646 results about "Thermal circuit" patented technology

The invention discloses a pressure storage and heat storage coupled regenerative heat pump power storage system and a regulation and control method thereof. The system is composed of an electric-power generation integrated unit, an energy storage compression and energy release expansion integrated unit, an energy storage expansion and energy release compression integrated unit, a high-temperature heat exchanger, a backheating heat exchanger, a cold energy absorption heat exchanger, a heat storage and cold storage storage tank, a high-pressure gas storage tank and the like. And an energy storage / energy release loop, a heat storage / heat release loop, a cold storage / cold release loop and a pressure heat coupling loop are formed by connecting pipelines. In the energy storage mode, the compressor unit is driven by electric energy to conduct multi-stage compression, and compression heat and expansion cold are stored in the high-temperature storage tank and the low-temperature storage tank correspondingly. In the energy release mode, the heat storage medium and the cold storage medium are sequentially released to supply heat or cold to the circulating working medium, and the expansion unit is driven to drive the generator to generate electricity. According to the method, bidirectional operation of energy storage and energy release is achieved through valve switching and circulation control, and power output and load change are adjusted within a second level through a pressure-heat coupling mechanism.

The invention discloses a dynamic simulation modeling method for a compressed air energy storage system based on AMESIM and application, and belongs to the technical field of compressed air energy storage.The method comprises the steps that firstly, system indexes are determined, based on the system indexes, a system technological process diagram is designed, main equipment and auxiliary equipment are selected, and design point parameters of the main equipment and the auxiliary equipment in the energy storage and release stage are determined; then, according to the equipment model selection result, sub-models of all elements in the air circulation loop and the heat storage and exchange loop are selected in the AMESIM; thirdly, calibrating and verifying each main equipment sub-model by utilizing main equipment characteristics and model selection parameters, and building a steady-state simulation model of the compressed air energy storage system; and then, constructing a dynamic simulation model based on the steady-state model, and carrying out dynamic simulation verification and evaluation. According to the method, the co-simulation model integrating thermodynamics, fluid mechanics, control theory and mechanical dynamics can be quickly built, and the method has the advantages of being high in model modeling precision, high in multidisciplinary coupling calculation capacity, high in simulation efficiency and the like.

The invention relates to the technical field of cable joint temperature monitoring, and discloses a cable joint temperature monitoring method and system. A target model is constructed based on equipment data of a cable intermediate joint, regions are divided according to geometric shapes and materials to form a topological structure, and an initial thermal circuit model is constructed in combination with temperature field distribution and a thermal resistance branch; and optimizing the model by using the real-time temperature data, and finally judging the running state of the joint through the thermal circuit model. Complex grid discretization is replaced by an equivalent thermal resistance branch through a thermal circuit model, and the calculation speed is remarkably increased; through topological structure division, the limitation of an analytical method on a regular shape is broken through, and a special-shaped structure can be accurately processed; and the thermal circuit model maps an actual boundary through a thermal resistance parameter, so that an error caused by boundary simplification in an analytical method is avoided. The technical problems that a numerical method and an analytical method adopted by a traditional cable connector need to consider grid division and numerical stability, so that the calculation speed is low, and complex geometrical shapes and boundary conditions cannot be accurately analyzed are solved.

The invention provides an energy gradient utilization steam Rankine cycle power generation system and method for nuclear fusion, and belongs to the field of nuclear fusion energy conversion and utilization. Different temperature heat of a cladding, a divertor and a vacuum chamber is guided into a high-temperature independent heat storage loop, a medium-temperature independent heat storage loop and a low-temperature independent heat storage loop respectively, an operation section stores heat, and a pause section releases heat; feed water is heated step by step through a multi-stage preheater, an evaporator and a superheater according to the sequence of low temperature, medium temperature and high temperature, and superheated steam of 550 DEG C is formed to continuously drive a turbine to generate power. Decoupling of intermittent output of the fusion reactor and continuous operation of the power generation system is achieved, steam extraction of a steam turbine is omitted, the structure is simplified, and the energy utilization rate and the circulation efficiency are improved.

