24results about How to "Improve thermoelectric conversion efficiency" patented technology

The invention discloses an electrolyte, an N-type thermal battery based on the electrolyte and a preparation method of the N-type thermal battery, and relates to the technical field of thermal batteries. The invention provides an electrolyte. The electrolyte comprises deionized water, CuSO4, (NH4) 2SO4 and ethylenediamine, the concentration of CuSO4 in the electrolyte is 0.1 mol / L to 0.4 mol / L; the concentration of (NH4) 2SO4 in the electrolyte is 1 to 4 mol / L; the concentration of ethylenediamine in the electrolyte is 1-4 mol / L; the electrolyte is applied to a thermal battery with copper as an electrode, ethylenediamine in the electrolyte reacts with copper of an anode to generate a Cu (en) 22 + chelate, and a Cu / Cu (en) 22 + reaction couple is formed; the N-type thermal battery based on the Cu / Cu (en) 22 + reaction couple is obtained, the Seebeck coefficient of the N-type thermal battery reaches 2.31 mV K <-1 >, and the performance of the N-type ionic thermal battery is effectively improved.

The invention provides a laminated thermoelectric-piezoelectric hybrid energy collector. The collector comprises a laminated thermoelectric conversion unit and a piezoelectric conversion unit. The thermoelectric conversion unit comprises a heat-conducting sheet, a thermoelectric material, a conductive copper sheet, a load resistor and a wire. The piezoelectric conversion unit comprises a substrate layer cooling fin, a piezoelectric plate and a mass block. According to the hybrid energy collector, the thermoelectric conversion unit and the piezoelectric conversion unit are integrated, the thermoelectric energy converter and the piezoelectric energy converter are combined into a hybrid energy collection device, environmental waste heat and environmental wind energy are converted into electric energy at the same time, the manufacturing cost of the energy collector is reduced, and meanwhile the environmental energy utilization efficiency is improved. According to the device, heat energy generated by the waste heat discharging device and environmental wind energy can be fully utilized at the same time for recycling power generation capacity, high energy collection efficiency is achieved, the device is simple and stable, the practicability of the device is improved, and good application prospects are shown in the field of energy collection.

The invention relates to a double half-Heusler alloy thermoelectric material with low lattice thermal conductivity and a preparation method thereof, the thermoelectric material is any one of a p-type thermoelectric material or an n-type thermoelectric material, the chemical formula of the p-type thermoelectric material is Sc0. 6V0. 5Co1-xNixSb, x is more than or equal to 0 and less than or equal to 0.12, and the n-type thermoelectric material is one of Sc0. 6V0. 5Co1-xNixSb. The chemical formula of the n-type thermoelectric material is Sc0. 5V0. 6Co1-yNiySb, wherein y is greater than or equal to 0 and less than or equal to 0.30. The preparation method comprises the following steps: mixing Sc, V, Co, Ni and Sb, grinding, sequentially carrying out sintering and vacuum packaging treatment to obtain a thermoelectric material wafer, and carrying out high-temperature annealing treatment on the thermoelectric material wafer to obtain the double half-Heusler alloy thermoelectric material with low lattice thermal conductivity. Compared with the prior art, the method has the advantages that the prepared double half-Heusler alloy thermoelectric material is replaced by the heterovalent elements, the Sc / V ratio is accurately regulated and controlled, p-type and n-type thermoelectric materials based on the same parent compound are successfully obtained, and the two materials both show promising thermoelectric performance.

The application relates to a heat dissipation device with a heat recovery function and an electronic device, wherein the heat dissipation device with the heat recovery function comprises a heat conduction box body with a first heat conduction box wall and a second heat conduction box wall; a thermoelectric conversion structure comprises a first thermoelectric conversion assembly arranged in the heat conduction box body, the first thermoelectric conversion assembly comprises at least one first thermoelectric conversion sheet, each first thermoelectric conversion sheet has a first cold surface and a first hot surface arranged oppositely, the first hot surface is attached to the inner surface of the first heat conduction box wall, and the first cold surface is adapted to indirectly contact the inner surface of the second heat conduction box wall; a heat dissipation assembly comprises a first heat dissipation fin, a substrate and a first heat conduction pipe group, the substrate is arranged between a heat source of the electronic device and the first heat conduction box wall, and two oppositely arranged surfaces are directly in contact with the heat source and the first heat conduction box wall respectively; the heat conduction box body is arranged between the first heat dissipation fin and the substrate, and the substrate is connected with the first heat dissipation fin through the first heat conduction pipe group; and the thermoelectric conversion effect and the heat dissipation efficiency are both high.

