719 results about "Convective heat transfer" patented technology

The invention discloses a thermal management strategy management method and system based on an energy storage battery system, and relates to the technical field of battery thermal management, and the method comprises the steps: collecting temperature data, carrying out the preprocessing, generating and recording a measurement result and a convective heat transfer coefficient, taking the measurement result and the convective heat transfer coefficient as the input of a Kalman filter, and outputting an optimal estimation result of a battery. The temperature data refer to the environment temperature and the core temperature of the single battery, based on the optimal estimation result of the battery, establishing a fuzzy rule base for iteration and updating, outputting a dynamic temperature difference threshold value, constructing a three-dimensional thermodynamic potential function, calculating the cosine similarity of a cooling driving force vector and a cooling mode, and correcting the cosine similarity to obtain a cooling driving force vector. The mode switching list is generated, the cooling equipment decision mode is generated, starting judgment and optimization of the cooling mode are carried out, and the intelligent level, safety and energy efficiency ratio of thermal management of the energy storage battery system are remarkably improved.

The invention discloses a method and a system for monitoring the temperature of an energy storage battery in a high-altitude area. Through environment adaptive feature reconstruction, thermodynamic model correction and multi-frequency EIS fusion feature extraction are utilized to generate a feature vector adaptive to the plateau environment. The thermodynamic model correction adjusts the convective heat transfer coefficient by introducing an air pressure correction coefficient; the multi-frequency EIS fusion feature selects a specific frequency point impedance value to construct a vector, and the weight is dynamically adjusted through a random forest algorithm. The lightweight hybrid machine learning model integrates the advantages of LightGBM, 1D-CNN and a physical constraint particle filter model, and realizes accurate prediction for different working conditions. The plateau exclusive training mechanism covers data enhancement, transfer learning and online calibration, and the generalization ability and adaptability of the model are improved. According to the method, the problems of low temperature monitoring precision and poor model adaptability of the energy storage battery in the high-altitude area are solved, the monitoring precision and the system reliability are remarkably improved, and a guarantee is provided for safe and stable operation of a high-altitude energy storage system.

The invention relates to the technical field of industrial temperature measurement, in particular to a high-temperature heating body hearth temperature distribution measurement method, which comprises the following steps of: establishing a quantitative mapping relation model between real-time input electric power and theoretical heating intensity of a heating body; a limited number of temperature sensor arrays are arranged at key positions of the internal space of the hearth; synchronously acquiring a real-time temperature measurement value of the temperature sensor array and real-time input electric power data of the heating body; calculating and generating theoretical temperature field distribution covering the three-dimensional geometric model; obtaining a corrected temperature value; calculating the temperature residual error of the corrected temperature value and the theoretical temperature field distributed at the corresponding position of the sensor; expanding the discrete temperature residual error into a full-space three-dimensional residual error distribution field; and outputting the three-dimensional real-time temperature distribution field of the hearth. Dynamic lag compensation and convective heat transfer compensation algorithms are adopted, lag and errors in measured values can be corrected in real time, and it is ensured that measured data at high temperature have high response speed and accuracy.

The invention discloses a smart city energy management system based on energy conservation and emission reduction, and relates to the technical field of smart city energy management. By using an intelligent sensor group, illumination related data of illumination equipment is obtained, an illumination related data set R is constructed, and a light attenuation factor Gs, a convective heat transfer index DL and a use intensity factor Qd are extracted; the method comprises the following steps: dynamically evaluating the thermal load intensity of an urban area, scientifically dividing thermal risk grades, combining performance brightness prediction and control strategy matching to realize subarea and lamp-divided refined dimming control, using a feedback self-evaluation and optimization regulation and control mechanism, carrying out power reestimation and strategy alternation on an area with a substandard control effect, and carrying out power control on the area with the substandard control effect. Redundant energy consumption is effectively reduced, heat accumulation is restrained, and the lighting efficiency and the environment comfort degree are improved.