The invention relates to a fused salt heat storage system based on heat energy grading matching. The system comprises a first-stage heat exchange unit, a second-stage heat exchange unit, a third-stage heat exchange unit and a mixing unit, and the first-stage heat exchange unit comprises a first-stage fused salt heat storage loop and a first-stage heat exchange adjusting valve and is used for absorbing and storing high-grade heat of exhaust gas of an exhaust pipeline of a boiler furnace; the second-stage heat exchange unit comprises a second-stage fused salt heat storage loop and a second-stage heat exchange regulating valve and is used for absorbing and storing high-grade heat of main steam extraction of a main steam extraction pipeline of a high-pressure cylinder of the steam turbine; the third-stage heat exchange unit comprises a third-stage fused salt heat storage loop and a third-stage heat exchange regulating valve and is used for absorbing and storing low-grade heat of air exhaust of an intermediate-pressure cylinder of an air exhaust pipeline of the intermediate-pressure cylinder of the steam turbine; the mixing unit mixes the three kinds of exhaust heat and outputs working medium fluid meeting the target temperature so as to adapt to different preset operation working conditions of the thermal power generating unit. Therefore, heat energy can be stored and released in a gradient mode through the system, wide-temperature-range efficient utilization is achieved, and the flexibility and energy efficiency of the thermal power generating unit are improved.

The invention discloses a high-efficiency explosion-proof three-phase asynchronous motor, which comprises a motor, the motor comprises a shell, a stator, a rotor and a rotating shaft, the outer wall of the driving end of the rotating shaft is fixedly connected with a compression fan, the shell is provided with backflow channels, and the backflow channels are annularly distributed on the shell in an array manner. The two ends of the shell communicate with the left end and the right end of the shell correspondingly, so that airflow forms a closed heat exchange loop in the shell; a heat conduction connecting frame is arranged between the inner wall of the shell and the stator, extends to the left end of the stator and is provided with a shunting cover; the invention belongs to the technical field of motors, aims to solve the problem that in the prior art, the temperature of internal parts of a motor shell cannot be effectively conducted to the shell, and local heat accumulation is likely to be generated, and achieves the technical effects that airflow is divided into two strands through a flow dividing cover, and the inner strand of airflow directly cools the left end of a rotor and the left end of a stator through an exhaust port; the outer airflow strengthens cooling of the outer wall of the stator, and accurately distributes the airflow to the end part of the rotor / stator with the most serious heat accumulation.

The invention provides an efficient design optimization method and platform for gas insulated power transmission equipment, and the method comprises the steps: obtaining a variable set composed of a plurality of variable values according to a structure variable interval of the gas insulated power transmission equipment, carrying out the scanning calculation of the variable set, and obtaining the corresponding vortex field distribution and ohmic loss; determining a target loss value corresponding to each variable combination through a loss regression function; taking the target loss value as heat source excitation input of a thermal circuit model to obtain a temperature target function; obtaining a total cost objective function of the unit length according to the cost of the metal material and the internal insulating gas of the unit length equipment; solving the objective function and the nonlinear constraint function through a multi-objective particle swarm optimization algorithm to obtain a Pareto optimal solution set; determining a final target design scheme from the Pareto optimal solution set by adopting an approximate ideal solution sorting method; according to the technical scheme, the working efficiency of design optimization of the gas insulated power transmission equipment is improved, and the research and development period of the equipment is shortened.

The embodiment of the invention discloses a transformer winding overheating fault diagnosis method, and relates to the technical field of power equipment state monitoring, and the method comprises the steps: building a temperature field model of a target transformer under a normal working condition and a plurality of preset winding overheating fault working conditions through a finite element simulation method, and obtaining a temperature field model of the target transformer based on a simulation result; calculating to obtain a group of fault temperature rise critical values corresponding to the positions of the winding sections; when the transformer runs on line, actual measurement temperature rise data of a plurality of positions on the surface of a box body of the transformer are obtained, and the actual measurement temperature rise data are compared with a fault temperature rise critical value so as to locate a winding section where an overheating fault occurs; for the fault section, solving an actual overheating temperature rise value of the fault section through an inversion calculation method by utilizing a preset transformer equivalent thermal circuit model and combining the actually measured top layer oil temperature and bottom layer oil temperature data; high-precision simulation is arranged offline, an efficient algorithm is used online, the diagnosis precision and efficiency are both considered, the accuracy is high, and the practicability is high.