The embodiment of the present application provides a nuclear power source, comprising a reactor core, the reactor core comprising a plurality of thermionic fuel elements, each of which forms a coolant channel inside for flowing of a coolant, the nuclear power source further comprising: a coolant loop for receiving the coolant from the coolant channel and circulating the coolant back to the coolant channel; a plurality of heat transfer heat pipes, an evaporation section of each of the heat transfer heat pipes being in heat conduction connection with the coolant loop; a plurality of thermoelectric conversion modules, each of the thermoelectric conversion modules being in heat conduction connection with a condensation section of one of the heat transfer heat pipes to convert heat transmitted by the heat transfer heat pipe into electric energy. The embodiment of the present application utilizes the coolant loop to lead heat of the thermionic fuel elements out of the reactor core, utilizes the heat transfer heat pipe to exchange heat with the coolant loop, and then utilizes the thermoelectric conversion element to convert heat conducted by the heat transfer heat pipe into electric energy, so that the reactor simultaneously adopts thermionic conversion and other thermoelectric conversion, and the thermoelectric conversion efficiency of the reactor power source can be greatly improved.

The present invention belongs to the field of thermophotovoltaic technology, and discloses a thermophotovoltaic radiator, a control method, a medium, a device and a terminal, and determines the emission spectrum of a selective thermophotovoltaic radiator under ideal conditions; constructs a single-layer uniform dielectric film transmission model and a multi-layer uniform dielectric film transmission model respectively to clarify the working mechanism of the thermophotovoltaic radiator; constructs a broadband filter plus a short-wave filter model to achieve the design of the thermophotovoltaic radiator system. Through experimental simulation, the multi-layer uniform dielectric thermoradiator designed by the present invention based on the single-cavity filter model has a transmittance of 99% at a wavelength of 1.499 microns, which basically meets the ideal emission spectrum with sharp and high thermal emission conditions at 1.5 microns, reflecting the advantages of the model. The design results of the present invention verify the good effect of the transfer matrix method in the field of calculating emission spectra, provide the possibility for designing material structures for specific applications, and enhance the practicality of material informatics in the field of heat and mass transfer.

The invention discloses an out-of-plane gradient type thermoelectric composite film, a preparation method thereof and a thermoelectric sensing device, and the preparation method comprises the steps: a, mixing a thermoelectric material and a low-thermal-conductivity material according to different mass percentages, and preparing a plurality of groups of prefabricated mixtures with different concentrations; b, mixing each prefabricated mixture with a solvent, and performing ultrasonic dispersion to obtain a plurality of groups of uniform dispersion liquid; c, through a step-by-step suction filtration method, the multiple sets of uniform dispersion liquid are sequentially subjected to vacuum suction filtration film forming according to a preset sequence, and the preset sequence corresponds to the fact that the concentration of the thermoelectric material in the dispersion liquid is changed in a gradient mode in the film forming direction; and d, drying the film formed by step-by-step suction filtration to obtain the thermoelectric composite film with the out-of-plane gradient structure. Compared with the prior art, the thermoelectric composite film prepared by the invention can maintain high thermoelectric conversion efficiency, and also can significantly improve temperature difference maintaining capability and device reliability.

This invention provides an integrated heat dissipation and power generation device structure, fabrication method, and chip structure. A bottom electrode, a thermoelectric layer, and a top electrode are sequentially formed on a flexible substrate. Two pre-reserved thermoelectric unit output terminals on the thermoelectric layer form a series circuit through the bottom and top electrodes, thus forming a flexible thin-film array thermoelectric structure. The fabrication method, employing a miniaturized unit design, effectively reduces volume waste. The use of a flexible substrate solves the problem of rigid electrodes easily breaking under bending and uneven thermal expansion, enhancing the device's durability and stability. The thermoelectric layer material of this integrated heat dissipation and power generation device structure can absorb and dissipate heat, and can reuse thermal energy to achieve thermoelectric power generation using the material's own thermoelectric properties. It achieves dual functions of thermal management and energy conversion using a single material, optimizing thermoelectric conversion efficiency.

