504 results about "Heat capacity" patented technology

The invention discloses an indoor temperature real-time regulation and control method of a heat distribution pipeline and a control system of the indoor temperature real-time regulation and control method, relates to the technical field of dynamic control of a heat distribution pipe network, and solves the problems of hydraulic oscillation and temperature control hysteresis caused by the fact that local valve regulation neglects whole-network coupling and a first-order linear model is difficult to describe multi-order thermal inertia and large heat capacity in the prior art. According to the scheme, on the basis of pipe network distributed PDE / lumped parameter hybrid modeling and in combination with extended Kalman filtering and unscented Kalman filtering on-line identification, a feedforward decoupling compensation item is generated through spectral decomposition, a self-adaptive multi-model predictive control and iterative learning compensation closed-loop structure is constructed, a control instruction is issued according to a pump-first and valve-second serialization strategy, and a self-adaptive multi-model predictive control and iterative learning compensation closed-loop structure is constructed. Meanwhile, the model weight and the prediction time domain are dynamically adjusted; according to the method, the global balance capability and the temperature tracking precision of heat distribution pipeline regulation and control are remarkably improved.

The invention discloses a soft start control method for intelligent temperature control of a glue injection mold, and particularly relates to the technical field of glue injection molds. Initial temperatures of a plurality of heating areas of the mold are collected, and a temperature distribution model is constructed; calculating a thermal inertia score value based on the thermal response characteristic and the thermal capacity parameter of each region; predicting temperature rise rates of different areas by using the thermal inertia score value, the thermal coupling degree abnormal value and the historical control deviation frequency, and setting differentiated soft start amplitude limiting parameters; temperature feedback is collected in real time in the heating process, a temperature rise rate error sequence is constructed, and the future deviation risk is predicted through the dynamic Bayesian network; when the risk value exceeds the limit, the PWM duty ratio or the conduction angle of the heating area is dynamically corrected, and power output self-adaptive adjustment is achieved; the method has the advantages of being high in predictability, accurate in response and intelligent in control, and is suitable for high-precision heating control application of the complex glue injection mold.

The invention discloses a new energy commercial vehicle fast charging working condition thermal management control method and system, and relates to the technical field of new energy vehicle thermal management and fast charging control, and the method comprises the following steps: collecting the temperature, voltage and current data of each subarea of a battery in a fast charging process, forming a time synchronization sequence, and based on the sequence, obtaining a new energy commercial vehicle fast charging condition; calculating internal thermal resistance and thermal capacity parameters of the battery in real time by using an online identification algorithm, updating a basic thermal model to obtain a corrected thermal dynamic model reflecting actual thermal characteristics of the current battery, importing the corrected model into a model prediction controller, constructing a multi-objective optimization function, and performing rolling solution in a prediction time domain to obtain a prediction model; and outputting an optimal target charging current instruction and a cooling total demand, adjusting the charging power according to the target current, and combining the temperature difference distribution of each partition. Accurate prediction and partition cooperative control of the thermal state of the battery in the fast charging process are achieved, the temperature rise and the temperature difference are effectively restrained while the charging efficiency is guaranteed, the service life of the battery is prolonged, and the system safety is improved.

The invention relates to the technical field of cold-chain commodity transportation, in particular to a temperature monitoring and control method in a cold-chain commodity transportation process, which comprises the following steps: acquiring real-time temperature data, and generating a thermal response digital file of a cold-chain commodity according to the real-time temperature data and a cold-chain commodity category database; real-time positions and external air temperature data of the cold chain commodities are collected, and a temperature threshold value of the next time period is predicted according to the heat capacity characteristic parameters reflected by the thermal response digital archive; a three-dimensional temperature field distribution diagram is constructed based on the temperature threshold value of the next time period and the vibration data of the compartment where the cold-chain commodities are located; generating a control instruction according to the coordinates of the temperature anomaly region in the three-dimensional temperature field distribution diagram; after the control weight coefficient is calculated according to the control instruction and the preset energy consumption optimization objective function, the temperature control operation is executed according to the control weight coefficient and the control instruction, and balance temperature monitoring and control and energy consumption optimization are effectively achieved.

