66 results about "Solar absorption" patented technology

The invention provides a wind-solar hydrogen production and ammonia synthesis system and a configuration method thereof, electronic equipment and a storage medium. The wind and light hydrogen production and ammonia synthesis system comprises a wind and light hydrogen production subsystem, an ammonia synthesis subsystem and a coordination controller which are relatively independent, the ammonia synthesis subsystem comprises a hydrogen storage tank, the hydrogen storage tank is connected with the wind and light hydrogen production subsystem, and the configuration method of the wind and light hydrogen production and ammonia synthesis system can be executed by the coordination controller. The configuration method of the wind-solar hydrogen production ammonia synthesis system comprises the following steps: firstly, determining capacity configuration parameters of a wind-solar hydrogen production subsystem by taking the minimum leveling hydrogen production cost as a target; and determining the capacity configuration parameters of the ammonia synthesis subsystem based on the capacity configuration parameters of the wind-solar hydrogen production subsystem by taking the maximization of the wind-solar absorption rate, the minimization of the total cost of the system and the minimization of the operation cost of the system as targets. The wind and light hydrogen production subsystem and the ammonia synthesis subsystem are subjected to two-stage decoupling type system configuration, and stable operation of the ammonia synthesis process is ensured while efficient utilization of green electricity is achieved.

The utility model discloses a solar heat-driven absorption type refrigerating, humidifying and dehumidifying seawater desalination system, which comprises a seawater flowing system, an air circulating system, an absorption type refrigerating circulating system and a solar heat collection circulating system. The fresh water preparation device has the beneficial effects that (1) circulating air is used as a carrier of water, fresh water is prepared by humidifying and dehumidifying the air through seawater or brackish water, the water quality is safe, the operation is safe and reliable, and the fresh water preparation device is suitable for small-scale fresh water preparation; and (2) the solar absorption refrigeration technology and the humidifying and dehumidifying seawater desalination technology are coupled, so that the dependence on energy is low, the system flexibility is high, and the distributed and miniaturized development of the seawater desalination system is facilitated. And (3) the cooling capacity and the heat of the evaporator, the condenser and the absorber of the absorption refrigeration cycle system can be effectively utilized in the seawater flowing and air circulation system, so that the water yield and the water production ratio of the system are improved, and the seawater desalination efficiency is improved.

The invention relates to the technical field of new energy, and discloses a maximum solar tracking energy storage type charging pile which comprises a bottom plate, a charging pile body fixedly connected to the top of the bottom plate, a charging port formed in the surface of the charging pile body, and a charging pipe fixedly connected to the bottom of the inner wall of the charging port. Comprising a telescopic pad fixedly connected with one end of a telescopic plate, the end, away from the telescopic plate, of the telescopic pad is fixedly connected with a compression cavity, and the top of the compression cavity is fixedly connected with an inserting plate. According to the cleaning device for the surface of the solar absorption plate, the compression assembly is arranged, and when a stretching ring slides towards the inner side, a telescopic pad can be extruded, so that the telescopic pad is driven to stretch towards the inner side and generate air pressure, the air pressure is conveyed into a conveying plate through an inner air cavity of a telescopic plate, and the air pressure can be conveyed into the cleaning device for the surface of the solar absorption plate through the conveying plate; and a cleaning device of the solar absorption plate can be started to clean dust on the surface, so that the dust on the surface of the absorption plate cannot be accumulated to influence the absorption efficiency.