The present invention provides a thermoelectric conversion device and a preparation method thereof, and a thermoelectric conversion system, wherein the thermoelectric conversion device comprises: a first electrode; a P-type element and an N-type element located on a side surface of the first electrode and electrically connected to the first electrode; a second electrode located on a side of the P-type element and the N-type element away from the first electrode; a first heat conducting plate located on the first electrode away from the P-type element and the N-type element; a second heat conducting plate located on the second electrode away from the P-type element and the N-type element; a microstructure located on the surface of the first heat conducting plate and / or the second heat conducting plate, wherein the direction from the first surface of the microstructure to the second surface of the microstructure is the same as the direction from the first heat conducting plate to the second heat conducting plate, and the area of ​​the first surface is smaller than the area of ​​the second surface. The microstructure realizes directional control of heat flow in the thermoelectric conversion device, thereby increasing the temperature difference between the two ends of the thermoelectric conversion device, and further increasing the thermoelectric conversion efficiency or cooling power of the thermoelectric conversion device.

A thermoelectric conversion module (18) is provided with a substrate (40) and a plurality of thermoelectric conversion bodies (42) disposed on the substrate (40). The thermoelectric conversion body (42) has: an N-type thermoelectric conversion element (44) having a first cross-sectional area in a cross-sectional view; a P-type thermoelectric conversion element (46) having a second cross-sectional area smaller than the first cross-sectional area in a cross-sectional view; and an electrode (48) that electrically connects one end of the N-type thermoelectric conversion element (44) and one end of the P-type thermoelectric conversion element (46). The following formula is satisfied: tau 1 [alpha] gt; condition (1) is represented by [tau] 1 [beta] and [tau] 2 [alpha] gt; and tau 2 [beta] represents at least one of conditions (2).

The embodiment of the invention discloses a high-efficiency heat pipe stack thermophotovoltaic power supply system. According to one specific embodiment, the efficient heat pipe pile thermophotovoltaic power supply system comprises a heat source body, a heat pipe, a radiator, a filter-photoelectric wafer integrated body, a heat dissipation system, a heat preservation system and a heat pipe reactor, and the heat preservation system comprises a radiation reflection screen, a spacing layer and an outermost heat preservation layer; the radiation reflecting screens and the spacing layers are arranged in an alternate stacking manner, and the outermost layer is covered with the outermost thermal insulation layer; the heat pipe, the heat source body and the radiator exchange heat through heat conduction; the radiator and the filter-photoelectric wafer integrated body transfer energy in a heat radiation mode; and the filter-photoelectric wafer integrated body is subjected to heat dissipation through a heat dissipation system. According to the embodiment, higher-power energy supply and higher thermoelectric conversion efficiency can be provided for the deep sea detector.

The invention discloses a co-sintered segmented thermoelectric material and a preparation method thereof, and the method comprises the following steps: S1, selecting N thermoelectric matrix materials with the same material system but different chemical proportions, respectively weighing the raw materials according to the stoichiometric ratio of the N thermoelectric matrix materials, and carrying out the high-temperature smelting to obtain N cast ingots; s2, the N types of cast ingots are subjected to crushing and powdering correspondingly, and N types of powder are obtained; and S3, the N kinds of powder are weighed according to the mass ratio requirement, the specific mass ratio is obtained through simulation according to the actual temperature difference and the powder number, then a sintering mold is filled with the N kinds of powder step by step according to the room-temperature conductivity from low to high or from high to low, integrated sintering is conducted, the co-sintered segmented thermoelectric material is obtained, and N is an integer larger than or equal to 2. The method is simple in preparation process and flexible in structure, and a thermoelectric material with high performance and a wide working temperature area can be obtained through integrated sintering.

This invention discloses a waste heat recovery and utilization system and method for laptops based on thermoelectric conversion effects, belonging to the field of thermoelectric materials and devices technology. It includes: a distributed thermoelectric array module composed of multiple miniature TEG units distributed in high-heat areas of the laptop, generating electricity directly through temperature differences; an adaptive thermal management module including a thermally conductive silicone layer and miniature heat dissipation fins to optimize the temperature difference between the hot and cold ends; a multi-level power management module including a rectifier circuit, a DC-DC boost chip, and a recovery and storage battery device to convert the unstable low-voltage DC power output from the TEGs into stable electrical energy, which is then stored and supplied to the target device; and an intelligent control module that dynamically adjusts the working area of ​​the miniature thermoelectric power generation units based on temperature sensor data, prioritizing power generation at the location with the largest temperature difference, and matching power supply requirements through a PMIC chip. This invention achieves efficient waste heat conversion and utilization through innovative design, solving the problem of low thermoelectric conversion efficiency in miniaturized devices, and achieving energy saving and environmental protection.

