9732 results about "Sunlight" patented technology

The invention discloses an optical storage and charging integrated micro-grid energy management system, which relates to the related technical field of micro-grids and comprises an electric energy collection layer, a digital twinborn layer, a collaborative optimization layer, an application execution layer, a photovoltaic power generation unit, an energy storage unit, a charging load unit and a distributed measurement and control terminal. The invention further discloses an energy management method of the photovoltaic, storage and charging integrated micro-grid. The energy management method comprises the steps of data acquisition, digital twin modeling, multi-target strategy generation and optimization, strategy evaluation and screening, strategy issuing and execution and closed-loop feedback and dynamic correction. According to the invention, through short-term prediction of a digital twinborn layer and real-time generation of a charging and discharging strategy by a collaborative optimization layer, fluctuating renewable energy sources are preferentially consumed, the light abandoning rate is reduced, energy storage charging is automatically triggered in an illumination peak period, and power overflow is avoided; based on the simulation result of the digital twinborn model, the power distribution of energy storage and load is dynamically adjusted, so that the photovoltaic utilization rate is improved, and the dependence on a traditional power grid is reduced.

The invention relates to a preparation method of a solar cell, the solar cell and a photovoltaic module, and the solar cell comprises a substrate which comprises a first surface and a second surface. The first surface comprises a metal area and a non-metal area, and the electrode is arranged in the metal area. The metal area is provided with the first suede structure, the non-metal area is provided with the second suede structure, and the reflectivity of the second suede structure is smaller than that of the first suede structure, so that the first suede structure in the metal area is gentle, and the fluctuation amplitude of the second suede structure in the non-metal area is large. The doping layer is arranged in the metal area to prepare the emitting electrode, the uniformity of the doping layer is high due to the gentle first suede structure, and the photoelectric conversion efficiency and stability of the metal area can be improved. The second suede structure with the large fluctuation amplitude improves the sunlight absorption capacity of the non-metal area. And the first suede structure and the second suede structure are respectively provided with a passive film layer and an anti-reflection film layer, so that the efficiency and the performance of the battery are improved.

The present invention relates to the technical field of photovoltaic modules, and provides a photovoltaic module with an automatic cleaning system. The photovoltaic module comprises a brushing mechanism and a liquid supply mechanism, wherein the brushing mechanism is arranged on a photovoltaic module mounting frame, and the liquid supply mechanism is arranged on one side of the photovoltaic module mounting frame. In the present invention, the brushing mechanism cleans a solar panel while moving across the photovoltaic module mounting frame, the liquid supply mechanism flushes a surface of the solar panel to remove debris such as dust and dirt covering the surface of the solar panel, thereby ensuring a sunlight receiving effect of the solar panel, and stabilizing the power generation capacity of a power generation assembly.

The invention provides an inter-satellite laser communication sunshine avoidance method and system capable of preventing direct sunlight. Belongs to the technical field of space laser communication. The method comprises the following steps of: judging an included angle according to a satellite broadcast sun vector and a current optical axis pointing vector in real time, and if the included angle is less than 3 degrees, autonomously entering a sun avoidance mode; the sun vector is converted into an optical antenna azimuth pitching two-dimensional coordinate system, and the azimuth, the pitching value and the azimuth pitching change direction of the sun vector are determined; and when the included angle between the pointing vector and the sun vector is greater than 3 degrees, the sun avoidance is automatically ended, and the link is reestablished. According to the technical scheme, forecasting is not needed, the included angle is calculated in real time according to the current laser terminal optical axis direction and the satellite broadcast sun vector, if the included angle is smaller than 3 degrees, the solar avoidance mode is automatically entered, manual instruction uploading is not needed, and the method has the advantage that direct sunlight can be effectively avoided in the avoidance process.

The invention discloses a generating capacity loss assessment method for a photovoltaic system, and relates to the technical field of photovoltaic power generation, and the method comprises the following steps: an MPPT control system monitors the output parameters of a photovoltaic module in real time, captures the output characteristics of the photovoltaic module in real time during illumination change through the obtained operation parameter information, and determines the output characteristics of the photovoltaic module; and the MPPT control system can sense the change of the illumination condition. By monitoring the sunlight penetration rate and the surface reflectance in real time, the MPPT control system can quickly recognize illumination changes and accurately adjust the working point of the photovoltaic module, it is ensured that the system is close to the maximum power point, and energy conversion can be optimized even in complex weather. The dynamic adaptability improves the overall generating capacity and economic benefits, and meanwhile, by comparing an external environment evaluation index with a reference threshold value, a control strategy is optimized, power fluctuation is reduced, the voltage and frequency stability of a power grid is maintained, the coordination of a photovoltaic system and the power grid is enhanced, and the reliability and sustainable development of renewable energy sources are supported.

