1846 results about "Convection flow" patented technology

The invention relates to the technical field of intelligent control, and discloses a self-adaptive temperature curve control system for high-temperature alloy vacuum casting, which comprises a sensing module, a control module and a control module, and is characterized in that the sensing module acquires multi-point temperature information and preprocesses the information to obtain temperature distribution in a furnace; the acquisition module obtains vacuum environment parameters. The simulation module establishes a three-dimensional dynamic coupling model based on heat conduction, radiation, convection and phase change heat effect, and obtains a real-time temperature evolution prediction result. The generation module obtains a target temperature curve of the corresponding stage. The prediction control module collects a real-time temperature evolution prediction result and a target temperature curve, deviation calculation and trend analysis are carried out, and a heating power and cooling flow control instruction is generated. And collecting product feedback errors and carrying out self-learning correction on prediction model parameters to obtain an optimized control output result. The control and optimization of the high-temperature alloy vacuum casting temperature field are realized, and the structure uniformity of castings and the quality stability of finished products are improved.

The invention discloses a single-phase immersed liquid cooling temperature stratification evaluation and disturbance liquid injection balance control system, and relates to the technical field of liquid cooling circulation structures. The single-phase immersed liquid cooling temperature stratification evaluation and disturbance liquid injection balance control system comprises a backflow liquid multi-point liquid inlet dynamic monitoring module used for collecting liquid cooling branch state data; the immersion liquid temperature layering monitoring module is used for evaluating the non-uniform degree of heat distribution and adjusting a disturbance liquid injection strategy; the liquid flow distribution equilibrium evaluation module is used for analyzing the matching degree of liquid flow distribution and heat dissipation and optimizing a flow direction coverage strategy; the cooling path dynamic judgment and switching module is used for evaluating the cooling state and the thermal load change and regulating and controlling the circulation path; and the immersed liquid cooling cabinet local disturbance self-balancing regulation and control module is used for guiding local convection and adjusting the disturbance direction. The problem that heat dissipation efficiency of a chip is affected by local heat accumulation in the immersed liquid cooling cabinet due to serious cold and hot lamination after backflow of a cooling liquid branch is solved.

The invention discloses a creep test system of a turbine rotor blade film hole simulation piece and a test method of the creep test system. Comprising a clamping assembly used for fixing a test piece, a loading assembly used for applying a load to the test piece, a strain measuring assembly used for measuring the strain rate of the test piece, a heating assembly used for covering the test piece to form a heating channel, and a cooling assembly used for manufacturing and conveying cooling airflow to flow through the interior of the test piece, the strain measurement assembly is used for measuring the external temperature of the test piece and the internal temperature of the test piece, the control assembly is connected with the strain measurement assembly, the heating assembly, the cooling assembly and the temperature measurement assembly, and the heating assembly is used for manufacturing and conveying high-temperature airflow to flow through the heating channel so as to heat the outside of the test piece to a first set temperature; the cooling assembly is used for cooling the interior of the test piece to a second set temperature, and the heating assembly and the cooling assembly are used for forming a dynamic convection environment around the test piece.

The invention relates to the technical field of bus ducts, and discloses an efficient heat dissipation bus duct with a waterproof function, which comprises an upper cover plate, a lower cover plate and conducting bars vertically arranged between the upper cover plate and the lower cover plate, the conducting bars are symmetrically arranged in groups, and a heat dissipation cavity is formed between the two groups of conducting bars; the upper cover plate and the lower cover plate are respectively provided with convection heat dissipation holes communicated with the heat dissipation cavity, and the convection heat dissipation holes and the heat dissipation cavity form an air convection air channel which is used for conducting convection heat dissipation on the conducting bar. According to the invention, the conductive bars are arranged at intervals to cooperate with the convection heat dissipation holes to form the convection heat dissipation cavity for the inner cavity of the bus duct, so that the efficient heat dissipation performance of the bus duct is ensured; through arrangement of the sealing strips and the hydrophobic protrusions, on the premise that the sealing performance of the conducting bar is guaranteed, water flow in the heat dissipation cavity can be prevented from flowing to gaps among the conducting bar, the inner heat dissipation plate and the cover plate, and the waterproof performance of the whole bus duct is improved.

