243 results about "Nanofluid" patented technology

The invention discloses an S-shaped micro-channel heat dissipation device with a double-layer turbulent flow structure and a use method, belongs to the field of liquid cooling heat dissipation, and is suitable for heat dissipation of a high-heat-flux device or a heat conduction device. The device comprises a base, a cover plate, a micro-channel body, turbulent flow columns, a flow guide structure, O-shaped sealing rings and quick-screwing connectors, the micro-channel body is provided with S-shaped channels which are vertically symmetrical, the turbulent flow columns are evenly arranged in the centers of the channels, and the top ends of the turbulent flow columns are flush with the end face of the micro-channel body. The turbulent flow columns can be rectangular columns or water-drop-shaped columns which are arranged in a single row or multiple rows at equal intervals and are matched with the flow guide structure to achieve efficient flow division of cold and hot fluid and interlayer heat interaction. Fluid mixing is strengthened through the centrifugal force of the S-shaped channel, a heat boundary layer is destroyed by the turbulent flow columns, and the problems that a traditional straight channel is low in heat exchange efficiency and uneven in temperature distribution are solved. Deionized water or nanofluid is selected as cooling liquid, closed circulation is formed by entering and exiting of the cooling liquid through the quick-screwing connector, and the adaptive scene and the comprehensive performance of the device are further expanded through the multiple rows of turbulent flow columns or the water-drop-shaped turbulent flow columns.

The invention relates to the technical field of heat dissipation of electronic devices, in particular to a multi-objective optimization method for a microchannel heat sink turbulent flow structure based on nanofluid. The multi-objective optimization method comprises the steps that integrated computational fluid mechanics simulation, a response surface method and an NSGA-II algorithm are matched; the system solves the problems that in the prior art, research on the synergistic effect of a nanofluid and a turbulent flow structure is insufficient, and multi-objective optimization efficiency is low, firstly, a three-dimensional numerical model is constructed based on ANSYS, and heat transfer and pressure drop characteristics under different parameters are simulated and quantified; secondly, establishing a mathematical model of an input parameter and an output target by adopting a response surface method, and revealing a multi-parameter coupling rule; and finally, performing multi-objective optimization on the synergistic effect by using an NSGA-II algorithm, obtaining a Pareto optimal solution set, and realizing the optimal balance of the heat dissipation performance and the voltage drop. By adopting the technical scheme, through combination of numerical simulation and experimental verification, the optimization efficiency is remarkably improved, and the optimization cost is reduced. And a solution with theoretical preciseness and engineering practicability is provided for thermal management of high-power electronic devices.

The invention provides energy storage battery immersed cooling liquid based on fluorinated nanofluid and a preparation method, and belongs to the technical field of heat management of energy storage equipment, the energy storage battery immersed cooling liquid comprises 74-84% of perfluoropolyether base liquid, 10-15% of surface modified boron nitride nanosheets, 5-8% of microencapsulated perfluorohexanone and 1-3% of polydimethylsiloxane modified silicon dioxide. Microencapsulated perfluorohexanone is integrated into the cooling liquid to achieve the dual functions of heat dissipation and fire extinguishment, and synergistic effects are generated in the aspects of heat conduction, insulation, fire extinguishment and the like through combined use of the perfluoropolyether base liquid, the surface modified boron nitride nanosheets, the microencapsulated perfluorohexanone and polydimethylsiloxane modified silicon dioxide and specific modification performance of the perfluoropolyether base liquid, the surface modified boron nitride nanosheets, the microencapsulated perfluorohexanone and the polydimethylsiloxane modified silicon dioxide. And experimental data can prove that the comprehensive performance of the material has substantive features and remarkable progress in the aspects of heat conductivity coefficient improvement, fire extinguishing time and the like.