The invention relates to the technical field of industrial waste heat recovery optimization, in particular to an industrial circulating cooling water waste heat multi-source coupling system based on data driving, and the system comprises a waste heat collection unit, a data processing unit and an intelligent coupling regulation and control unit. After the data processing unit preprocesses data, high, medium and low temperature layers are divided according to temperature, a clustering algorithm is combined to subdivide a calorific value sub-layer, a dynamic characteristic file containing a parameter change curve, fluctuation amplitude and duration is established, the intelligent coupling regulation and control unit compares the file with pre-stored user heat demand characteristics, the matching degree is calculated preferentially according to the temperature contact ratio, and the matching degree is calculated preferentially. A single or multi-source cooperative coupling path is generated, target thermal parameters are synthesized through thermal capacity weighting in a multi-source mode, the supply and demand matching precision and the utilization efficiency of waste heat are improved, diversified energy consumption requirements of industrial scenes are met, and energy conservation and emission reduction are facilitated.

The invention discloses a dynamic load adaptive charging pile liquid cooling control method, relates to the technical field of thermal management, and solves the problems of temperature prediction deviation, local hot spot leak detection and protective supercooling caused by a simplified thermal model based on fixed parameters and key temperature points under rapid load fluctuation. Parameterization time-varying heat supply network parallel multi-rate observation is constructed, a heat exchange coefficient and node heat capacity are identified and calibrated through recursion with physical constraints, transmission time delay is merged into an extended state in an explicit mode, short-window high-frequency sampling and local temperature field reconstruction are triggered based on residual errors, and the time-varying heat supply network parallel multi-rate observation is achieved. A control sequence is issued in parallel by adopting hierarchical rolling type control with a second-order moment uncertainty constraint; based on the scheme, the short-term temperature field prediction precision and the local hot spot identification capability are improved, and the cooling resource directional utilization efficiency and the charging system operation continuity are remarkably improved.

The invention provides a fused salt heat storage coupled compressed air energy storage cooperative power generation system and a control method thereof.The fused salt heat storage coupled compressed air energy storage cooperative power generation system comprises a data acquisition module, a multi-target optimization decision algorithm based on dynamic programming, an energy distribution module, a dynamic adjustment module and a safety protection module; a multi-objective optimization decision algorithm based on dynamic programming automatically switches system working modes, an energy distribution module optimizes fused salt and air flow of a high-temperature fused salt air heat exchanger, and a dynamic adjusting module adjusts fused salt pump flow, compressor rotating speed and valve opening in real time. And the safety protection module is used for monitoring and preventing over-temperature, fused salt solidification and pipeline corrosion. The problems that in the prior art, a fused salt heat storage type photo-thermal power generation system is insufficient in heat storage capacity under the extreme weather condition, a compressed air energy storage system depends on fossil fuel, the afterburning efficiency is low, and the energy loss is caused due to the low system coupling degree can be effectively solved.

The invention discloses a temperature real-time estimation and fault monitoring method for a motorized spindle temperature unmeasurable area, and the method comprises the steps: constructing a heat capacity and heat resistance network model of a to-be-monitored machining center motorized spindle, and carrying out the finite element preliminary simulation, and obtaining the prediction data of a transient temperature field; and according to the transient temperature field prediction data and the local actually measured temperature data, parameter joint optimization is carried out on the heat capacity and heat resistance network model to obtain a motorized spindle transient temperature field real-time prediction model, and a real-time motorized spindle temperature distribution diagram is generated after grid refinement processing and is used for abnormal heating fault real-time judgment. According to the method, the transient temperature field of the motorized spindle under the current working condition can be completely and accurately predicted in real time, and the safety of the motorized spindle is better protected.