The invention belongs to the technical field of composite fiber materials, and relates to a functional thermal management fabric, in particular to a phase change microcapsule doped flexible cooling fiber fabric and a preparation method thereof. The fabric has a controllable double-layer structure and is formed by assembling nanofibers and micro-nanofibers doped with a large number of phase change microcapsules. Wherein the micro-nano fiber layer has relatively high sunlight reflectivity and atmospheric window wave band emissivity, and shows an excellent radiation cooling effect; the microcapsule content of the nanofiber layer doped with a large amount of phase change microcapsules is not less than 10 wt%, and the nanofiber layer has no rupture phenomenon, has high heat storage capacity, not only makes up for the deficiency of radiation cooling capacity, but also effectively slows down temperature fluctuation. The radiation cooling technology and the phase change latent heat technology are combined, so that the long-time temperature control performance of the fabric is realized, and the thermal shock resistance is enhanced. In addition, the fabric also has excellent mechanical property, flexibility, washability, air permeability, moisture penetrability and sunscreen property.

The invention discloses a floating type photovoltaic platform device capable of actively adjusting the angle of a photovoltaic module, which comprises floating bodies, a photovoltaic mechanism, a central control system, connecting floating bodies and gravity anchors, and is characterized in that the photovoltaic mechanism is mounted on the floating bodies, the floating bodies are connected with the gravity anchors, the gravity anchors are placed in a water area, the plurality of floating bodies are connected through the connecting floating bodies, and the central control system is connected with the central control system. The central control system is installed on the connecting floating body, the central control system is respectively connected with the floating body and the photovoltaic mechanism, the floating body comprises an adjusting air cushion and a supporting floating body, the adjusting air cushion is arranged on the supporting floating body, the photovoltaic mechanism is arranged on the adjusting air cushion, and the supporting floating body is respectively connected with the connecting floating body and the gravity anchor. The sun position and the illumination intensity are monitored in real time through the central control system, the angle of the photovoltaic mechanism is actively adjusted through the adjusting air cushion, it is ensured that the photovoltaic assembly can receive sunlight at the optimal angle all the time, and therefore the photoelectric conversion efficiency is remarkably improved.

The invention provides a solar cell, a manufacturing method thereof and a photovoltaic module, and relates to the photovoltaic field. The solar cell comprises a substrate which comprises a first surface and a second surface which are opposite to each other, the first surface is provided with a groove, microstructures are arranged on the first surface of the periphery of the groove, the bottom surface of the groove and the side face of the groove respectively, and the multiple microstructures comprise a first conical structure, a second conical structure and a columnar structure, the height direction of the first conical structure intersects with the height direction of the second conical structure, and the side face of the columnar structure inclines towards the peripheral direction of the groove. The first passivation layer is located on the first surface. The problem that in the prior art, a solar cell is low in sunlight absorption rate is at least solved.

The invention provides a building external sunshade dynamic photo-thermal regulation and control optimization method and system based on joint simulation, and relates to the technical field of building design, and the method comprises the steps: building a building model, and setting building operation parameters; constructing an external shading calculation model of the building; simulating and calculating energy consumption intensity, sunlight utilization indexes and glare probabilities under different external sunshade regulation and control thresholds according to historical meteorological data on the basis of the constructed building model and the external sunshade calculation model; and performing multi-objective optimization on the obtained energy consumption intensity, sunlight utilization index and glare probability under different external sunshade regulation and control thresholds, and determining an optimal external sunshade regulation and control threshold. The optimal external sunshade opening threshold value can be screened, and the user experience is improved.

