730results about How to "Improve energy conversion efficiency" patented technology

The invention discloses an optimization control method for a hydrogen fuel cell, and relates to the technical field of cell optimization control. The method comprises the following steps: designing a control algorithm: designing an algorithm according to characteristics and environmental parameters in a starting stage to control gas supply and electric pile preheating so as to realize rapid and stable starting, and monitoring, adjusting and maintaining the optimal working state of the electric pile through a self-adaptive algorithm in steady-state operation, power adjustment achieves accurate power response based on a prediction algorithm in combination with related information planning, a flow is formulated in a closing stage to reduce power, and cooling and purging are started to protect the battery. Rapid starting and efficient energy conversion are achieved through the control algorithm, energy loss is reduced, the operation efficiency is improved, and the energy consumption is reduced. A comprehensive monitoring and fault detection system is established, energy flow is optimized through an intelligent energy management mechanism, reasonable energy distribution under different driving working conditions is achieved, and the overall efficiency of the system is improved.

The invention discloses a control system for a photovoltaic energy storage inverter, and the system comprises a maximum power point tracking module which is used for adjusting the output of a photovoltaic panel after the photovoltaic energy storage inverter receives a power input signal, optimizing the energy collection, a dynamic adjustment module which is used for adjusting the output of the photovoltaic panel based on the power grid fluctuation and load change parameters which are monitored in real time, the control system of the photovoltaic energy storage inverter comprises a control module used for dynamically adjusting the output frequency and voltage of the inverter and achieving efficient conversion and matching of electric energy, and a closed-loop feedback module used for continuously adjusting the output parameters of the inverter until the output parameters reach a preset energy conversion efficiency threshold value. The system is ensured to be always in an optimal operation state, and unpredictable factor changes are accurately and intelligently adapted, so that the overall conversion efficiency of the photovoltaic energy storage system is improved.

The invention discloses a supercritical carbon dioxide energy storage system and method based on porous liquid absorption and storage, and belongs to the technical field of energy storage industry. Comprising a low-pressure storage system for storing low-pressure carbon dioxide; the compression energy storage system is used for compressing the carbon dioxide energy storage working medium; the high-pressure storage system is used for obtaining and storing high-pressure supercritical carbon dioxide; the expansion energy release system is used for high-pressure supercritical expansion energy release and pushing a power generator to generate power; and the heat circulation system exchanges heat with and circulates heat with the compression energy storage system and the expansion energy release system. A porous liquid absorbent is adopted. Permanent gaps for containing carbon dioxide can be provided, the problem of a carbon dioxide low-pressure storage end can be solved, and the system investment cost is greatly reduced. High-density storage of the low-voltage end of carbon dioxide is achieved through a chemical absorption method, the supercritical carbon dioxide compression energy storage system stores excess electric quantity generated by the renewable energy system, expansion power generation is carried out in the power utilization peak, and the peak regulation capacity of a power grid is improved.

The invention discloses a double-channel hydrogen production system optimization control method for a multi-power-supply scene, and the method comprises the steps: constructing a double-channel hydrogen production system, and obtaining corresponding operation data; decomposing and reconstructing based on the operation data to obtain the initial input power of the electrolytic cell; formulating a start-stop rule of the electrolytic cell based on the initial input power; correcting the initial input power based on a start-stop rule to obtain actual hydrogen production power; an electrolytic cell mathematical model is constructed, and the unit hydrogen production cost and the energy conversion efficiency are obtained based on the actual hydrogen production power; establishing a target function based on the unit hydrogen production cost and the energy conversion efficiency; and optimizing the target function based on a multi-target particle swarm algorithm to obtain an optimal filtering reconstruction order and an electrolytic cell retention ratio, and completing power distribution and optimal capacity configuration of the double-channel hydrogen production system. Power division and capacity configuration of the alkaline electrolytic bath and the PEM electrolytic bath are achieved, the hydrogen production cost of the wind-solar coupled system is effectively reduced, and the energy conversion efficiency of the electrolytic bath is improved.