The invention relates to the technical field of thermal management control, and particularly discloses a thermal management controller regulation and control method and system based on dynamic thermal inertia prediction. According to the method, the dynamic thermal inertia model is constructed through system identification, and the future temperature field evolution and thermal accumulation risks of the system are accurately predicted. On the basis, a multi-layer nested compensation strategy composed of pre-compensation, main compensation and residual compensation is generated in three dimensions of a compensation angle, a compensation order and a compensation domain, and prospective accurate intervention is achieved. In order to evaluate the control effect, an artifact intensity entropy value is introduced as a quantitative index, and a model and a strategy are corrected in real time through an outer ring optimization mechanism to form self-correction. When continuous thermal unbalance caused by hardware design defects is detected, the system can further start hardware cooperative regulation and control, local heat capacity and a heat dissipation path are optimized fundamentally, cross-level cooperative optimization from a control algorithm to a physical structure is achieved, and finally high-precision, low-energy-consumption and self-adaptive system-level thermal management is achieved.

The invention discloses a hybrid model driving-based space-time consistency regulation and control method for a central heating system, which comprises the following steps of: performing hydraulic equilibrium analysis on the central heating system, and performing hydraulic analysis on a space structure of a heating pipe network by using a graph theory method based on an energy conservation law, simulating the hydraulic working condition of the official website by using a basic loop analysis method; based on an energy conservation and mass conservation heat balance equation, a heat source and a heat user are indirectly connected through heat exchanger transition, a dynamic physical model of each subsystem is established based on a lumped heat capacity method, a refined model of the heat supply system is established, and the thermal dynamic characteristics of the system are researched and analyzed; based on a Pearson's correlation function, considering thermal inertia of equipment such as a pipe network of the central heating system and a building fence structure, and determining a regulation and control period and time of the regulation and control model; according to the method, by controlling the opening degree of the regulating valve of the heat exchange station, the suitability degree of the room temperature of a heat user is guaranteed.

The invention discloses a thermal tracing test device and method for determining the comprehensive hydrogeological condition of an aquifer, and the device comprises a water storage system, a medium groove, a heating system, and a distributed optical fiber data collection system. The device is simple in structure and intelligent and convenient to operate, instantaneous / continuous linear heat source excitation can be achieved through the heating system, and the water pressure and temperature change conditions of all positions are monitored in real time through the distributed optical fiber data acquisition system; the comprehensive hydrogeological parameters such as the flow velocity, the flow direction, the permeability coefficient, the thermal diffusion coefficient, the thermal capacity and the heat conductivity coefficient of underground water are studied, the heating system and the distributed optical fiber data acquisition system can be used for indoor tests and field tests, operation is easy and convenient, data precision is high, and practicability is high.

The invention relates to the technical field of ice and snow environment simulation, and discloses an ice and snow environment simulation test method based on multi-field coupling. The method comprises the following steps: collecting a dynamic multi-field data set in a target ice and snow environment, wherein the dynamic multi-field data set covers a periodic temperature change sequence, a relative humidity fluctuation sequence and surface ice layer thickness real-time monitoring data; carrying out multi-physics field coupling numerical simulation processing to generate coupling field distribution characteristics including an axial heat conduction coefficient gradient, a radial fluid velocity cumulant and a tangential ice layer stress fluctuation coefficient; calling a pre-configured ice and snow growth simulation model to execute ice layer evolution analysis to obtain an ice layer growth rate prediction value and a high-risk icing area position identifier; performing environment dynamic compensation correction on the ice layer growth rate prediction value by using the correlation characteristic of the relative humidity fluctuation sequence and the material heat capacity attribute; based on the high-risk icing area position identification, scientific guidance is provided for related protection in the ice and snow environment.

