) and at the other end connected by the same fixed axle (7), which is attached to the fixed base (10) in such a way that, when the pistons of the cylinders (6, 6′) begin to move, they cause the bearing cap (3) to which the cylinders (6, 6′) are attached, to rotate, thereby rotating the cylinders (6, 6′) relative to the same axle (7), which is fixed to the base (10).
Abstract:
The invention relates to a panel-based solar receiver for a thermal solar tower power plant (4), which comprises: a front panel (8), the external surface of which receives solar radiation (2) from the field of heliostats (3), a back panel (9), sealing elements (10) between the panels (8, 9), arranged at the lateral ends of both, an intake collector (5), located in the upper part of the panels (8, 9), where the heat transfer fluid enters the receiver (1) and an evacuation collector (6), located in the lower part of the panels (8, 9), where the heat transfer fluid leaves the receiver (1); wherein the front panel (8), back panel (9) and the two sealing elements (10) form the receiver body (16), which constitutes a passage for the heat transfer fluid (7) to travel through. Each solar tower can contain one or several panel-based receivers (1) and be arranged in series or in parallel, with the same or a different fluid (7) circulating there through.