The invention belongs to the technical field of efficient heat management, and relates to a nanofluid enhanced heat exchange system based on a built-in ultrasonic device, which comprises an integrated micro-channel cooling plate 2, an embedded ultrasonic device 3, a nanofluid circulating system and an intelligent control system 5, the integrated micro-channel cooling plate 2 is attached to the surface of a heating device 1 (such as a solar cell panel), and the embedded ultrasonic device 3 is attached to the surface of the heating device 1. A groove is formed in the side, away from the heating device 1, of the integrated micro-channel cooling plate 2, the embedded ultrasonic device 3 is installed in the groove, and the nano-fluid circulating system and the embedded ultrasonic device 3 are in electric signal connection with the intelligent control system. The invention can effectively solve the industrial problems of high-temperature efficiency reduction, nanofluid agglomeration instability and the like of the solar cell panel, improve the heat dissipation efficiency and improve the conversion efficiency of the cell panel.

The invention relates to the technical field of comprehensive utilization of solar energy, in particular to a photovoltaic heat combined supply self-adaptive heat flow control system and a control method thereof, a photovoltaic-heat-storage-diagnosis integrated module is composed of a photovoltaic layer, a micro-channel heat exchange layer, a heat storage unit, a self-diagnosis unit and an intelligent control unit, based on illumination intensity, assembly temperature, fluid flow, environment humidity and wind speed data, the flow velocity of a cooling medium is dynamically adjusted through an algorithm fusing model predictive control and deep reinforcement learning, and the controller adopts a multi-core heterogeneous processor and supports OTA remote upgrade and standardization module interfaces. Through the collaborative design of the double-sided power generation assembly and the composite nanofluid and in combination with an intelligent heat flow control strategy, the temperature of the photovoltaic assembly is stabilized within the optimal interval of 25-40 DEG C, and the power generation efficiency is improved by 15-30% compared with that of a traditional system; and the heat storage unit adopts a paraffin-based / carbon nanotube composite phase change material, and is matched with a three-stage waste heat recovery system, so that the breakthrough improvement of the comprehensive utilization rate of solar energy is realized.

The invention discloses a soft coal seam nanofluid fracturing propping material and a preparation method thereof.The soft coal seam nanofluid fracturing propping material is prepared from, by weight, 80-90% of a base material, 1-5% of a super-hydrophobic coating, 5-10% of a catalytic active component and 5-15% of a rheological enhancer, the base material is a compound of high-purity silicon dioxide nanoparticles and graphene nanosheets GNP, the particle size of the high-purity silicon dioxide nanoparticles is 50-200 nm, the super-hydrophobic coating is a fluorosilane modified layer, the thickness of the super-hydrophobic coating is 5-20 nm, and the invention relates to the technical field of coal bed gas exploitation. According to the soft coal seam nanofluid fracturing propping material and the preparation method thereof, the surface of the material is provided with a super-hydrophobic coating, friction force with a coal matrix is reduced, high embedding resistance is achieved, the flow conductivity is specifically enhanced, an extra flow channel is provided through a porous nanostructure, the fracturing fluid permeability is improved, and meanwhile gas desorption can be cooperated; catalytic active sites are introduced to the surface of the material to promote adsorption and diffusion of methane molecules.

The invention relates to the technical field of nanofluid enhanced heat transfer simulation, in particular to a molecular dynamics-based mixed nanofluid heat transfer characteristic analysis method, which comprises the following steps of: constructing a molecular model comprising copper, graphene nanoparticles and an ionic liquid / water mixed base solution, and calculating the heat transfer characteristic of the mixed nanofluid through a distribution potential function and a periodic boundary condition; and performing energy minimization and molecular dynamic relaxation to achieve thermodynamic equilibrium. A steady-state temperature gradient is established based on the unbalanced molecular dynamics principle, and the thermal conductivity is calculated according to the Fourier law. Microcosmic parameters such as a radial distribution function, mean square displacement and the number of hydrogen bonds are synchronously analyzed, and a coupling mechanism of interaction and heat transfer performance of the nano-particle-base fluid interface is disclosed. According to the method, the heat transfer characteristic of the mixed nanofluid can be clarified on the molecular scale, and an efficient and reliable analysis means is provided for nanofluid screening and design in application of a solar heat collector, a heat management system and the like.