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 a data-driven floating type wind turbine generator model-free control method and system, and the method comprises the steps: obtaining the operation state and external environment parameters of a wind turbine generator, and constructing sample data; inputting the sample data into a pre-trained controller, and outputting a control instruction to control the wind turbine generator; the specific process of obtaining the controller comprises the steps that the simulation operation state / historical operation state and external environment parameters of the wind turbine generator are obtained, and an initial controller is constructed based on the simulation operation state / historical operation state and the external environment parameters; determining a control target, a wind turbine generator operating environment, an intelligent agent, a state space, an action space, a constraint condition and a reward function in the initial controller; and performing continuous interactive learning training on the intelligent agent and the operation environment of the wind turbine generator through a deep reinforcement learning algorithm to obtain a trained controller. The method has the advantages of reducing the modeling difficulty, dynamically correcting the control strategy, improving the power generation efficiency and the like.

The invention relates to the technical field of fuel cells, and discloses a vehicle hybrid power system and an energy management method thereof, a medium and a vehicle, the vehicle hybrid power system is composed of a fuel cell and a power cell, the fuel cell and the power cell simultaneously generate electric energy to drive a motor, and the power cell plays a role in supplementing and recycling the electric energy. According to the method, the fuel cell works in a high-efficiency interval and a long-life interval as much as possible, multi-target optimization is performed on the efficiency and the life of the fuel cell based on a multi-target particle swarm optimization algorithm, and the fuel cell works at a high-efficiency and long-life comprehensive optimization working point.

The invention provides a perovskite-crystalline silicon laminated cell, which comprises a heterogeneous crystalline silicon cell, a tunnel junction, a conductive layer, a first carrier transport layer, a perovskite light absorption layer, a second carrier transport layer and a transparent electrode layer which are sequentially laminated, wherein the first carrier transport layer comprises a dendritic structure facing and extending into the perovskite light absorption layer, and the length of the dendritic structure is smaller than the thickness of the perovskite light absorption layer. According to the perovskite-crystalline silicon laminated cell provided by the invention, through the arrangement of the dendritic structure with a relatively good capillary effect in the first carrier transport layer, a high-quality perovskite absorption layer can be formed, so that the energy conversion efficiency of the perovskite-crystalline silicon laminated solar cell is greatly improved.

The invention relates to the field of manufacturing of sensitive elements and sensors in the electronic core industry, in particular to a piezoelectric MEMS acoustic device and a manufacturing method thereof. The device structurally comprises a substrate, an insulating layer, a silicon substrate, a multi-layer composite film structure and a protective layer from bottom to top in sequence, wherein the multi-layer composite film structure is formed by alternately growing electrode layers and piezoelectric layers, and the first layer and the last layer of the multi-layer composite film are the electrode layers; a bonding pad is arranged on the multi-layer composite film structure; the protective layer covers the upper surface of the device; a suspended back cavity structure is arranged between the substrate and the insulating layer; the silicon substrate, the multi-layer composite film structure and the protective layer are connected through an opening communicated with the back cavity; according to the device provided by the invention, the volume of the piezoelectric material is increased mainly by adding the piezoelectric layer, and the energy conversion efficiency of the structure is effectively improved, so that the sensitivity of the transducer is improved.

The invention relates to the technical field of battery management, in particular to a decommissioned battery active equalization method and online detection device based on a direct current converter and time division multiplexing, and the method comprises the following steps: S1, collecting the health state, capacity and historical use data of a main control chip and a sensor; s2, classifying the battery pack through a preset classification algorithm; s3, dynamically adjusting voltage output; s4, adjusting parameters of the switching network based on the voltage in the S3; s5, short pulse current is applied to the battery pack, and current flowing in the equalization process is controlled; s6, automatically adjusting the working parameters of the DC converter and the configuration of the switching network; and S7, automatically adjusting the parameters in the steps S3 to S6 according to an evaluation result. According to the invention, by implementing the active pulse modulation technology and real-time battery health monitoring, the energy efficiency and safety of the retired battery in secondary utilization are remarkably improved, and meanwhile, the battery maintenance is optimized and the service life of the battery is prolonged through the intelligent management system.