The invention relates to the technical field of welding, in particular to a hot riveting welding head synchronous temperature control method and system based on the temperature change rate, and the method comprises the steps: executing full-power heating pulse triggering operation on a welding head, calculating the pulse duration according to a start timestamp and an end timestamp, calculating the temperature rise, and eliminating peak noise through a digital filtering algorithm; environment temperature and relative humidity are collected in real time, and equivalent heat capacity is calculated; the initial temperature difference between any welding heads is calculated, and a dynamic target temperature curve is constructed; and calculating an actual temperature change rate, synchronously extracting a target change rate of the dynamic target curve at a corresponding moment, calculating a change rate deviation between the two change rates, judging whether intervention adjustment is needed or not, calculating an output signal by using an incremental PID algorithm if intervention adjustment is needed, and adjusting the heating power according to the output signal. According to the scheme, the stability of the hot riveting welding quality is effectively improved by accurately quantifying the thermal characteristics of the heterogeneous welding head, dynamically planning a personalized temperature rising track and performing high-frequency closed-loop regulation and control.

The invention relates to the field of computer heat dissipation control, and discloses a high-performance computer system temperature regulation and control method which comprises the following steps: dividing a computer system into a plurality of hot areas and initializing thermodynamic parameters; collecting temperature, power consumption and process data in real time, identifying a burst process and constructing a dynamic heat capacity model; the heat capacity parameter and the heat dissipation coefficient are updated online through a recursive least square method; the multi-target weight is dynamically adjusted based on the temperature deviation degree and the heat capacity change rate, a distributed optimization model containing heat diffusion coupling constraints is established, and an optimal heat dissipation strategy is solved by adopting an improved ADMM algorithm; model prediction deviation is corrected through a double-loop control mechanism, and data updating circulation is triggered in combination with burst process marks and temperature out-of-limit events. According to the method, through a dynamic modeling, weight self-adaption and closed-loop control fusion mechanism, the temperature control precision and the system safety in a complex thermal coupling scene are remarkably improved, and meanwhile heat dissipation efficiency, noise suppression and energy efficiency balance optimization are achieved.

The invention relates to the technical field of electrical performance testing, in particular to a method and system for measuring loss of an inductance winding, and the method comprises the following steps: applying a direct current to a measured inductance winding, synchronously monitoring the temperature, and multiplying a pre-measured direct current resistance value by a direct current value to obtain a direct current loss power value. The direct current is applied to the inductance winding, the temperature is monitored synchronously, the direct-current loss power is obtained by combining the direct-current resistance value and the current value, the temperature curve in the initial stage is extracted, the temperature rise rate is calculated, and therefore the winding heat capacity parameter is obtained, loss measurement can be closely associated with thermal response, and the measurement accuracy is improved. Introduction of a heat capacity factor is added in loss calculation, dynamic characteristics of a winding material on a thermodynamic level can be reflected, instantaneous current with load step change is applied after an inductor is cooled, an instantaneous loss power curve is generated by collecting a voltage sequence and a current sequence at the same time, and loss calculation is not limited to average value or steady state measurement any more.

The invention relates to the technical field of battery thermal performance measurement, in particular to a method for measuring the specific heat capacity of an energy storage battery. The theoretical model is calibrated by monitoring the cooling curve of the battery so as to ensure that the heat transfer characteristic of the battery is accurately reflected. Then, constant-power heating is adopted, so that the thermal field of the battery reaches a quasi-steady state, and in the steady state, the temperature change is gradually consistent; and recording a temperature change curve in real time through a temperature acquisition instrument, and calculating the specific heat capacity of the battery in combination with the calibrated model and a constant power input condition. According to the method, only the voltage-stabilized power supply and the temperature acquisition instrument are needed, so that the cost is greatly reduced; the measurement precision is improved through temperature change curve analysis after model calibration, and the problems that in a traditional method, environmental interference is large, and precision is insufficient are solved; the time for reaching the quasi-steady state is shortened through constant-power heating, and the measurement process is accelerated. The method is suitable for various energy storage batteries, can meet the requirements of industries such as electric automobiles and electric energy storage on the thermal performance of the batteries, and has wide popularization value.

