471results about "Material thermal conductivity" patented technology

The invention discloses an earth heat flow joint inversion calculation method, device and system, and a storage medium. The method comprises the following steps: 1, obtaining a temperature constraint value; 2, obtaining a thermal parameter constraint value; 3, determining value ranges of thermal conductivity and heat generation rate parameters of each layer section; 4, constructing an initial temperature profile; 5, carrying out inversion optimization to obtain an optimal thermal parameter; and 6, calculating and extracting an earth heat flow value. By adopting the technical scheme of the invention, a high-precision and high-reliability earth heat flow value can be obtained under the constraint of a small amount of measured data.

A thermal conductivity detector (1) is provided with: a cell block (2) provided with a measuring cell (10) in which a heating wire (12) for exchanging heat with a gas is arranged, the cell block (2) being provided with a cell inlet (11) for flowing the gas into the measuring cell (10) and a cell outlet (13) for flowing the gas out of the measuring cell (10); an outlet flow path (4) leading to the cell outlet (13) of the cell block (2); a buffer block (6) having a buffer space (14) in the inside and having a flow inlet (15) for flowing the gas into the buffer space (14) and a discharge outlet (16) for discharging the gas from the buffer space (14), the flow inlet (15) being fluidly connected to the outlet flow path (4); and a discharge member (8) holding a fluid resistance portion (20) for increasing a fluid resistance of the discharge outlet (16) and being installed to the buffer block (6) in a manner that the gas discharged from the discharge outlet (16) passes through the fluid resistance portion (20), the discharge member (8) being provided to be able to be detached from the buffer block (6) together with the fluid resistance portion (20).

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

The invention provides a soil moisture content calculation method based on an optical fiber temperature measurement technology, which comprises the following steps: acquiring a dry soil heat conductivity coefficient, dry soil density and porosity of a target area and a heat conductivity coefficient and density of water in the target area as soil basic parameters; based on an active heating method, obtaining temperature measurement values of the target area under different radial distances after the target area is heated to a steady state; the soil body basic parameters and the temperature measurement value are substituted into a soil body moisture content formula, and the soil body moisture content of the target area is obtained; wherein the soil mass moisture content formula is pre-constructed based on a soil mass steady-state heat conduction equation and the relationship between the heat conduction coefficient and the soil mass basic parameters, and represents the relationship among the heat conduction coefficient of the soil mass, the temperature and the soil mass moisture content. According to the method, the soil moisture content formula representing the relation among the soil basic parameters, the temperature measurement value and the soil moisture content is constructed, and tedious laboratory operation needed by an existing active heating method is simplified.

The invention discloses a test device and method for in-situ monitoring of hydrates by using thermal-electric coupling, and belongs to the technical field of experiments for simulating generation and decomposition of hydrates in laboratories. The device comprises a hydrate synthesis and decomposition system, a temperature control system, a pressure control system, a thermal-electric parameter measurement system, a gas collection system and a data acquisition and user monitoring system, wherein a multi-point temperature sensor, a resistivity measurement probe and a heat conductivity coefficient measurement probe are arranged in a reaction kettle cavity; in-situ and real-time monitoring of multiple physical property parameters such as temperature distribution, resistivity change and heat conductivity coefficient in the whole process of generation and decomposition of the hydrate sample can be realized. According to the invention, thermal-electric coupling monitoring can be realized under high-pressure and low-temperature conditions, and a high-precision means is provided for hydrate formation mechanism research and exploitation processes.

The invention provides a prediction method based on the wear state of a steel-based ceramic wear-resistant component, and relates to the technical field of material life evaluation, and the prediction method comprises the following steps: transmitting an excitation eddy current containing a first frequency and a second frequency to a steel substrate, and receiving a response signal modulated by the state of a steel substrate and ceramic-steel bonding interface; processing the response signals corresponding to the first frequency and the second frequency, and extracting a first phase variation of the first frequency relative to a first reference signal corresponding to the initial health state of the component and a second phase variation of a second reference signal corresponding to the second frequency; the difference quantity between the first phase change quantity and the second phase change quantity is calculated, and the heat conduction state change of the ceramic-steel bonding interface is represented; and acquiring the real-time working temperature of the wear-resistant part, evaluating the current state grade of the ceramic-steel bonding interface based on the real-time working temperature and the difference quantity, and predicting the residual safe service time of the ceramic wear-resistant layer in combination with the change trend of the difference quantity along with time.