The invention provides a permafrost region ventilation pipe foundation design method based on a heat balance principle, and aims to keep heat balance of permafrost on the lower portion of a foundation and ensure long-term heat stability of the foundation. According to the method, meteorological data, soil physical parameters and permafrost upper limit and ground temperature distribution information are collected so as to evaluate whether additional protection measures are needed or not and determine the burying height of the ventilation pipe foundation. And based on the selected ventilation pipe configuration, the air speed in the pipe is calculated by using a corresponding air speed calculation formula, and the convective heat transfer coefficient is determined accordingly. And determining the diameter of the pipeline by combining the convective heat transfer coefficient and the economical efficiency. And the cooling radius and the optimal operation mode of the ventilation pipe foundation are further determined, so that heat balance at the bottom of the foundation is ensured, and permafrost at the lower part of the foundation is effectively protected. The design method is simple, convenient, rapid and accurate, and has important engineering application value and wide applicability.

A worm and worm gear pair heat-fluid-solid coupling analysis method comprises the following steps that 1, a heat-fluid-solid coupling simulation analysis model of a worm and worm gear pair is built, and a three-dimensional geometric model is built based on the worm and worm gear meshing principle; 2, parameterized grid division is carried out on the simulation analysis model, a tetrahedral unstructured grid is adopted for a fluid domain, and a worm and worm gear tooth surface area is densified; 3, based on the fluid dynamics theory and an RNG # imgabs0 # turbulence model, establishing an oil-immersed lubricating oil gas two-phase flow transient simulation model, and solving fluid dynamic pressure and a convective heat transfer coefficient through a pressure-speed coupling algorithm; 4, establishing a three-dimensional transient dynamic simulation model based on a solid mechanics theory, combining a temperature-stress coupling field equation, adopting an explicit dynamic algorithm, and iteratively solving thermal deformation and stress strain of the worm and the worm gear through a finite element method; and 5, bidirectionally transmitting the pressure of the fluid domain, the convective heat transfer coefficient and the thermal deformation data of the solid domain through the fluid-solid interface, and carrying out iterative solution until convergence.

The invention discloses a lithium battery thermal parameter online monitoring method and equipment. According to the method, a one-dimensional heat transfer model of the battery is established, and a finite element model is solved by inversion of battery surface temperature change actually measured in operation, so that combined monitoring of the heat conductivity coefficient, the convective heat transfer coefficient, the average temperature and the heat production power P of the lithium battery is realized. Meanwhile, only the temperature sensor needs to be arranged on the surface of the battery, the battery does not need to be disassembled or an internal sensor does not need to be implanted, the battery integrity is kept, and the method is suitable for battery full-life-cycle monitoring. According to the method, the key thermal parameters of the lithium battery can be identified online in a non-intrusive, low-cost and high-reliability manner, support is provided for thermal management, health assessment and thermal safety early warning of the battery, and the method is suitable for various battery configurations and thermal management systems.

Disclosed is a collaborative design system and method for a thermophysical property gradient distribution and a braided structure of a CMC and a storage medium. The system comprises at least one storage medium and at least one processor. The at least one processor is configured to: generate a temperature field parameter of a surface of a CMC turbine blade under a non-uniform inflow condition based on a simulation analysis platform, and extract a convective heat transfer coefficient; partition the CMC turbine blade and import an extracted fluid-solid heat transfer boundary condition into an optimization platform; perform multi-objective optimization on the thermophysical property gradient distribution of the CMC turbine blade under the non-uniform inflow condition based on an optimization simulation tool; and generate C nanotube contents of different regions of the CMC turbine blade based on a correspondence function and values of material thermal conductivities of the different regions of the CMC turbine blade to realize the collaborative design of the thermophysical property gradient distribution and the braided structure of the CMC.

The utility model discloses an immersed battery thermal management system which comprises a battery, a columnar shell internally provided with a battery pack, and a spiral pipe liquid flow channel wrapped outside the battery pack, the two ends of the columnar shell are sealed by flange end sockets, a closed cavity is formed in the columnar shell and filled with cooling liquid, and the flange end sockets are provided with a liquid inlet pipeline, a liquid outlet pipeline and a wiring port. The spiral pipe liquid flow channel is soaked in cooling liquid, the outer edge of the spiral pipe liquid flow channel is in direct contact with the inner wall of the columnar shell, and the inner edge of the spiral pipe liquid flow channel is a battery pack placing space; the battery pack is formed by connecting a plurality of single batteries in series and in parallel, and the periphery of each single battery is coated with a sealant coating; according to the battery heat management system, heat transfer between a battery and the external environment is achieved through heat convection, and therefore heat exchange is achieved; according to the utility model, the cooling effect of the power battery is improved by utilizing a flow heat exchange mode, and the device is different from a traditional large-scale immersed liquid cooling device, and the lightweight design in the power battery design is highlighted.

