20 results about "Solar absorptance" patented technology

The invention relates to the technical field of temperature control, in particular to an intelligent solar heat supply temperature management and adjustment system which comprises a thermal distribution modeling module, a thermal equilibrium optimization module, a fluid heat transfer design module, a dynamic layout adjustment module and an environmental factor coupling module. According to the method, through calculation based on solar radiation intensity and heat absorption parameters, a thermal distribution field is accurately established, a dynamic optimization basis is provided, thermal gradient differences are reduced, heat distribution balance is achieved, and through optimization of heat absorption coating covering density and pipeline layout, the heat energy transfer efficiency is improved, and local overheating and energy loss are reduced; pipeline distribution and fluid flow rate optimization are combined with heat transfer oil heat exchange performance, heat transfer efficiency is enhanced, radiation angles and layout parameters are dynamically adjusted, the solar energy absorption rate of the heat collection device is improved, output parameters are adjusted in real time in combination with environment temperature and wind speed, the capacity of the system for adapting to complex climate conditions is improved, and efficient and stable heat energy utilization is achieved.

The invention discloses paint baking equipment and technology for high-temperature paint of a nickel-based tube panel of a solar heat absorber, and aims at solving the problems that in the paint baking process of high-temperature paint of a tube panel of an existing solar heat absorber, the equipment universality is poor, and a paint film is prone to being damaged due to unreasonable technological parameters. The equipment is high in flexibility, the sectional design can adapt to tube panels of different sizes, and the equipment investment cost is reduced; the process stability is high: through the pre-baking step and the baking temperature adjustment, the paint film explosion is avoided, and the adhesive force is improved by more than 30%; the solar energy absorption rate stably reaches 95%, and the thermal shock resistance of the tube panel can meet more than 1000 times of cycle tests.

To provide an exterior laminate that can be used as an exterior component and is capable of sufficiently suppressing heat accumulation due to radiant heat such as sunlight. [Solution] An exterior laminate 10 is disclosed, having, in order from the surface side, a) a transparent film layer 1 containing an acrylic resin, c) a printed layer 2, and b) a colored film layer 3 containing a polyvinyl chloride resin, wherein the printed layer 2 of c) does not contain carbon black, the solar transmittance of the printed layer 2 of c) is 70% or more, and the solar absorptance is 20% or less. Preferably, the printed layer 2 of c) contains a perylene-based colorant and / or a phthalocyanine-based colorant.

The present invention belongs to the field of surface engineering technology, and specifically relates to an oxide-based gradient multi-phase nanocomposite coating and a preparation method thereof. The composite coating includes a Cr-Al-Si layer, a Cr-Al-Si-N layer, and an xAl2O3-yCr2O3-zSiO2-kY2O3-iEr2O3 layer arranged in sequence. The xAl2O3-yCr2O3-zSiO2-kY2O3-iEr2O3 layer is a nano multi-phase composite layer composed of Al2O3, Cr2O3, SiO2, Y2O3, and Er2O3 phases, and the molar ratio between each phase is x:y:z:k:i, where 0 < x, y, z, k, i < 0.4, and x + y + z + k + i = 1. This coating is obtained by using pulsed multi-arc ion plating and radio frequency magnetron sputtering for the corresponding coatings respectively in a vacuum environment. The coating of the present invention has the characteristics of high bonding strength, high hardness, high hydrogen resistance factor, high solar absorptance, and low solar emittance, with excellent performance, and can greatly improve the problem of performance deterioration of the base material caused by hydrogen permeation.

The present disclosure relates to materials, and specifically to materials such as sheet, molded or extruded polymer materials containing flake, formed, powdered, granulated or splintered borosilicate glass for heat rejection or mitigation and enhanced durability and strength. The invention provides a synthetic substrate that includes: 1 to 70 wt % borosilicate glass having an average size of 0.1 to 50 um; and 30 to 99 wt % polymer material, wherein the synthetic substrate has either a denier ranging between 0.1 to 20.0 or a thickness ranging between 0.1 to 20 MIL, which provides thermal management properties including reduction in solar absorptance and net power absorbed by surfaces. The greater the intensity of the solar radiation the more reactive the borosilicate becomes, reflecting and dissipating an increased level of energy.

Coating compositions include a binder that has a first polymeric material that does not undergo ultraviolet (UV) degradation and / or does not absorb UV radiation / light. The coating compositions may further include at least a first UV-reflective pigment dispersed throughout the binder. The coating compositions may be provided in a cured form as a solid coating layer that may overly at least a portion of a substrate.