A metrology system may measure thermal conductance across an interface between a first material layer bonded to a second material layer. The first material layer may include a first outward facing and the second material layer may include a second outward facing surface. The system may include a heating source which provides periodically varying heat across the first outward facing surface, and a heat sink in contact with the second outward facing surface. The system may further include a first thermal measurement device configured to measure a temperature of the first outward facing surface, and a second thermal measurement device configured to measure a temperature of the second outward facing surface. The system may generate, based on a plurality of measurements acquired over time, a thermal conductance measurement across the interface between the first material layer bonded to the second material layer.

One or more implementations of the present disclosure relate to a wireless, multi-sensor food thermometer that includes a temperature probe having a linear array of temperature sensors that are operative to measure: temperature profiles within a food product during a cooking process, a temperature at a core of the food product, a temperature at the surface of the food product, and a temperature of the ambient cooking environment in which the food is being cooked. The temperature probe includes a wireless interface that transmits temperature information to one or more external devices for use thereby. Rather than transmitting raw temperature data, the temperature probe may transmit coefficients that correspond to a function that describes the temperature profile within the food or parameters necessary to solve a governing heat equation, which reduces data transmission requirements and reduces power consumption. The food thermometer may include a charger case that houses the temperature probe and charges a power source of the temperature probe using a replaceable battery.

The utility model belongs to the technical field of battery heat conductivity coefficient testing, and discloses a battery heat conductivity coefficient testing device which comprises a heating film and two liquid cooling plates. The heating film is used for being clamped between two batteries to be tested, a center thermocouple is arranged at the center of the heating film, and the center thermocouple can collect the temperature of the center of the heating film. The two to-be-tested batteries are clamped between the two liquid cooling plates, a plurality of preset point positions are respectively arranged on two outer side surfaces, which are opposite to each other, of the two to-be-tested batteries, a plurality of first thermocouples and a plurality of second thermocouples are respectively arranged on the two outer side surfaces, the plurality of first thermocouples can collect temperatures of the plurality of preset point positions on one to-be-tested battery, and the plurality of second thermocouples can collect temperatures of the plurality of preset point positions on the other to-be-tested battery. And the plurality of second thermocouples can collect the temperature of a plurality of preset point positions on another battery to be detected. The battery heat conductivity coefficient testing device can accurately and quickly measure the anisotropic heat conductivity coefficient of the battery to be tested.

The invention discloses a heat pipe thermophysical property testing device, system and method based on liquid cooling flow equalization, and the device comprises a liquid cooling flow equalization system which is provided with a plurality of parallel and mutually isolated flow channels, and a condensation section of a to-be-tested heat pipe is inserted into a liquid cooling cavity to form forced convection; an upper heating block and a lower heat insulation block of the heating unit clamp and fix an evaporation section of the heat pipe to be tested; the liquid cooling flow equalizing system is arranged on the inclination angle adjusting mechanism; the data acquisition unit comprises temperature sensors which are respectively arranged at liquid inlets and liquid outlets of the flow channels, and at least two temperature sensors which are arranged at a heat insulation section of the heat pipe to be tested; according to the system, a circulating water bath device, a high-pressure constant-flow pump, a filter and a testing device form a closed-loop liquid path. The real heat transfer amount of the heat pipe is inversely calculated through the heat absorption amount of the cooling liquid, the equivalent heat conductivity coefficient and the limit power are obtained by combining the two-point temperature difference of the heat insulation section, multiple heat pipes of different specifications are tested in parallel at a time, and the test efficiency and the data accuracy are improved.