The invention belongs to the technical field of heat exchangers, and particularly relates to a testing system of a phase change energy storage heat exchanger. The test system comprises a water storage unit, a heating unit, a cooling unit and a phase change energy storage heat exchanger unit. The test system can quickly test multiple alternate cooling and heating circulation working conditions such as same-direction, reverse and horizontal flow of the cooling and heating loop. In addition, the outlet temperature of the fluid working medium of the phase change energy storage heat exchanger can be accurately obtained in real time, and the heat storage capacity of the phase change energy storage heat exchanger can be accurately verified. Besides, basic data are provided for engineering design of the phase-change energy storage heat exchanger, the design condition of the phase-change energy storage heat exchanger can be evaluated, the optimization direction of application of the phase-change energy storage heat exchanger in the aerospace field is fully known and mastered, design errors of the phase-change energy storage heat exchanger are reduced, and the design efficiency is improved. And the technical development of application of the phase change energy storage heat exchanger to the high-power space load is promoted.

The invention belongs to the technical field of power distribution automation of a power system, and particularly relates to a self-adaptive load control method and system for an intelligent cable branch box, and the method comprises the steps: collecting and preprocessing the current data of a branch loop and the temperature data of a cable joint in real time, obtaining a data confidence factor, and extracting a current change rate and a temperature rise rate; obtaining a load prediction value in a future set time period through a load trend prediction model; calculating the residual heat tolerance time for reaching the limit tolerance temperature; calculating an output load control adjustment coefficient based on the adaptive load control decision model and a particle swarm optimization algorithm; and judging a current state interval according to the load control adjustment coefficient, and controlling an execution end to execute a grading response strategy of through-flow maintenance, short-time overload monitoring and early warning and breaking current limiting in combination with the residual heat tolerance time. According to the method, the residual heat tolerance time is calculated in combination with load prediction and a transient thermal circuit model, and hierarchical response of load control is realized through a particle swarm optimized radial basis function neural network decision.

The invention relates to the technical field of energy control, and provides an ultra-low environment temperature carbon dioxide-based dual energy supply control system, which comprises a main circulation unit, an auxiliary circulation unit, a heat exchange water path module and a controller, a CO2 heating loop is adopted in the main cycle, and an R134a condensation supercooling loop is adopted in the auxiliary cycle; a controller constructs a directed graph structure based on thermodynamic topology, a three-branch convolution mechanism is adopted to model an energy transfer path, embedded representation is optimized and controlled in combination with an interval-contrast loss function, and an accurate control instruction is generated to adjust components such as a compressor and a throttling valve; in the aspect of fault diagnosis, a time parameterization convolution-symmetric GRU model is constructed, a Legendre polynomial is utilized to model a time convolution kernel, a Verlet integral mechanism is combined to reconstruct a hidden state path, and accurate identification of an abnormal trend in multi-source data is realized. According to the system, the energy supply stability and the intelligent level in the extremely low-temperature environment are improved.

The invention relates to the technical field of physical energy storage, and discloses a compressed carbon dioxide energy storage multi-combined supply system capable of continuously supplying cold and an operation method of the compressed carbon dioxide energy storage multi-combined supply system. In the carbon dioxide loop, the energy storage route comprises a low-pressure air bag, a first heat regenerator, a compressor, a cooler, a condenser and a high-pressure storage tank which are connected in sequence; the energy release route comprises a high-pressure storage tank, a second heat regenerator, a heater, a turbine, a radiator and a low-pressure air bag which are connected in sequence; the heat storage loop absorbs heat to the cooler through a heat storage medium and releases heat to the heater through the heat storage medium; and the refrigerating circuit releases heat to the first heat regenerator and the second heat regenerator through a refrigerating working medium. In the off-peak electricity period, waste heat of the refrigerating loop is used for increasing the temperature of carbon dioxide at an inlet of the compressor, and the heat storage temperature can be increased; in the peak electricity period, waste heat of the refrigerating loop is used for meeting heat needed in the carbon dioxide gasification process, and consumption of the heat storage loop is reduced.