The multi-field coupling collaborative modeling and parameter autonomous intelligent decision-making method for the roller type quenching process comprises the steps that four key process parameters including the nozzle flow, the water ratio, the roller gap distance and the plate passing speed are collected and subjected to normalization preprocessing, and a training set and a test set are divided; the four key process parameters of the training set serve as input, the water-cooling convective heat transfer coefficient and the phase change plasticity coefficient serve as output, a BP neural network is trained, and the workpiece surface water-cooling convective heat transfer coefficient and the material internal phase change plasticity coefficient are predicted through the trained BP neural network; a multi-field coupling model composed of a temperature field, a structure phase change field and a stress-strain field is solved, and quantitative calculation of quenching core quality indexes is achieved; by taking water consumption minimization as a target, constructing a nonlinear optimization model under the condition that multiple core quality index constraints of the plate temperature, the outlet hardness and the plate shape are met; and performing global optimization on the optimization model by adopting a differential evolution algorithm, and autonomously deciding an optimal process parameter set value.

The invention discloses a parallel computing simulation method for thermal exploitation of a buried pipe well group in a geothermal reservoir, which comprises the following steps of: dispersing a grid volume unit of a buried pipe by adopting a parallel finite element unit method, and simplifying the buried pipe and circulating fluid in the pipe into a one-dimensional linear finite element unit; constructing a plurality of pipeline flow models arranged in an array, and combining the in-pipe one-dimensional linear units and the out-pipe three-dimensional volume units to obtain a well group type pipeline flow geometric model; a parallel finite element unit method is adopted to be combined with a non-isothermal pipeline flow physical field, an underground water seepage physical field and a porous medium heat transfer physical field to conduct multi-physical-field coupling, and a well group type pipeline flow numerical model is obtained; fluid flow and convective heat transfer in the buried pipe and pipe wall heat conduction are solved in a combined mode; and performing factor sensitivity analysis by changing different thermophysical parameters of the rock-soil body and heat exchange characteristic factors of the buried pipe well group. The invention provides a new method for researching fluid flowing and heat transfer behaviors of the buried pipe well group, and provides a new idea for optimal design and efficient simulation of thermal exploitation of the buried pipe well group in a geothermal reservoir.

The invention discloses a synchronous reluctance motor magnetothermal coupling rapid calculation method based on a dynamic thermal network, and belongs to the technical field of motors. Comprising the following steps: calculating motor loss by adopting a finite element electromagnetic field model, and calculating a convective heat transfer coefficient by adopting a finite element fluid field model; constructing a three-dimensional thermal network comprising conduction, contact, convection thermal resistance, thermal capacity and a heat source, and solving to obtain an average temperature and a boundary temperature of component nodes; constructing a sub-domain temperature field calculation model of the heat source component, and calculating temperature distribution in combination with boundary conditions; introducing average temperature compensation thermal resistance and carrying out dynamic correction; carrying out magnetothermal coupling iteration, and updating the loss and the temperature until the precision is met; and introducing maximum temperature compensation thermal resistance into the thermal network, and solving to obtain an average temperature and a maximum temperature transient temperature rise curve of each component. Based on the technical means of combining electromagnetic field and fluid field finite element simulation with thermal network and subdomain temperature field calculation, efficient calculation of magnetothermal coupling of the synchronous reluctance motor is achieved.

The invention belongs to the technical field of porous medium combustors, and particularly relates to a model selection construction method of a periodic cell body structure of a porous medium combustor, which comprises the steps of constructing a heat transfer device, constructing a cell body unit to be selected, installing the cell body unit to be selected, measuring data parameters, analyzing results and the like. From a plurality of perspectives of convective heat transfer coefficient, area excellent factor, effective heat conductivity coefficient, longitudinal diffusion coefficient and the like, the performance of the porous medium burner can be influenced by using different periodic cell body structures under the condition of the same porosity; the invention further provides a model selection construction method for the periodic cell body structure when the porosity is the same, a theoretical basis is provided for model selection of the periodic cell body structure of the porous medium burner, and several periodic cell body structures recommended to be constructed and used under common porosity conditions are given.