The invention relates to the technical field of fuel cells, in particular to a fuel cell gas diffusion layer performance comprehensive evaluation method and system and electronic equipment. The method comprises the following steps: acquiring multiple evaluation parameters of a target gas diffusion layer in the fuel cell under an actual working condition; wherein the multiple evaluation parameters comprise a polarization test performance parameter, an electrochemical impedance spectroscopy test performance parameter and a heat conduction test performance parameter; and obtaining a pre-constructed comprehensive evaluation model, and substituting the multiple evaluation parameters into the comprehensive evaluation model to obtain a comprehensive evaluation result of the target gas diffusion layer. Therefore, according to the fuel cell gas diffusion layer performance comprehensive evaluation method and system and the electronic equipment provided by the invention, the problem that an existing evaluation system only measures a single function and neglects a synergistic effect is fundamentally solved, comprehensiveness of evaluation dimensions is realized, designers can be helped to avoid overview decision errors, and the evaluation precision is improved. And a clear basis for model selection or GDL structure optimization guidance can be provided for designers.

The invention relates to the technical field of diving suit detection, and discloses a high-pressure diving suit detection device and method, and the device comprises the following steps: a high-pressure simulation cabin which is used for simulating the high-pressure environment of a deep sea, and providing the testing conditions of a diving suit under different depth pressures; the warm dummy simulates a human body and can heat different parts of the dummy in an underwater high-pressure environment, so that real-time visualization of body surface temperatures of all the parts of the human body in the underwater high-pressure environment is achieved, temperature control data can be recorded in real time, and a diving suit in detection can be worn on the warm dummy in real time; and the temperature control system simulates the heat distribution and heat loss rule of the human body by adjusting the temperature of each part of the thermal dummy. Multi-dimensional environmental parameters including pressure, temperature and humidity can be simulated through the high-pressure simulation cabin, so that the actual working state of the diving suit in the deep sea can be effectively represented, comprehensive test conditions are provided, the test result is close to the real use situation, and the reliability and safety of the diving suit in the extreme environment are ensured.

A thermal measurement system includes a temperature-controlled chamber configured to house a Device Under Test (DUT) and a first temperature sensor to measure an external temperature of the DUT inside the temperature-controlled chamber. The thermal measurement system further includes a heating device for heating a test material outside the temperature-controlled chamber and a controller configured to control the heating device to heat the test material to the external temperature measured by the first temperature sensor of the DUT inside the temperature-controlled chamber. In one aspect, a thermethesiometer indicates a skin effect of a surface temperature of the test material outside the temperature-controlled chamber.

The utility model provides a heat conductivity coefficient testing device and a testing system, relates to the technical field of battery detection, and aims to solve the problem of high detection cost caused by customization of matched clamp equipment with corresponding sizes when heat conductivity coefficients of batteries with different sizes are detected to a certain extent. The utility model provides a heat conductivity coefficient testing device. The heat conductivity coefficient testing device comprises a box body, a cover plate, a heating assembly and a sliding assembly, a containing space is formed in the box body, the cover plate covers an opening of the box body, and the heating assembly is arranged at the bottom of the containing space. The sliding assembly comprises a sliding part and a first heat insulation part, the sliding part is at least located on one side wall of the box body and can penetrate through the side wall of the box body to slide relative to the box body, and the first heat insulation part is correspondingly connected with the sliding part so that at least one clamping face can be formed in the direction parallel to the side wall, where the sliding part is located, of the box body.

A method for detecting a defect in a bonded wafer includes receiving the bonded wafer on a wafer holder, the bonded wafer including a first structure bonded to a second structure, the first structure including first contacts, the second structure including second contacts, and the first structure bonded to the second structure forming a bonding layer including metal contacts between the first contacts and the second contacts. The method further includes illuminating a portion of the first structure for a first time duration to heat the portion of the first structure to a starting temperature, and detecting, using a light detector, a temperature map of the bonded wafer, the temperature map being detected after a second time duration. And the method further includes determining, based on the temperature map, the defect in the bonding layer of the bonded wafer.

