513 results about "Thermoelectric conversion" patented technology

The invention relates to an ionic redox couple thermoelectric cement-based composite material, the composite material comprises a cement matrix and redox couples, and the redox couples exist in pores of the cement matrix; wherein the redox pairs are K4 [Fe (CN) 6] and K3 [Fe (CN) 6], and the porosity of the cement matrix is 25%-50%. According to the invention, the migration of ions in a cement matrix is regulated and controlled by introducing the redox couple, so that a relatively high Seebeck coefficient, conductivity and power factor are achieved while good mechanical properties are maintained, and the thermoelectric conversion efficiency is remarkably improved. Besides, the composite material can drive electrode reaction through temperature difference to generate a closed current loop, stable current output is achieved, and the problem of current output of a traditional ionic thermoelectric material is solved.

The invention provides a new energy automobile energy closed-loop system, method and product based on waste heat cascade recovery. The system comprises a waste heat cascade recovery subsystem for collecting multi-source waste heat of the new energy automobile and converting the multi-source waste heat into electric energy; the dynamic energy management subsystem is used for storing electric energy and determining a power-on path of the new energy automobile according to the state of the new energy automobile, and the state of the new energy automobile comprises the speed change rate of the new energy automobile, the charge state of the super capacitor bank and the charge state of the lithium battery pack; and the self-powered closed-loop control subsystem is used for monitoring the temperature of the battery module in the power-on process of the new energy automobile and calling electric energy to drive a heater when the temperature of the battery module is lower than a preset temperature threshold value so as to realize closed-loop temperature control. Therefore, the waste heat utilization rate of the new energy vehicle can be improved and the closed-loop management of the energy of the whole vehicle can be optimized by performing stepped recovery on the waste heat of the new energy vehicle and supplying power to the vehicle based on thermoelectric conversion.

The invention provides a thermodynamic optimization method and device for a thermoelectric power generation module and a medium. Belongs to the field of thermoelectric power generation, and comprises the following steps: firstly, determining an optimization target to maximize power output or improve energy conversion efficiency, then establishing a thermodynamic model which comprises heat conduction, heat convection and thermoelectric conversion processes, and setting parameters. An improved ant colony algorithm is adopted, a self-adaptive optimization strategy capable of automatically adjusting and optimizing parameters is designed, and the algorithm introduces volatilization factors and adds random disturbance to optimize the search process. And finally, a multi-objective optimization algorithm is introduced to realize effective balance between the electric power and the thermoelectric conversion efficiency. Through the series of steps, the thermodynamic property of the thermoelectric power generation module can be effectively optimized, so that the power output and energy conversion efficiency of the thermoelectric power generation module are improved.

The invention relates to the technical field of respirators, and discloses a respirator flow dynamic adjusting system based on airflow sensing, which is characterized in that after starting, a multi-mode sensing module acquires spatial flow velocity distribution and dynamic characteristics of respiratory airflow, and generates a composite data flow fused with flow field information; the composite data flow is subjected to nonlinear analysis to generate a state vector representing breathing stability, and the state vector is used for identifying fluid abnormal risks; the state vector generates an optimized execution instruction set by the self-adaptive control engine in combination with the energy state of thermoelectric conversion; the execution instruction set drives the piezoelectric valve and the shear response humidifying layer to cooperatively adjust the flow and the humidity, and outputs physiologically matched breathing gas; fusion collection of spatial flow velocity distribution and dynamic characteristics of respiratory airflow is achieved through the multi-mode sensing module, the limitation of traditional single-point measurement is broken through, and the sensing precision is remarkably improved; a breathing chaos index is constructed through nonlinear kinetic analysis, and early warning of the breathing rhythm stability and the fluid abnormal risk is achieved.

The invention provides a moon thermoelectric conversion device with a replaceable heat storage body, and belongs to the technical field of moon energy and power generation. In order to solve the core problems of discontinuous energy supply, complex system maintenance and the like in the existing lunar base energy technology, the invention provides a lunar thermoelectric conversion device with a replaceable heat storage body. The heat collection layer of the internal coupling heat pipe and the heat storage material internally provided with the heat conduction copper columns form a cold source and a heat source, cold and heat sources in the moon day and the moon night are exchanged, and the continuous and stable power supply capacity of the moon day period is achieved. The device upper cover of the power generation part is in threaded connection with the device inner container of the heat storage part, modular disassembly and replacement can be achieved under the condition that the multi-stage thermoelectric generator fails, and replacement of the heat storage body can also be achieved. A copper column heat conduction mode is adopted in the vertical direction, the problem that gravity reverse heat transfer performance is poor is solved, and day and night uninterrupted supply of lunar base energy is expected to be achieved.

