20results about How to "Improve output power density" patented technology

The invention discloses an elliptical wave-shaped runner structure of a solid oxide fuel cell and an optimization method of the elliptical wave-shaped runner structure, the runner structure comprises a cathode connecting piece, a single cell and an anode connecting piece which are sequentially arranged from top to bottom, the cathode connecting piece is connected with the single cell to form a cathode runner, and the anode connecting piece is connected with the single cell to form an anode runner; the anode connecting piece is connected with the single battery to form an anode flow channel; projections of the cathode flow channels and the anode flow channels on the surfaces of the single cells are rectangular; and the surfaces of one sides, far away from the single cells, of the cathode flow channels and the surfaces of one sides, far away from the single cells, of the anode flow channels are wavy concave-convex curved surfaces. The flow channel structure disclosed by the invention can reduce the pressure drop of the flow channel, improve the non-uniform distribution of gas in the flow channel, improve the mass transfer efficiency, promote heat exchange and improve the performance of the battery.

The invention discloses a large-torque magnetorheological brake based on a magnetorheological fluid internal circulation mode, and relates to the field of brakes, the large-torque magnetorheological brake comprises a shell, a left end cover, a right end cover, a main shaft and a rotating cylinder; a brake disc assembly is arranged on the rotating cylinder and comprises an end brake disc arranged at the position, close to the left end cover, of the rotating cylinder and a plurality of conventional brake discs arranged on the rotating cylinder at uniform intervals. A reel assembly is arranged on the periphery of the brake disc assembly in the shell, and a magnet exciting coil used for generating an exciting magnetic field is arranged on the reel assembly; an impeller is arranged on the main shaft, the impeller can move between the left end cover and the end brake disc, the impeller and the end brake disc are elastically connected, and the impeller can be attracted by electromagnetic force to move towards the end brake disc and rotate in cooperation with the end brake disc; the rotating impeller drives the magnetorheological fluid to circularly flow to a certain extent in the brake, and meanwhile the damping torque generated in the rotating process of the impeller can improve the braking torque of a system.

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.

The invention belongs to the technical field of micro electro mechanical system manufacturing and ocean current energy collection, and particularly relates to a dual-drive ultra-low-speed ocean current energy harvesting device which solves the problems that an existing ocean current energy collecting device is large in overall size, more depends on other forms of ocean energy such as wave energy, cannot collect low-frequency and low-speed ocean current energy in a compatible mode, and is poor in energy efficiency. The energy harvesting device comprises an internal energy harvesting structure, an external energy harvesting structure, a barrel-shaped shell and a top cover, the internal energy harvesting structure comprises a bevel gear wheel, a left bevel pinion, a right bevel pinion, a conductive slip ring, a left copper ring, a right copper ring and a semiconductor wafer; the external energy harvesting structure comprises a left turbine blade, a right turbine blade and a bottom turbine blade. Direct current is generated through friction between the conductive copper ring and the semiconductor, resistance in the friction process can be remarkably reduced, the output power density is improved, and high reliability and long endurance are achieved. The two turbine blades are adopted to adapt to different flow velocity changes, and the flexibility of energy collection is improved.

The application provides a medium-high temperature p-type ZrNiSn-based half-Hasler thermoelectric material, a preparation method and application thereof. x Y x Zr 1‑2x NiSn, wherein x is a molar ratio, and the value range of x is 0.2-0.35. The medium-high temperature p-type ZrNiSn-based half-Hasler thermoelectric material provided by the application changes the majority carriers from electrons to holes, significantly reduces the lattice thermal conductivity, and obtains the p-type ZrNiSn-based thermoelectric material, thereby laying a foundation for developing high-power thermoelectric devices with matching n-type and p-type legs. The application has good application prospect and large-scale popularization potential in the fields of distributed low-grade waste heat recovery power generation and the like.

The present invention discloses a piezoelectric power generation system for capturing wave energy, comprising a piezoelectric power generation device, a float, a column and a base, wherein the piezoelectric power generation device comprises an outer ring, an inner ring and a piezoelectric power generation group, wherein the float is connected to the inner ring through the rocker, and the outer ring is connected to the base through the column. The float of the system transmits low-frequency vibration (originating from waves) to the piezoelectric power generation device through the rocker, and the piezoelectric power generation device uses the cooperation of multiple groups of piezoelectric components on the inner ring and multiple groups of magnets on the outer ring to realize high-frequency vibration power generation of the piezoelectric components, so as to improve the power generation efficiency.