The invention discloses a PINN-based grinding temperature prediction method and a transfer learning model, and belongs to the field of slow feed grinding and the technical field of neural networks. The method comprises the following steps: establishing an unsteady state heat conduction control equation, and defining a composite boundary condition; calculating the heat flux density of a heat source based on set grinding process parameters and workpiece material characteristics; constructing a PINN temperature prediction model; based on sparse temperature measurement data, a gradient optimization algorithm is adopted to dynamically invert and correct a heat conduction coefficient and a convective heat transfer coefficient; establishing a transfer learning mechanism, and accelerating solution of a PINN temperature prediction model under a new working condition; high-risk regions exceeding the critical damage temperature of the material are identified based on the predicted temperature field, and processing parameters are optimized to prevent grinding burns. According to the method, the unsteady heat conduction equation is embedded into the neural network, empirical formula constraint is replaced, and the physical consistency of the dynamic process is ensured; meanwhile, the method can achieve the inversion of key physical parameters based on a very small number of temperature measurement points, and solves a problem of boundary condition uncertainty.

The utility model belongs to the technical field of new energy automobiles, and particularly discloses a new energy automobile high-pressure liquid heater which comprises a heater body, a thick film heating plate, a heat insulation plate, a cover plate and an overheating protection circuit which are sequentially installed from bottom to top. The overheating protection circuit comprises four thermistors Rt1, Rt2, Rt3 and Rt4, an N-type MOS tube, a relay KJ, a heating resistance wire Rh, a resistor R1, a resistor R2, a resistor R3, a low-voltage direct-current power supply and a high-voltage direct-current power supply. According to the thick film heating plate, the water-drop-shaped turbulent flow columns and the turbulent flow teeth are arranged, so that the heat conduction efficiency and the heat exchange efficiency of the thick film heating plate in liquid are improved, and better convective heat exchange is realized; and the overheating protection circuit is arranged, so that the reliability of the heater during over-temperature protection is improved, and the heater is not only controlled by software.

The invention discloses a photovoltaic module with an enhanced passive heat dissipation structure, belongs to the technical field of photovoltaic modules, and aims to solve the problem that the photoelectric conversion efficiency of the photovoltaic module is reduced due to temperature rise. The assembly comprises a photovoltaic cell panel assembly, a first fin group and a second fin, wherein each first fin group consists of four parts, namely a first sub-fin, a second sub-fin, a third sub-fin and a fourth sub-fin, the first fin groups are arranged in rows, and the second fins are arranged between the adjacent first fin groups in each row. The photovoltaic module with the enhanced passive heat dissipation structure has the beneficial effects that the photovoltaic module with the enhanced passive heat dissipation structure is reasonable in structure and feasible in technology, heat dissipation can be effectively improved by adopting passive heat transfer modes such as unpowered natural convective heat transfer and radiation heat transfer, autonomous cooling of the photovoltaic module is realized, the photoelectric conversion efficiency of the photovoltaic module is improved, and the service life of the photovoltaic module is prolonged. And the generating capacity of the photovoltaic field station can be improved.

The invention provides a temperature compensation error elimination method in a full-automatic transformer transformation ratio test, and belongs to the technical field of transformers. A heat conduction coefficient matrix, a convective heat transfer coefficient matrix and a radiation form factor matrix are utilized to construct a temperature field dynamic evolution equation set, and a neural network compensation model combining a multi-layer perceptron architecture and an attention mechanism is adopted. A hierarchical fusion weight is dynamically adjusted based on a thermal gain stability matrix eigenvalue, a temperature gradient vector modulus length and a thermal capacity matrix condition number through a gating weight function, compensation parameters are adjusted in advance by using a temperature field prediction algorithm, and continuous improvement of measurement precision is realized through a temperature compensation effect evaluation mechanism and a dynamic parameter optimization strategy. The technical problems that the measurement precision is reduced and accurate temperature compensation cannot be realized due to temperature change in the transformation ratio test process of the transformer are solved.