The invention relates to the technical field of new energy automobiles, and provides a hydrogen fuel cell automobile thermoelectric-thermal management cooperative system and a new energy automobile, and the system comprises a hydrogen fuel electric pile, a main cooling loop and a secondary cooling loop connected in parallel with the hydrogen fuel electric pile. The hot end and the cold end of the thermoelectric conversion module are connected to the primary loop and the secondary loop respectively. A cab evaporator and an auxiliary evaporator are sequentially connected in series through a refrigerant loop of the vehicle-mounted air conditioning system, and the auxiliary evaporator is connected to the upstream of the cold end of the thermoelectric conversion module on the secondary loop in series. The controller controls the air conditioner to operate based on the passenger compartment refrigeration demand. When the air conditioner is started to cool the passenger compartment, the refrigerant flowing through the auxiliary evaporator can cool the secondary loop cooling liquid again, so that the temperature of the cold end of the thermoelectric conversion module is reduced, the power generation temperature difference is increased, the waste heat power generation efficiency is improved, and the overall heat dissipation capacity of the system is enhanced synchronously. According to the system, intelligent coupling and energy gradient utilization of air conditioner refrigeration, waste heat recovery and whole vehicle heat management are achieved.

The invention discloses a self-powered temperature control and dynamic thermal compensation system, and belongs to the technical field of energy recovery and intelligent thermal management, the self-powered temperature control and dynamic thermal compensation system comprises a vibration energy capture and power generation subsystem and a bidirectional thermal compensation subsystem, the vibration energy capture and power generation subsystem comprises a piezoelectric array, a thermoelectric module and an energy storage device; the piezoelectric array is used for capturing vibration energy and converting the vibration energy into first electric energy, the thermoelectric module is used for conducting thermoelectric conversion through the temperature difference between the interior and the exterior of an oil tank to generate second electric energy, and the first electric energy and the second electric energy are stored in the energy storage device. The bidirectional thermal compensation subsystem comprises a thermoelectric refrigeration sheet, the thermoelectric refrigeration sheet is used for consuming electric energy in a low-temperature environment to heat the oil liquid, refrigerating the oil liquid in a high-temperature environment and converting waste heat into third electric energy, and the third electric energy is stored in the energy storage device. Self power supply is achieved through vibration energy and temperature difference generated in the vehicle running process, and stable temperature control over the oil tank can be achieved in the extreme environment.

The invention discloses a method for determining the feed water flow of an evaporator of a nuclear power station and a related device, and relates to the technical field of thermoelectric conversion, and the method comprises the steps: obtaining the steam flow of an outlet of the evaporator, the secondary loop pressure of the evaporator, and the feed water temperature and nuclear power of an inlet of a main water supply pipe; the specific enthalpy coefficient is determined by looking up a table according to the secondary loop pressure of the evaporator and the feed water temperature, and the specific enthalpy coefficient is the ratio of the steam specific enthalpy to the feed water specific enthalpy; the nuclear power is converted into theoretical steam flow, the theoretical steam flow is used for verifying the steam flow of an evaporator outlet, and if verification passes, the steam flow of the evaporator outlet is used as one of the inputs of the feed water flow soft measurement model; and inputting the specific enthalpy coefficient, the steam flow at the outlet of the evaporator and the secondary loop pressure of the evaporator into a water flow soft measurement model to obtain the theoretical feed water flow. According to the method, high-precision dynamic measurement and calculation of the water supply flow of the evaporator are realized based on the water supply flow soft measurement model.