The application discloses an energy storage device based on reverse electrodialysis technology, and designs the structure of the energy storage device, so that the transmission ions can be transmitted in the first structure and the second structure to form an internal loop; meanwhile, due to the existence of oxidizing substances and reducing substances, when the oxidizing substances undergo reduction reactions and the reducing substances undergo oxidation reactions, an oxidation-reduction potential difference can be formed; since the oxidation reactions and the reduction reactions continuously proceed, the oxidation-reduction potential difference can be continuously provided, and when an electric signal is outputted based on at least the oxidation-reduction potential difference, the electric signal can be continuously outputted at a high level, so that the energy storage device has a high output power density and good output stability.

The invention discloses an electrocatalyst, preparation and application thereof, and a biomass derived aldehyde fuel cell for co-production of electric energy and hydrogen. The invention particularly relates to preparation of an electrocatalyst for efficiently catalyzing oxidation of aldehyde groups to produce hydrogen and construction of a biomass derived aldehyde fuel cell capable of synchronously producing electric energy and hydrogen. The battery realizes higher output power density (173.5 mW / cm < 2 >), higher Faraday efficiency (close to 100%) and higher hydrogen production rate (1.96 mmol / cm < 2 > / h) at room temperature, and is at a leading level in the existing research. Besides, during power generation, biomass derived aldehyde of the anode is oxidized into corresponding carboxylic acid compounds, the process is carried out at room temperature and normal pressure, the reaction is flexible and controllable, and compared with a traditional aldehyde oxidation technology, the method has higher safety and economical efficiency. The method has a wide application prospect in the fields of power generation, hydrogen production, biomass conversion and the like.

The invention provides an MXene / semiconductor-based heterogeneous thin film and a preparation method thereof, and a salinity gradient energy recovery power generation device, the heterogeneous thin film comprises a semiconductor layer and an MXene layer which are stacked and connected together, and the semiconductor layer is formed by stacking n-type semiconductor nanosheets. According to the heterogeneous thin film, the photothermal effect of an MXene material and the photoelectric effect of a semiconductor-metal heterojunction can be utilized to promote ion transmission, and the recovery performance of salinity gradient energy is improved; when the MXene / semiconductor-based heterogeneous thin film is used as a semipermeable film, positive ions in a high-salinity solution pass through the heterogeneous thin film under the pushing of salinity difference and migrate into a low-salinity solution so as to form internal current.

The utility model relates to the technical field of semiconductor high-heat-dissipation chip packaging, in particular to a no-pin high-voltage high-heat-dissipation product frame design structure, which structurally comprises a frame body, a frame base island and a chip, a plurality of product pins are arranged at the edge of the frame body, the frame base island is connected with the frame body through a base island connecting rib, and the chip is connected with the frame body. A plurality of through holes are formed in the edge of the frame base island, the chip is arranged on a chip area of the frame base island, the cooling fins are arranged on the bottom face of the chip through chip bonding glue, the product pins are connected with the plastic package body in a reflow soldering paste mode, solder paste forms solder balls on the surface of the plastic package body, and the solder balls are used for outputting product signals. The surface exposing the solder balls is the bottom surface of the product, and the cooling fin is located on the top surface of the product. According to the utility model, the radiating fins are arranged on the front surface of the product, so that the heat of the chip is output from the front surface of the product, the product can quickly transfer the heat at the application end, the product performance is stabilized, and the use standard of customers is met.

The present invention relates to a semiconductor composite material and a preparation method and device thereof, belonging to the field of semiconductor technology, and is used to solve at least one of the problems of low heat dissipation efficiency in the near-junction region of existing GaN devices and high interface thermal resistance caused by wafer bonding. The present invention designs a semiconductor composite material with a new structure, wherein the composite material connects a beveled substrate layer and a GaN material layer by wafer bonding, avoiding the introduction of a buffer layer structure, and an angle exists between the beveled substrate layer and the substrate material axis to form a beveled substrate layer with a turning angle. The beveled substrate layer with a turning angle and the GaN material layer are bonded by wafer, which can reduce the interface thermal resistance of the bonding interface after wafer bonding, and can effectively improve the heat dissipation efficiency of GaN high-power devices, thereby improving their output power density.