The invention provides perovskite ink, a preparation method thereof and a perovskite solar cell. The perovskite ink comprises a precursor solution A and a precursor solution B. The precursor solution A comprises a solute A and a solvent A, the precursor solution B comprises a solute B and a solvent B, the solute A comprises at least one of halogenated methylamine, halogenated formamidine, cesium halide and lead halide, and the solute B comprises at least one of cesium halide, lead halide and halogenated methylamine. The perovskite thin film prepared by using the perovskite ink is higher in crystallinity, larger in grain size after annealing and free of pinholes, and the energy conversion efficiency of the prepared perovskite solar cell is higher than that of a traditional DMF + DMSO solvent system. The invention also provides a preparation method of the perovskite ink and a perovskite solar cell.

The invention discloses a metal material performance detection method based on longitudinal wave resonance, metal material performance detection is carried out based on a laser and a metal material performance detection sensor, and the metal material performance detection sensor comprises an electromagnetic ultrasonic transducer EMAT and a magnetism gathering ring; the method comprises the steps that EMAT and a magnetism gathering ring are arranged on the two sides of a metal material sample respectively; laser emitted by the laser device penetrates through the magnetism gathering ring and the liquid-solid mixed material covering the surface of the metal material sample to generate an ultrasonic resonance signal in the metal material sample, the ultrasonic resonance signal is finally received by the EMAT, and the performance of the metal material sample is detected based on the ultrasonic resonance signal received by the EMAT. The detection effect of the performance of the metal material can be improved.

The invention relates to a laser wireless energy and signal synchronous transmission system, in particular to a laser wireless energy and signal synchronous transmission system for a rotary motion mechanism, which is used for solving the defect that the existing SLWPIT technology still has more limitations in the application of a rotary mechanism although the existing SLWPIT technology meets the requirement of long-distance transmission to a certain extent. The laser wireless energy and signal synchronous transmission system for the rotary motion mechanism comprises a stator part and a rotor part, and considers that an all-optical link realizes laser wireless energy and signal synchronous transmission in a rotary state from the system level, so that stable energy transmission efficiency can be kept in the rotary state; the system has good anti-electromagnetic interference capability and strong environmental adaptability.

The invention discloses a magnetostrictive electromagnetic ultrasonic transducer for a pipeline and a detection device and method, and relates to the field of electromagnetic ultrasonic nondestructive detection, and the electromagnetic ultrasonic transducer comprises a magnetostrictive strip arranged on the outer surface of a to-be-detected pipeline, an eddy current coil and a plurality of excitation coil units; the eddy current coil is wound on the outer surface of the magnetostriction strip in the circumferential direction; the eddy current coil can be used as an excitation end and receiving end eddy current coil, an excitation end eddy current coil or a receiving end eddy current coil; the excitation coil units are distributed on the magnetostrictive strip at intervals; the magnet exciting coil of each magnet exciting coil unit is wound on the wall surface of the magnetostrictive strip along the axial direction; a magnet exciting coil of the magnet exciting coil unit provides a bias magnetic field for the magnetostrictive strip. The magnet exciting coil is adopted to replace a permanent magnet, so that the heat resistance of the electromagnetic ultrasonic transducer is improved; the sparse excitation coil increases the contact area between the magnetostriction strip and the pipeline to be detected, and the energy efficiency of the electromagnetic ultrasonic sensor is improved.

