10results about How to "Improve thermoelectric conversion efficiency" patented technology

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 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 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.

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.

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.