The embodiment of the present application provides a nuclear power source, comprising: a core, the core comprising a plurality of thermionic fuel elements, each of the thermionic fuel elements internally forming a first coolant channel for flowing a first coolant; a first collecting cavity and a second collecting cavity, the first coolant flowing from the first collecting cavity, through the thermionic fuel elements, and into the second collecting cavity; at least one heat exchanger, each of the heat exchangers having a first coolant flow channel and a second coolant flow channel capable of heat exchange; a first coolant loop for receiving the first coolant from the second collecting cavity and returning the first coolant to the first collecting cavity after the first coolant flows through the first coolant flow channel; at least one second coolant loop for circulating a second coolant, the second coolant in each of the second coolant loops being capable of flowing through one of the second coolant flow channels; and at least one thermoelectric conversion element for converting heat of one of the second coolant loops into electric energy.

This invention discloses a TEC composite structure integrating microchannels and a series-enhanced thermoelectric arm array, and its fabrication method. The structure includes: a first thermally conductive layer and a second thermally conductive layer, both with liquid flow microchannels on their outer surfaces; a first electrode layer located on the inner surface of the first thermally conductive layer; a second electrode layer located on the inner surface of the second thermally conductive layer; and multiple TEC units located between the first and second electrode layers. Each TEC unit includes P-type thermoelectric arms, N-type thermoelectric arms, and suspended thermoelectric arms. The P-type and N-type thermoelectric arms are arranged alternately. The suspended thermoelectric arms are suspended between the P-type and N-type thermoelectric arms and include P-type and N-type thermionic arms. Connections between the P-type and N-type thermoelectric arms, between the N-type and P-type thermoelectric arms, and between the P-type and N-type thermoelectric arms are all achieved through metallic materials. This invention simultaneously achieves ultra-strong hot-end heat dissipation, ultra-low thermal bypass leakage, and high interface reliability in TEC.

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.

This invention discloses a method for improving the thermoelectric performance of an AB ring through lateral coupling and optical field irradiation. The method includes: first, coupling two quantum dots QD1 and QD2 into a dual-quantum-dot structure via a tunnel junction; spatially confining the dual-quantum-dot structure; coupling the dual quantum dots into the AB ring via the tunnel junction; placing left and right electrodes on opposite sides of the AB ring structure; applying thermal radiation to create a temperature gradient between the left and right electrodes; injecting electrons into the AB ring electrodes, causing electron transport under the influence of the lateral coupling of the dual quantum dots and the temperature gradient; and applying an adjustable optical field to the dual-quantum-dot structure. By optimizing the tunneling coupling strength between the quantum dots and adjusting the optical field frequency, the thermoelectric transport characteristics of the system are synergistically controlled, thereby obtaining enhanced spin thermoelectric potential and spin ZT coefficient. This invention optimizes thermoelectric performance by increasing the tunneling coupling strength between quantum dots and improving the optical field frequency, providing a foundation for designing fast-response, high-efficiency, and low-energy-consumption thermoelectric devices.

A thermoelectric conversion element 1a includes a substrate 10 and magnetic bodies 21. The magnetic bodies 21 are disposed on the substrate 10 and have ferromagnetism or antiferromagnetism. A ratio of a measured density of the magnetic bodies 21 to a theoretical density of the magnetic bodies 21 is 0.80 or more.

The invention relates to the technical field of thermoelectric conversion and semiconductor device design, in particular to a design research method of a thermoelectric transistor power generation device. According to the specific technical scheme, on the basis of a built thermoelectric transistor theoretical model, a complete thermoelectric transistor power generation device performance design research process and method are provided through doping concentration optimization and circuit design, and therefore the output performance of a thermoelectric transistor can be optimized. According to the thermoelectric transistor power generation device obtained through optimization design, the Seebeck voltage generated by the temperature difference under the room temperature condition can directly drive the thermoelectric transistor to work normally, thermoelectric conversion is achieved, the output power and the thermoelectric conversion efficiency are greatly improved, the thermoelectric transistor power generation device can be applied to thermoelectric power generation under various temperature difference conditions, and the thermoelectric transistor power generation device has a wide application prospect. The device can supply power to different types of electric appliances, and can also be applied to various thermoelectric detection.