The invention relates to the technical field of power supply control, in particular to a power supply control device and a power supply control method and system. The method comprises the following steps: acquiring electromagnetic compatibility parameter data of a power supply device; performing simulation analysis on an electromagnetic environment in the power supply device according to the electromagnetic compatibility parameter data, and predicting high-frequency harmonic waves and electromagnetic interference in a switching process to obtain electromagnetic interference prediction data; performing control design on the soft switch according to the electromagnetic interference prediction data, and generating soft switch control scheme data; switching operation is carried out in the state that the voltage of a switch element is close to zero based on the soft switching control scheme data, current and voltage waveform smooth optimization design is carried out on a resonance circuit, and optimized topological structure data is generated. According to the invention, the overall performance and reliability of the power supply system are significantly improved by improving the electromagnetic compatibility, reducing the switching loss, optimizing the design, monitoring in real time, dynamically adjusting and the like, and the higher requirements of modern electronic equipment on the power supply system are met.

The invention belongs to the technical field of compressed air energy storage, and discloses a salt cavern compressed air energy storage reservoir stability grade evaluation method and system, and the method comprises the steps: obtaining salt rock physical and mechanical parameters, stratum structure parameters and salt cavern internal structure parameters; selecting a stability evaluation index of the salt-cavern compressed air energy storage library; establishing a three-dimensional geomechanical model of the salt cavern energy storage library and performing simulation calculation; constructing an evaluation model; determining an index weight value of the stability of the salt-cavern compressed air energy storage library; calculating an evaluation grade; and adjusting and optimizing operation parameters of the salt cavern energy storage bank. According to the method, by providing a systematic quantitative analysis process and a unified evaluation index system, the accuracy and reliability of stability evaluation of the salt-cavern compressed air energy storage library are remarkably improved, and an important technical support is provided for development and application of a salt-cavern compressed air energy storage technology. Important technical support is provided for development and application of a salt cavern compressed air energy storage technology, and commercialization and large-scale development of the technology can be promoted.

The invention discloses a self-adaptive working condition request power control method, device and equipment, and relates to the field of battery energy management, the method comprises the following steps: controlling a fuel cell system controller to successfully start an electric pile, and entering a fuel-electricity mode; the working condition of the whole vehicle is judged according to the running state of the whole vehicle entering the gas-electricity mode; and outputting request power corresponding to the working condition of the whole vehicle according to the power control strategy corresponding to the working condition of the whole vehicle. The method aims to solve the problems of frequent output power change and poor output efficiency due to repeated high-power charging and discharging of a power battery in the existing method. According to the method, repeated high-power charging and discharging of the power battery can be avoided, the energy conversion efficiency of the power battery is improved, the whole vehicle request power is stable and small in fluctuation change, and the working efficiency, reliability and service life of a fuel battery system can be improved.

The invention relates to the technical field of perovskite solar cell preparation, in particular to a bulk phase passivation perovskite light absorption layer, a solar cell and a preparation method, the bulk phase passivation perovskite light absorption layer is prepared by adopting a perovskite layer prefabricated liquid, the perovskite layer prefabricated liquid comprises (FA 0.95 MA0.05) 0.95 Cs0.05 Pb (I 0.95 Br0.05) 3 and m-F-PEACl, the molar concentration ratio of the (FA 0.95 MA0.05) 0.95 Cs0.05 Pb (I 0.95 Br0.05) 3 to the m-F-PEACl is 1.5: (0.1-1), m-F-PEACl and (FA < 0.95 > MA0. 05) < 0.95 > Cs0. 05Pb (I < 0.95 > Br0. 05) 3 are matched to form a bulk phase passivated perovskite layer, so that organic cations in the m-F-PEACl interact with uncoordinated lead ions or other defect sites in the (FA < 0.95 > MA0. 05) < 0.95 > Cs0. 05Pb (I < 0.95 > Br0. 05) 3 to form a stable complex or compound, the defect concentration in perovskite is reduced, comprehensive and effective passivation is realized, and the performance of the perovskite is improved. Therefore, the photoelectric property and the stability of the perovskite material are improved. The problem that comprehensive and effective passivation cannot be achieved through a perovskite thin film passivation method in the prior art is solved.