The invention provides a method for determining a nanofluid oil displacement effect of a low-permeability reservoir, and relates to the technical field of oil exploitation. The method comprises the following steps: providing a core of a low-permeability reservoir, and measuring the particle size of nanoparticles in a target nanofluid; performing high-pressure mercury injection test and nuclear magnetic resonance measurement on the rock core to respectively obtain a rock core pore throat radius-distribution frequency relation curve and a first T2 image, and performing benchmarking on the two images to obtain a pore throat radius-relaxation time relation curve; carrying out displacement experiments (oil displacement, first water displacement, nanofluid displacement and second water displacement) on the rock core, and carrying out nuclear magnetic resonance measurement to obtain T2 images; and observing or calculating the area enclosed by the curve and the relaxation time in each image, and combining with a pore throat radius-relaxation time relation curve to obtain the oil displacement effect of the nanofluid on different pores of the oil reservoir. The oil displacement effect of the nanometer system is determined according to the characteristic parameters of the reservoir core before and after the nanometer fluid is injected, and the method has important guiding significance for formulating a scheme for improving the recovery effect of the low-permeability oil reservoir.

The invention discloses a photovoltaic photo-thermal hydrogen production and energy storage system based on nanofluid and a phase change material, and relates to the technical field of photovoltaic photo-thermal hydrogen production and energy storage, the system comprises a photovoltaic photo-thermal assembly, a water tank, a solar heat collector and a PEM electrolytic bath; the photovoltaic photo-thermal assembly comprises a photovoltaic cell, a first thermoelectric generator, a nanofluid channel and a composite phase change material which are arranged from top to bottom. The solar heat collector comprises a second thermoelectric generator, a water fluid channel and a composite phase change material which are arranged from top to bottom; mixed nanofluid in the nanofluid channel enters a heat exchange coil in the water tank for heat exchange; water in the water tank firstly enters a water fluid channel of the solar heat collector to be preheated and then enters the PEM electrolytic bath; the mixed nanofluid is composed of BN, MWCNT nanoparticles and pure water; the composite phase change material is composed of BN, MWCNT nanoparticles and paraffin. Efficient output of heat energy, electric energy and hydrogen energy can be achieved.

The invention discloses an oil-displacing agent based on zirconium oxide nanosheets and a preparation method of the oil-displacing agent. The oil displacement agent comprises the following components in parts by mass: 0.2-1 part of zirconium oxide nanosheets, 10-30 parts of a surfactant and 5000-10000 parts of water, the size range of the zirconium oxide nanosheet is 200 to 300 nm. The two-dimensional zirconium oxide nanosheet is prepared by utilizing a green substitute solvent-ionic liquid assisted alcohol solvothermal method, the synthesis method is simple, convenient, effective and green, and the size of the product is controllable. The zirconium oxide material has the characteristic of changing rock wettability, and can be used as a metal oxide nano material to improve the viscosity of the prepared nanofluid, reduce the fluidity ratio, generate structural separation pressure on the interface of crude oil and reservoir rock and realize efficient stripping of retained crude oil, thereby greatly improving the recovery efficiency.

The invention discloses a nanofluid mixed matrix membrane as well as a preparation method and application thereof, and belongs to the field of gas separation. The nanofluid mixed matrix membrane comprises a polymer matrix and a nanofluid filler, the nanofluid filler is of a three-dimensional layered structure, a core layer is a porous material layer, a secondary outer layer is a coupling agent connecting layer, and an outermost layer is an organic matter coronal layer containing a CO2-philic group. The coronal layer improves the compatibility of the porous material and the polymer matrix and increases the CO2 affinity of the mixed matrix membrane, not only increases the diffusivity of the mixed matrix membrane, but also increases the CO2 solubility, and due to the unique connection mode between the porous core and the coronal layer, the thermal stability of the porous core and the coronal layer is also enhanced. Therefore, the prepared novel efficient mixed matrix membrane has good gas separation performance and thermal stability and is especially suitable for CO2 separation, and CO2 / H2 of the product breaks through the Robeson upper limit in 2008.