The invention provides a registration type battery thermophysical parameter measurement method. A battery to be measured and a standard component group with known thermophysical properties are placed in the same air environment for synchronous heating and temperature measurement. The simulation curve and the actually measured temperature curve of the standard component are overlapped through the registration technology, the convective heat transfer coefficient of the environment is accurately inverted, and the function relation of the convective heat transfer coefficient is established. The function relation is applied to the battery to be tested, heat lost by convective heat transfer is compensated, and the specific heat capacity and the heat conductivity are synchronously obtained through one experiment process. According to the invention, the dependence of a traditional measurement method on a vacuum insulation environment is broken through, the problems of high measurement cost, low efficiency and poor data collaboration in the prior art are solved, and high-precision integrated measurement in a common environment is realized.

The utility model relates to the technical field of air conditioners, particularly provides an air conditioner outdoor unit and an air conditioner, and aims to solve the problem that an existing air conditioner outdoor unit is poor in heat dissipation effect. In order to achieve the purpose, the air conditioner outdoor unit comprises a machine shell, the interior of the machine shell is provided with a partition plate, and the partition plate divides the internal space of the machine shell into a first cavity and a second cavity; the condenser is arranged in the first chamber; the electric control assembly is connected with the partition plate, and one end of the electric control assembly extends into the first cavity and is connected with a radiator; and the partition piece is arranged between the condenser and the radiator. The air flow passing through the radiator can be adjusted from a laminar flow state to a turbulent flow state, so that the convective heat transfer coefficient between the air flow and the radiator is increased, the heat exchange efficiency is enhanced, and stable operation of the electric control assembly is facilitated.

According to the device for reducing the temperature rise of the dry-type hollow high-capacity current-limiting reactor and the design method thereof, a double-layer rainproof device technology and a split type staggered ventilation structure are adopted to realize rainproof and heat dissipation decoupling; according to the invention, heat dissipation is carried out through annular grating ventilation holes in the vertical direction of a top-layer rainproof cap and a middle ventilation net between the top-layer rainproof cap and a bottom-layer rainproof cap, and a coupling simulation technology of a magnetic field-flow field-temperature field of a reactor is utilized to form a correlation between structural parameters of a double-layer rainproof device and a flow rate change rate of fluid in an air passage of an encapsulation chamber; a bidirectional coupling model of a flow field and a temperature field is established, and the synergistic effect of encapsulated radiation and convective heat transfer is solved through a finite element method. Through multi-field coupling simulation and parametric modeling, the problem of collaborative optimization of rainproof device design and electric reactor thermal performance is solved, the equivalent heat dissipation area is increased to 2-3 times that of a single-layer structure, the use amount of wires is reduced by 8-15%, the coil hot-spot temperature rise is reduced to 78K from 88K of a traditional structure, and the reduction amplitude reaches 11.4%.

The invention discloses a device and a method for simulating heat exchange and friction resistance measurement of an aviation high-speed motor under different working conditions, and relates to the field of heat management of high-speed rotating equipment. An additional heating sheet is attached to the outer surface of the inner rotor, and different surface structures are detachably assembled on the outer rotor to form a stator and rotor slit flow channel boundary; cooling liquid forms one-inlet and one-outlet forced convection through the radial through hole of the end cover. The rotating speed larger than or equal to 20,000 rpm, runner pressure drop and temperature data are synchronously collected through an axle load type sensor, and the heat exchange coefficient, the flow resistance coefficient and the friction resistance coefficient are calculated in real time based on energy conservation, a Darcy formula and a torque empirical formula. A real rotor surface structure is reproduced under the condition of high-speed rotation, working medium leakage is restrained through mechanical sealing, and runner blockage caused by centrifugal deformation of the surface structure is prevented through the outer rotor designed in an integrally-formed mode; the obtained convective heat transfer-resistance coefficient-friction resistance coefficient all-parameter curved surface database can guide optimization of the cooling flow channel of the aviation motor.