The invention discloses a three-core cable space magnetic field energy collection system and a design method. The system comprises a three-core cable, an energy taking coil, a notch annular magnetic core, a compensation network, a rectifier bridge and a load. The method comprises the following specific steps: constructing a three-core cable space magnetic field energy collection model; on the basis of finite element simulation fitting, determining a function model in which the effective magnetic conductivity of the notch arc-shaped magnetic core is associated with magnetic core structure parameters and a mathematical model in which the coil internal resistance is quantized by the side length of a central magnetic column; solving the output power; establishing an output power density description model of the three-core cable space magnetic field energy collection system; and performing model description and derivation on the power density to obtain the optimal side length of the central magnetic column. Theoretical calculation and simulation are combined to verify that the optimal magnetic column side length exists under limited volume and limited parameters, so that the output power density of the system is maximum, the output power density of the three-core cable space magnetic field energy taking system is effectively improved, and the purpose of solving the self-power supply problem of the three-core cable state monitoring sensor is achieved.

The utility model discloses a critical space laser ranging device, including laser emission module and receiving module, laser emission module includes laser, emission lens barrel and emission collimating optical system, and the laser is fixed at the back end of emission lens barrel, and emission collimating optical system is located in emission lens barrel, and emission collimating optical system includes first double concave lens, first double convex lens, second double concave lens and second double convex lens, receiving module includes receiving lens barrel, focusing system and detector, and focusing system is located in receiving lens barrel, and focusing system includes third double convex lens, first meniscus and second meniscus, and the detector is fixed at the back end of receiving lens barrel. The utility model improves laser emitter's output power density and beam quality, realizes the spatial concentrated distribution of energy through the divergence angle of emission beam is suppressed, and the focusing characteristic of echo beam is optimized simultaneously, improves the optical coupling efficiency, thereby enhances the signal to noise ratio of detector receiving signal.

The invention relates to the technical field of low-grade energy, in particular to a combined heat and power system and method for coupling a geothermal source absorption heat pump with an organic Rankine cycle. Comprising a heat pump cycle unit and an organic Rankine cycle unit which are connected. The heat pump cycle unit comprises a generator, a heat pump condenser, a heat pump evaporator, an absorber and a heat pump regenerator, efficient utilization of medium and low temperature geothermal resources is achieved by coupling heat pump cycle and organic Rankine cycle, and the system has the advantages of being simple in structure, high in operation and adjustment flexibility, capable of promoting new energy consumption, safe, stable, high in efficiency and the like. And the method has important significance on utilization of medium and low temperature geothermal resources and other low-grade waste heat.

The invention provides a thermal rechargeable battery based on an anion exchange membrane and a preparation method of the thermal rechargeable battery, and belongs to the technical field of thermoelectric batteries. The thermal rechargeable battery comprises an anion exchange membrane, an n-type aqueous electrolyte and a P-type aqueous electrolyte, an n-type aqueous electrolyte is arranged on one side of the anion exchange membrane, and a P-type aqueous electrolyte is arranged on the other side of the anion exchange membrane; the electrolyte of the n-type aqueous electrolyte is FeCl3; the electrolyte of the P-type aqueous electrolyte is K4Fe (CN) 6; the obtained heat rechargeable battery is high in heat energy utilization rate, and energy is saved; battery replacement and manual maintenance are not needed in the using process, the situation that equipment fails to work due to the fact that the electric quantity of the battery is exhausted is avoided, and high voltage, high output power density, high energy density and high thermoelectric conversion efficiency are achieved.