The present invention provides functionalized molybdenum disulfide nanosheets and a preparation method and application thereof. The preparation method comprises the following steps: mixing a solvent, 1 part by weight of thioctic acid, and 5 to 10 parts by weight of a first compound for 2 to 4 hours to obtain a mixture; adding 0.05 to 0.1 parts by weight of 1-hydroxybenzotriazole to the mixture, mixing for 24 to 48 hours, and drying to obtain an intermediate product; and ultrasonically treating or heat-treating the raw material-solution system to obtain the functionalized nanosheets, wherein the raw material-solution system comprises 5 to 10 parts by weight of molybdenum disulfide nanosheets, 1 part by weight of the intermediate product, and brine; and the first compound comprises an oxirane group and an alkylamine chain, wherein the alkylamine chain has 12 to 18 carbon atoms and the oxirane group has 2 to 15 carbon atoms. A nanofluid prepared from the functionalized molybdenum disulfide nanosheets can reduce oil / water interfacial tension, has good stability, significantly improves the recovery rate of low-permeability oil reservoirs, and reduces costs.

Provided are a wafer cleaning method capable of uniformly cleaning an entire area of a wafer, and a wafer cleaning apparatus to which the method is applied. The method includes positioning a cleaning tool to face a surface of the wafer requiring cleaning; supplying a cleaning liquid containing ions to an area between the wafer and the cleaning tool; adjusting a spacing between a surface of the wafer and the cleaning tool for a viscosity of the cleaning liquid therebetween to be controlled by an electric field; and relatively rotating the wafer from the cleaning tool while the electric field being applied to at least a portion of the cleaning liquid, thereby cleaning the surface of the wafer with the cleaning liquid.

The invention relates to a micro-channel thermal management structure for a power management chip and a low-temperature bonding process of the micro-channel thermal management structure, and belongs to the field of semiconductor packaging, the micro-channel thermal management structure comprises a DC-DC converter wafer, a digital control wafer, a TSV silicon through hole array and a snakelike micro-channel, and the micro-channel thermal management structure is characterized in that the TSV silicon through hole array is arranged between the DC-DC converter wafer and the digital control wafer; the TSV array and the snakelike micro-channel are arranged in a staggered manner at an included angle of 30 + / -5 degrees, and the width tolerance of the channel is less than or equal to + / -1.5 [mu] m; the micro-channel is filled with ammonia water-based nanofluid, the volume concentration is 5%-8%, and the micro-channel heat management structure comprises a gradient porosity copper / graphene composite layer. The problems that although an existing chip structure is provided with a micro-channel heat dissipation structure, the heat dissipation effect is limited due to the fact that the micro-channel heat dissipation structure and TSV through holes are not designed cooperatively, the graphene heat dissipation film interface contact resistance is high, and the actual heat dissipation performance is poor are solved.

This application discloses a nanofluid, its preparation method, and its applications. The nanofluid comprises, by mass fraction: 0.01% to 0.7% modified nanoparticles, 1% to 4% surfactant, 0.2% to 0.6% polymer, and 0.01% to 0.2% short-chain alkanes, with the balance being water. The nanofluid provided in this application, through the synergistic effect between specific components, can significantly improve C / W foam stability and enhance oil recovery. Foam displacement agents prepared using this nanofluid can improve permeability and asphaltene content after displacement, exhibiting good overall performance.

A kind of solid-liquid two-phase nanofluid cooling fluid optimization method for machine tool spindle dynamic cooling, first carry out the sensitivity / correlation analysis of parameter variable, find out the nanofluid parameter that is strongly related to convective heat transfer characteristics;Then describe the percolation structure of nanoparticle aggregation, based on thermal conductivity model and effective viscosity model into finite element simulation;Then analyze and determine the key parameters of nanofluid in spindle cooling, qualitative selection of the optimization combination of key parameters;According to the "two-step method", nanofluid is prepared, and convective heat transfer experiment is carried out for nanofluid, and the experimental results of nanofluid are compared transversely, and the nanofluid with maximum average convective heat transfer coefficient is selected quantitatively;The present application greatly improves the convective heat transfer rate of the cooling fluid in the machine tool spindle, makes the precision machine tool spindle thermal error in high-speed machining long-term stable, and then eliminates the influence of spindle thermal error on machining precision of machine tool through tool.