The invention relates to the technical field of power equipment monitoring and fault diagnosis, and discloses a power transformer fault early warning method and system. The method comprises the following steps: acquiring a load current sequence, an environment temperature sequence and a top oil temperature sequence of a transformer; calculating an initial actually measured temperature rise based on the top oil temperature and the environment temperature, and determining thermal response lag time through cross-correlation analysis; carrying out translation correction on the load current according to the lag time, and constructing a time-aligned excitation input set and an actually measured temperature rise sequence based on a common effective time window; substituting the excitation input set into a thermal circuit model based on a thermal balance differential equation to calculate a theoretical reference temperature rise, calculating a residual error in combination with an actually measured temperature rise sequence, performing moving average filtering, and constructing a fault feature vector; and inputting the fault feature vector into a fault diagnosis classification model to determine a fault type and severity, and generating a grading early warning instruction according to the fault type and severity. According to the method, thermal hysteresis interference can be eliminated, and accurate quantitative early warning of the latent thermal fault of the transformer under the dynamic working condition is realized.

The invention provides a transformer heavy overload evaluation analysis method and device, and the method comprises the steps: building a thermal circuit model of load-induced heat point temperature rise of a transformer according to the heating power, equivalent heat capacity and equivalent heat resistance of an internal winding of the transformer, and load-induced heat top oil temperature rise of the transformer; converting a heat flow source in the heat circuit model into a hot pressure source based on the Thevenin theorem, constructing an equivalent heat circuit model of the heat circuit model, and calculating load heating hot spot temperature rise of the transformer under different load rates according to the equivalent heat circuit model; according to the historical environment heating temperatures of the transformer under different load rates, obtaining predicted environment heating temperatures of the transformer under different load rates; and obtaining winding hot-spot temperatures of the transformer under different load rates according to the load heating hot-spot temperature rise and the predicted environment heating temperature of the transformer under the same load rate. According to the invention, the thermal state sensing precision of the transformer under the dynamic load is improved.

A thermal management system and method, a computer device, a vehicle and a storage medium. A four-way valve (17) can regulate the connection relationship between an electric drive circuit and a battery circuit, and a three-way valve can regulate the connection relationship between a heating apparatus, a heating circuit and the battery circuit. Therefore, said system can meet the requirement of the heating circuit selectively heating a passenger compartment and a battery (31) and the requirement of the electric drive circuit using electric drive waste heat to selectively heat the battery and the passenger compartment; and for some scenarios of vehicle use at year-round high temperatures, no heat pump system is required, thus making designed valve parts and system piping simpler, reducing the cost and resource waste of the thermal management system, and lowering the complexity of piping control.

The invention discloses a laminated half-bridge power semiconductor module with a temperature sensor, and the module comprises a heat dissipation bottom plate, an insulating ceramic layer, a functional metal layer which forms a circuit pattern, and a low-side power semiconductor chip and a high-side power semiconductor chip which are disposed on the functional metal layer, the low-side power semiconductor chip and the high-side power semiconductor chip are connected in an up-and-down stacking mode through a middle metal layer and are electrically connected with the power terminal, the first temperature sensor is fixedly arranged on the upper surface of the ceramic material to jointly form a sensing composite body, and the first temperature sensor is electrically connected with the high-side power semiconductor chip. The temperature sensor has the beneficial effects that the temperature sensor is directly and fixedly arranged on the key heat flow path metal conductor by taking the high-thermal-conductivity and insulating ceramic material as a carrier, so that a thermal circuit is effectively shortened, the response speed is increased, the measurement precision is improved, the junction temperature is truly reflected, the junction temperature of the chip is rapidly and accurately monitored, and the high-voltage insulation safety is ensured.

The utility model discloses a hydraulic oil temperature adjusting system which comprises a hydraulic oil tank, a temperature sensor, a refrigerating loop, a heating loop, a mixing device and a controller, and the temperature sensor is arranged in the hydraulic oil tank and used for monitoring the temperature of hydraulic oil in the hydraulic oil tank. The refrigerating loop comprises a condenser, a cold water supply pipe, a cold water return pipe, an external cold source and a refrigerating electromagnetic valve which are sequentially communicated end to end, the condenser is arranged in the hydraulic oil tank, the refrigerating electromagnetic valve is arranged on the refrigerating loop, and the heating loop comprises a heater, a hot water supply pipe, a hot water return pipe, an external heat source and a heating electromagnetic valve which are sequentially communicated end to end. The heater is located in the hydraulic oil tank, the blending device is arranged in the hydraulic oil tank, the controller is electrically connected with the temperature sensor, the blending device, the refrigerating electromagnetic valve and the heating electromagnetic valve, and the controller controls the refrigerating loop or the heating loop to conduct cooling or heating adjustment on hydraulic oil in the hydraulic oil tank so as to adapt to more different working conditions.