The invention relates to a hybrid energy storage optimization method and device considering a fused salt heat storage coupling thermal power generating unit, and the method comprises the steps: analyzing the basic structure and energy flow relation of the fused salt heat storage coupling thermal power generating unit, and carrying out the transformation system division of the fused salt heat storage coupling thermal power generating unit; analyzing energy flow of each device of the fused salt heat storage coupling thermal power generating unit transformation system, and constructing an energy balance model and constraint conditions; building a corresponding mathematical model based on the energy balance model of each device; establishing a double-layer optimization configuration model of the corresponding hybrid energy storage system; solving the mathematical model and the double-layer optimization configuration model; according to the method, a mathematical model corresponding to molten salt heat storage coupled thermal power generating unit transformation system operation analysis is established based on the internal energy flow relation of molten salt heat storage and thermal power generating unit deep coupling, the electrochemical energy storage capacity and the molten salt heat storage capacity can be reasonably optimized through a model calculation result, multi-energy complementation of different types of energy is achieved, and the energy efficiency is improved. The system flexible adjustment capability is improved, and the system operation cost is reduced.

The invention relates to an efficient fused salt heat storage capacity regulation and control method. According to the method, molten salt heat storage system state parameters are monitored in real time, a high-precision temperature sensor is used for obtaining temperature data of a high-temperature molten salt tank and a low-temperature molten salt tank, and a non-intrusive flow sensor is used for collecting the real-time flow value of a molten salt pump. And constructing a user load demand prediction model based on deep learning, and calculating the target heat storage capacity in combination with a power grid dispatching instruction and a real-time electricity price signal. The rotating speed of the molten salt pump is adjusted through a self-adaptive PID controller, and the opening degree of a heat exchanger valve is adjusted through an intelligent valve adjusting system. And when the temperature of the fused salt is lower than a set threshold value, the silicon carbide ceramic heating electric heating device is started, and the finned tube heat exchanger is used for recovering waste heat. And based on the real-time heat storage capacity deviation value, PID control parameters are corrected by applying an improved fuzzy logic algorithm, so that the heat storage capacity of the fused salt is accurately regulated and controlled, and the efficiency and the stability of the system are improved.

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 relates to the technical field of boiler control, in particular to a multivariable coupling thermal process regulation and control system and method for carbon pollution governing, and the method comprises the steps: collecting multi-source data such as acoustic emission, temperature, humidity and spectrum, and constructing a feature sequence through time mark alignment and wavelet packet enhancement; a heat value characterization quantity is predicted by using a Shenchang differential equation model fused with dynamic gating, a partition equivalent thermal network model is driven on this basis, and accurate prediction of a future time domain temperature field is realized by dynamically correcting thermal resistance and thermal capacity; based on the prediction result, a control instruction is solved through multi-objective optimization under the condition that the active temperature constraint is met; and in combination with heat flow density feedback, a layered reinforcement learning controller is adopted for online compensation of a pre-feedback instruction, and stable and efficient regulation and control of the boiler are achieved.

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 real-time temperature prediction method for a permanent magnet synchronous motor. The method comprises the following steps: acquiring real-time working condition data and temperature data of the permanent magnet synchronous motor; pre-dividing and defining motor hot nodes based on each physical component; constructing a lumped heat estimation optimization model composed of a heat conductivity estimation sub-network, a power loss estimation sub-network, a reverse heat capacity estimation sub-network and a lumped parameter heat network recursor; inputting the real-time working condition data and the temperature data into a lumped heat estimation optimization model to respectively obtain a heat guiding quantity, a power loss vector and a reverse heat capacity matrix; and inputting the parameters and the real-time temperature data into a lumped parameter thermal network recursion device, and outputting a temperature real-time predicted value. According to the temperature real-time prediction method of the permanent magnet synchronous motor, the precision and reliability of temperature prediction are further improved through combination of the lumped parameter thermal network and the neural sub-network.