The invention discloses a TEC photo-thermal stable thermoelectric power generation device and a preparation method thereof, and relates to the technical field of thermal power generation, and the TEC photo-thermal stable thermoelectric power generation device comprises an energy capture module, a thermoelectric power generation module and a dual-mode heat dissipation module which are sequentially arranged from top to bottom; the energy capture module comprises a silicon substrate with a micro-cone array on the surface, a phase change energy storage buffer dielectric layer coated on the surface of the micro-cone array, and a silicon carbide film layer, a titanium nitride film layer and a titanium nitride nanoparticle layer which are sequentially arranged on the surface of the phase change energy storage buffer dielectric layer; the thermoelectric power generation module comprises a corrugated metal composite substrate and a plurality of thermoelectric units arranged on the surface of the metal composite substrate. The bottleneck that a traditional single material is insufficient in solar spectrum coverage is broken through, the solar energy utilization efficiency is greatly improved, excessive heat generated by sudden change of instantaneous illumination intensity can be effectively absorbed, and continuous and stable heat source input is provided for thermoelectric conversion.

The invention discloses a thermal insulation photovoltaic-thermoelectric coupling system for severe cold areas, which comprises a photovoltaic cell, a phase change container, a phase change material and a thermoelectric power generation sheet, and is characterized in that the phase change container filled with the phase change material and the thermoelectric power generation sheet are sequentially arranged below the photovoltaic cell; the bottom of the photovoltaic cell is connected with the upper side of the phase change container through heat-conducting glue, the lower side of the phase change container is connected with the thermoelectric power generation sheet through heat-conducting glue, phase change materials in the phase change container utilize and transfer heat generated by the photovoltaic cell in the whole process, the effect of keeping and slightly increasing the temperature of the photovoltaic panel is achieved, and meanwhile large heat flow input is provided for the hot end of the thermoelectric sheet. Effective utilization of solar energy is ensured through the two effects, and the conversion efficiency of the coupling system is improved. In addition, the cold ends of the thermoelectric pieces make contact with the external environment, waste heat is dissipated into the cold environment through convection and radiation heat dissipation, and thermoelectric conversion is maintained.

The invention discloses a test method and system for a thermoelectric power generation system, and relates to the field of thermoelectric power generation, and the system comprises a generation module which is used for generating an analog thermoelectric signal with adjustable amplitude, frequency and fluctuation characteristics according to preset thermoelectric conversion core parameters, so as to simulate thermoelectric input scenes under different working conditions; the adaptation module is used for receiving external wide power supply, carrying out voltage stabilization and transformation processing and outputting electric energy matched with the energy consumption of each electric device; according to the invention, analog signals with adjustable amplitude, frequency and fluctuation characteristics can be generated according to thermoelectric conversion core parameters, thermoelectric input scenes under different working conditions can be accurately reproduced, wide external power supply is adapted, electric energy matched with the energy consumption of electric equipment is output, dynamic parameter scheduling and synchronous adjustment are realized by analyzing a test instruction, and the test efficiency is improved. Output voltage, current and temperature difference distribution data are collected synchronously, quantized data associated with thermoelectric input and electric energy output are generated through noise reduction, error correction and feature extraction, and a reliable test report is output efficiently.

The invention relates to the technical field of thermoelectric conversion, solves the technical problems of bending strength, stretchability and the like of an existing flexible thermoelectric device, and particularly relates to a flexible thermoelectric unit based on a thermoelectric thick film, a thermoelectric device and a preparation method of the flexible thermoelectric unit. A group of thermoelectric channels are obtained by combining a thermoelectric thick film material and a slotted copper electrode, heating, welding and curing are performed to obtain a group of thermoelectric channels, a plurality of groups of thermoelectric channels are connected in parallel and inserted by using a connecting electrode to form a flexible thermoelectric unit with a three-dimensional framework, and the flexible thermoelectric unit is integrally placed into a pouring mold after connection and is packaged into a flexible thermoelectric device by a flexible packaging material. The temperature difference between the cold end and the hot end is easy to establish, and excellent bendability and reliability are achieved. Theoretical calculation shows that the flexible thermoelectric device has the stretch rate of about 51%, and the maximum output power under the temperature difference of 200K is 0.126 mW. Compared with an existing flexible thermoelectric device, the flexible thermoelectric device has the advantages of being simple in preparation method process, good in bending and stretching effect, low in cost and the like, and batch preparation can be achieved.