The invention relates to the technical field of fire-fighting simulation, and discloses a fire-fighting fire dynamic simulation system based on multi-physics field coupling. The system collects temperature field distribution data, smoke concentration gradient data, airflow velocity field data and building structure heat conduction parameters of a fire scene; establishing a bidirectional coupling model of a temperature field and a smoke diffusion field, realizing dynamic correction of a smoke convection effect by a temperature gradient through real-time data exchange, constructing a correlation model of an airflow velocity field and a heat conduction parameter of a building structure, and adjusting a velocity field vortex coefficient according to heat flow intensity; integrating the bidirectional coupling model and the correlation model to form a multi-physical field joint calculation framework, and propelling a simulation process by adopting a discrete time slicing mode; and outputting a three-dimensional dynamic simulation map including a temperature field evolution track, a smoke diffusion path and an airflow disturbance range. The system can accurately restore the fire scene multi-physics field synergistic effect process, and provides effective support for fire rescue decision and building fire protection design.

The invention discloses a PINN-based transformer convective heat transfer coefficient acquisition method, system and device and a medium, and relates to the technical field of transformers, and the method comprises the steps: building a three-dimensional thermal field simulation model based on transformer structure parameters, obtaining temperature field data through multi-physics field coupling simulation, building a sample set, training a physical information neural network model, and obtaining the convective heat transfer coefficient of a transformer. A loss function is defined, through weight adjustment and optimization algorithm training, loss change is dynamically monitored, convective heat transfer coefficient distribution is inversed, an inversion coefficient is substituted into a thermal model for forward calculation, iterative optimization is performed through comparison with independent measurement data, and accuracy and applicability are verified through actually measured temperature data. According to the method, the dependence on experimental data is reduced, the high-precision and high-efficiency acquisition of the convective heat transfer coefficient of the spatial change of the transformer is realized, and a reliable technical means is provided for thermal design and state evaluation of the transformer.

The invention provides a cabinet three-dimensional temperature field monitoring method and device, and the method comprises the steps: arranging four temperature sensors at the positions of left and right columns at the rear part of a cabinet and the left and right middle positions of the rear side of the top of the cabinet respectively, and forming vertical and horizontal coordinate distribution points covering a key heat distribution region of the cabinet; collecting temperature data of the four temperature sensors at preset coordinate positions, and inputting the temperature data into a three-dimensional temperature field reconstruction algorithm model; processing the temperature data by adopting a bilinear interpolation method, and calculating the temperature value of any position in the cabinet; and according to a hot air convection rule, introducing height direction temperature gradient correction into the three-dimensional temperature field reconstruction algorithm model so as to eliminate the influence of heat convection on a temperature monitoring result. The three-dimensional temperature distribution in the cabinet can be accurately reflected, the temperature monitoring precision and real-time performance are improved, and the installation and maintenance cost is reduced.

The invention relates to the technical field of metal material heat treatment, in particular to a gradient temperature control method for a stainless steel cold rolling annealing process. Comprising the steps that an annealing furnace is divided into independent temperature control sections in the strip steel conveying direction, each temperature section is provided with an electric heating wire set, a forced convection cooling air duct and a high-precision infrared temperature measurement array, temperature data are collected in real time, and a target gradient temperature curve is generated; constructing a phase change power-temperature correlation model, and outputting a theoretical gradient temperature curve; a three-stage MPC is adopted to cooperatively control and output a control signal; and the heating power and the cooling strength are adjusted in real time according to the control signal, if the temperature fluctuation exceeds the limit, the power is compensated through a PID algorithm, the strip steel speed is adjusted, and closed-loop feedback is formed. Through multi-section independent temperature control, thickness-temperature dynamic modeling and a three-level cooperative control framework, accurate tracking of a gradient temperature curve is achieved, and the quality and efficiency of the annealing process are improved.

The invention relates to the technical field of electric control cabinets, and discloses an efficient heat dissipation frequency converter electric control cabinet which comprises a bottom plate and a heat insulation plate. In the efficient heat dissipation frequency converter electric control cabinet, a lower low-temperature area accelerates the flow speed of airflow in an air inlet pipe through rotation of a first fan, efficient heat dissipation is achieved, and a second fan in a high-temperature area and the first fan on the top supply air upwards; the natural convection characteristic of hot air rising is used for accelerating hot air discharging, air cooling is started at the low temperature, cooling plate water cooling is automatically switched at the high temperature, and the energy-saving performance and the powerful cooling requirement are both considered. When a differential pressure sensor on the filter screen monitors abnormity, a threaded rod can be driven to rotate, a brush plate moves up and down to automatically clean the filter screen, a second fan rotates reversely to blow dust and impurities away from the filter screen, a mounting frame is pushed inwards, a clamping block in a sleeve and a first circular truncated cone are unlocked, and a spring arranged on the sleeve in a sleeving mode can push the mounting frame and a mounting plate to automatically slide. When the mounting frame is pushed inwards again, the clamping block in the sleeve is automatically locked with the circular truncated cone I, so that the maintenance operation of the electric control cabinet is more convenient.

