Abstract: Mixed heliostat field combining, in the same field, heliostats of different sizes and/or with different types of facets, all of them having at least one facet and being canted or not, and either having spherical, cylindrical, flat or quasi-flat (spherical with a high curvature radius) facets, such that the solar field is optimised in order to minimise shadows and blockages between heliostats, as a result of correct positioning of the heliostats in the field.

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: Hybrid plant with a combined solar-gas cycle and operating method with two circuits, one air circuit and one steam circuit, the air circuit having a gas turbine with an intercooler with a natural gas supply, and the steam circuit having a steam turbine and storage systems. The steam circuit can have steam or salt solar receiver. Said plant can work more reliably by reducing the working temperature of the air in the receiver.

Abstract: Device for connection between adjacent solar receiver tubes of the type which are at the end of the solar receiver tube (1) to be joined with another adjacent solar collector tube, comprising: An expansion compensating element with at least two concentric bellows (7, 8) that are connected to each other and to a rigid ring (9) by means of a welded joint, which keeps them concentric in the expansion and compression process and joined to the glass tube (4) by the cover (12) and glass-metal transition element (21), A connection flange (5) to connect the solar receiver tube (1) to the one adjacent thereto, the flange (5) being a round metal plate with a hole that houses the absorber tube (3), Some through bolts (20) passing through the connection flange (5) to attach it with flange of the adjacent receiving tube (1).

Abstract: Mixed heliostat field combining, in the same field, heliostats of different sizes and/or with different types of facets, all of them having at least one facet and being canted or not, and either having spherical, cylindrical, flat or quasi-flat (spherical with a high curvature radius) facets, such that the solar field is optimised in order to minimise shadows and blockages between heliostats, as a result of correct positioning of the heliostats in the field.

Abstract: Manageable hybrid plant using photovoltaic and solar thermal technology and associated operating method, wherein said hybrid plant comprises three levels of generation: Level 1 (1) of photovoltaic generation (42) covering the self consumption of the plant; Level 2 (2) of generation of the solar thermal plant (44) and another part of photovoltaic generation (45) that covers the consumption of the auxiliary services of the solar thermal plant (43); Level 3 (3) of generation of another area of photovoltaic production (46) that improves the total production curve, the total power generated by the hybrid plant and discharged into the network (47), being the result of the sum of generation of the three levels. The photovoltaic modules of the invention are located in: in the north or south side of the tower not occupied by the cavity; the area surrounding the solar receivers of the tower; on covers or roofs of the plant at the rear of the heliostats; on land annexed to the tower plant.

Abstract: Concave receiver for a Stirling dish the main components of which are tubes (which form the surface on which the concentrated solar light beam falls), collectors (welded to the tubes and place the fluid that runs through the tubes in communication with the tanks), tanks (the internal areas of the collectors from which the working gas is distributed to each of the tubes) and cupolas (of which there are two types, that for housing the regenerator and the expansion cupola which is the area where the working gas is at a higher temperature) comprising a series of tubes (10, 11) extending from one collector (2), perpendicular thereto, to the other (2), also perpendicular thereto, and having a straight part (12) running from the inside of each collector (2) to the point where the tube starts to curve and a central part (13) in the shape of an arc of a circumference.

Abstract: A device for transformation of concentrated solar energy including a photovoltaic cell and laser device, which includes a first reflecting mirror adapted for entry of a beam of solar rays and a second reflecting mirror adapted for an outlet of a laser beam, with the first reflecting mirror reflective on an outlet wavelength of the laser beam and transparent to a totality of a solar spectrum and the second reflecting mirror partially reflective on the wavelength of the laser beam, reflective in an interval of the solar spectrum which is absorbed and transparent in other wavelengths different to these, and at the outlet of the laser beam. The device includes a nucleus doped with substances for total or partial absorption of the solar spectrum and coatings.

Abstract: A solar receiver having a higher yield than a central tower receiver. The receiver comprises a plurality of absorbent tubes for absorbing incident energy from light guides suitable for capturing solar radiation in solar collector concentration focal points, the absorbent tubes being arranged consecutively and in parallel, adjacently in relation to a direction transverse to the longitudinal axis of the absorbent tubes. The tubes contain a circulating heat-transfer fluid. The longitudinal axes are contained in at least two planes, defining at least two lines of absorbent tubes arranged in an alternating manner, and partially superimposed. The receiver also comprises containers subjected to a vacuum in order to enclose the absorbent tubes and reduce losses by convection.

Abstract: Working method for a system for partial mirroring of glass tubes and said system, made up by an tube supply facility, a chain where the mirroring is carried out in different fixed stations and a tube output facility, in which the main partial mirroring steps are the following: cleaning the glass tube sensitizing the surface washing optional activation or super-sensitization step washing plating washing drying in the case of external partial mirroring, the following steps are added: depositing the copper layer washing depositing anti-corrosion paint depositing mechanical and UV protective paint curing the paint external drying of the tube

Abstract: A solar plant enabling transformation of solar energy exploiting most of the solar spectrum with very efficient yields, including: at least one solar collector including a concentrator, configured to collect and concentrate solar radiation in the concentrator; a solar laser device to transform radiation received from the concentrators into laser radiation; a receiver and/or a solar reactor configured to receive radiation from the laser device and transform it into another form of energy; and can include flexible lightguides or plane mirrors to transport the radiation received from the laser device to the solar reactor and/or receiver, and photovoltaic cells interspersed among the collectors and laser devices to transform the concentrated radiation into electricity and allow radiation not transformed to pass to the laser devices.