The invention discloses an organic Rankine cycle power generation system driven by exhaust waste heat of a centrifugal compressor, and the system comprises a self-adaptive variable structure waste heat collection module which drives a fin through a stepping motor to adjust a helical angle, matches exhaust temperature fluctuation, and is provided with a double-medium heat exchange loop to realize dynamic storage and release of waste heat; according to the cascade expansion power generation module, two-stage expansion machines are connected in series with a pressure matcher, and a working medium diverter valve is configured to dynamically adjust the working medium proportion; the intelligent coupling power generation and electric energy management module integrates a magnetic resistance switching type permanent magnet synchronous generator technology and a virtual synchronous generator technology and is provided with a dynamic reactive power compensation device; and the multi-parameter cooperative control module optimizes system parameters based on a model prediction control algorithm, and introduces entropy production analysis to monitor irreversible loss. The self-adaptive structure optimizes the heat exchange process, cascade expansion widens the working condition adaptation range, cooperative control reduces irreversible loss, the self-repairing system prolongs the maintenance period, and deep utilization and efficient conversion of waste heat of the centrifugal compressor are achieved.

To provide a thermal circuit model generation device, a state monitoring device, a thermal circuit model generation method, and a program capable of suppressing the number of components of a temperature measurement unit.SOLUTION: A thermal circuit model generation device according to an embodiment of the present invention is a device that generates thermal circuit information of an object that inputs and outputs a current, and includes a region generation unit and a thermal resistance generation unit. The area generation part generates at least a first calculation area and a second calculation area along a first axis of a corresponding area corresponding to the object. The thermal resistance generation unit generates, in a first calculation region, a first thermal resistance in a first axis direction according to a first heat transfer surface orthogonal to a first axis and a first heat transfer distance in the first axis direction based on a main propagation component of a heat flow propagating in a direction different from the first axis and a second axis orthogonal to the first axis.SELECTED DRAWING: Figure 4

The application relates to the technical field of solar power generation, in particular to a combined cooling, heating and power (CCHP) system. A first heat storage circuit is used for collecting solar energy and storing the solar energy as low-temperature heat energy; a second heat storage circuit is coupled with the first heat storage circuit and is used for converting the low-temperature heat energy into high-temperature heat energy and storing the high-temperature heat energy; a user heat circuit is coupled with the first heat storage circuit and / or the second heat storage circuit and is used for transmitting a heat source to a user heat end; a user cold circuit is coupled with the first heat storage circuit and / or the second heat storage circuit and is used for generating a cold source and transmitting the cold source to a user cold end; and a power generation circuit is coupled with the second heat storage circuit and is used for converting the high-temperature heat energy into electric energy. Through the synergistic integration of multi-stage energy storage, hierarchical heat coupling and multi-end energy output, the application realizes efficient and full-grade cascade utilization of solar energy, significantly reduces heat loss, meets the multiple demands of users for power generation, heat supply and refrigeration, greatly improves the overall energy utilization efficiency of the system and avoids resource waste.

The invention discloses a transformer direct current magnetic bias temperature rise calculation method, system, medium and equipment, and the method comprises the steps: carrying out the classification estimation of the non-linear magnetic resistance value of each part of an iron core structure based on the magnetization characteristic of an iron core material, and obtaining the magnetic resistance estimation value of each part; building a transformer iron core magnetic circuit simulation model according to the magnetic resistance estimated value of each part to obtain a saturation magnetization characteristic phi-i curve of the transformer; a transformer circuit-magnetic circuit model is built, and winding current and iron core magnetic flux are obtained through circuit and magnetic circuit coupling calculation; establishing a transformer thermal circuit lumped parameter model under the direct current magnetic bias condition based on a thermoelectric analogy method, and fitting thermal capacity and thermal resistance parameters in the transformer thermal circuit lumped parameter model according to data of a transformer temperature rise experiment; in combination with short-circuit test data of the transformer, calculating winding loss of the transformer under direct-current magnetic bias; based on the BP loss characteristic of the iron core material, calculating the iron core loss of the transformer under the direct current magnetic bias; and temperature rise is calculated based on the transformer thermal circuit lumped parameter model.

