14 results about "Solar absorber" patented technology

This invention provides a heat exchange unit and a compact solar absorber based on jet design, relating to the field of solar absorber technology. The jet-based heat exchange unit includes: a hot sidewall and a non-hot sidewall arranged opposite each other, with multiple horizontal medium channels formed between them. Adjacent medium channels are spaced apart. The non-hot sidewall includes multiple continuously arranged sub-non-hot sidewalls, each sub-non-hot sidewall corresponding to one medium channel. Each sub-non-hot sidewall has multiple medium inlets and medium outlets, spaced apart. The medium inlets are used to jet cold medium toward the hot sidewall. The solution provided by this invention can reduce pressure drop losses in the channels and improve heat exchange performance.

The present invention relates to a smart heating and cooling device capable of selectively implementing solar heating and radiant cooling, and a manufacturing method therefor. The smart heating and cooling device according to one embodiment of the present invention comprises: a flexible substrate; a bottom layer which is disposed on the flexible substrate and which has a radiant cooling body; and a top layer which is disposed on the flexible substrate, and which has a band partially fixed to the flexible substrate so as to be bent and deformed according to the deformation of the flexible substrate, and a solar absorber connected to the band so as to be movable according to the deformation of the band, wherein the solar absorber moves according to the deformation of the flexible substrate so as to selectively cover the radiant cooling body.

This invention relates to the field of metal micro / nano optical device technology, and more particularly to a high-absorption ultra-wideband solar energy absorber, comprising several sets of nanocomposite structures, a titanium thin film, a one-dimensional PMMA grating structure, and a titanium substrate. The nanocomposite structures, titanium thin film, one-dimensional PMMA grating structure, and titanium substrate are arranged sequentially from top to bottom. By combining nanodisc structures and nanoelliptical disk structures, local surface plasmon resonance modes can be excited, thereby improving absorption in the short wavelength range. In addition, by introducing a one-dimensional PMMA grating structure, new and stronger local surface plasmon resonance modes can be excited at the one-dimensional PMMA grating structure, thereby improving absorption in the long wavelength range and achieving the effect of broadening the bandwidth.

This utility model discloses a solar-powered hot air assisted heating system and a pressurized building. The system includes a solar collector, a return air mechanism, and an air supply mechanism. The solar collector heats air using solar energy and includes an outdoor, sealed collector chamber with a solar absorber plate on its sun-facing side. The return air mechanism supplies return air from the pressurized building to the collector chamber and includes a return air duct connected to both ends of the collector chamber and the pressurized building, with a return air valve on the duct. The air supply mechanism supplies hot air heated by the collector chamber to the pressurized building or circulates indoor air. It includes an air supply duct and a circulation duct. The air supply duct is connected to both ends of the collector chamber and the middle of the circulation duct, while both ends of the circulation duct are connected to the pressurized building. The air supply duct has an air supply valve, and the circulation duct has a circulation valve upstream and a blower and an electric heating element downstream. This system can utilize solar energy to provide hot air for auxiliary heating and achieve indoor air circulation.

The application discloses a kind of super material broadband solar absorber, belong to super material optical device technical field.The absorber adopts whole refractory material system, only by chromium (Cr) and silicon dioxide (SiO2) is formed, overall is periodic inverted hollow right square prism structure, system is divided into upper and lower two parts: the upper half is the periodic cyclic structure of SiO2 and Cr composition;Lower half is SiO2 dielectric layer and Cr reflection layer;From top to bottom, it presents the periodic hollow inverted right square prism structure.The application realizes 97.26% average absorption rate in 250-2500nm wavelength range, energy absorption rate is as high as 97.96% under AM1.5 standard solar irradiation condition, while the absorber has excellent polarization insensitive characteristics, simple structure, excellent thermal stability, can be widely used in solar energy collection, optical stealth and other fields.

Abstract This application relates to inventive concentrated solar power systems using solar receivers. The solar receiver comprises a fluid chamber configured for operating at pressures up to 2 atmospheres, and characterised by a solar absorber housed within the fluid chamber, and a plurality of transparent elongated panels that define a segmented wall of the fluid chamber, wherein concentrated solar radiation received through an opening passes through the segmented wall and into the fluid chamber and impinges upon the solar absorber. solar absorber.

This invention discloses a broadband high-absorption solar absorber based on a hollow cross-ring structure. The absorber is composed of a periodic array of hollow cross-ring structural units. Each unit, from top to bottom, includes a metallic iron (Fe) resonator layer, a silicon dioxide (SiO₂) dielectric layer, a gallium arsenide (GaAs) layer, and a metallic Fe reflective layer. The metallic iron resonator employs a hollow cross-ring structure design. Through optimized structural design, material selection, and key parameter matching, this invention achieves highly efficient light energy capture over a wide spectral range: an average absorptivity of 98.47% in the 498-1988 nm wavelength range, a continuous bandwidth exceeding 90% at 1490 nm, and a weighted absorption efficiency of 97.96% under the AM1.5 standard solar spectrum, with an energy loss rate of only 2.04%. The excellent absorption performance of this absorber stems from the surface plasmon resonance, gap plasmon resonance, and synergistic coupling effect between the unit structures excited by the hollow cross-ring structure. Meanwhile, the overall structure is only 243 nanometers thick, exhibiting ultra-thin characteristics, high stability, and good fabrication tolerance. This invention can be widely applied in fields of high-efficiency solar energy utilization such as photovoltaic power generation and photothermal conversion, providing new ideas for the development of next-generation high-efficiency solar energy devices and possessing significant engineering application value.