The invention relates to the technical field of energy management, in particular to a dynamic energy management method and system for a central air-conditioning system based on a large model, and the method specifically comprises the steps: outputting a short-term load demand prediction curve in a rolling manner through a time sequence depth prediction model; carrying out inversion calculation on equivalent heat capacity and equivalent heat resistance of the building material through a physical information neural network, and quantifying thermal inertia parameters of the building material in real time; evaluating a phase change delay time coefficient of the building material; obtaining a photovoltaic power generation power prediction curve of a power grid system and a power grid time-of-use electricity price signal, and determining an optimal energy charging and discharging time window of the building material; and adopting a multi-objective decision algorithm to decide and generate an optimal operation strategy of the central air-conditioning system. The problem that in the prior art, an energy management system matched with the thermal dynamic characteristics of a building is lacked is solved.

The invention relates to an intelligent heat dissipation method and system based on a natural cold source, and the method comprises the steps: obtaining heat load data of a data center and water temperature data of different depths of the reservoir in real time through sensors disposed in the reservoir and the data center, and generating heat capacity attenuation curves of water bodies of different depths; based on the real-time heat load data of the data center and the heat capacity attenuation curves of the water bodies of different depths, outputting optimal calling parameters by utilizing a self-adaptive cold source hierarchical selection algorithm; instructions are sent to a water taking pump and a heat exchanger according to the optimal calling parameters; the water taking pump receives the instruction and adjusts the water taking temperature and the pumping speed of the deep water, and the heat exchanger receives the instruction and adjusts the working state; and feedback information of the sensor is continuously received and analyzed, optimal calling parameters are dynamically adjusted, and instructions are sent to the water taking pump and the heat exchanger. The method has the advantages that the optimal natural cold source calling parameters are determined, and the energy utilization rate and the cooling effect of the data center cooling system are improved.

The invention relates to the field of brake early warning, in particular to a brake early warning method, device and equipment and a medium. According to the brake disc temperature, the brake disc thickness and the set temperature, the first residual heat capacity is determined, and the set temperature is the temperature for guaranteeing the braking efficiency; acquiring data corresponding to the unmanned aerial vehicle task, and calculating braking energy according to the data corresponding to the unmanned aerial vehicle task; brake early warning information is determined according to the first residual heat capacity and the brake energy, and the brake early warning information is used for conducting brake warning. The first residual heat capacity is determined according to the brake disc temperature, the brake disc thickness and the set temperature; according to the data corresponding to the unmanned aerial vehicle task, brake energy is calculated; brake early warning information is determined according to the first residual heat capacity and the brake energy; the multi-dimensional real-time evaluation of the brake disc state, the task parameters and the brake efficiency is integrated; the thermal risk is pre-judged through the task parameters, and accurate brake early warning information is determined.

The invention provides a liquid-liquid compressed carbon dioxide energy storage system for recovering waste heat of a data center. The liquid-liquid compressed carbon dioxide energy storage system comprises a carbon dioxide liquid storage tank, an energy storage assembly, an energy release assembly and a data center cooling circulation loop. In the electric power valley period, low-pressure liquid carbon dioxide cold energy is recycled through the phase change cold accumulator, surplus electric power is consumed through the two-stage compressor, and high-pressure gas heat # imgabs0 # is recycled through the two-stage intercooler to provide energy for the energy release process; in the power peak period, the phase change heat accumulator is matched with heat capacity, waste heat of a data center is recycled, high-pressure liquid carbon dioxide is preheated, heat exchange of a reheater is optimized, # imgabs 1 # efficiency is improved, and meanwhile part of turbine exhaust waste heat is recycled for gas preheating in the energy storage process. Waste heat can be recovered while the cooling requirement of the data center is met, the energy loss of the data center is reduced, and meanwhile the energy storage efficiency of the system is improved.