The invention discloses a passive radiation-cold storage composite box body and a preparation method. The box body sequentially comprises a composite radiation film, a heat insulation layer and a cold storage layer from outside to inside. The outer-layer radiation film is composed of an elastic organic matrix and high-reflection inorganic particles such as barium sulfate, has high solar reflectivity and mid-infrared high emissivity, and can effectively restrain solar absorption and achieve radiation heat dissipation in the daytime. The heat insulation layer is made of XPS, EPS, aerogel felt and other low-heat-conduction materials so as to reduce external heat transfer. Phase change microcapsules are dispersed in the cold storage layer, and flake graphite and other high-thermal-conductivity fillers can be added to improve the cold transfer efficiency and temperature uniformity. And the phase-change material realizes automatic cold storage and cold release through a latent heat mechanism, so that the temperature in the box body is kept stable. Through the synergistic effect of radiation refrigeration, heat insulation and phase change cold storage, long-time and recyclable passive cold chain temperature control is achieved, and the device has the advantages of being simple and convenient in structure, high in cost performance, flexible in application, uniform in internal temperature distribution and the like.

The invention relates to the technical field of photo-thermal materials, and discloses a photo-thermal composite material and a preparation method and application thereof. The photo-thermal composite material is a layered composite metal hydroxide; wherein metal sulfide grows on a laminate of the layered composite metal hydroxide in situ. And dissolving the layered composite metal hydroxide, a sulfur source and a structure-directing agent in a solvent, and reacting to obtain the photo-thermal composite material. The method provided by the invention is green and efficient, overcomes the defects of tedious steps and low yield of preparation of the photo-thermal composite material in the prior art, and improves the sunlight absorption performance, photo-thermal conversion capability and photo-thermal stability of the photo-thermal composite material by virtue of the interaction between the layered composite metal hydroxide and the sulfide.

The invention relates to an intelligent thermal control device with a high emissivity change value and a low solar absorptivity and a preparation method thereof. The intelligent thermal control device with the high emissivity change value and the low solar absorptivity is of a multi-layer composite structure and sequentially comprises a light base material, an infrared high-reflection metal layer, a transparent medium layer, a VO2 phase change layer, an infrared antireflection layer and a visible light reflection increasing layer from bottom to top. The infrared antireflection layer is made of germanium or silicon; the visible light reflection increasing layer is of a multi-layer structure formed by alternating high-refractive-index material films and low-refractive-index material films, and the materials are at least two of HfO2, Al2O3, TiO2, Ta2O5, SiO2, CaF2, MgF2, ZnSe and ZnS.

The film is of a layered structure, the middle of the film is an organic base material, the base material comprises a first surface and a second surface, and a transition layer, an electromagnetic absorption layer, an isolation layer, an electromagnetic reflection layer and a thermal radiation reflection layer are sequentially distributed on the first surface and the second surface. Meanwhile, penetrating through holes are distributed in the surface of the film, and conductive layers are attached to the inner walls of the through holes to communicate all the layers. The thin film utilizes the closed reflection effect of the electromagnetic reflection layer and the loss effect of the electromagnetic absorption layer, and the electromagnetic shielding effectiveness of the thin film in the wave band of 10 MHz to 10 GHz is larger than 80 dB; the hemispherical emissivity of the heat radiation reflecting layer on the outermost layer is 0.03-0.05, and the solar absorptivity is 0.09 + / -0.02. The preparation method of the thin film comprises the steps of substrate plasma modification, magnetron sputtering deposition of the multi-layer functional film, punching, vacuum evaporation plating of the heat radiation reflecting layer, annealing treatment and the like, and the process controllability is high. The thin film integrates the functions of electromagnetic shielding, thermal control, static prevention and heat dissipation, and has important application value in the field of aerospace equipment.

The invention provides a universal, simple and extensible intramolecular hydrogen bond activation strategy for preparing the covalent organic framework material by utilizing a Michael addition method. The material can be efficiently prepared within an extremely short time, and has the characteristics of high crystallinity, high porosity, high stability, rich functional groups and the like, in addition, the COF material can be very conveniently subjected to structure and functional design, and various functional groups can be easily introduced in advance or after modification. Due to the unique structure, rapid gram-scale synthesis can be realized through a simple amplification experiment, and high crystallinity is still realized. Wherein the COF rich in azobenzene groups has a proper pore structure and good solar energy absorption and photo-thermal conversion performance, can provide a proper catalytic microenvironment temperature under illumination after being loaded with lipase, realizes catalytic resolution of a chiral substrate, and has a great industrial practical application prospect.