Abstract: A device for transformation of concentrated solar energy including a photovoltaic cell and laser device, which includes a first reflecting mirror adapted for entry of a beam of solar rays and a second reflecting mirror adapted for an outlet of a laser beam, with the first reflecting mirror reflective on an outlet wavelength of the laser beam and transparent to a totality of a solar spectrum and the second reflecting mirror partially reflective on the wavelength of the laser beam, reflective in an interval of the solar spectrum which is absorbed and transparent in other wavelengths different to these, and at the outlet of the laser beam. The device includes a nucleus doped with substances for total or partial absorption of the solar spectrum and coatings.

Abstract: Manageable hybrid plant using photovoltaic and solar thermal technology and associated operating method, wherein said hybrid plant comprises three levels of generation: Level 1 (1) of photovoltaic generation (42) covering the self consumption of the plant; Level 2 (2) of generation of the solar thermal plant (44) and another part of photovoltaic generation (45) that covers the consumption of the auxiliary services of the solar thermal plant (43); Level 3 (3) of generation of another area of photovoltaic production (46) that improves the total production curve, the total power generated by the hybrid plant and discharged into the network (47), being the result of the sum of generation of the three levels. The photovoltaic modules of the invention are located in: in the north or south side of the tower not occupied by the cavity; the area surrounding the solar receivers of the tower; on covers or roofs of the plant at the rear of the heliostats; on land annexed to the tower plant.

Abstract: The invention relates to a solar collector having a multi-tube receiver, to thermosolar plants that use said collector and to a method for operating said plants, where the multi-tube receivers have a primary reflector (5) formed by two continuous symmetrical parametric curves, a secondary reconcentrator (6) and a receiver (1) that includes several connected tubes (7) with a circular cross-section, the center of gravity of the collector being located very close to the axis of rotation of the collector itself, and the concentration ratio C/Cmax being greater than 0.63, having 100% collection efficiency and having a maximum of two reflections of solar rays (8). The thermosolar plants that use said multi-tube receivers combine same with cylindrical or trough collectors with a tubular receiver and can be used for the direct generation of steam (with a saturation and overheating zone) or the indirect generation of steam (with the collectors connected in series).

Abstract: The invention relates to a novel arrangement of non-evaporable getters for a tube solar collector, said tube collector being of the type that includes an outer glass tube (2); an inner metal tube (3) through which a heat-transfer fluid flows; a vacuum chamber between both tubes; and, at the ends, non-evaporable getter pellets (1) that absorb gas molecules that could produce a loss of vacuum between the inner tube (3) and the outer tube (2) and the covers (8) at which a bellows-type expansion compensating device (4) is positioned. The inner metal tube (3) and outer glass tube (2) are positioned eccentrically to one another, forming a thicker area and a narrower area in the cover (8), said narrower area being used for the positioning, by means of bonding, of the non-evaporable getter pellets (1).

Abstract: Coil solar receiver for a Stirling disk, the main components of which are pipes (where the sun hits), collectors, tanks and cupolas (of which there are two types, one that houses the regenerator, and the expansion cupola that is the area where the working gas is at a higher temperature) that includes a series of pipes (1) that perpendicularly exit from one collector (2) and perpendicularly enter another (2) and where each pipe consists of two semicircumferential curved parts (10) and three straight parts (11) parallel to one another: a center straight part (between curve and curve) and two straight parts on the ends (between the curve and the exit of one collector (2)), the two straight end parts being located on the same plane, while the center straight part is located in a separate plane.

Abstract: Concave receiver for a Stirling dish the main components of which are tubes (which form the surface on which the concentrated solar light beam falls), collectors (welded to the tubes and place the fluid that runs through the tubes in communication with the tanks), tanks (the internal areas of the collectors from which the working gas is distributed to each of the tubes) and cupolas (of which there are two types, that for housing the regenerator and the expansion cupola which is the area where the working gas is at a higher temperature) comprising a series of tubes (10, 11) extending from one collector (2), perpendicular thereto, to the other (2), also perpendicular thereto, and having a straight part (12) running from the inside of each collector (2) to the point where the tube starts to curve and a central part (13) in the shape of an arc of a circumference.

Abstract: Parametric cylindrical solar collector with an optimized secondary reconcentrator and its design process, where the geometry of the primary reflector is an evolution of the Helmet collector concept towards a discontinuous curve that allows increasing the C/Cmax concentration to over 0.52 as well as reducing the wind loads. The structure is optimized to withstand the different loads to which the collector is exposed. The collector's center of gravity is brought closer to the axis of rotation of the collector. The geometry of the secondary reconcentrator is optimized and the collection efficiency of the collector is of 100%. The secondary reconcentrator is obtained partially mirroring the glass tube that keeps the vacuum in the absorber tube.