The invention discloses a photo-thermal coupling self-powered tracking driving system, relates to the technical field of photovoltaic power generation, and solves the problems of energy consumption waste and use limitation in the prior art. The thermoelectric conversion module generates power by utilizing the temperature difference between waste heat generated by the photovoltaic panel in an illumination working state and the environment, the photovoltaic panel and the thermoelectric conversion module are electrically connected with the hybrid energy storage unit, and the hybrid energy storage unit comprises a capacitor and a rechargeable battery which are connected in parallel; the energy management controller is electrically connected with the photovoltaic panel, the thermoelectric conversion module and the hybrid energy storage unit and used for collecting the environment illumination intensity, the electric quantity state of the battery and the terminal voltage of the capacitor and generating a control instruction based on collected signals, and the driving mechanism is connected with the energy management controller and used for driving the hybrid energy storage unit to work. And driving the photovoltaic panel to adjust the azimuth angle and / or the elevation angle in response to the control instruction so as to perform sun tracking motion. The use adaptability is improved, and energy waste is reduced.

The invention discloses an alarm system and method of a fire-fighting escape ladder, and relates to the technical field of communication alarm, the alarm system comprises an induction monitoring unit, a multi-source fusion unit, a communication control unit, a power supply control unit and a sound-light alarm unit, and the fire spreading edge is delimited and the fire behavior direction is predicted through multi-source data fusion. The fire emergency is judged to facilitate follow-up fire rescue, then the audible and visual alarm unit is used for fire-fighting escape guide indication, so that people in the escape ladder are guided to transfer orderly, the evacuation efficiency is improved, a distributed communication model is established through the communication control unit, and the channel quality is evaluated to dynamically adjust the communication mode. The anti-interference capability of wireless signals is enhanced, a thermoelectric conversion model is established through the power supply control unit to perform thermoelectric conversion, and then the signals are output to the power supply module to be stored for emergency power supply under the condition of power failure caused by high temperature of a fire disaster, so that the system reliability, the response speed and the personnel safety in a fire disaster scene are remarkably improved.

The application belongs to the technical field of thermoelectric materials, and provides a preparation method of a beta-SrZrS3 thermoelectric conversion bulk material, which comprises the following steps: subjecting SrZrO3 powder to a sulfuration reaction to obtain beta-SrZrS3 powder; and subjecting the beta-SrZrS3 powder to rapid hot-press sintering to obtain the beta-SrZrS3 thermoelectric conversion bulk material. The preparation method has the advantages of low cost, simplicity and rapidness, can realize batch synthesis of SrZrS3 bulk materials, shorten the synthesis period, and obtain the beta-SrZrS3 thermoelectric conversion bulk material with pure phase, uniform composition distribution and high density. The raw material used is SrZrO3 powder which is inexpensive, non-toxic and does not require inert storage environment. The vacuum tube furnace and the rapid hot-press furnace are used, the sulfuration reaction and the hot-press sintering are used for preparation, and since the raw material, the preparation process and the target product meet the requirements of environmental friendliness, the preparation method can be directly extended to the development of the application of perovskite sulfide thermoelectric conversion, and provides a new way for the development of a new thermoelectric system.

The present invention provides a method for preparing a passive heat dissipation device for an integrated circuit chip, comprising: providing a substrate, forming adjacent P-type and N-type layers in the substrate, with the P-type layer located above the N-type layer; forming multiple isolation trenches in the substrate, each isolation trench extending through the P-type layer and into the N-type layer; depositing an isolation material on a first surface of the substrate to fill the isolation trenches, and performing a flattening process down to the surface of the P-type layer; forming a thermoelectric conversion layer on the surface of the P-type layer; forming a heat conductive layer on the surface of the thermoelectric conversion layer; and forming a ground pin connected to the N-type layer on a second surface of the substrate. This method can be used to prepare a passive heat dissipation device that achieves efficient heat dissipation without relying on external power supply, and can dissipate heat simultaneously in both thermal and electrical dimensions, resulting in a better heat dissipation effect than existing technologies. This method is highly compatible with existing semiconductor process technologies and easily achieves efficient chip-level heat dissipation.

The invention provides a pi-type thermoelectric conversion module having excellent cooling performance in which reverse flow of heat is suppressed. A thermoelectric conversion member (A) including a thermoelectric conversion element (M) and a heat countercurrent suppression member (B) including a thermoelectric conversion element (K) are alternately disposed at intervals between a first substrate having a first electrode and a second substrate having a second electrode, the first substrate and the second substrate facing each other. The thermoelectric conversion member A and the thermal countercurrent suppression member B are electrically connected in series via the first electrode on the first substrate and the second electrode on the second substrate, carriers of the thermoelectric conversion element M and the thermoelectric conversion element K are different from each other, one is a hole, and the other is an electron, and the thermoelectric conversion element M and the thermoelectric conversion element K are electrically connected in series via the first electrode on the first substrate and the second electrode on the second substrate. The total SA (m2) of the surface area of the thermoelectric conversion member (A) joined to the first electrode and the second electrode is larger than the total SB (m2) of the surface area of the thermal countercurrent suppression member (B) joined to the first electrode and the second electrode.