The present application belongs to the technical field of thermoelectric conversion, and particularly relates to a self-repairing thermoelectric hydrogel based on lignin, a thermoelectric conversion device, and a preparation method and application thereof. The present application successfully prepares a self-repairing thermoelectric hydrogel based on lignin by compounding specific inorganic small-molecule thermoelectric materials with cyclodextrin-modified lignin sulfonate and adamantane acrylate. In the formation process of the thermoelectric hydrogel, the inorganic small-molecule thermoelectric materials are uniformly dispersed in the network structure of the hydrogel, so that the hydrogel has excellent mechanical properties; the host-guest interaction introduced by the cyclodextrin-modified lignin sulfonate enables the hydrogel to have excellent self-repairing ability; the hydrogel also has good temperature sensitivity; the above characteristics greatly improve the thermal effect, thermoelectric conversion performance and electrochemical performance of the thermoelectric conversion device prepared based on the above thermoelectric hydrogel; and the preparation method of the above thermoelectric hydrogel is simple and easy to operate, the conditions are mild, the raw materials are easy to obtain, and the thermoelectric hydrogel has a wide application prospect.

A thermoelectric conversion element 1a includes a magneto-thermoelectric conversion body 11 and a wiring 12. The magneto-thermoelectric conversion body 11 linearly extends. The wiring 12 is electrically connected to the magneto-thermoelectric conversion body 11. In the thermoelectric conversion element 1a, an absolute value |ΔS| of a difference between a Seebeck coefficient Sm in the length direction of the magneto-thermoelectric conversion body 11 and a Seebeck coefficient Sc in the length direction of the wiring 12 is 10 µV / K or less.

The present application provides a thermoelectric conversion device and a building structure monitoring system, wherein the thermoelectric conversion device includes a heat-conducting layer and a heat-dissipating layer, wherein a plurality of P-type semiconductor material module groups and a plurality of N-type semiconductor material module groups are arranged alternately between the heat-conducting layer and the heat-dissipating layer, wherein the plurality of P-type semiconductor material module groups and the plurality of N-type semiconductor material module groups are connected in series through a first guide bar; a heat channel closed loop is arranged in the heat-dissipating layer, wherein a condensing medium is arranged in the heat channel closed loop; and a phase change material is arranged in the heat-conducting layer. The present application enhances heat conduction by arranging a heat-conducting layer and a heat-dissipating layer at the hot end and the cold end of the P-type semiconductor material module group and the N-type semiconductor material module group. The heat-dissipating layer has a built-in heat channel closed loop, and the heat-conducting layer absorbs and releases a large amount of heat and transfers heat by phase change of the phase change material, thereby maintaining a stable temperature difference, and the internal temperature of the heat-dissipating layer and the heat-conducting layer is more uniform, thereby improving the efficiency of thermoelectric conversion.

The utility model discloses a high-precision medical storage and transportation box based on a novel double-heat-sink structure, which comprises a shell and is characterized in that a cold conduction liner is fixedly connected to the middle of the inner side of the shell, and a novel multi-element heterogeneous thermopile structure is arranged in a cavity between the shell and the cold conduction liner; the novel multi-element heterogeneous thermopile structure comprises a set of conductors, the conductors penetrate through and are fixedly connected with a fixing plate, the fixing plate is fixedly connected with the inner side of the shell, and the two ends of each conductor are electrically connected with a thermoelectric arm on the opposite side of a P section and a thermoelectric arm on the opposite side of an N section respectively. The other side of the P section and the other side of the N section are connected with the P section and the N section through conductive materials to form a P-P-N-N-P-P-N-N snakelike series loop, the refrigerating side of the novel multi-element heterogeneous thermopile structure is tightly attached to the cold conduction inner container, and the heating end of the novel multi-element heterogeneous thermopile structure is tightly attached to the shell. Compared with common semiconductor refrigeration equipment, the semiconductor refrigeration equipment has the advantages that the negative influence of the Fourier effect is reduced, and the thermoelectric conversion efficiency is improved.

The present invention discloses a series-parallel heat exchange structure and a thermovoltaic power generation device, including more than two parallel heat exchange channels, the heat exchange channels including more than two heat exchange units, in each of the heat exchange channels, the heat exchange units are connected in series or in series-parallel, the heat exchange units include a number of parallel hot-end heat sinks used as hot liquid circulation channels, and a number of parallel cold-end heat sinks used as cold liquid circulation channels; the hot-end heat sinks and the cold-end heat sinks are arranged alternately. The present invention solves the integration problem of the heat exchange units, and the series-parallel connection structure is simple and compact, and multiple heat exchange units can be easily interconnected to form a higher-power thermovoltaic power generation system; the heat exchange structure of the present invention causes little flow resistance loss to the heat exchange medium, and the temperature difference between the inlet and outlet of the cold and hot end medium of each heat exchange unit is small, which is conducive to improving the overall thermoelectric conversion efficiency.