The invention provides a perovskite laminated photovoltaic cell assembly and a preparation method thereof, the perovskite laminated photovoltaic cell assembly comprises a plurality of first battery packs connected in parallel, each first battery pack comprises a plurality of laminated cells connected in series, and each laminated cell comprises a perovskite cell and a crystalline silicon cell which are stacked; a first light absorption layer and a first hole transport layer of the perovskite cell are etched by P2 laser to form a plurality of perovskite sub-cells which are connected in parallel, and the perovskite cell is used for absorbing short-wavelength light in front sunlight; the second hole transport layer and the intermediate electrode layer of the crystalline silicon cell are etched by P1 laser to form a plurality of crystalline silicon sub-cells which are connected in parallel, the perovskite cell is used for absorbing long-wavelength light in front sunlight, and the absolute value of the difference between the current density of the perovskite cell and the current density of the crystalline silicon cell is smaller than or equal to a first preset value. According to the laminated battery piece, the current density consistency of the perovskite battery and the crystalline silicon battery in the laminated battery piece is high, the electrical loss can be reduced, and the power generation efficiency can be improved.

The embodiment of the invention provides a simulation evaluation method and device for a multi-satellite cooperative task, and the method comprises the steps: building a unified time-space reference based on a standard time signal, and building a complete environment disturbance model comprising sunlight pressure, atmospheric resistance and geomagnetic field interference. A fault injection mechanism of load, attitude and orbit control is innovatively designed, and real simulation of multi-satellite cooperative motion is realized. According to the system, a system-level, subsystem-level and component-level multi-level evaluation index system is established, a dynamic weight calculation method based on a task execution state is adopted, and matching analysis of a three-dimensional error curve and a key event time sequence is combined, so that accurate evaluation of multi-satellite cooperative task performance is realized; and a reliable decision basis is provided for space task planning and system optimization.

The invention relates to the technical field of photovoltaic power generation, and discloses a photovoltaic module rotary storage light control agricultural support, which comprises a frame mechanism, and is characterized in that the frame mechanism comprises a stand column, a supporting part adaptively mounted on the outer side of the stand column, and a containing part adaptively mounted on the outer side of the supporting part; through mutual cooperation of the supporting component, the containing component, the rotating component and the power component, the position of the photovoltaic panel can be adjusted in good time according to the demand of crops for illumination at different moments, so that the relation between photovoltaic power generation and photosynthesis of the crops is flexibly adjusted and controlled, and the effect of agriculture and light complementation is achieved; the left side and the right side of the photovoltaic panel are both limited, the stability of the photovoltaic panel is improved, the photovoltaic panel can be moved into the containing box in extremely strong wind weather, so that the photovoltaic panel is protected from being damaged, and damage to economic crops under the panel caused by hail, high-temperature sunlight, sudden rainstorm and other natural factors can be prevented through shielding of the photovoltaic panel.

The invention relates to the technical field of satellite orbit prediction, and discloses a satellite orbit prediction method based on a physical information neural network, a terminal and a medium. The method comprises the following steps: constructing a sample set based on satellite position data, sun position data and moon position data in the same time period; constructing a physical information neural network; the network takes satellite historical position data as input to predict a satellite orbit position at a future moment; training a physical information neural network by using the sample set, and executing a satellite orbit prediction task by using the trained physical information neural network; the trained loss function comprises data loss, physical loss and smoothness loss; the data loss is used for measuring the difference between network prediction output and actual observation data; the physical loss is jointly calculated by the earth aspheric perturbation, the three-body gravitational perturbation and the solar light pressure physical perturbation borne by the satellite; the smoothness loss is used for constraining the smoothness of the predicted satellite orbit. According to the invention, the prediction precision and robustness of the satellite orbit are improved.

The invention relates to a method for setting power loss of a mountain photovoltaic array. The method comprises the following steps of: establishing a coupling causal spectrum of multi-source factors including terrain, angle, sunlight, temperature, dust and wiring mode to component output; identifying a dominant loss path based on an identification method of a Bayesian network; outputting a structure weight matrix of the power loss, and identifying an inclination angle gt; a temperature gt; a set of influence factors of the wiring topology pair setting; calculating a power loss response index of each component based on the loss path weight; forming a response index thermodynamic diagram by using a space weight interpolation algorithm, and performing array space sensitive partitioning; the high response area is used as a preferential setting target, and the low response area enters an observation maintenance mechanism; by constructing the response index and the correction response potential function based on multi-factor coupling, the power response potential of the component to the setting operation can be accurately identified, the problems of average adjustment and low-efficiency resource allocation in a traditional setting method are effectively avoided, and it is ensured that setting resources are intensively input into a high-response area.