The invention discloses an induction heating molten salt energy storage system with controllable distribution of large-plane plate-level eddy current, which comprises a salt storage tank, one end of the salt storage tank is connected with a heating device, and the other end of the salt storage tank is connected with a thermoelectric conversion device. The invention further discloses a design method of the induction heating molten salt energy storage system with the large-plane plate-level eddy current controllable distribution. The design method comprises the steps of designing the total heating power Ptotal, designing the total eddy current power Peddy of the metal heating plate and designing the molten salt flow Qv in unit time. The problems that the vortex area is small, distribution is uncontrollable, the molten salt heating temperature is uneven, and the heating efficiency is low are solved.

The invention belongs to the technical field of clean energy power generation and energy storage, and particularly relates to a multi-coupling liquid metal thermoelectric conversion system. The system comprises a liquid metal reactor module, a photo-thermal system module, a liquid metal energy storage module and an energy conversion module, the liquid metal reactor module is a core base load energy source of the system; the photo-thermal system module is used as peak regulation and supplementary energy; the liquid metal energy storage module serves as a shared energy storage unit of the nuclear energy and photo-thermal system. The problems that nuclear energy peak regulation flexibility is poor, photo-thermal power generation is intermittent, and a traditional molten salt system is limited in high-temperature performance and slow in response can be solved.

Provided is a thermoelectric conversion module having high thermoelectric performance in which the thermal conductivity of an interface between members is improved, the thermoelectric conversion module including a thermal conductive interface member (A) and a heat dissipation member on one surface of an in-plane thermoelectric conversion module, and including a thermal conductive interface member (B) on the other surface of the in-plane thermoelectric conversion module, when RA (mK / W) is the thermal resistance value of the thermally conductive interface member A, RB (mK / W) is the thermal resistance value of the thermally conductive interface member B, RAB (mK / W) is the total thermal resistance value that is the sum of the RA (mK / W) and RB (mK / W), and RM (mK / W) is the total thermal resistance value of the in-plane thermoelectric conversion module, the ratio (RAB / RM) of the RAB to the RM is 1.40 or less.

This application provides a thin-film thermoelectric cooler. It includes a substrate, P-type thermoelectric units, N-type thermoelectric units, a first electrode, and a second electrode. The substrate has a hollowed-out area. On one side of the substrate, perpendicular to a direction, P-type and N-type thermoelectric units are stacked to form thermocouple pairs. The cold ends of the thermocouple pairs are connected through the first electrode. The hot ends of the thermocouple pairs are connected to the second electrode. The cold ends of multiple thermocouple pairs are concentrated in one area of ​​the thin-film thermoelectric cooler, forming a cold load thin-film region. The cold ends of the multiple thermocouple pairs and the portions of the thermocouple arms connected to the cold ends are located in the hollowed-out area of ​​the substrate. By combining the stacked thermocouple pair layout, substrate hollowing technology, and distributing the cold ends in a relatively concentrated area, the efficiency of thermoelectric conversion is improved. This enhances the cooling capacity of horizontal thin-film thermoelectric devices and achieves efficient heat dissipation.

The invention relates to the technical field of thermoelectric functional materials, in particular to an SWCNT / MBene composite thermoelectric thin film and a preparation method and application thereof. An acidified P-type doped one-dimensional SWCNT is used as a substrate, two-dimensional MBene is loaded, a one-dimensional / two-dimensional mixed structure is formed through hot pressing, and the thin film of a heterojunction structure is obtained. Wherein the one-dimensional SWCNT provides a good flexible skeleton and a conductive channel, the two-dimensional MBene nanosheet provides a Seebeck coefficient to enhance the thermoelectric conversion performance of the film, and the two-dimensional SWCNT and the two-dimensional MBene nanosheet cooperate to effectively balance the flexibility, the stability and the power factor of the thermoelectric film. Meanwhile, the preparation process is simple and controllable, large-scale production is easy, and damage to material performance and restriction on production efficiency by a complex process are avoided. The composite thermoelectric thin film is good in flexibility and excellent in performance, the preparation process is suitable for large-scale production, the composite thermoelectric thin film has wide application prospects in the fields of miniature thermoelectric power generation devices, flexible electronic temperature control devices and the like, and a new scheme is provided for practical application of high-performance thermoelectric materials.