The invention discloses a cooling unit and a control method of the cooling unit, the cooling unit comprises an indirect heat exchange system and a wet film, the indirect heat exchange system comprises an indoor coil pipe, an outdoor coil pipe and a circulating water pump, the indoor coil pipe and the outdoor coil pipe are connected end to end to form a heat exchange loop, and the circulating water pump is arranged on the heat exchange loop; the heat exchanger is used for driving a heat exchange medium to circularly flow between the indoor coil and the outdoor coil; the wet film is arranged adjacent to the indoor coil pipe. According to the cooling unit, heat exchange between indoor air and the indoor coil pipe can be achieved through heat exchange between outdoor air and the outdoor coil pipe, and cooling of the indoor air is achieved. And the flow resistance to indoor air and outdoor air can be effectively reduced, so that the energy consumption of the cooling unit can be reduced, and the effects of saving energy and reducing consumption are achieved. And the wet film is arranged adjacent to the indoor coil pipe, so that the humidity of indoor air can be increased, the indoor environment can be humidified, meanwhile, the indoor air can be further cooled, and the temperature and humidity control function of the cooling unit can be achieved.

The invention provides refrigeration equipment, a control method and a control device, and relates to the technical field of refrigeration control, and the control method is suitable for a refrigeration system with double refrigeration circuits and a cooling water heat exchange circuit. The refrigeration equipment comprises a first refrigeration loop, a second refrigeration loop and a first heat exchange loop. Based on the environment load signal, the start and stop states of the first compressor and the second compressor are dynamically controlled, and energy efficiency scheduling under different loads is achieved; the air suction and exhaust parameters and the liquid outlet temperature of each refrigerating circuit are collected, the superheat degree is calculated, the opening degree of an electronic expansion valve is adjusted, and stable liquid supply of an evaporator is ensured; meanwhile, the opening degree of an electric adjusting valve of each plate heat exchanger is controlled according to the exhaust temperature or pressure, and the condensate water flow is adjusted; and condensation control is further optimized in combination with liquid outlet temperature feedback. According to the method, efficient operation and condensation decoupling of the system under different load working conditions can be achieved, and the overall refrigeration performance and stability are improved.

According to the ship waste heat multi-source coordinated recovery method and system, ship multi-source temperature signals and heat exchange pipeline layout are collected, and heat value rating is carried out on the temperature signals to form heat grade distribution; high-quality hot spots are positioned to establish heat exchange contact, and a dense heating area is formed through cascade strengthening; constructing a thermal load fluctuation curve to identify an intermittent heat supply source, and establishing a thermal circuit intersection to form a flexible heat supply field; dividing effective temperature levels, configuring hierarchical heat exchange to generate a stepped utilization chain, and forming a heat storage and release network output coordination control table; exporting a flow direction guide field, identifying a heat loss node, setting a compensation channel, remodeling a network thermal state through gradient utilization network mapping to obtain a whole network thermal spectrum, and identifying heat flow convergence characteristics to determine a convergence center; and carrying out supply-demand coordination analysis to identify a supply-demand difference value and a reserve capacity, carrying out fluctuation evaluation to generate a coordination margin configuration regulation and control response strategy, completing waste heat multi-source coordination recovery, and improving the ship energy utilization efficiency and the system operation stability.

Disclosed in embodiments of the present description is an aircraft heat dissipation management method. The method comprises: for key components of an aircraft, respectively building corresponding thermal circuit models; on the basis of the thermal circuit models, determining temperature change data of corresponding key components; and on the basis of the temperature change data, evaluating available heat dissipation modes to obtain a heat dissipation management result.