The invention belongs to the field of machine tool linear feed shaft thermal error prediction, and provides a cross-working-condition migration machine tool thermal error step-by-step prediction method and a cross-working-condition migration machine tool thermal error step-by-step prediction system. According to the technical scheme, the method comprises the following steps: acquiring thermal error data of the linear feed shaft of the machine tool under two working conditions of natural cooling and forced cooling and time-temperature distribution data of each temperature measurement point of the linear feed shaft; decoupling the thermal error data under each working condition into a linear component and a nonlinear deviation component; according to a heat conduction and convective heat transfer coupling mechanism, the inhibition effect of low-temperature water on the temperature rise of the lead screw is quantified, and a temperature rise inhibition coefficient is calculated; based on the inhibition coefficient, mapping the original temperature rise data and the nonlinear deviation component under the natural cooling working condition to an equivalent temperature rise characteristic space under the forced cooling working condition; and predicting a cross-working-condition linear component and a non-linear deviation component according to the equivalent temperature rise characteristic space, and performing superposition to obtain a thermal error prediction value of the linear feed shaft. And high-precision prediction of the thermal error of the linear feed shaft under different cooling working conditions is realized.

The invention discloses a photovoltaic-driven IDC electric-cooling linkage method and device, and belongs to the technical field of IDC electric-cooling linkage, and the method comprises the following steps: S1, constructing a gravity energy storage structure; s2, the gravity object is lifted to the highest point of the gravity object channel through the gravity energy storage structure; s3, air at the bottom of the gravity object channel is compressed for the second time, and a thermal cracking reaction is carried out; s4, thermal cracking gas generated by the thermal cracking reaction is drained, and combustion products are discharged into a gas storage chamber; s5, the generated steam waste heat pushes a turbine in a turbine chamber to do work for power generation; and S6, domestic hot water and night heating hot water are prepared, convective heat exchange is conducted, the low-temperature reclaimed water obtained after heat exchange is heated into high-temperature steam in a cooler, the high-temperature steam enters a turbine to become high-temperature reclaimed water, and the high-temperature reclaimed water flows into a control center or a water storage pool. The organic matter compressed garbage is used as a gravity object for gravity energy storage, and heavy oil, solid fuel, adsorbents and other high-value products are produced in the gravity energy storage process.

The invention discloses an in-tank convection prevention device and method. The in-tank convection prevention device comprises a storage tank body, a heat insulation module, a shielding corrugated plate, a bonding connecting strip and a convection blocking strip. According to the convection prevention method, the heat insulation module is firmly fixed by bonding the connecting strips, and a gas vertical flowing channel in a gap between the storage tank body and the heat insulation module is forcibly cut off by utilizing the transversely arranged convection blocking strips; according to the storage tank, a'thermosyphon 'closed circulation loop causing heat transfer is effectively damaged, continuous gas convection is avoided, and therefore structural damage or deformation of the storage tank body caused by local low-temperature impact is effectively prevented while the overall cold insulation performance is greatly improved and the cold loss is reduced.

The invention provides a heat and cold storage water body system based on a multi-head water distributor and a working method of the heat and cold storage water body system, and belongs to the technical field of water body heat storage. High-temperature water is stably injected into the upper layer of a water body through the suspended water distributor at the top, and low-temperature water is injected through the exposed water distributor at the middle lower part, so that mixing of cold water and hot water is reduced to the greatest extent, and stable temperature stratification is quickly formed and maintained. Therefore, the invalid mixing loss of cold and heat is obviously reduced, and the effective heat storage / cold storage capacity and the heat exchange efficiency of the water storage device are greatly improved. The floating type heat preservation top cover directly covers the water surface, upward evaporation heat dissipation and convection heat dissipation on the water surface are effectively blocked, heat loss of the water body is greatly reduced, the heat preservation performance of the system is excellent, and the energy storage efficiency is high.