The invention discloses an old community photovoltaic building integrated reconstruction design method, and particularly relates to the technical field of building reconstruction design, and the method comprises the following steps: firstly, obtaining the three-dimensional structure data of a building through scanning equipment, and determining a suitable photovoltaic installation region based on a preset reconstruction region grade; calculating the bearing capacity of the photovoltaic module according to the transformation area, determining the total weight of the bearable photovoltaic module, and designing the initial distribution of the module; an inclination angle and an azimuth angle of a photovoltaic module are optimized through sunlight analysis, after installation is completed, an inverter is used for converting direct current into alternating current, the alternating current is connected to an intelligent power grid system, finally operation data are collected regularly, and a neural network is used for predicting faults and evaluating a health state. According to the invention, a feasible scheme is provided for large-scale popularization of renewable energy sources, the installation of the photovoltaic system can make full use of the idle space of old buildings, the utilization efficiency of solar energy resources is improved, the dependence on traditional energy sources is reduced, and the energy consumption of old communities is reduced.

The invention discloses a solar flare spectral line inversion method, which belongs to the crossing field of astronomical observation and artificial intelligence, and comprises the following steps: simulating a solar flare event data set according to RADYN, training a constructed full-connection network after preprocessing, carrying out simulation test by using simulated spectral data, carrying out actual test by using actual spectral data in sequence, and obtaining a solar flare spectral line inversion result; according to the solar flare spectrum inversion model, height distribution data of physical parameters can be obtained through inversion according to actually measured spectrum data of a solar flare event, and solar flare spectral line inversion is completed. According to the method, the full-connection neural network is used for inversion of the solar flares, rapid inversion of physical parameters of the solar chromosphere layer can be achieved, data processing time is greatly shortened, meanwhile, high-dimensional spectral data are effectively processed, complex features are automatically learned and extracted, and the nonlinear relation between the spectral data and the physical parameters is captured; and high-precision parameter inversion is realized.

The invention discloses a toilet head product defect automatic detection production line, and relates to the technical field of defect optical detection, the toilet head product defect automatic detection production line comprises a production conveying roller, an optical detection chamber is fixedly connected to the upper end face of the production conveying roller, a power switch is fixedly connected to the side wall of the production conveying roller, and a mounting rack is fixedly connected to the upper end face of the optical detection chamber; the two sides of the optical detection chamber can be intermittently and automatically opened in the closestool product conveying process, the two sides are closed after the closestool product is moved into the optical detection chamber, an external light source is prevented from entering the optical detection chamber, interference of external light rays (such as sunlight and workshop lighting light) can be effectively isolated, and the detection efficiency is improved. The light received by the detection equipment only comes from the detection light source, so that the problem of unstable light intensity is avoided, the accuracy and the reliability of a detection result are improved, the condition of light pollution caused by superposition of an external light source and the detection light source is avoided, and the precision of detecting surface flaws of a closestool product by an optical detection room is improved.

To provide various techniques for preventing a theft of electric cables in a photovoltaic power generation facility.SOLUTION: There is provided a theft prevention system of electric cables in a photovoltaic power generation facility. The theft prevention system includes a power conditioner, a string part, and a processor. The power conditioner includes a resistance measurement part. The resistance measurement part can acquire measurement data. The measurement data is the data indicating a resistance value of a circuit including the string part. The string part includes a plurality of cell parts and is electrically connected to the power conditioner at least via the electric cables. The cell parts can acquire sunlight energy by conversion into a direct current. The processor acquires the measurement data from the resistance measurement part. Data related to a theft of the electric cables is output in response to a change in the resistance value indicated by the measurement data.SELECTED DRAWING: Figure 1