A thermal insulation material for a garment is provided that includes a solar energy transmissive shell fabric, a solar energy transmissive insulation layer, and a solar energy absorbing liner fabric. The solar energy absorbing liner fabric includes a plurality of thermal insulation elements coupled to the liner fabric, such as a weighted average thermal emittance of less than 0.8 (or 80%). The thermal insulation elements include a low thermal emittance layer and a high solar energy absorptivity layer.

The invention relates to a high-entropy two-dimensional transition metal MXene broadband light-absorbing material which is composed of an M-layer element, an A-layer element and graphite powder, an A-layer Al element is etched through a LiF-HCl mixed solution with the mass concentration of 40% to form a two-dimensional layered structure, and the chemical general formula of the material is M3C2; wherein the elements of the M layer are any five metal elements of Ti, Zr, Nb, Mo, Hf and W, and the metal atoms are in an equal molar ratio; and the element of the A layer is Al. Meanwhile, the invention also provides a preparation method of the material. The preparation method is easy, high in repeatability and high in production efficiency and can be used for industrial large-scale production, the solar energy absorption rate of the prepared broadband light absorption material within the waveband range of 0.3-2.5 microns is 0.891-0.910, and the broadband light absorption material can be widely applied to solar photo-thermal conversion materials.

This invention relates to a light-absorbing material and its preparation method, disclosing a broadband light-absorbing material and its preparation method. The broadband light-absorbing material, with the molecular formula AB2, is a porous particle. The solar energy absorption rate of this broadband light-absorbing material in the 0.3–2.5 μm wavelength range is 0.891–0.909. It is prepared by dissolving any five of the following six metal raw materials—Co(NO3)3·6H2O, Ni(NO3)2·6H2O, Cr(NO3)2·9H2O, Cu(NO3)2·3H2O, FeSO4·7H2O, and Mn(NO3)2 solution—in deionized water that has been purged with nitrogen or an inert gas to obtain a salt solution. Then, an aqueous solution of NaBH4 is dissolved in the same deionized water to obtain an aqueous solution of sodium borohydride. The solution is then reacted, filtered, frozen, and dried. The preparation method is easy, highly reproducible, and has high production efficiency, making it suitable for large-scale industrial production.

The present invention belongs to the field of surface engineering technology, and particularly relates to a chromium-aluminum oxide-based gradient nano-multilayer coating and a preparation method thereof. The multi-layer coating includes a Cr layer, a CrOx layer, and a [Cr2O3 / (yCr2O3 + Al2O3)]n layer sequentially arranged on a substrate layer. The [Cr2O3 / (yCr2O3 + Al2O3)]n layer is a nano-multilayer formed by alternately stacking a Cr2O3 layer and a (yCr2O3 + Al2O3) layer n times. The (yCr2O3 + Al2O3) layer is a nano-composite structure formed by the composite of Cr2O3 and Al2O3, and the molar ratio of Cr2O3 to Al2O3 is 0.4 ≤ y ≤ 0.6. In a vacuum environment, the coating is obtained by first sputtering a Cr layer and a CrOx layer on the substrate layer, and then alternately sputtering a Cr2O3 layer and a (yCr2O3 + Al2O3) layer on the CrOx layer. The coating of the present invention has the characteristics of high bonding strength, high hardness, high hydrogen resistance factor, high solar absorptance, and low solar emittance, with excellent performance, and can greatly improve the problem of performance deterioration of the base material caused by hydrogen permeation.

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 heat-management material that includes a base fabric having an externally facing surface and an internally facing surface; and a plurality of multilayered multifunctional heat-management elements coupled to the externally facing surface of the base material wherein the heat-management material has weighted average thermal emittance of less than 0.8 (or 80%). The multilayered multifunctional heat-management elements include a low thermal emittance layer and a high solar absorptance layer.

The invention relates to ferromanganese black doped calcium-based heat storage particles as well as a preparation method and a forming system thereof. The preparation method comprises the following steps: (1) fully mixing water, Ca (OH) 2 and ferromanganese black to obtain a solid-liquid mixture; sequentially filtering and drying the solid-liquid mixture to obtain doped Ca (OH) 2; calcining the doped Ca (OH) 2 in a nitrogen atmosphere to obtain doped CaO; (2) stirring and dissolving a binder and water to obtain a binder solution, then adding doped CaO into the binder solution, and continuously stirring to obtain heat storage particle slurry; dropwise adding the heat storage particle slurry into propyl alcohol, and solidifying and aging to obtain hydrated heat storage particles; and fishing out the hydrated heat storage particles, and sequentially drying and calcining the hydrated heat storage particles to obtain the calcium-based heat storage particles. The heat storage particle slurry is solidified and formed, the solar energy absorptivity and cycling stability of the calcium-based heat storage material are improved, and the high-performance calcium-based heat storage particles for solar energy absorption and utilization are prepared in a simpler, more convenient and more feasible mode.