The application discloses a heat control device and method for a flexible thin film antenna in space, which is mainly used for providing heat control for large flexible antennas such as phased array radars in space. A solar shield with high infrared emissivity, low solar absorptivity and microwave permeability is arranged on the front surface of the antenna, and when the back surface of the antenna is irradiated by the sun, the solar shield can quickly dissipate heat by using the high infrared emissivity, and when the front surface of the antenna is irradiated by the sun, the solar shield can prevent the antenna from absorbing too much heat and making the temperature of the antenna too high by using the low solar absorptivity; an insulating layer and a low solar absorptivity coating are arranged on the back surface of the antenna, and when the back surface is irradiated by the sun, the low solar absorptivity coating can reflect most of the solar heat, and when the back surface is in a shadow area, the insulating layer can prevent the temperature of the antenna from being too low. Therefore, the antenna can always be in a relatively suitable temperature range in the complex and changeable space orbit thermal environment. The application has the characteristics of strong adaptability and wide applicability.

The invention particularly relates to a polyimide flexible composite film for spaceflight and a preparation method of the polyimide flexible composite film. The polyimide flexible composite film for spaceflight comprises an optical function layer, a supporting layer, a bonding layer and a reinforcing layer which are sequentially stacked. According to the invention, through the design and preparation process of the four-layer structure composite film, the product weight reduction is realized, the weight is reduced compared with the existing product, and the launch cost of a spacecraft can be reduced; the heat control performance is good, the solar absorption ratio of an aluminized surface is low, the hemispherical emissivity is low, the alpha s / epsilon h ratio is small, and the heat control characteristic is superior to that of a traditional aluminized film; an ultra-thin structure design is adopted, and the thickness is smaller than that of existing similar products; by introducing the silicon dioxide protective layer, the tolerance of the aluminum layer to atomic oxygen is improved, the service life of the material in a space environment is prolonged, the optical performance change is small after a thermal cycle test, and the material has good environmental adaptability; meanwhile, certain electromagnetic shielding capability is achieved, and the aerospace application requirement can be met.

The present application relates to a kind of functional protective coating, the coating is made of the following mass parts of raw materials: functional pigment 10~13 parts, filler 2~5 parts, high temperature resistant resin 21~43 parts, anhydrous ethanol 43.7~51 parts, dispersing agent 4~10 parts, defoaming agent 0.3~1.1 parts, leveling agent 3~6 parts;The functional pigment is high-entropy boride ceramic material, the cation in the high-entropy boride ceramic material is at least 5 kinds in metal element Co, Ni, Cr, Cu, Fe and Mo, and each metal element is equimolar ratio.Simultaneously, the preparation method of the functional protective coating is disclosed.The coating obtained by the present application has the characteristics of excellent performance, wide application range, low cost and simple construction process, and has high temperature corrosion resistance, anti-coking, high infrared radiation and solar absorption capacity.

The application discloses a solar refrigeration system with a cold storage function, comprising a solar absorption refrigeration device, wherein the solar absorption refrigeration device comprises a solar heat collector and an absorption refrigeration system, the absorption refrigeration system comprises a generator, a first condenser, a first throttling valve, a first evaporator and an absorber, steam or hot water generated by the solar heat collector is used as a heat source of the absorption refrigeration system, and the solar refrigeration system further comprises a vapor compression refrigeration device, a cold storage device and a controller. The solar refrigeration system with the cold storage function and the control method thereof can maximize utilization of solar energy resources and fully utilize the advantages of the absorption refrigeration system, and solve the problem of energy waste caused by closing the absorption refrigeration system or simultaneously starting the absorption refrigeration system and other mode refrigeration in the prior art.