The invention discloses a method for calculating the temperature of a rarefied flow field through convective heat flow and the surface temperature of a Gordon meter, and the method is used for measuring the incoming flow temperature of a rarefied fluid wind tunnel, and comprises the steps: installing the Gordon meter and a radiation heat flow meter on a moving motor at a certain interval, and controlling a measurement point through the moving motor, the measuring point is an area covered by the incoming flow direction; after a measuring point is selected, under the same working condition, a moving motor sequentially measures the total heat flow Q (average value) and the pure radiation heat flow qr of the measuring point, the heat flow average value Qc = Q-qr of convective heat transfer is obtained, and an infrared pyrometer is used for measuring the center temperature Tr = 0 of a Gordon meter; and calculating the incoming flow temperature Tf and the convective heat transfer coefficient h of the current measurement point according to the convective heat flow Qc and the constantan foil center temperature Tr = 0 of the Gordon meter. According to the invention, a simple structure is used for replacing a complicated measurement system of a conventional rarefied wind tunnel temperature measurement method, and the problem that in a highly rarefied wind tunnel, the signal of a spectrum temperature measurement method is weak, and the temperature measured by a thermocouple is difficult to reflect the actual temperature of a flow field is solved.

The present disclosure provides methods and divertors for plasma reactors. The divertors may comprise internal lattice structures to facilitate conductive and convective heat transfer and provide structural support to plasma facing surfaces of the divertor.

The invention discloses a multi-magnetic-source comb-shaped water tank magnetic liquid sealing device, and belongs to the field of mechanical engineering sealing. A first pole shoe, a second pole shoe, a third pole shoe and a fourth pole shoe which are provided with annular comb-shaped tooth grooves are alternately connected with a first permanent magnet, a second permanent magnet and a third permanent magnet in series, wherein the first permanent magnet, the second permanent magnet and the third permanent magnet are arranged in a manner that N-S-S-N-N-S magnetic sources are arranged in sequence or N-S-N-S-N-S-S-S-S-S magnetic sources are arranged in an inverted manner, and the multi-magnetic-source comb-shaped water tank sealing assembly is formed. Each pole shoe is provided with an annular cooling water tank, and spiral fins are machined on the bottom face and the side face of each cooling water tank, so that the effective heat exchange area in magnetic liquid sealing can be increased, convective heat transfer of cooling fluid is enhanced, the heat dissipation capacity is enhanced, the stable temperature of the magnetic liquid is kept, the sealing pressure resistance is improved, and the service life is prolonged. The installation mode that the multiple magnetic sources are sequentially arranged can compensate the weakening effect of the water tank on the magnetic field through magnetic field superposition, the magnetic field intensity difference value of the pole teeth is increased, and the sealing and pressure resisting capacity of the magnetic liquid is further enhanced.

A new type of high-efficiency liquid cooling cabinet for a data center server is provided. A new type of high-efficiency liquid cooling cabinet for a data center server includes a base plate, a cabinet, main boards, and memory strips, etc.; and the cabinet is welded on the upper part of the base plate, the front, left and right sides of the cabinet are open settings, seven main boards are evenly distributed up and down in the cabinet. By connecting the water inlet pipe from the outdoor to the coolant, the coolant enhances the convective heat transfer to cool the bottom chips, and the hot wind in the holes is cooled by the coolant flowing through the cavity of the six-hole heat-dissipation cavity device, finally, it is ensured that the main board and the memory strips may be cooled below the safe temperature simultaneously.

The invention discloses a temperature control management system of an intelligent medical cabin for high altitude, which comprises a multi-source data acquisition module, a power self-adaptive processing module and a temperature control management display module, relates to the technical field of medical environment control, and solves the technical problems of serious performance attenuation, low energy efficiency, rigid control strategy and poor adaptability. According to the method, the current altitude and the current atmospheric pressure serve as core input parameters, the heating capacity attenuation coefficient and the convective heat transfer coefficient of the heat pump are subjected to real-time and quantitative scientific correction, the limitation that a traditional system neglects changes of environmental physical characteristics is broken through, a heat load calculation model is converted into a plateau self-adaptive model from a plain model, and the calculation efficiency is improved. The calculated total heat load demand and the heat pump output power better meet the actual physical conditions of the plateau, and therefore it is guaranteed that the basic output capacity of the temperature control system is consistent with the design expectation.