The invention relates to the technical field of intelligent thermal control, in particular to a flexible intelligent thermal control device and a preparation method and a regulation and control method thereof. The device comprises a transparent upper substrate, a top electrode structure, an electrolyte layer, a bottom electrode layer and a transparent lower substrate which are sequentially stacked, the top electrode structure is a multi-layer composite structure comprising a conductive layer, a deposition catalyst layer and a surface structure layer; and the electrolyte layer contains metal salt capable of generating reversible electrodeposition reaction. According to the invention, a metal reversible electro-deposition mechanism is combined with a unique multi-layer top electrode structure, so that independent, collaborative and dynamic regulation and control of visible light and infrared dual wavebands are realized; the problems that an existing intelligent thermal control technology is single in function, or regulation and control of the solar absorptivity and the infrared emissivity are seriously coupled, and the dynamic thermal environment is difficult to independently optimize and adapt are solved.

The present application relates to a kind of high-entropy two-dimensional transition metal MXene wide-band light-absorbing material, the material is made of M layer element, A layer element and graphite powder, and two-dimensional layered structure is formed by etching A layer Al element with 40% mass concentration LiF-HCl mixed solution, and its chemical general formula is M3C2;Wherein: M layer element is any five kinds of metal elements in Ti, Zr, Nb, Mo, Hf and W, and metal atom is equimolar ratio;A layer element is Al.Meanwhile, the present application also provides the preparation method of the material.The preparation method of the present application is easy, strong repeatability, high production efficiency, can be used for industrial mass production, and the prepared wide-band light-absorbing material has solar energy absorption rate of 0.891~0.910 in 0.3~2.5 μm wave band range, and can be widely applied to solar light-heat conversion material.

A carbonized manure photothermal evaporator derived from naturally abundant farm waste has high solar absorptance, effective water transportation, and rapid salt dissipation. It achieves high evaporation under 1-sun irradiance and is recyclable, durable, and cost-effective for use in energy-efficient solar-driven interfacial desalination.

A thermal control coating is disclosed and described herein. The thermal control coating is provided by a two-part, addition-cure silicone composition. The composition includes a curable siloxane and titanium dioxide. The composition is fast-curing and, when cured, exhibits low solar absorptance, high solar reflectance, and / or high infrared emissivity. Additionally, the composition, when cured, exhibits good flexibility and can be applied to a surface without the aid of a primer.

An apparatus includes a strength member including a core formed of a composite material, and an encapsulation layer disposed around the core. A conductor layer is disposed around the strength member. A coating is disposed on the conductor layer. The coating is formulated to have a solar absorptivity of less than 0.5 at a wavelength of less than 2.5 microns, and a radiative emissivity of greater than 0.5 at a wavelength in a range of 2.5 microns to 15 microns, at an operating temperature in a range of 60 degrees Celsius to 250 degrees Celsius. The coating may have an erosion resistance that is at least 5% greater than an erosion resistance of aluminum or aluminum alloys.

The application discloses a high-entropy rare-earth-based hexaboride ceramic material and a preparation method and application thereof, and has the following general chemical formula: RE(AE) x B6, wherein RE is selected from at least three of rare earth elements La, Nd, Sm, Eu, Gd, Dy, Ho, Yb, Tm, Lu, Sc and Y, AE is selected from one of alkaline earth elements Be, Mg, Ca, Sr, Ba and Ra, and x is 0.2-0.5. The high-entropy rare-earth-based hexaboride ceramic powder has small grains and uniform distribution, and has good optical performance, namely high solar absorption and high infrared emissivity and good high-temperature thermal stability. Meanwhile, the preparation process of the high-entropy rare-earth-based hexaboride ceramic material is simple, the operation condition is controllable, and the high-entropy rare-earth-based hexaboride ceramic material is easy to be popularized and applied.

The present disclosure relates to materials, and specifically to materials such as sheet, molded or extruded polymer materials containing flake, formed, powdered, granulated or splintered borosilicate glass for heat rejection or mitigation and enhanced durability and strength. The invention provides a synthetic substrate that includes: 1 to 70 wt % borosilicate glass having an average size of 0.1 to 50 um; and 30 to 99 wt % polymer material, wherein the synthetic substrate has either a denier ranging between 0.1 to 20.0 or a thickness ranging between 0.1 to 20 MIL, which provides thermal management properties including reduction in solar absorptance and net power absorbed by surfaces. The greater the intensity of the solar radiation the more reactive the borosilicate becomes, reflecting and dissipating an increased level of energy.