The invention discloses an ultra-high voltage reactor shell convective heat transfer coefficient iterative calculation method and device, and the method comprises the steps: building a control equation of a temperature fluid field of an ultra-high voltage reactor, and building a function expression for obtaining a comprehensive convective heat transfer coefficient; the comprehensive convective heat transfer coefficient comprises a convective heat transfer coefficient under a natural convection condition and an equivalent radiation heat transfer coefficient, the comprehensive convective heat transfer coefficient is corrected step by step through multiple iterations based on a control equation of a temperature fluid field until the comprehensive convective heat transfer coefficient converges, the temperature difference between the wall surface and the external fluid is obtained, and the temperature difference between the wall surface and the external fluid is obtained. And taking the converged comprehensive convective heat transfer coefficient as a final convective heat transfer coefficient. According to the method, the equivalent radiation convective heat transfer coefficient is provided, the comprehensive convective heat transfer coefficient is obtained by combining the convective heat transfer coefficient under the natural convective heat transfer condition, and the accurate temperature difference between the wall surface and the external fluid is obtained through multiple times of iterative calculation.

The invention provides a multi-physical field coupled roasted eel cooking degree prediction and real-time temperature control system and method. The system comprises a tunnel type oven, an image acquisition module, an image synchronization and fusion module, a carbonization identification module, a temperature correction module, a cooking degree prediction module, a partition temperature control adjustment module, a conveyor belt speed control module and a system controller. The system fuses hot air convection and infrared radiation to form a coupled thermal field, obtains multi-mode information of a fish body by combining visible light and infrared imaging, realizes thermal-optical field collaborative perception through image fusion, carbonization identification and temperature correction, constructs a deep cooking degree prediction model based on multi-source features, drives thermal control and dynamic adjustment of a conveying strategy, and realizes deep cooking degree prediction. The accurate evaluation of the cooked degree of the roasted eel and the active intervention of the carbonization trend are realized, and the roasting uniformity and the product consistency are obviously improved.

The invention belongs to the technical field of building refrigeration, and discloses a dynamic partition refrigeration regulation and control system based on floor height, regulation and control areas are divided in real time according to the floor height, heat flux density and the like through a dynamic density clustering partition algorithm, and the influence of high-altitude air pressure on the sensible temperature is corrected in combination with a height compensation module; an adaptation strategy is generated based on a'height-load 'bivariate model; the high-layer area fits the air convection characteristic through a linear function, and the low-layer area reflects the soil thermal buffer effect through an exponential function, so that refrigeration parameters are accurately matched with actual requirements of all floors, and overheating or insufficient refrigeration caused by traditional unified parameter regulation and control is avoided; data are collected in real time through a space-air-ground three-in-one sensing network; when the personnel density in a region is suddenly increased or functions are switched, the system can complete temporary partition merging and regulation and control parameter adjustment in a short time, and the intelligent operation and maintenance requirements of scenes such as a campus and a hospital for real-time monitoring and rapid optimization are met.

The invention relates to an environmental test box for realizing high and low temperature rapid alternating circulation, which is mainly applied to the technical field of environmental test equipment. The test box is provided with a high-temperature chamber and a low-temperature chamber which are independent from each other, a thermal insulation layer is arranged between the two chambers, and the test box can respectively keep constant temperature environments at the highest temperature of + 75 DEG C and the lowest temperature of-50 DEG C; during a test, a sample is placed in the test bed, and the rotating shaft structure driven by the motor periodically rotates in a reciprocating manner or rotates in the same direction among different temperature zones, so that high-low temperature rapid alternating circulation is realized. The operation mode of the motor is controlled through the control system so as to simulate the accelerated aging process of the component in the temperature rapid alternating environment. According to the test box, through the design of the control system, the forced convection fan and the middle thermal insulation layer, it is guaranteed that the temperature switching process is rapid, uniform and stable. Compared with the prior art, high and low temperature circulation can be completed without overall heating and cooling of the interior of the test box, and the test box has the advantages of being high in test efficiency, capable of remarkably improving the reliability and accuracy of the high and low temperature alternating circulation test of the sample and the like.