To provide a thermoelectric conversion material having a high dimensionless thermoelectric figure of merit over a wide temperature range, and a thermoelectric power generation module and a Peltier cooling module using the thermoelectric conversion material.SOLUTION: A thermoelectric conversion material according to the present invention includes a base material containing PbTe, and at least one element selected from the group consisting of elements whose ionic radius with a valence of +1 is smaller than the ionic radius of Pb with a valence of +2, which is contained in the base material, and the element whose ionic radius with a valence of +1 is smaller than the ionic radius of Pb with a valence of +2 is contained in the base material as an ion with a valence of +1, and the content is more than 0at% and less than 10.0at%.SELECTED DRAWING: Figure 8

The invention belongs to the technical field of energy conservation and environmental protection, and discloses a cadmium telluride power generation glass and photovoltaic energy storage integrated agricultural greenhouse system. The assembly design module is used for dividing cadmium telluride power generation glass into N subunits, and a pi-type thermocouple is integrated on a back plate of each subunit; the crop detection module is used for acquiring and analyzing crop states through subunits and generating crop labels according to the crop states; according to the dynamic shading module, each subunit is connected with a thermoelectric module, the thermoelectric modules are directly connected with an electrochromic glass shading plate, and the fog state light transmittance of the shading plate is dynamically adjusted according to crop labels; according to the intelligent energy storage module, each subunit integrates a cadmium telluride power generation layer, a thermoelectric conversion layer and a super capacitor, and an intelligent charging and discharging strategy is generated according to the illumination intensity. The energy utilization module is used for obtaining a composite adjustment strategy according to the crop label and the energy storage level corresponding to the intelligent charging and discharging strategy; through the integrated design, collaborative optimization of the power generation efficiency, the energy utilization rate and the crop stress damage rate is achieved.

Disclosed in the present invention are an unconventional thermoelectric material and a preparation method therefor. The chemical formula of the unconventional thermoelectric material is TiFexRuyCuzSb, wherein x, y and z are respectively the molecule amount of Fe, Ru and Cu in the chemical formula, 1<x+y+z<2, and x and z are not 0. The unconventional thermoelectric material TiFexRuyCuzSb(1<x+y+z<2) provided in the present invention exhibits excellent thermoelectric performance: the Seebeck coefficient thereof exceeds 180 μV / K in a certain temperature range; the figure of merit (zT) can reach 1.2 at 875 K; and the resistivity of TiFexRuyCuzSb exhibits strict linear temperature dependence in the temperature interval of 14 K to 650 K, which breaks through the Mott-Ioffe-Regel (MIR) limit, and exhibits the bad metal transmission properties of non-quasi particles. The unique transmission properties and the high thermoelectric performance benefit from a complicated electronic structure and associated interaction inside TiFexRuyCuzSb, including spin, valence fluctuation, etc., such that TiFexRuyCuzSb can more efficiently convert heat energy into electric energy during the thermoelectric conversion process, thereby improving the energy utilization efficiency.

The invention relates to the technical field of polymer waste recycling, and discloses a device and method for preparing methyl methacrylate through continuous regeneration of waste acrylic, and the device comprises a two-stage reaction and feeding system, a molten salt online regeneration and energy management system, and a gas-phase product active purification and collection system. The method comprises the following steps: in the first-stage flash evaporation depolymerization cavity, the waste acrylic is in direct contact with high-temperature molten salt to realize rapid flash evaporation depolymerization; finishing the finishing reaction in a secondary molten salt cracking reactor and stripping the product through inert gas; the gas product is subjected to quenching separation and collection after being purified by high-temperature plasma; and the reacted molten salt is subjected to filtering purification, thermoelectric conversion energy recovery and reheating, and then is circulated back to the first-stage reaction cavity. According to the invention, the problems of low heat transfer efficiency, more side reactions, and difficulty in continuous and stable production due to easy inactivation of the medium in the traditional thermal cracking process are solved, the efficient and continuous production process is realized, and the yield and the product quality of methyl methacrylate are improved.