The invention discloses a building energy consumption regulation control method and system based on energy-saving monitoring, and relates to the technical field of buildings, the energy-saving monitoring method of the invention significantly improves the precision of building energy efficiency regulation by accurately capturing temperature evolution sequences of different structural units and establishing a building response vector group. The indoor temperature can be dynamically predicted and adjusted by utilizing the heat capacity, the lag error and the cooling capacity release curve of each structural unit and combining accurate recognition of the cooling capacity release time window. Compared with a traditional heat supply control method based on fixed temperature control setting, the method has the advantages that thermal inertia and energy release of the building structure unit can be sensed in real time, excessive heat supply and energy waste are reduced, accurate control based on the structure unit characteristics and the time window feedback mechanism is beneficial to reduction of energy consumption of the building, and the energy consumption of the building is reduced. And meanwhile, the indoor temperature control comfort and the energy-saving effect are improved.

The invention belongs to the technical field of airborne environmental control / heat management, and particularly relates to a negative-pressure-controlled phase-change heat exchange system which comprises a phase-change evaporation device for storing a phase-change working medium, and the phase-change working medium cools a working medium in a heat exchange unit through phase-change heat absorption; the heat exchange unit and the heat dissipation equipment form a circulation loop, and the circulation loop transfers heat through a working medium; the anti-freezing heating unit is used for heating the phase change working medium in the phase change evaporation device and preventing the working medium from being frozen under the condition of too low temperature; the vacuum generator is used for applying negative pressure into the phase change evaporation device and reducing the saturation temperature of the phase change working medium; the control unit detects the temperature, the pressure and the liquid level in the phase change evaporation device through a sensor, adjusts the vacuum degree in the phase change evaporation device according to control requirements, and starts the anti-freezing heating unit before the freezing temperature is reached, and the system has the advantages of being large in adaptive heat capacity, capable of achieving heat dissipation heat sink self-realization, low in airborne energy consumption, high in expansibility and the like.

The invention discloses a variable capillary heat pipe structure and an additive manufacturing method, and relates to the field of lightweight multifunctional structures.The variable capillary heat pipe structure comprises a heat pipe outer wall, a heat pipe inner wall and a heat pipe inner wall, the internal capillary core is connected to the inner wall of the heat pipe outer wall, and a cavity is formed in the center of the section of the internal capillary core and forms a middle cavity in the length direction; the internal capillary core comprises n sections of capillary core structures in the length direction of the internal capillary core, n is equal to the number of loads with different heat flow densities connected with the heat pipe, and the thicknesses, pore sizes and / or porosities of the different sections of capillary core structures are different. The heat capacity and the heat transfer speed of the working medium at different positions are changed, and adaptive regulation and control of the heat transfer capacity of the heat pipe at different positions are achieved.

The invention discloses a chef machine intelligent control method and system based on the Internet of Things, and relates to the technical field of chef machines, and the method comprises the steps: building a two-dimensional thermophysical property distribution diagram of a pot bottom based on a cook machine pot structure and manufacturing data, loading a heat conduction finite element simulation model, simulating the thermal diffusion behavior of a pot body in an embedded edge calculation module, and calculating the thermal diffusion behavior of the pot body; and spatial registration and difference operation are performed by combining a temperature distribution diagram acquired by the thermal infrared imager in real time, so that online self-calibration of thermal field simulation is realized. Then dividing the pan bottom into asymmetric thermosensitive cells through a region growing algorithm and a weighted Voronoi strategy, and extracting multi-dimensional thermal sensing data including a temperature value, thermal capacity density, image disturbance characteristics and the like by taking the highest temperature point in each cell as a thermal sensing acquisition point; the mechanism not only improves the modeling precision of the pot bottom heterogeneity thermal response, but also effectively improves the hot spot identification and interference elimination capability.