A solar radiation receiver having a receiver chamber having at least one radiation opening through which concentrated solar radiation can be introduced into the receiver chamber, having at least one solar absorber device which has at least one solid medium block which is fastened to a transport device, and having at least one opening through which the at least one solar absorber device is inserted such that the at least one solid medium block is arranged in the receiver, and through which the solar absorber device is removed.

The present invention relates to a solar thermal energy accumulator and converter, comprising at least one hollow vessel (11), filled with a phase-change material (12), forming hollow cylindrical cavities (13) around a hollow rectangular cavity (15), a solar absorber (14) arranged in a fixed position and inserted into a cylindrical cavity (13), and a thermophotovoltaic generator (16) which is inserted into the rectangular cavity (15). The vessel (11), the thermophotovoltaic generator (16) and the fixed solar absorber (14) are aligned along a horizontal axis of the accumulator and converter. If the thermophotovoltaic generator (16) moves vertically away from the vessel (11) and the fixed solar absorber (14), the solar absorber (14) transfers thermal energy to the vessel (11); if the vessel (11) moves vertically such as to be aligned with the position reached by the thermophotovoltaic generator (16), the vessel (11) transfers energy to the thermophotovoltaic generator (16); and if the thermophotovoltaic generator (16) moves away from the position reached by the vessel (11), the exchange of thermal energy between the solar absorber (14), the thermophotovoltaic generator (16) and the vessel (11) is prevented, with thermal energy being stored in the vessel (11).

The invention discloses an ultra-wideband efficient solar absorber in the fields of optics, material science and energy, which comprises a Ti substrate, the height of the Ti substrate is h1, a SiO2 layer is arranged on the Ti substrate, the side length of the SiO2 layer is consistent with an array period P, the height of the SiO2 layer is h2, a rotating Ti layer is arranged above the SiO2 layer, the height of the Ti layer is h3, a concentric Ni ring is arranged above the Ti layer, the inner ring radius of the concentric Ni ring is r1, and the inner ring radius of the concentric Ni ring is r2. And the radius of the outer ring is r2. Within the wave band range of 200 nm to 3000 nm, the average absorptivity with the theoretical value being 98% is achieved, and the absorptivity can be 99% at the position of 907 nm. Compared with a traditional absorber, the absorber has the advantages of being wide in frequency band, high in absorption, relatively simple in structure, easy to manufacture and low in cost. The invention provides possibility for preparation of the absorber, and has wide application prospects in the fields of solar energy collection, stealth and heat emitters.

A solar absorber disclosed by the present invention comprises a plurality of absorber units arranged in a periodic array, each absorber unit comprises a substrate layer, a dielectric layer, an ultrathin film layer and at least one antenna which are sequentially arranged from bottom to top, the substrate layer is made of a Ti material, the dielectric layer is made of an Al2O3 material, the ultrathin film layer and the antenna are both made of a TiN material, and the at least one antenna is made of a TiN material. The projections of the substrate layer, the dielectric layer and the ultrathin film layer on the XOY plane are square, and the projection of the antenna on the XOY plane is circular. The device has the advantages of simple structure, easiness in actual processing and production, good absorption effect and good stability.

Solar thermal and chemical hybrid rocket configurations for mining and other space applications are disclosed. One aspect is a rocket propulsion system configured to provide rocket thrust, including a solar absorber, a rocket nozzle, and a solar power collection system configured to collect solar energy from the sun, generate an energy beam from the collected sunlight, heat the solar absorber to transfer heat to one or more pressurized propulsive gases, and expel the heated pressurized propulsive gases through a rocket nozzle. A solar absorber can be formed from a granular collection or agglomeration of solids (e.g., of beads), which can be layered with more transparent layer(s) above and more absorbing layer(s) below to create a temperature profile in propellant(s) flowing through the absorber. A hybrid motor can provide an energy (e.g., solar) absorber for absorbing and transferring radiative energy as well as a combustion area. Multiple propellants can be present in a single chamber and be forced from a nozzle to produce thrust. Pressure in a rocket can be achieved from heating inert gasses, and alternatively or simultaneously, from mixing and igniting non-inert gasses.

The invention discloses a solar absorbent and a preparation method and application thereof. The preparation method of the solar absorbent comprises the following steps: (1) mixing rare earth metal salt, thioacid and an organic solvent, then carrying out an ultrasonic reaction, separating to obtain a solid material, drying the solid material, then carrying out high-temperature carbonization treatment, and carrying out condensation reflux to obtain a carbon-based carrier; (2) mixing a tea material, polyether amine, water and the carbon-based carrier, heating and stirring for the first time, adding an anionic surfactant, heating and stirring for the second time, freezing, dropwise adding a cobalt salt solution, mixing, and standing to obtain the solar absorbent. The novel solar absorbent obtained by the preparation method provided by the invention has the advantages of high evaporation rate, high evaporation efficiency, strong salt resistance, multiple applicable scenes, long service cycle and the like.

A passive thermal regulation system includes a substrate and a coating. The coating is positioned to encapsulate at least a portion of the substrate. The coating includes a first hydrogel layer and a second hydrogel layer. The first hydrogel layer has a plurality of carbon materials configured to absorb a solar radiation. The second hydrogel layer includes a hydrogel that is different from the first hydrogel layer. The coating, at a first temperature, causes the passive thermal regulation system to passively switch from a solar reflective state to solar absorber state to permit the plurality of carbon materials to absorb the solar radiation. At a second temperature, the coating causes the system to passively switch from the solar absorber state to the solar reflective state where the hydrogel of the second hydrogel layer inhibits the solar radiation from absorption. The second temperature is greater than the first temperature.