The invention provides a gas-solid fluidized bed reactor and method for photo-thermal coupling catalysis of CO2 reduction. The gas-solid fluidized bed reactor comprises a reactor main body, a gas inlet base and a heating part, a reaction cavity in the reactor main body is an inverted circular truncated cone-shaped cavity, and a quartz light window is arranged at the top of the reaction cavity; a columnar gas channel is arranged in the gas inlet base; the bottom of the reactor main body is connected with the top of the air inlet base, and a porous sieve plate is arranged between the reactor main body and the air inlet base; the bottom of the inverted circular truncated cone-shaped cavity is communicated with the top of the columnar gas channel through a porous sieve plate; the heating part is used for providing heat for the reactor main body and the air inlet base. According to the photo-thermal reactor, light blocking caused by catalyst accumulation of a traditional photo-thermal reactor is reduced, the contact area of reactant gas and the catalyst is effectively increased, and the efficiency of the catalyst is fully exerted.

The invention relates to an identification method, in particular to a photovoltaic panel dust deposition detection and pollutant identification method based on an unmanned aerial vehicle-mounted hyperspectrum. The method comprises the following steps: collecting spectral data; preprocessing the spectral data; extracting effective spectral features; change detection; judging whether pollutants exist or not; carrying out pollutant comparison; and evaluating ash deposition and giving an alarm. According to the invention, through combination of hyperspectral imaging and spectral variation analysis, automatic and non-contact monitoring of the accumulated dust and pollutants on the photovoltaic panel is realized, and tiny spectral change on the surface of the photovoltaic panel can be captured in real time and with high precision, so that the degree and the type of the accumulated dust and pollutants are accurately detected, the detection precision and the real-time performance are improved, and the detection efficiency is improved. And the maintenance cost is effectively reduced, unnecessary cleaning operation is avoided, and maintenance suggestions can be provided in time according to the detection result, so that the energy conversion efficiency of the photovoltaic panel is further improved.

The invention discloses a compressed air energy storage system and a control method thereof, and relates to the technical field of compressed air energy storage, the system comprises a control module, an information detection module, an adjusting module, a gas storage and a compressor module; the control module is used for collecting initial operation parameters of the compressed air energy storage system through the information detection module when the compressed air energy storage system operates, determining a to-be-adjusted module and target operation parameters of the compressed air energy storage system according to the initial operation parameters, and controlling the to-be-adjusted module to operate based on the target operation parameters; the initial operation parameters comprise the environment temperature of the compressed air energy storage system, the gas storage temperature of the gas storage and the gas storage pressure, the to-be-adjusted module comprises a compressor module and an adjusting module, and the target operation parameters are used for reducing the energy loss of the compressed air energy storage system. The operation parameters of the devices in the system can be adjusted according to the operation information of the energy storage system, so that the energy conversion efficiency of the system is improved.

The invention provides a methanol preheating and catalytic cracking system for a methanol engine, a ship and a control method, and belongs to the technical field of ship methanol engines. The problems that an existing methanol engine is difficult in cold start and methanol gasification are solved. The system comprises a methanol engine, a methanol storage tank, a water storage tank, a heat exchanger, an inlet temperature sensor and an outlet temperature sensor, one passage of a third three-way valve is connected with the waste gas output end of the methanol engine, the other passage of the third three-way valve is connected with another cooling water pipeline, and the methanol output end of the heat exchanger is connected with the methanol input end of the methanol engine. The methanol input end is connected with the methanol storage tank, a methanol pump is arranged on a methanol conveying pipeline between the methanol storage tank and the heat exchanger, two passages of the first three-way valve are arranged between the methanol conveying pipelines, and the inlet temperature sensor and the outlet temperature sensor are respectively arranged at a methanol inlet and a methanol outlet of the heat exchanger. The method is mainly used for starting the methanol engine.