The application discloses a preparation method of a high-stability cellulose nanofluid film, and a product and application thereof, and belongs to the field of energy conversion and material science. The method comprises the following steps: adding modified cellulose into an ionic liquid to prepare a solution by heating; dropping and coating the solution onto the surface of a porous polymer film, and preparing a gel film by heating and vacuum treatment; and obtaining the nanofluid film after water soaking and drying of the gel film. The nanofluid film adopts an embedded structure, the cellulose layer is a small-pore structure, the porous polymer film is a large-pore structure, and the nanofluid film has etching and three-dimensional network channel structures. The preparation process is simple and the conditions are mild, the prepared film has excellent ion rapid selective transmission performance, acid-base stability and long-term operation stability, can efficiently convert salinity gradient energy into electric energy, and has a good application prospect in the field of salt-difference osmotic energy utilization.

A method of preparing an enhanced oil recovery composition is described. The method includes carbonizing a waste plastic material to provide carbon microparticles, functionalizing the carbon microparticles with a SO3-containing gas such that the carbon microparticles have a hydrophilic surface, and grinding the carbon microparticles to provide carbon nanoparticles. The carbon nanoparticles have a hydrophilic surface and a hydrophobic surface. A method of enhanced oil recovery is also described.

This invention discloses a ternary composite oil displacement system based on the synergistic effect of nanofluids and polymers, belonging to the field of petroleum extraction technology. It includes a pretreatment unit, a nanofluid supply unit, a temperature- and salt-resistant polymer supply unit, a composite mixing unit, an online synergistic injection unit, and a formation synergistic displacement unit. The outlet of the pretreatment unit is connected to the composite mixing unit, and the nanofluid supply unit and the temperature- and salt-resistant polymer supply unit are connected in parallel to the composite mixing unit. Through the synergistic effect of nanofluids and temperature- and salt-resistant polymers, multiple synergistic effects of "dispersion stabilization, viscosity enhancement, seepage control, and residual oil stripping" are achieved. The modified nanoparticles and temperature- and salt-resistant polymer molecules form hydrogen bonds and electrostatic adsorption complexes, which not only significantly improve the solubility and viscosity stability of the polymer in high-temperature, high-salinity formation water environments but also prevent polymer molecular chain degradation.

The invention belongs to the technical field of carbon dioxide capture and regeneration, and particularly relates to a magnetic nanofluid pseudo-homogeneous-microwave synergistic carbon dioxide desorption method. The invention provides an application of a nickel ferrite material as a catalyst in carbon dioxide absorption pregnant solution regeneration. According to the invention, the carrier-free and undoped spinel-type structure NixFe3-xO4 is used as a catalyst for carbon dioxide absorption rich liquid regeneration, and the catalyst has microwave absorption, catalytic activity and magnetic responsiveness. According to the desorption method provided by the invention, the nickel ferrite material forms a stable quasi-homogeneous dispersion system in the carbon dioxide absorption rich solution, and then under the conditions of low-temperature microwave radiation and stirring, the CO2 desorption load rate reaches more than or equal to 55% within 10-30 min, the desorption reaction rate is increased by more than or equal to 20% compared with that of traditional thermal regeneration, and the desorption time is reduced by more than half compared with that of traditional thermal regeneration.

The invention discloses a method for improving seepage and heat transfer capacity of an oil sand reservoir by using hydrophobic carbon nanotubes. The method comprises the following steps: configuring any combination of M carbon nanotubes and N carbon nanotubes with different concentrations; drilling an underground rock core of a reservoir section on site in an oil field, obtaining a standard rock core column indoors, and testing the heat conduction coefficient of the standard rock core; the standard rock core columns are soaked in the carbon nano tube nanofluid, fluid pressure is set through a supercharger, and the heat conduction coefficient of the soaked rock core columns is tested; calculating the heat conduction strengthening coefficient of each rock core column soaked by the carbon nanotube nanofluid, and drawing a scatter diagram; on the premise that the heat conduction strengthening effect and economical efficiency are comprehensively considered, the optimal type and concentration of the carbon nano tubes matched with a construction stratum are screened and determined, and a large number of carbon nano tube nanofluids of the type are configured according to site requirements; and reasonably controlling the wellhead pressure of the well I and the well P to gradually and slowly squeeze the carbon nanotube nanofluid into the oil sand reservoir. The problem that in an existing oil sand liquid squeezing technology, the heat convection effect of a reservoir is poor is solved.