The invention relates to a one-machine, three-device and four-working-medium full-effect power generation system technology for earth rock heat and other steam energy, in particular to a'gas-gas-steam-steam 'one-machine, three-device and four-cycle' micro-condensation cycle water feeder system, a double-water working medium heat exchanger system, a reverse Carnot cycle system and an earth rock heat output system which are matched with one another. A duplex reverse Carnot cycle system double-effect parallel medium two-direction progressive technological process, a single working medium through-flow structure and Rankine cycle uniform heat variable flow through-flow with'thermal unloading water and thermal loading water 'single working medium partition wall convection' micro-condensation heat regeneration and'main energy small flow steam and heated cycle huge running water 'double working medium partition wall convection heat exchange' are systematically created. The invention relates to a geothermal steam working medium independent heat exchange type output circulation, Rankine cycle power generation with two closed working media equal in heat and unequal in water through-flow, and a multi-system working principle that model selection is performed according to 6-20 times of through-flow and accumulation of small efficiency factors is equal to efficiency is combined, and a one-machine, three-device and four-cycle full-effect power generation system of general steam turbine distribution system full-efficiency power generation is included.

The invention discloses a radar sounding-based hail grading early warning method and system for a convective monomer hazard index and jump increase, and relates to the technical field of severe convective weather early warning. According to the method, monomer segmentation is carried out and a severe convection monomer hazard model is constructed based on regional multi-weather radar data and air sounding data, a discrimination threshold is determined based on local air sounding data, and segmented convection monomers are screened for three times to obtain classification types of the convection monomers; and on the basis, tracking a hazard index track of a convective monomer core area in real time, and when a monomer hazard index shows a remarkable jump characteristic in a set time window, dynamically judging the occurrence probability and grade of hail, and pushing a digital alarm. The classification, digitization and progressive algorithm of the invention fuses multi-source data collaborative analysis, dynamic threshold determination and real-time evolution tracking, and significantly improves the timeliness and accuracy of the turning point of the heavy rainfall hail severe convection weather process and hail classification early warning identification.

The invention discloses a solid waste water content prediction system and method based on an infrared thermal imager. The temperature field of the solid waste on the conveyor belt in the natural convection and forced convection moisture evaporation process is monitored and compared in real time through the thermal infrared imager, and the moisture content of the solid waste can be accurately predicted in combination with data processing, environmental parameter correction and prediction of a regression equation. Compared with a traditional sampling detection method, the method has the advantages of being high in real-time performance, non-contact, simple in equipment, good in economical efficiency and the like, can adapt to a complex industrial field environment, and provides a new technical means for intelligent and refined control over waste incineration. The system is simple in structure, high in reliability, good in detection precision and capable of achieving real-time prediction of the water content of the solid waste entering the furnace.

The air conditioner circulating fan comprises a machine head internally provided with a first air duct, and under driving of a first draught fan in the first air duct, external air enters the first air duct through a first air inlet and then flows out of a first air outlet; a refrigeration assembly, a water cooling assembly, a second air channel and the like are arranged in the machine base, under driving of a second draught fan in the second air channel, external air enters the second air channel after being cooled into cold air through a second air inlet and an evaporator of the refrigeration assembly, and then enters the first air channel through a second air outlet to be mixed with air in the first air channel to form cold air. And the air flows out from the first air outlet. According to the air conditioner, after being cooled by the refrigeration assembly arranged in the machine base, the external air entering the second air channel enters the first air channel and is mixed with the air in the first air channel to form cold air to be sent out, and cooling is achieved while air circulation convection is conducted; and the air volume of the cold air can be adjusted by changing the temperature and proportion of the cold air entering the first air duct, so that the adjustment of cooling is realized.

The invention discloses a steel heat treatment quenching and tempering device which realizes full-process automatic connection of special-shaped steel parts from furnace charging, heating, quenching to tempering through rail type butt joint of a heating furnace and a quenching bath, accurate lifting of a hydraulic driving material frame and intelligent switching of a driving unit. The procedures are seamlessly switched, so that the process period is remarkably shortened, manual intervention is reduced, and the operation risk is reduced while the production efficiency is improved; in the heating and quenching process, the charging tray drives the special-shaped part to continuously rotate, electric heating bars evenly distributed in the heating furnace are matched with forced convection stirring in the quenching pool, it is guaranteed that the temperature of all parts of the special-shaped part is evenly distributed, and the risk of thermal stress deformation is effectively reduced; the structure uniformity, the hardness consistency and the comprehensive mechanical property of the quenched and tempered special-shaped part are remarkably improved through a dynamic treatment mechanism; high-temperature waste gas drives the wind wheel to rotate through the gas guide assembly, temperature homogenization of the quenching liquid is achieved, a U-shaped pipe magnetic attraction and sedimentation dual impurity removal mechanism is achieved, and the service life of the liquid is prolonged.