The invention discloses a preparation method of an ultrahigh-reflectivity radiation refrigeration fiber membrane, which comprises the following steps: dissolving a polymer in an organic solvent to prepare an electrostatic spinning precursor solution, and adjusting parameters such as the concentration of the electrostatic spinning precursor solution, spinning voltage, spinning distance, roller rotating speed, liquid supply rate, slide rail reciprocating rate and the like to prepare the ultrahigh-reflectivity radiation refrigeration fiber membrane. And preparing the ultrahigh-reflectivity radiation refrigeration fiber membrane with a porous structure, wherein the reflectivity of the ultrahigh-reflectivity radiation refrigeration fiber membrane is greater than 95% at the sunlight wave band of 0.3-2.5 microns. In the dissolving process of the polymer in the organic solvent, the water bath stirring temperature is 20-60 DEG C, the stirring time is 3-6 hours, a bilateral multi-nozzle opposite layout is adopted in electrostatic spinning, the spinning distance is 15-30 cm, the electrostatic spinning voltage is 20-50 kV, the rotating speed of a roller is 400-1000 r / min, the spinning liquid supply rate is 8-30 ml / h, the reciprocating rate of a sliding rail is 3-10 mm / s, and the thickness of the ultrahigh-reflectivity radiation refrigeration fiber membrane is 300-500 microns. The radiation refrigeration film prepared through the method can be prepared in batches, has good flexibility and can be widely applied to the fields of clothes, buildings, equipment and the like.

The invention belongs to the technical field of seawater desalination, and particularly relates to a solar efficient photo-thermal conversion type floating ball and seawater evaporation application thereof. Specifically, the solar efficient photo-thermal conversion type floating ball comprises a spherical inner core and a photo-thermal conversion material wrapping the spherical inner core, and the density of the spherical inner core is 25-500 kg / m < 3 >; wherein the photo-thermal conversion material is coated at least twice. According to the solar efficient photo-thermal conversion type floating ball, the photo-thermal conversion material is coated at least twice, the loading capacity is improved, meanwhile, a porous network structure is formed, and the seawater evaporation rate can be increased; sunlight irradiates on the floating ball, light energy is converted into heat energy under the action of the surface photo-thermal conversion material, salt is deposited on the floating ball along with water evaporation, and surface salt deposition is automatically and dynamically removed through the free rotating motion of the floating ball on the water surface under the action of centrifugal force and water flow scouring. And self-recovery of the evaporation process and continuous seawater evaporation are realized.

The utility model relates to the technical field of new energy charging piles, and discloses a light storage and charging integrated new energy charging pile which comprises a charging pile body, a top plate is fixedly installed on the top of the charging pile body, a supporting rod is fixedly installed on the top of the top plate, and a cover plate is fixedly installed on the top of the supporting rod. According to the light storage and charging integrated new energy charging pile, the opening and retracting assembly is arranged, after the opening and retracting assembly is used, under mutual matched transmission of a gear, an inner gear ring and a rack, after a servo motor is started, a plurality of photovoltaic panels are driven to move towards the center of the bottom of a cover plate, and the photovoltaic panels can be blocked by the cover plate after moving; according to the charging pile, the photovoltaic panels are prevented from being damaged by severe weather such as accumulated snow and hail, the service life of the photovoltaic panels is prolonged, and in addition, the multiple photovoltaic panels can be driven to move towards the outer side of the cover plate, extend out of the cover plate, receive sunlight and convert solar energy into electric energy to be stored in the charging pile body.

The invention relates to an intelligent photovoltaic power generation control device which integrates a photovoltaic power generation panel, a series connection base, a supporting assembly, a water collection groove, a rainwater collection assembly, a cleaning assembly and a control assembly. A series base and a series interface are arranged below the photovoltaic panel, so that modular installation is facilitated; the supporting assembly comprises two supporting rods, the light following function is achieved, and the photovoltaic panel is automatically adjusted to face the sun. A water collecting groove above the photovoltaic panel and a rainwater collecting assembly at the bottom of the photovoltaic panel can collect and store rainwater; the cleaning assembly comprises a spraying unit and a cleaning brush and is used for automatically cleaning the surface of the photovoltaic panel; the control assembly monitors operation of the system and adjusts the posture of the photovoltaic panel and work of the cleaning assembly. Redundant electricity generated by the photovoltaic power generation panel in sunny days is stored for the system to use, and the light following function is not started in cloudy days, so that electric energy is saved; through the design, the efficiency and sustainability of photovoltaic power generation are improved; the energy conversion efficiency can be improved, the reliability and automation level of the system are enhanced, and the utilization and environmental friendliness of rainwater are improved.