The invention provides an offshore floating normal-pressure hydrogen storage photovoltaic power generation method, which adopts a normal-pressure hydrogen bag to store hydrogen, and the normal-pressure hydrogen bag is arranged below a photovoltaic cell panel or on an idle sea surface beside the photovoltaic cell panel; the hydrogen preparation device is communicated with the normal-pressure hydrogen bag and the hydrogen fuel power generation device through a hydrogen pipeline, photovoltaic electric energy is gathered through a photovoltaic wire, and then the electric energy is converted into hydrogen for normal-pressure storage. According to the invention, the continuity and stability of power supply can be ensured, and a new low-cost technical path can be provided for replacing thermal power by photovoltaic power generation.

The invention belongs to the technical field of agricultural light supplement, and particularly relates to an agricultural light supplement lamp system and method based on optical fiber transmission and fluorescence conversion. Efficient light distribution from a single light source to multiple application terminals is achieved, and the proportion of blue light to red light can be flexibly adjusted according to the photosynthesis requirements of crops. In addition, the optical shaping system arranged behind the application tail end ensures that the light can be accurately irradiated on the target crop, so that the light utilization rate and the energy conversion efficiency are greatly improved. Through the technical innovation, the wiring design is simplified, the complexity and the cost of the system are reduced, and the effectiveness of photosynthesis and the growth quality of crops are remarkably improved.

The invention discloses a large-diameter direct-drive permanent magnet synchronous double lock catch and an assembling method thereof, the large-diameter direct-drive permanent magnet synchronous double lock catch comprises a rotor hub, the periphery of the rotor hub is correspondingly and sequentially wound with a plurality of punching sheet magnetic isolation fixing blocks, a clamping groove is correspondingly formed between the tops of every two adjacent punching sheet magnetic isolation fixing blocks, a punching sheet is correspondingly arranged in each clamping groove, and the punching sheet magnetic isolation fixing blocks are arranged in the clamping grooves. A placing groove is correspondingly formed between every two adjacent punching sheets, and magnetic steel is correspondingly arranged in the placing grooves. An iron core of an original integrated rotor punching sheet is split into a single-tooth structure and is divided into the punching sheets and the punching sheet magnetic isolation fixing blocks, the punching sheets and the punching sheet magnetic isolation fixing blocks are distributed and installed respectively, installation is convenient, and meanwhile the operation difficulty of the technology is greatly reduced.

The invention discloses an integrated heat exchanger which is applied to a launching device, the launching device comprises a launching cylinder, the heat exchanger comprises a plurality of heat exchange pipes, and the heat exchange pipes are distributed in the cylinder wall of the launching cylinder in the circumferential direction; the heat exchange tube comprises a condensation section, a heat insulation section and an evaporation section which are sequentially connected to form a closed tube cavity, and the tube diameter of the closed tube cavity is gradually reduced in the direction from the condensation section to the evaporation section; a liquid absorbing core is arranged on the inner wall of the closed pipe cavity, a working medium capable of conducting phase change between the gas state and the liquid state is contained in the closed pipe cavity, and the liquid absorbing core can absorb the liquid working medium and guide the liquid working medium to flow from the condensation section to the evaporation section. The heat generated by the unmanned aerial vehicle at the front part of the transmitting tube due to friction can be collected and used for heating the cavity at the tail part of the transmitting tube, so that carbon dioxide is prevented from desublimating into a solid, the temperature of the transmitting tube is balanced, and the structural integrity of the transmitting tube is ensured. The invention further provides a parameter determination method, a starting transmitting device, electronic equipment and a computer readable storage medium.