The application belongs to the technical field of solar absorption refrigeration and air water production, and discloses a solar-driven absorption water production device coupled with a loop heat pipe and a solution energy storage.The application has two working states, namely, a charging state and a discharging state.The energy storage unit converts the excess solar energy into the chemical potential energy of the solution and stores the chemical potential energy into a storage tank when the solar energy is sufficient.The energy storage unit can continue to maintain the operation of the absorption refrigeration when the solar energy is insufficient, and the water production process is completed.In the application, the absorption refrigeration unit adopts a water-lithium bromide working medium pair, the absorption refrigeration is driven by the solar energy to realize the cooling air dew condensation water production, the energy storage unit can ensure that the device can continuously work and produce water when the solar energy is insufficient, the heat pipe loop can improve the cold quantity transmission efficiency and the water production efficiency, and the device structure is compact.The application is energy-saving and environment-friendly, can satisfy the fresh water demand of people at any time, and can effectively solve the problem of lack of fresh water resources in coastal areas.

The invention relates to the field of surface engineering, and discloses a micro-arc oxidation electrolyte and application thereof, a thermal control film layer and a preparation method thereof, and a thermal control component. The electrolyte comprises silicate, phosphate, lanthanum salt and hydroxide, and the pH value of the electrolyte is strong alkaline. According to the strong alkaline electrolyte suitable for preparing the micro-arc oxidation thermal control film layer, the lanthanum salt with the valence of + 3 is introduced into the electrolyte, the lanthanum salt, the silicate and the phosphate form an adaptive composite salt system, and the thermal control film layer with the low solar absorptivity and the high infrared emissivity can be formed on the surface of a metal base material through the micro-arc oxidation technology; and meanwhile, the hardness of the film layer is remarkably improved to 450 HV or above, and the precise assembly requirement of light-weight components is met.

This invention discloses a tethered binary star multi-condition adaptive thermal control structure, including a primary star thermal control module, a secondary star thermal control module, a dynamic thermal management module, and a binary star collaborative thermal management module. The adaptive thermal control structure adopts a hybrid architecture of passive heat dissipation as the primary method and active heating as a secondary method. The primary star thermal control module has a low solar absorptivity, high infrared emissivity, and anti-atomic oxygen white paint coating applied to the -X, -Y, and +Z planes of the primary star. It is equipped with a 10-unit modular multilayer thermal insulation component and a high thermal conductivity graphite film, with the overall weight controlled to ≤1.25kg. This invention is rationally designed and provides a hybrid thermal control architecture of passive heat dissipation as the primary method and active heating as a secondary method, achieving primary / secondary star zoned thermal control, multi-condition dynamic adaptation, and binary star collaborative thermal management, meeting weight, power constraints, and full-cycle temperature requirements.

The invention relates to a near-blackbody high-entropy inverse spinel oxide material, the general formula of the material is (A1xA2yA3zA4uA5v) 3O4, A1, A2, A3, A4 and A5 are any five elements of Fe, Ni, Co, Cr, Mn, Cu and Ti, x, y, z, u and v are equal or approximately equal, and x + y + z + u + v = 1; the structure of the material belongs to a cubic system and has an inverted spinel crystal structure, and the space group of the material is Fd-3m. Meanwhile, the invention also discloses a preparation method of the material. The method is simple to operate and short in production cycle, the obtained high-entropy inverse spinel oxide material has high solar absorptivity and infrared emissivity, the radiation curve of the high-entropy inverse spinel oxide material is close to an ideal black body radiation curve, and the high-entropy inverse spinel oxide material can be widely applied to the fields of radiation heating, human body heat management, aerospace heat dissipation, photovoltaic device cooling and the like.