The invention discloses a comprehensive test system and method for clothing radiation and convection heat dissipation mechanism research, and belongs to the technical field of clothing thermal performance tests.The comprehensive test system comprises a thermal dummy model, an environment control module, a data acquisition module and a signal processing module, and the thermal dummy model simulates human physiological characteristics according to requirements to adjust the body surface temperature; the partitioned thermal control units are used for independently controlling the temperature of a trunk and four limbs; the environment control module comprises a wind tunnel system and a temperature and humidity bin. The data acquisition module is composed of an infrared thermal imager array and a thermopile sensor group embedded into the surface of the dummy; the signal processing module is integrated with a multi-channel data synchronizer and an intelligent algorithm unit, the time synchronization precision of the multi-channel data synchronizer is smaller than or equal to 1ms, and the multi-channel data synchronizer is used for dynamically separating the radiation heat dissipation amount Qrad and the convection heat dissipation amount Qconv. According to the invention, multi-parameter synchronous measurement is adopted, information acquisition mechanisms such as infrared, thermopile and micro differential pressure sensors are integrated, and accurate separation of radiation and convection heat dissipation is realized.

The invention relates to the technical field of material mechanical property testing, and provides an ultralow-temperature slow strain mechanical tensile test platform which comprises a vacuum Dewar unit, a liquid helium temperature control unit, a slow strain tensile unit, a measuring unit and a control unit, the vacuum Dewar unit comprises a vacuum Dewar body and is used for providing a closed low-temperature test environment; the liquid helium temperature control unit comprises a direct injection module and a recovery module, the direct injection module is used for directly injecting liquid helium to the gauge length section of the sample for cooling, and the recovery module is used for recovering and recycling unevaporated liquid helium; the slow strain stretching unit is used for stretching a sample arranged in the vacuum Dewar body at a low strain rate; the measuring unit is arranged in the vacuum Dewar body and is used for monitoring the temperature, the force value and the strain data of the sample in real time. Liquid helium is used as a cold source, the liquid helium is directly aligned to the gauge length section of the sample through the direct injection module, and compared with a traditional liquid helium steam natural convection heat exchange mode, the heat exchange coefficient is increased, and automatic precise temperature control is achieved.

The invention belongs to the technical field of additive design, comprises structure improvement and simulation analysis, and relates to an additive pipe fitting topological structure design method based on a three-period minimal curved surface. And different TPMS crystal lattices are applied to design, so that the TPMS system can adapt to various working conditions with different loads. Different filling modes are selected according to the geometrical morphology of the to-be-filled area, so that the number of interrupted areas is smaller, and the design freedom degree is higher. Through a gradient wall thickness command, a rod diameter gradual change effect appears in a non-contact area of a TPMS lattice and a part, and the supporting capacity is effectively enhanced under the condition that the removal difficulty is not improved. Adjustment of different unit densities enables TPMS crystal lattices to independently perform enhanced control on stress concentration points without affecting other areas. The actual conditions of a wind field and a temperature field are described through conjugate heat transfer analysis modeling, so that heat conduction and forced convection exist in the whole physical field at the same time, and the result accuracy is improved. According to static analysis, TPMS crystal lattices with the better strengthening effect are selected from the angle of load resistance.

The invention discloses a closed space temperature rise evaluation method and device for a Stirling cylindrical linear motor. The method comprises the following steps: building a motor model; obtaining a fluid domain model of the closed space according to the motor model; performing CFD simulation according to the fluid domain model to obtain a convective heat dissipation coefficient; acquiring loss and heat generation rate of the heat source part; obtaining a first model according to the motor model, the fluid domain model and the loss and heat generation rate; performing steady-state thermal simulation according to the first model based on a first condition to obtain steady-state temperature distribution; the first condition comprises removal of convection heat dissipation of a cylindrical linear motor and a fluid domain contact surface; importing the convective heat dissipation coefficient into the first model to obtain a second model; and taking the steady-state temperature distribution as initial temperature distribution, performing transient thermal simulation according to the second model, and taking a simulation result as initial temperature distribution of transient thermal simulation of a next time step until calculation of a preset maximum time step is completed, so as to obtain the running temperature rise of the motor.