The invention discloses an inter-satellite laser communication sun-sun avoidance test system, which comprises a two-dimensional rotary table used for simulating an in-orbit movement track of a satellite body. And the solar simulation laser is arranged on one side of the two-dimensional turntable and is used for simulating a light source which has similar beam divergence angle and energy with sunlight. And the laser communication terminal is arranged on the two-dimensional turntable and is used for simulating communication equipment to be linked. And the camera is arranged on the laser communication terminal and is used for measuring the included angle of the solar simulation laser relative to the laser communication terminal. The upper computer is respectively connected with the laser communication terminal and the two-dimensional turntable, and is used for providing initial track information for the laser communication terminal and providing corner information for the two-dimensional turntable; and the two-dimensional turntable rotates according to the rotation angle information provided by the upper computer. According to the invention, the reliability of the laser communication terminal for carrying out on-orbit sunshine avoidance is improved.

The invention discloses a photovoltaic auxiliary greenhouse cultivation system which comprises a greenhouse body composed of a framework system and a photovoltaic ceiling, and the photovoltaic ceiling is laid on the top of the framework system, provided with a light splitting type solar thin film cell panel set with adjustable light transmittance and laid in a partitioned mode according to the illumination requirement. The dynamic light compensation system, the temperature balance system and the energy storage system are arranged at the top of the framework system, the energy storage system is used for storing energy and supplying power, the dynamic light compensation system is used for supplementing light for each indoor crop area according to photosynthetically active radiation and sun illumination conditions, and the temperature balance system is used for ventilating and humidifying the greenhouse; and the control machine is arranged on the greenhouse main body and is electrically connected with the dynamic light compensation system, the temperature balance system and the energy storage system so as to receive the monitoring data and control the operation of each electric appliance element. According to the system, lithium battery energy storage and a grid-connected inverter are integrated, the energy self-sufficiency rate is optimized, and the space utilization rate is increased through spectrum customization and three-dimensional planting; the method is suitable for tilled land shortage areas, and gives consideration to clean energy production and agricultural efficient output.

The invention provides an environment-considered photovoltaic panel cleaning scheme determination method, and belongs to the technical field of photovoltaic panel cleaning.The method comprises the steps that firstly, real-time weather data and prediction data are obtained, and an environment stain correlation model is established; a multispectral camera is adopted to identify the types of stains on the surface of the photovoltaic panel and calculate a distribution map; calculating a cleaning index by combining the generating capacity data and the solar irradiation intensity, and determining a cleaning priority; a weather adaptability scoring system is constructed, and a robot operation environment threshold value is set; dividing power generation time periods according to the sunlight intensity and calculating an optimal cleaning time window; cleaning schemes are matched according to different stain types, and parameters are adjusted according to environmental conditions; calling a stain cleaning efficiency optimization function to carry out multi-objective optimization; and finally, generating an optimal cleaning path and parameter configuration by utilizing the photovoltaic cleaning planning network model. The technical problem that a photovoltaic panel cleaning scheme cannot be adaptively optimized according to complex and changeable environmental factors is solved.

The utility model discloses a photovoltaic energy storage fishing boat which comprises a fishing boat body, a storage battery box body is installed inside the fishing boat body, and a rotating disc is installed at the top end of the storage battery box body in a rotating mode. A solar photovoltaic panel is arranged at the top of the rotating disc, hydraulic cylinders are fixedly mounted on the two sides of the top end of the rotating disc, first auxiliary shafts are fixedly mounted on the top ends of the two hydraulic cylinders and the two sides of the middle of the bottom end of the solar photovoltaic panel, and a light sensor senses the illumination angle and transmits a signal to a controller; and then the solar energy is transmitted to the corresponding hydraulic cylinder and the motor through the controller, the motor and the hydraulic cylinder can be driven to operate, so that the effect of changing the deviation angle and the rotation angle of the solar photovoltaic panel is achieved, the solar photovoltaic panel can always face a solar light source by adjusting the angle of the solar photovoltaic panel, and the energy of sunlight is absorbed to the maximum extent. The photovoltaic power generation efficiency can be improved, and a photovoltaic system can generate more electric energy under different weather conditions.