The application discloses a kind of determination device and method of heat conducting oil-based magnetic nanofluid coking speed, it is related to with heat conducting oil as heat transfer medium in the technical field of medium-temperature solar thermal power generation system, oilfield ground gathering and transportation heating system etc., the method comprises: after heating heat conducting oil tank inside heat conducting oil-based nanofluid by electric heater, it is transported to steel pipe by heat conducting oil pump, the strength of magnetic field is adjusted by adjusting the number of magnetic block and the distance between adjacent magnetic blocks, different intensity magnetic field is applied to the fluid received in steel pipe;The coking product on the first hanger sheet in heat conducting oil tank and the second hanger sheet in steel pipe after applying for a period of time is dried respectively, the mass of coking product in two states before and after applying magnetic field is obtained, so as to calculate the coking speed;By changing magnetic field, the turbulence degree of heat conducting oil can be increased, the convective heat transfer coefficient can be improved, the fluid heat transfer can be strengthened, the formation of heat conducting oil coking can be slowed down, and the service life can be prolonged.

This invention discloses a thermal field temperature equalization control method and system based on aerodynamic layout optimization, belonging to the field of thermal field temperature control technology. The method is applied to a gas delivery system in semiconductor thin film deposition processes, including: constructing an aerodynamic-thermal field coupling model to quantitatively analyze the influence of pipeline geometry on the temperature field; physically optimizing the pipeline structure based on the analysis results to reduce airflow disturbance; deploying a sensor network and implementing dual-domain collaborative dynamic control, combining a fuzzy PID algorithm to stabilize airflow, and using a model predictive control algorithm to pre-adjust heating power to compensate for thermal hysteresis; embedding microchannel heat exchangers filled with phase change materials and nanofluids in areas with the risk of instantaneous thermal disturbance to suppress temperature spikes; and performing self-optimization through a digital twin. This invention can systematically improve gas temperature uniformity, response speed, and long-term stability from source to end, meeting the stringent requirements of semiconductor processes.

This invention provides a method for preparing a high-salinity zinc oxide-resistant nanofluid mediated by Halomonas sp. and its application in enhancing oil recovery. Specifically, it includes: a Halomonas sp. strain CDH-2, with accession number CCTCC NO: M 2025786, which can rapidly grow in high-concentration salt solutions and produce salt-resistant extracellular metabolites. Fermenting and culturing CDH-2 under high-salt conditions yields a fermentation broth with a surface tension below 30 mN / m. Mixing and culturing the obtained fermentation broth with a metal precursor solution yields a high-salinity-resistant metal nanofluid. The resulting metal nanofluid maintains good stable dispersibility in high-salinity water and effectively reduces oil-water interfacial tension. It alters the wettability of oil-wetting surfaces, emulsifies and disperses crude oil, and reduces crude oil viscosity. Therefore, it can be used as an enhanced oil recovery agent in high-salt reservoirs and is widely applied in oilfield flooding, well huff and puff, and heavy oil viscosity reduction.

The invention relates to the technical field of petroleum and natural gas exploration and development, in particular to nanoparticles and a method for evaluating adsorption characteristics of the nanoparticles on the surface of gas reservoir sandstone, and the method comprises the following steps: collecting a target gas reservoir sandstone core sample and preparing a fluorine-containing group functionalized SiO2 nanofluid; carrying out a static wetting contact angle determination experiment, and analyzing and determining the surface wettability of the rock slice soaked by the fluorine-containing group functionalized SiO2 nanofluid; a rock core displacement experiment is carried out, and the seepage capacity of the liquid in the saturated N2 rock core before and after the fluorine-containing group functionalized SiO2 nano-particle fluid is soaked is studied. The method solves the problem that the traditional adsorption characteristic experiment method of the polymer on the sandstone surface cannot systematically research the rock core imbibition characteristics and displacement characteristics before and after wettability reversal, and provides theoretical basis and technical support for relieving retrogression damage and improving the recovery ratio of condensate oil.