The invention discloses a natural gas hydrate generation accelerant containing amino acid and nano calcium carbonate as well as a preparation method and application of the natural gas hydrate generation accelerant, and belongs to the technical field of natural gas hydrates. The problems of low natural gas hydrate forming rate, low gas storage density, low natural gas recovery efficiency, poor environmental protection property and the like in the prior art are solved. The accelerant is obtained by taking a hydrophobic amino acid solution as a base solution, adding nano calcium carbonate into the base solution and adjusting or not adjusting the pH value. By regulating and controlling the type and the concentration of a base solution in the accelerant, the hydrate formation rate and the gas storage density are improved, and the induction time of hydrate generation is shortened; nanoparticles in the accelerant are small in particle size and large in specific surface area, so that disturbance and convective heat transfer of the accelerant are enhanced; in addition, the chemical components of the nanoparticles in the accelerant and the main component of the seabed sediment with a large amount of natural gas hydrate in the nature are calcium carbonate, the environmental risk is reduced, and the calcium carbonate and hydrophobic amino acid are wide in source and environmentally friendly.

The utility model discloses a charging device, which comprises a mounting rack, a charging assembly and a fan assembly, the charging assembly and the fan assembly are respectively mounted on the mounting rack, the mounting rack is provided with a front surface and a back surface opposite to each other, the charging assembly is arranged on one side, close to the front surface, of the mounting rack, and the fan assembly is arranged on one side, close to the back surface, of the mounting rack. An air outlet is formed in the side, close to the back face, of the mounting frame. The fan assembly can accelerate the fluidity of airflow, so that the convection heat exchange effect is enhanced, the heat dissipation capability of the charging equipment is enhanced, and the influence of heating of the charging equipment on the charging efficiency is reduced; meanwhile, the charging assembly is arranged close to the front face, the front face is used for making contact with the electronic equipment, the air outlet is formed in the side, close to the back face, of the mounting frame, the fan assembly can drive airflow to be exhausted out of the charging equipment from the air outlet when working, and it is prevented that hot air obtained after heat exchange blows towards the electronic equipment to affect the charging efficiency of the electronic equipment; and hot air can be prevented from blowing to the hand of the user holding the electronic equipment, so that the use experience of the user is improved.

To improve heat quantity acquired from a sunlight heat collection panel.SOLUTION: A sunlight heat collecting system 1 includes: a sunlight heat collection panel 2 that has a non-heat insulation part 2c causing convection heat transfer with surrounding air and transfers radiation heat from the sunlight and convection heat from the surrounding air to a heating medium M; a heating medium circulation line 4 for sending the heating medium M from a heating medium tank 3 that stores the heating medium M to the sunlight heat collection panel 2 and sending the heating medium M from the sunlight heat collection panel 2 to the heating medium tank 3; a heating medium flowing control mechanism 5 that performs at least either of switching between permission and prohibition of flowing of the heating medium M along the heating medium circulation line 4 or regulation of a flow rate of the heating medium M; and a control device 9. The control device 9 measures radiation heat input quantity Q1 to the sunlight heat collection panel 2, measures convection heat transfer quantity Q2 between the sunlight heat collection panel 2 and the surrounding air, and controls the heating medium flowing control mechanism 5 on the basis of the radiation heat input quantity Q1 and the convection heat transfer quantity Q2.SELECTED DRAWING: Figure 1

The invention relates to the field of thermodynamics and fluid mechanics, and discloses a heat dissipation method and system for an ultra-thin small-size integrally-formed inductor, and the method comprises the steps: fitting an electromagnetic-thermal coupling analysis network of the integrally-formed inductor, calculating a core heat source of the integrally-formed inductor, and constructing a heat distribution diagram of the integrally-formed inductor. Determining the flow channel layout of the integrally formed inductor, analyzing the flow channel Nusselt number and the flow channel friction factor of the micro-flow channel corresponding to the integrally formed inductor, determining the flow channel geometric characteristics of the micro-flow channel, and constructing a micro-flow channel heat dissipation network of the integrally formed inductor; determining a circulating heat dissipation path of the micro-channel heat dissipation network, analyzing an equivalent heat conductivity coefficient of a heat dissipation medium corresponding to the micro-channel heat dissipation network, and calculating a convective heat transfer coefficient and a total heat dissipation amount of the micro-channel heat dissipation network so as to analyze the heat dissipation performance of the micro-channel heat dissipation network; and determining the circulation flow rate of the micro-channel heat dissipation network so as to execute circulation heat dissipation of the integrally formed inductor. The heat dissipation effect of the ultra-thin small-size integrally-formed inductor can be improved.