The present application provides a photovoltaic storage and hydrogen sharing system and photovoltaic storage and sharing device, in which photovoltaic panels are installed on or next to the atmospheric pressure hydrogen tank, and the photovoltaic panels and the atmospheric pressure hydrogen tank constitute a photovoltaic storage and sharing device with complementary functions and integration; when there is sufficient sunlight, the photovoltaic panels supply power to the hydrogen generator to produce hydrogen, and the hydrogen is stored in the atmospheric pressure hydrogen tank; when there is no sunlight, the hydrogen fuel cell receives hydrogen to generate electricity. The present application reduces the energy storage cost of the entire life cycle, opens up a new low-cost technical path for photovoltaic power generation to replace thermal power, and provides a possibility for hydrogen to replace biogas.

The invention discloses a system and a method for co-producing graphite carbon and hydrogen through biomass two-stage pyrolysis, and belongs to the technical field of biomass pyrolysis. The system comprises a low-temperature pyrolysis module and a continuous Joule thermal pyrolysis module. The Joule pyrolysis reactor is designed into a wheel disc type, so that biomass pyrolysis reactions can be linked into a whole, the reactions are continuously carried out, the starting and stopping time of a pyrolysis module is shortened, the economical efficiency of the whole system is improved, and graphite carbon and hydrogen are more efficiently obtained. By utilizing the system, firstly, biomass is subjected to low-temperature pyrolysis and condensation to obtain pyrolytic carbon and bio-oil, then the pyrolytic carbon is subjected to Joule thermal pyrolysis, condensation and purification to obtain graphite carbon, bio-oil and hydrogen-rich synthesis gas, the low-cost biomass is used as a raw material to prepare graphite carbon and hydrogen, and fossil resources used in traditional graphite carbon preparation are saved. The system can be better used for industrial production, and co-production of graphite carbon and hydrogen is achieved.

The invention provides a novel renewable energy hydrogen energy storage system and an operation method thereof. The hydrogen energy storage system comprises an energy storage cycle unit, an energy release cycle unit, a heat energy utilization unit and the like. The energy storage cycle and the energy release cycle of the system are mutually independent loops, the fuel cell and the gas turbine are utilized in the hydrogen energy storage system to supplement the generating capacity, cooling water is used as a heat exchange medium, heat generated in the operation process of the system is stored, and the energy storage cycle and the energy release cycle of the system are mutually independent loops. And the working capacity of high-pressure hydrogen in front of the expansion machine is improved by utilizing tail gas of the gas turbine and hot water generated by utilizing waste heat of equipment, and consumed power in the hydrogen compression process is recycled by utilizing the hydrogen expansion machine. According to the hydrogen energy storage system, conversion of electric energy, hydrogen energy and heat energy is achieved through multi-stage recovery and utilization of heat energy, the working state of the valve can be adjusted according to the load requirement of a power grid, the operation methods of the hydrogen fuel cell and the gas turbine are switched, and the response flexibility, the energy release power density and the energy circulation efficiency of the system are improved.

The invention provides an X-ray photovoltaic radiation cell based on a gallium-containing semiconductor and a preparation method of the X-ray photovoltaic radiation cell. The gallium-containing semiconductor X-ray radiation photovoltaic cell comprises a gallium-containing semiconductor transduction unit and an X-ray radiation source 55Fe arranged on the semiconductor transduction unit, wherein the semiconductor transduction unit containing gallium comprises at least one of GaAs (gallium arsenide), GaInP (gallium indium phosphide), GaP (gallium phosphide) and Ga2O3 (gallium trioxide). According to the invention, the structure of a radiation photovoltaic cell is adopted, the output power density of an X-ray radioactive source 55Fe can be effectively improved, the penetration depth of the X-ray source 55Fe in a semiconductor can be effectively shortened by taking GaAs, GaInP, GaP and Ga2O3 as semiconductor materials, and meanwhile, the collection capability of current carriers is effectively improved by adjusting the total thickness of a semiconductor transduction unit and the doping concentration of each layer, so that the performance of the X-ray source 55Fe is improved. And finally, the preparation of the X-ray radiation photovoltaic cell with high output power and high energy conversion efficiency is realized.