The present invention discloses a carbon-based metastable photoacid composite material, a preparation method thereof, and an application in CO2 capture, belonging to the field of CO2 capture and solar energy utilization. The carbon-based metastable photoacid composite material is composed of a carbon-based material and a metastable photoacid, and the mass ratio of the carbon-based material to the metastable photoacid is 1:(1~30). The composite material utilizes the metastable photoacid to absorb the ultraviolet band in the solar spectrum, and the carbon-based material absorbs the visible-infrared band in the solar spectrum, thereby achieving full-spectrum solar absorption; wherein the ultraviolet band photons are converted into chemical energy by the metastable photoacid, and the visible-infrared band photons are converted into thermal energy by the carbon-based material. The synergistic conversion of solar light chemistry and heat causes the CO2-rich liquid to undergo chemical desorption and thermal desorption simultaneously, thereby achieving quality and efficiency improvement of the desorption of the CO2-rich liquid driven by solar energy. The present invention can realize the full-spectrum utilization of solar energy, solving the problem of inefficient solar energy utilization caused by the single conversion mode and low conversion efficiency of the existing solar carbon capture technology.

The invention provides a spectrum selective absorption thermal control filler and a preparation method thereof, the chemical composition of the spectrum selective absorption thermal control filler is Ti < 1-x > MxO < 2-0.5 x >, M represents one or more of Gd, Yb and Ga, x is more than 0 and less than or equal to 0.5, and titanium dioxide and trivalent oxide powder are subjected to solid-phase synthesis in a high-temperature environment. Titanium oxide is doped with trivalent oxide, oxygen vacancies are introduced while lattice distortion is generated, lattice symmetry is reduced, carrier concentration is improved, an infrared absorption band is widened, low solar absorption ratio is kept while high emissivity is obtained, and selective absorption of spectrums is achieved; and the infrared emissivity at 600 DEG C can reach 0.80-0.85, the solar absorptivity is 0.20-0.35, and an excellent high-temperature heat dissipation effect is achieved.

Thermal control coatings are shown and described herein. The thermal control coating is provided from a two component addition cure silicone composition. The composition includes a curable siloxane and titanium dioxide. The compositions are fast curing compositions that exhibit low solar absorptivity, high solar reflectance, and / or high infrared emissivity when cured. In addition, the composition exhibits good flexibility when cured, and can be applied to a surface without the aid of a primer.

The present invention provides a cellulose MOF photothermal film and its preparation method and application. The preparation method of the cellulose MOF photothermal film of the present invention, with a fiber textile cloth as a substrate, forms a MOFs coating on the surface of the textile cloth fiber to form a ZIF 8 layer; based on the ZIF 8 layer, a polypyrrole layer is formed on its surface by vapor deposition to form a cellulose MOF photothermal film. The specific steps of the preparation method are as follows: (1) the fiber textile cloth is immersed in an aqueous solution of zinc nitrate, and after taking out the non-woven fabric, it is placed in a 2-methylimidazole solution and allowed to stand; (2) the cellulose textile cloth treated in step (1) is dried and immersed in an ammonium persulfate solution, the cellulose textile cloth modified with ammonium persulfate is taken out and dried and sealed in a container, and vaporized pyrrole is introduced into the container. The cellulose MOF photothermal film prepared by the method of the present invention effectively improves the evaporation performance of the photothermal composite film, and can be better applied to the preparation of solar absorption materials or evaporation systems / devices / equipment, etc.

The invention discloses a heat dissipation electromagnetic shielding film for spaceflight and a preparation method thereof, the prepared film is of a multi-layer structure, and a transition layer, an electromagnetic absorption layer, an isolation layer, an electromagnetic reflection layer and a thermal radiation reflection layer are sequentially arranged on a first surface of a base material; an electromagnetic reflecting layer, a heat radiation reflecting layer, a heat radiation layer and an anti-static layer are sequentially arranged on the second surface of the conductive base material; through holes are distributed in the surface of the electromagnetic shielding film; metal coatings are attached to the inner walls of the through holes, and all layers of the thin film are communicated through the metal coatings. The anti-static layer is prepared by sequentially sputtering the electromagnetic reflecting layer on the second surface of the base material, depositing the thermal radiation reflecting layer through vacuum evaporation, then coating the thermal radiation layer and curing, and coating conductive liquid or in a magnetron sputtering mode. The second surface of the electromagnetic shielding film has low solar absorptivity and high hemispherical emissivity, the solar absorptivity is less than or equal to 0.40, the hemispherical emissivity is not less than 0.60, and the electromagnetic shielding film has a good heat dissipation function and adapts to harsh application scenes in the aerospace field.