The invention discloses a system device and method for realizing continuous energy supply of wearable equipment by applying an energy collection technology, and aims to break through the bottlenecks of the wearable equipment in the aspects of efficient energy conversion, continuous and stable energy supply and perfect conformality. According to the system device, thermoelectric rubber is used as a core functional material, through an integrated flexible structure design, the system device comprises a heat conduction layer in contact with human skin, a middle thermoelectric conversion layer and a heat dissipation layer in contact with the environment, and an efficient thermoelectric power generation unit is formed. The temperature difference between the human body and the environment is utilized, heat energy is converted into electric energy through the thermoelectric rubber, and power is supplied to the wearable device through the flexible circuit. The thermoelectric rubber has high flexibility (the tensile strength is 850% or above, and the rebound rate after 150% tensile is larger than or equal to 90%) and high thermoelectric conversion efficiency (the room-temperature thermoelectric figure of merit is larger than or equal to 0.49), can perfectly fit the human skin and adapt to dynamic deformation, and continuous self-energy supply of wearable equipment is achieved.

The invention discloses a hydrogel-based energy-saving building structure and a preparation method thereof, and relates to the field of functional hydrogel. The energy-saving building structure is used for isolating a first space and a second space, the first space has a first environment temperature, and the second space has a second environment temperature; the energy-saving building structure comprises a first substrate, a first hydrogel layer, an isolation layer, a second hydrogel layer and a second substrate which are arranged in a stacked mode. The first hydrogel layer has a first phase change temperature and a second phase change temperature, and when the first environment temperature is below the first phase change temperature or above the second phase change temperature, the first hydrogel layer is in a non-transparent state; when the first environment temperature is between the first phase change temperature and the second phase change temperature, the first hydrogel layer is in a transparent state; when the temperature difference between the first environment temperature and the second environment temperature is larger than or equal to a preset threshold value, the second hydrogel layer can conduct thermoelectric conversion. According to the energy-saving building structure, annual bidirectional heat management and continuous thermoelectric energy conversion can be achieved.

The utility model discloses a rotary heat extraction barrel which comprises a cylindrical barrel body, a heat extraction device, a heat extraction device and a heat extraction device, wherein the cylindrical barrel body comprises an inner barrel and an outer barrel; a distance is kept between the outer wall of the inner cylinder and the inner wall of the outer cylinder to form an air duct; when the barrel is arranged on the supporting table, the axis of the barrel and the horizontal plane form a certain angle, so that the vertical heights of the inlet and the outlet are different; the rotation driving device is used for applying rotation force to the barrel body, so that the barrel body rotates on the supporting table in the circumferential direction; the air inlet device is arranged at one end of the air duct, the heat collecting pipeline is arranged at the other end of the air duct and connected with the thermoelectric conversion system, when iron slag with the temperature ranging from 900 DEG C to 500 DEG C enters the inner cylinder of the cylinder body from the inlet, the iron slag in the kiln body rolls along with the inner cylinder to be broken and release heat, and the heat is diffused to the air duct through the wall of the inner cylinder. Air flow blown into the air duct by the air inlet device brings heat to the heat collection pipeline. The heat extraction efficiency is improved.

The application discloses bentonite-regulated solar-driven light-heat-electricity conversion composite phase change material and a preparation method and application thereof, and relates to the technical field of phase change energy storage materials and solar energy utilization. The material is prepared by using bacterial cellulose aerogel as a porous framework, fixing MXene and TiN nanoparticles on the framework through cross-linking and gradient assembly to construct a light-heat-heat conduction network, dispersing bentonite intercalation in a polyethylene glycol matrix to form a composite phase change material, and then encapsulating the composite phase change material in the multistage pores of the aerogel. The surface of the framework has a hydrophobic modification layer. The preparation method comprises the steps of etching, aerogel framework construction, vacuum impregnation encapsulation and hydrophobic modification. The material has high light-heat conversion efficiency, high heat conduction promotion rate, excellent leakage prevention performance, fast crystallization characteristics and super-hydrophobic self-cleaning ability. When the material is combined with a thermoelectric power sheet, a solar light-heat-electricity conversion system can be constructed, and the material has a wide application prospect in the field of renewable energy.