The invention discloses a high-efficiency low-energy-consumption solvent for removing organic sulfur in gas as well as a preparation method and application of the high-efficiency low-energy-consumption solvent, and belongs to the technical field of gas purification. The solvent is formed by compounding a physical absorption organic solvent, a chemical absorption alcohol amine solution and a nitrogen-doped activated carbon catalyst nanofluid. The nitrogen-doped activated carbon catalyst is prepared by taking coconut shell or shell activated carbon as a raw material, mixing the coconut shell or shell activated carbon with a high-content nitrogen compound, pickling, drying, grinding and calcining by a specific procedure, and the surface of the nitrogen-doped activated carbon catalyst is rich in nitrogen-containing functional groups. When the catalyst is dispersed in an alcohol amine-organic solvent mixed system, a stable carbon nanofluid can be formed, and the heat transfer and mass transfer performance of the system can be remarkably improved. The solvent integrates the advantages of physical absorption and chemical absorption, and shows high absorption capacity and rate in the desulfurization process by virtue of the synergistic effect of the nanofluid; in the regeneration process, the heat and mass transfer efficiency is improved, so that the energy consumption is obviously reduced, and the method is particularly suitable for treating industrial gas containing organic sulfur.

The present application relates to the technical field of fluid heat dissipation, in particular to a method, device, equipment and medium for analyzing heat transfer characteristics of nanofluid. The present application constructs a velocity calculation formula based on a power-law fluid model, then applies the velocity calculation formula to the slip length, fluid attribute information and pipeline attribute information to obtain the flow velocity of the nanofluid in the micro pipeline, then calculates the average temperature of the nanofluid in the micro pipeline based on the flow velocity, and finally calculates the Nusselt number of the nanofluid in the micro pipeline based on the average temperature. Since the power-law fluid model can describe the non-Newtonian characteristics of the nanofluid, and the non-Newtonian characteristics are suitable for the heat transfer characteristics of the nanofluid in the micro pipeline, the flow velocity, average temperature and Nusselt number of the present application can describe the heat transfer characteristics of the nanofluid in the micro pipeline, so that the present application can apply the nanofluid to microscale cooling.

The invention provides a port oil spilling sewage treatment method and device, and relates to the technical field of port sewage treatment. The method comprises the following steps: gathering dispersed oil drops in sewage through an acoustic standing wave field to form an oil drop aggregate; injecting a magnetic nano-fluid of which the surface is modified with a bionic coating to form an oil drop-magnetic nano-particle complex; applying a gradient magnetic field to directionally migrate the complex; separating the migration complex from the water phase to obtain oil stain and purified water; and finally, the oil stains are desorbed from the surfaces of the magnetic nano-particles, and the magnetic nano-particles are recovered. According to the method, through the synergistic effect of acoustic aggregation, magnetic adsorption, magnetic field migration and multi-stage separation, efficient separation of oil drops and cyclic utilization of materials are achieved, and the method has the advantages of being high in treatment efficiency, environmentally friendly and low in cost.

The dynamic programmable nanofluid memristor comprises a tubular channel and a flexible built-in block, the tubular channel is filled with an electrolyte solution, and the inner surface of the tubular channel and the outer surface of the built-in block have hydrophilicity; the sizes of the tubular channel and the built-in block are gradually changed and have opposite changing directions, the built-in block is in clearance fit with the interior of the tubular channel to form a nanometer channel of a double-cone nested structure, the nanometer channel comprises a parallel section and a conical section, the size of the parallel section is smaller than that of the conical section, and the conical section is larger than the parallel section. The memristive effect is triggered by the ion concentration difference of the parallel section and the conical section under the action of an external electric field, the strength of the memristive effect is regulated and controlled by changing the lengths of the parallel section and the conical section, the dynamic regulation of the memristive performance is realized, and the memristive device has the advantages of high stability and reliability, flexible regulation and control mode, strong designability and the like.

This application relates to the field of liquid cooling technology, and discloses a highly stable, anti-sagging liquid-cooled composite nanofluid and its preparation method. The composite nanofluid comprises: deionized water and 1,2-propanediol as the continuous phase, graphene and single-walled carbon nanotube composite particles as the dispersed phase, and introduces a ternary rheological control system composed of a rheology modifier, polyvinylpyrrolidone, and a polymeric dispersant in a specific ratio, endowing the fluid with thixotropic and anti-sagging properties. This application improves the overall service stability and thermal management reliability of the liquid-cooled composite nanofluid under alternating high-speed pumping and static shutdown conditions.