The invention relates to a sunscreen fiber, a preparation method thereof and a radiation refrigeration fabric. The sunscreen fiber comprises a core layer and a skin layer coating the surface of the core layer, wherein the core layer comprises a carbon-based nano material, the skin layer comprises radiation refrigeration particles, the absorptivity of the carbon-based nano material to sunlight at the wave band of 0.3-2.5 microns is a, the mass fraction of the carbon-based nano material in the core layer is m1, the atmospheric window emissivity of the radiation refrigeration particles at the wave band of 8-13 microns is b, and the sunlight reflectivity of the radiation refrigeration particles at the wave band of 0.3-2.5 microns is c, the mass fraction of the radiation refrigeration particles in the skin layer is m2, and a, b, c, m1 and m2 meet the following condition that c is larger than or equal to 88%. The sunscreen fiber has excellent sunlight total spectrum reflection performance and shading performance, and the radiation refrigeration fabric prepared from the sunscreen fiber as a raw material has extremely low sunlight transmittance, so that a better radiation refrigeration effect can be achieved.

The invention discloses a composite film with low solar absorptivity and low infrared emissivity and a preparation method thereof, and relates to a thermal control composite film and a preparation method thereof. The invention aims to solve the problems that the solar absorptivity and the absorption-emission ratio of the conventional thermal control film cannot be further reduced, the environmental stability of the film is poor and the preparation process is complicated. The composite film is composed of a substrate, a transition material layer I, a transition material layer II, a reflecting layer, a transition material layer II and a dielectric layer in sequence from bottom to top. The preparation method comprises the following steps: 1, film layer deposition pretreatment; and 2, depositing a film layer. The invention is used for the composite film with low solar absorptivity and low infrared emissivity and the preparation thereof.

The application relates to a low-temperature working medium pair and application thereof, the low-temperature working medium pair comprising an absorbent and a refrigerant, the absorbent is used for absorbing the refrigerant and emitting heat, the refrigerant is used for absorbing heat and evaporating, the absorbent comprises an organic absorbent, an ionic liquid absorbent or is a composite absorbent; the refrigerant is HFO-1233zd (Z) or a composite refrigerant containing the component. The low-temperature working medium pair is used for fuel cell low-temperature waste heat utilization and other low-grade waste heat (building materials, metallurgy, food processing, chemical industry) utilization technologies based on the absorption refrigeration or heating principle, such as recovering industrial low-temperature waste heat by using the absorption technology to carry out refrigeration or heating, solar absorption heating or refrigeration.

The invention discloses an evaporation-induced power generation Janus fiber membrane and a preparation method thereof, belongs to the technical field of preparation of fiber membrane materials, and realizes evaporation-induced water flow power generation by constructing an asymmetric hydrophobic / hydrophilic structure through an electrostatic spinning technology and combining high photothermal conversion of CB / PAN and heat insulation and current limiting characteristics of PDMS / PMMA. The film has an ultra-high solar absorptivity of more than 96% in a broadband wavelength range of 250-2500nm, has ultra-wide spectrum efficient light capturing capability, covers ultraviolet-visible-near infrared full wavebands, synchronously outputs a voltage of more than 0.5 V, and is suitable for a water and electricity co-production system.

The utility model provides a solar panel connecting device and a swing frame, and belongs to the technical field of connecting equipment, the solar panel connecting device comprises a connecting piece used for being fixedly connected with the swing frame; the steering adjusting piece comprises a first connecting part connected with the connecting piece, a second connecting part is arranged on the first connecting part in a hinged mode, and a third connecting part is arranged on the second connecting part in a hinged mode; the hinge rotation direction of the second connecting part relative to the first connecting part is perpendicular to the hinge rotation direction of the third connecting part relative to the second connecting part, and the third connecting part is used for being fixed to a solar panel. The solar swing has the advantages that through the unique multi-hinge design of the solar panel connecting device, the solar panel can flexibly swing in multiple directions relative to the swing frame, and therefore the solar energy absorption efficiency is remarkably improved.