The invention relates to the technical field of commercial spaceflight, in particular to a self-repairing liquid metal heat pipe for commercial spaceflight, which comprises a polyether-ether-ketone composite pipe, gallium bismuth zinc liquid gold, a micro-nano repairing film, a main hot runner, a pressure detector, a standby hot runner and an emergency plugging valve, and the main hot runner is an axial through channel in the polyether-ether-ketone composite pipe, and the standby hot runners are annularly and circumferentially arrayed along the inner wall of the main hot runner. Compared with heat conduction in the prior art, medium leakage is stopped through cooperative plugging in a damaged scene, so that the heat conduction efficiency is improved, and the service life of the heat exchanger is prolonged. And meanwhile, the detector is in signal linkage with the plugging valve, a heat transfer loop is rapidly switched in the case of serious damage, the continuous and stable thermal control function is achieved, and therefore the on-orbit operation life of a spacecraft is further prolonged.

The application discloses a heat recovery system, method, device, equipment and medium, comprising: obtaining a target operating state of an air conditioning loop; when the target operating state is a refrigeration state, controlling a refrigeration sub-loop and a second sub-loop to operate; when the target operating state is a heating state, controlling a heating sub-loop and a first sub-loop to operate, or controlling the heating sub-loop, the first sub-loop and the second sub-loop to operate. The application realizes heat exchange between the air conditioning loop and the heat dissipation loop of the vehicle system through a water-cooled condenser, recycles heat of the vehicle system in the heating state, thereby reducing energy consumption of the air conditioning equipment using the vehicle power supply, improving the heat recovery rate of the vehicle system, that is, improving the utilization rate of heat generated by the vehicle system during operation, realizing effective utilization of the vehicle waste heat, improving the heating comfort of the passenger cabin, reducing the vehicle power consumption, and thereby improving the cruising range of the automobile at low temperature.

The application belongs to the technical field of lithium battery safety, and specifically discloses a lithium battery internal temperature online estimation method and system, specifically: a battery thermal circuit sparse parameter model for lithium battery online internal temperature estimation is established; a lithium battery internal temperature estimation model based on a neural network and a time sequence convolution network is established based on physical information fusion; and a lithium battery online internal temperature estimation system based on embedded edge calculation is constructed. The application realizes high-precision internal temperature estimation, does not need to identify model parameters online, has small calculation amount, and has strong generalization ability and engineering application value.

The invention relates to the technical field of automobile thermal management, and discloses a dynamic thermal management control method, device and equipment for an extended-range automobile and a medium, and the method comprises the steps that the temperature of a warm core side water outlet is determined according to the temperature of a warm core side water inlet of a cabin warm core loop, the flow of warm core cooling liquid and a cabin thermal load; the battery side water outlet temperature is determined according to the battery side water inlet temperature, the battery cooling liquid flow and the battery thermal load of the battery heat exchange loop; according to the warm core side water outlet temperature, the battery side water outlet temperature, the warm core cooling liquid flow and the battery cooling liquid flow, a mixed water temperature calculation value of the junction is determined; and the engine water outlet temperature of the engine cooling loop is obtained, the mixed water temperature calculation value is compared with the engine water outlet temperature, and heat management control is carried out according to the comparison result. According to the invention, sensorless multi-loop thermal management cooperative control is realized, the hardware cost and the failure rate are greatly reduced, and the energy utilization rate is effectively improved.

The application discloses a kind of conductor operation risk assessment method, system and its terminal equipment, belong to conductor state assessment technical field, this method is: based on real-time operating tension and conductor structure parameter acquisition interlayer comprehensive contact thermal resistance set;Based on real-time line current, conductor structure parameter and preset skin effect coefficient calculation unit length heat generation rate, based on unit length heat generation rate and interlayer comprehensive contact thermal resistance set constructs radial temperature distribution thermal circuit model;Conductor surface layer temperature and ambient temperature are input in radial temperature distribution thermal circuit model to obtain real-time temperature;Based on real-time temperature and temperature-mechanical property degradation model obtains tensile strength, to based on tensile strength and conductor structure parameter calculation limit bearing capacity;Based on real-time operating tension to obtain actual share load and calculate safety margin, to based on safety margin and preset safety threshold value output the risk assessment result of to-be-measured conductor, realize to the precise dynamic evaluation of each layer failure risk in conductor internal.