The invention discloses a constant current output friction nanometer generator based on dielectric polymer charge hysteresis migration, which comprises an upper substrate, a sliding block, a stator, electrodes and a lower substrate, and is characterized in that the bottom of the upper substrate is connected with the top of the sliding block, the bottom of the sliding block is connected with the top of the stator, the bottom of the stator is connected with the tops of the two electrodes, and the lower substrate is connected with the bottom of the stator. A narrow gap is reserved between the two electrodes, and the bottoms of the two electrodes are connected with the top of the lower substrate; the upper substrate and the lower substrate are both acrylic acid substrates, the sliding block is made of electronegative materials, and the stator is a polyurethane composite film. According to the constant-current output friction nanometer generator based on the dielectric polymer charge hysteresis migration, the weak charge constraint capacity and the high surface friction potential of the dielectric polymer are utilized to enable charges to move directionally, the constant-current continuous output effect is achieved in an alternating current output mode, the output performance is high, the structure is simple, and the stability is high.

The present invention discloses a piezoelectric power generation system for recovering gravitational potential energy, including a frame, a motor, a lifting shaft, a ratchet power generation device and a support bearing, wherein the motor, the lifting shaft, the ratchet power generation device and the support bearing are sequentially connected by an axial connection, the lifting shaft is wound with a rope, the motor and the support bearing are fixed on the frame, and both ends of the lifting shaft are provided with a support structure fixed to the frame; the ratchet power generation device includes an inner ring, an outer ring and a piezoelectric power generation group; the sleeve extends from the outer ring to the support bearing to support the ratchet power generation device. The system can be used to recover the gravitational potential energy when the goods are lowered, and convert it from the gravitational potential energy to electrical energy through a special rotary piezoelectric effect. The system can be set on elevators, cranes, and lifts to recycle the gravitational potential energy lost when the lifting objects are lowered, so as to make full use of the energy.

The invention provides a self-assembled composite biological membrane anode material, a microbial fuel cell and a preparation method of the microbial fuel cell, and relates to the technical field of fuel cells. According to the high-performance microbial fuel cell provided by the invention, a commercial carbon material loaded cyclodextrin modified iron-based or manganese-based / molybdenum-based oxide is used as an anode substrate material, and nano-material powder of graphene oxide and metal oxide is further added into anode liquid containing microorganisms, so that the high-performance microbial fuel cell is prepared. Electrons generated by microbial metabolism can drive graphene oxide to be reduced on an anode, and at the same time, the electrons and added metal oxide powder are self-assembled to form a multistage electron transfer hybrid biological membrane which has excellent electro-catalytic performance and good conductivity and cooperatively promotes indirect / direct extracellular electron transfer and intercellular electron transfer. The output power density of the microbial fuel cell can be greatly improved, and the application prospect is good.

The present invention proposes a power optimization method for an axial eccentric pendulum electromagnetic energy collector. The present invention adopts a two-dimensional section development method to convert the three-dimensional model of the axial energy collector into a two-dimensional model and then performs iterative calculations, which greatly reduces the model complexity and calculation freedom; at the same time, the model in the present invention adopts a steady-state solution method instead of a transient solution method, which can reduce the time steps required for the solution and further improve the solution speed. The optimization method proposed in the present invention can optimize the coil design parameters in the energy collector, and then realize the optimal design scheme for the output performance of the energy collector. It can maximize the output power of the energy collector in a limited space, which is of great significance for improving the output power density of the energy collector.

The application relates to a friction nanometer power generation device and a self-powered flow sensing system. The device comprises a top cover, a multilayered shell, a base, an FEP tab, a copper patch electrode, a nylon film, an aluminum shaft and an impeller; the top cover is connected with the aluminum shaft through a nut at the top; the FEP tab is fixed in the vertical strip structure of the top cover; the aluminum shaft passes through the center of the impeller; the bearing is fixed on the base; the bearing guides the aluminum shaft; the copper patch electrode and the nylon film are attached to each layer of the shell; the nylon film rubs against the FEP tab; the multilayered shell is fixed in the groove of the base; the impeller drives the aluminum shaft to rotate; the aluminum shaft drives the top cover to rotate; the top cover drives the FEP tab to rotate and then rubs against the nylon film. The application can improve the output power density per unit volume, the capacitor can store more energy per unit time, the LED signal lamp can be ensured to operate for a long time, the flow level can be fed back, and the instantaneous flow size can be accurately obtained through the processing of an electrometer, a transmitter, a DAQ acquisition card and a Labview module.