The invention provides a solar frequency division PV / T system coupled with a micro-nano film and a cavity type heat collector. The solar frequency division PV / T system comprises a linear Fresnel lens and the cavity type solar heat collector. A lighting window is formed in the heat collector in the axis direction, a micro-nano frequency division film is arranged on the inner wall face, right facing the lighting window, of a heat absorption cavity, and a concentrating photovoltaic cell is arranged below the micro-nano frequency division film. Sunlight is concentrated to the lighting window through the linear Fresnel lens at the top, is secondarily reflected by the lighting window to be collected to the cylindrical heat absorption cavity of the heat collector and irradiates the micro-nano film at the bottom, the micro-nano film transmits available wave bands in solar spectrum to the photovoltaic cell for power generation, light of other wave bands is reflected to the inner wall face of the heat absorption cavity, and the light of the other wave bands is reflected to the inner wall face of the heat absorption cavity. The heat is absorbed by the heat absorption coating, converted into heat energy and transmitted to the working medium layer, so that gradient utilization of the full spectrum of the sun is realized. The cavity type heat collector structure can effectively reduce energy dissipation caused by radiation and convective heat transfer, and the solar energy utilization efficiency of the system is improved.

The invention relates to a preparation method of a coaxial cellulose-based aerogel fiber fabric for daytime radiation refrigeration, which is characterized in that coaxial fibers take pure cellulose as a core, a skin layer comprises hollow silicon dioxide and low-concentration cellulose, and the hollow silicon dioxide is uniformly dispersed in the cellulose; the preparation method comprises the following specific steps: S1, preparing hollow silicon dioxide with an adjustable particle size; s2, preparing a hollow silicon dioxide / cellulose mixed spinning solution; s3, dissolving cellulose; s4, carrying out coaxial wet spinning; s5, carrying out multi-step solvent replacement; s6, performing continuous normal-pressure drying; s7, weaving fibers; the woven aerogel fiber fabric can effectively scatter sunlight, and the solar reflectivity (gt; 92%), and the emissivity (gt; 96%); the preparation method is green and environment-friendly, the operation is simple, the continuous and large-scale production of the cellulose-based aerogel fiber can be realized, and the prepared coaxial aerogel fiber fabric can show excellent radiation refrigeration performance in the daytime.

The invention relates to the technical field of photovoltaic construction, and discloses an intelligent monitoring device and method for photovoltaic construction, and the device comprises a data collection module which collects the equipment data of a photovoltaic power station in real time; the real-time monitoring module is used for displaying the operation and state of the equipment in the forms of graphs and tables; the remote monitoring module is used for remotely monitoring the overall operation condition; the data storage module is used for storing sunlight amplitude, temperature, wind speed meteorological information and operation parameters of the module; and an early warning module. Through real-time monitoring and early warning, problems can be found and solved in time, system fault time is reduced, power generation efficiency is improved, maintenance cost caused by delayed problem finding is reduced, power station operation cost is reduced, through an intelligent scheduling module, operation and maintenance processes are optimized, operation and maintenance efficiency is improved, manpower resource waste is reduced, and through data analysis and report service, the system can be used for monitoring and early warning in real time. Decision basis is provided for work development of the photovoltaic power station, and the management level is improved.

The invention belongs to the field of nanomaterial piezoelectric-photocatalysis, and relates to preparation and piezoelectric-photocatalysis application of an oxygen vacancy-containing bismuth ferrite nanomaterial. The oxygen vacancy-containing bismuth ferrite nano-material is successfully prepared through a hydrogen calcination method, on one hand, the light absorption range and the light absorption intensity of the bismuth ferrite nano-material are remarkably improved due to the existence of oxygen vacancies, the absorption and utilization efficiency of sunlight is higher, and on the other hand, the oxygen vacancies serve as active sites on the surface of a photocatalyst, so that the photocatalytic activity of the photocatalyst is improved. The activity of the catalyst can be effectively improved, so that the piezoelectric photocatalytic performance is remarkably improved. The efficiency of 2-hour piezoelectric-optical synergistic catalytic degradation of organic pollutants (rhodamine B and tetracycline hydrochloride) is 96.5% and 72.17% respectively, and is 4.1 times and 1.7 times that of a pure-phase bismuth ferrite nano material. Meanwhile, the prepared oxygen vacancy-containing bismuth ferrite has relatively strong magnetism, is convenient to recycle in application, and is strong in operability, simple and convenient in process flow and wide in application prospect.