The invention provides a thermal control coating with high temperature, high infrared radiation and high solar spectrum reflection performance, a coating and a preparation method. The thermal control coating comprises a prime coating and a surface coating, the bottom layer coating takes a silica sol modified lithium silicate solution as a bottom layer binder, takes mixed powder of copper chromite and zinc orthotitanate as a bottom layer filler, and takes water as a solvent; and the surface layer coating takes a silica sol modified lithium silicate solution as a surface layer binder, takes mixed powder of zinc orthotitanate and 8YSZ (8mol% Y2O3 doped ZrO2) as a surface layer filler, and takes water as a solvent. The thermal control coating is formed by spraying a thermal control coating, the bottom layer is obtained by spraying the bottom layer coating, and the surface layer is obtained by spraying the surface layer coating on the bottom layer. Through coating structure optimization and ingredient improvement, the high-temperature heat dissipation coating has high high-temperature emissivity and low solar absorptivity, the infrared emissivity at 600 DEG C can reach 0.80-0.85, the solar absorptivity is 0.30-0.40, and the high-temperature heat dissipation coating has a good high-temperature heat dissipation effect.

The present invention discloses an in-situ test device for thermal physical property parameters in a space environment irradiation test, which includes a vacuum irradiation chamber (1), an in-situ test system (2), an automatic sample taking / sending system (3) and a vacuum pumping system (4). The test device of the present invention can be applied to the in-situ test of various performance parameters such as the solar absorptance, emissivity and electrical properties of materials after space environment irradiation tests, and realizes the real-time measurement of the attenuation changes of various properties of materials during space environment irradiation tests; moreover, a supercontinuum light source is used to test the solar absorptance, which makes up for the relatively large fluctuations in the test results in the ultraviolet band during the test with a composite light source, and improves the stability and accuracy of the measurement results.

A zero-energy thermoelectric generator based on radiative cooling and photothermal heating belongs to the technical field of zero-energy thermoelectric power generation equipment. The generator comprises a bracket, a V-shaped polished metal plate, a photothermal heating film, a radiative cooling film, and a thermoelectric generator sheet. The radiative cooling film and the photothermal heating film are adhered to either side of the thermoelectric generator sheet using thermally conductive silicone and placed between the V-shaped polished metal plate. The MXene of the present invention combines high solar absorptivity with low infrared emissivity, providing excellent photothermal heating during the day with minimal temperature drop at night. The cooling end utilizes a PAN electrospun membrane, a material with high solar reflectivity and high infrared emissivity, providing a cooling effect both daytime and nighttime. Therefore, due to the performance of these two materials, a temperature difference is formed across the thermoelectric generator sheet throughout the day, enabling continuous electrical energy generation.

The application relates to a spinel-perovskite dual-phase high-entropy ceramic powder material, which has a chemical formula AMn x O y wherein A is three transition metal elements selected from Cu, Ni, Co, Zn and Mg and one rare earth element selected from La, Pr and Nd, the elements are in equal molar ratio, 1 < x < 2 and 3 < y < 4, the material has a face-centered cubic crystal structure spinel phase and a perovskite phase. Meanwhile, the application also discloses a preparation method of the high-entropy ceramic powder material. The high-entropy ceramic powder material has the characteristics of two-phase coexistence, high purity, small particle size (100-400 nm) and uniform element distribution, and has excellent solar absorptivity (>0.87), infrared emissivity (>0.90) and high-temperature thermal stability (1600 DEG C), and can be widely used in the field of high-temperature thermal radiation, including aerospace, industrial kiln, power station boiler and the like, as an infrared radiation material and a solar energy absorption material.