According to the solar cross-seasonal heat storage system, a heat storage water tank is provided with a cylindrical main tank body and an auxiliary tank body which is arranged at the bottom of the main tank body and is of an inverted cone structure, and the bottom of the heat storage water tank is provided with a conical wall face with a certain inclination angle so that fluid can be prevented from flowing; convective mixing between low-temperature water at the bottom of the heat storage water tank and high-temperature water in the upper middle of the heat storage water tank can be reduced, the internal convection effect strength is weakened, mixing of cold water and hot water is reduced, and the hot water yield can be increased. And moreover, the flow deflectors for reducing the water flow speed are arranged in the main tank body of the heat storage water tank, the water flow can be blocked by the flow deflectors, the flow speed is relatively reduced, the natural convection heat exchange intensity in the water tank is smaller, and the generated heat loss is smaller, so that the flow deflectors are beneficial to improving the heat storage efficiency of the heat storage water tank. The solar cross-seasonal heat storage system has the advantages of being high in heat storage efficiency and small in heat loss.

The invention relates to the technical field of artificial intelligence, in particular to a non-deterministic boundary thermal convection flow field intelligent analysis method based on deep learning, which comprises the following steps: acquiring sparsely distributed training data in a thermal convection system, constructing a physical information neural network and designing a composite loss function comprising a prediction error, a physical constraint error and a boundary condition error; and dynamically adjusting a weight coefficient by using a quasi-Newton optimization algorithm to carry out network training, and finally realizing prediction of full-field physical quantity distribution and inversion of missing boundary conditions. According to the method, a fluid mechanics control equation is used as a physical constraint to be embedded into a deep learning framework, the dependence of an existing calculation method on accurate boundary conditions is overcome, and the problems of flow field analysis and parameter inversion caused by unknown boundary conditions or difficulty in direct measurement are effectively solved; the method has important application value in engineering scenes such as aero-engine thermal management.

The invention discloses a turbulent heat convection experimental device based on bidirectional symmetrical temperature control, and relates to the technical field of convection experimental devices, the turbulent heat convection experimental device comprises an experimental box, a cavity is formed in the experimental box, two groups of mounting plates are further included, a plurality of groups of supporting rods are arranged between the two groups of mounting plates, and clamping grooves are formed in the corresponding positions of the two groups of mounting plates; copper sheets are arranged in the clamping grooves in the two sides, a Peltier patch is arranged on the surface of the copper sheet at the upper end, an electric heating sheet is arranged on the surface of the copper sheet at the lower end, multiple sets of heating wires are arranged in the cavity, temperature difference is generated between the upper installation plate and the lower installation plate through the Peltier patch and the electric heating sheet, Rayleigh-Benard convection is formed, and the temperature difference is controlled by controlling the heating area of the electric heating sheet and the heating wires. And meanwhile, the power input of the upper plate and the lower plate is automatically and finely adjusted in real time through the adjusting mechanism, so that the bidirectional temperature symmetry is remarkably enhanced.

The invention discloses a continuous efficient heat storage and exchange converter and method based on convection-radiation conversion, and belongs to the technical field of industrial energy conservation. The converter is of a three-dimensional spiral body structure, and the spiral body is formed by stacking 300-500 layers of shaftless equal-diameter spiral wires; the key structure sizes of the spiral wire comprise a wire diameter d, a spiral diameter D and a screw pitch B; wherein the thread diameter d of the spiral thread is 0.5-1 mm, and the spiral thread diameter D and the thread pitch B are respectively 1-2 mm; the specific surface area of the spiral body is 1800-3000m < 2 > / m < 3 >, so that the high convection heat exchange area is ensured; the thickness of the spiral body is 300-500mm, so that the radiation emissivity is close to 1; the porosity of the spiral body is gradually changed from 0.5 to 0.9 from the center to the heat exchange surface, so that radiation shielding in the three-dimensional spiral body is reduced. The device has the advantages that the device is suitable for efficient recycling of flue gas waste heat of various industrial furnaces, and the waste heat recycling efficiency can be effectively improved to 75% or above; particularly, a heat accumulating type heating furnace capable of reversing periodically can be replaced, the problems of furnace temperature and pressure fluctuation, flue gas waste heat loss and the like caused by frequent reversing in the traditional heat accumulating type heating process are solved, and continuous and efficient production of an industrial furnace is achieved.