A computer-implemented method of determining subsurface thermal conductivity of target soil is disclosed. The method comprises receiving, from a heat flow penetrometer that is surrounded by target soil, temperature data comprising a temperature at each time point of n time points, determining, for each time point a measured temperature difference, based on estimated values of thermal conductivity and volumetric heat capacity of the target soil, using a solution space to generate a calculated temperature difference for the estimated values of thermal conductivity and volumetric heat capacity for each of a predetermined series of time points of the solution space. The solution space comprises a plurality of values of thermal conductivity, a plurality of values of volumetric heat capacity, and pre-computed values of temperature difference for each combination of values of thermal conductivity and volumetric heat capacity and for each of the predetermined series of time points of the solution space. Unlocking insights from Geo-Data, the present invention further relates to improvements in sustainability and environmental developments: together we create a safe and liveable world.

To provide a method that obtains thermal properties of a contact region.SOLUTION: A method of the present application comprises: receiving temperature data on a sensor; obtaining a temperature distribution of heat penetration from the sensor into at least one material; applying a correction to the temperature distribution; iteratively analyzing the corrected temperature distribution; and outputting thermal properties of a contact region being a region between the sensor and the at least one material. The method of the present application may further comprise: obtaining thermal properties of at least one material; and obtaining a corrected thermal property of a material using the thermal property of the contact region. The method of the present application may further comprise automatically obtaining appropriate measurement duration for measuring properties of the at least one material to minimize effects of the contact region.SELECTED DRAWING: Figure 1

A thermal flow sensor (2) determines the flow rate of the fluid (1); a sensor body (11) having a flow cross section (12) through which a fluid flows in a flow direction (3) in use; a flow sensor arrangement (13) including a plurality of flow sensing elements (14) arranged at a plurality of positions within the cross-section of the flow path to measure the flow velocity at different positions within the cross-section of the flow path; The plurality of flow rate detection elements (14) are arranged parallel to one another in a plane parallel to the cross section of the flow path, and a single flow rate detection element (14) among the plurality of flow rate detection elements (14) can be read out.

The utility model relates to the technical field of seepage heat transfer simulation, and discloses a high-efficiency seepage heat transfer simulation device in a high-temperature and high-pressure environment, which comprises a supporting mechanism for stable supporting, and a seepage sealing assembly for simulating a rock-soil layer in an earth crust is arranged at the upper end of the supporting mechanism. The upper end of the seepage sealing assembly is provided with a sealing heating monitoring assembly used for heating and monitoring fluid to be percolated, and the upper end of the sealing heating monitoring assembly is provided with a pressurizing mechanism used for pressurizing the fluid to be percolated in the sealing heating monitoring assembly. Simulation operation of seepage fluid is achieved, damage to equipment under the high-pressure condition is avoided, the driving mechanism accurately adjusts pressure through gear transmission, stable operation of a pressurization system and coordinated operation of the whole system are ensured, the precision of seepage and heat transfer simulation is improved, and the operability and safety of experiments are effectively improved.

The utility model relates to a cold region tunnel thermal insulation structure test system, and relates to the technical field of tunnels. The cold region tunnel thermal insulation structure test system comprises a sealing chamber, a tunnel model of a target tunnel, a temperature regulator, a thermal insulation layer and a plurality of temperature sensors. The tunnel model is arranged in the sealing chamber, the sealing chamber comprises an outlet, and the outlet is sealed through a heat preservation structure; the tunnel model comprises a tunnel, a surrounding rock, and a primary support and a secondary lining which are arranged between the tunnel and the surrounding rock, and the thermal insulation layer is arranged between the primary support and the secondary lining; the temperature regulator is arranged in the sealed chamber and used for regulating the temperature of the environment where the tunnel model is located; the multiple temperature sensors are arranged in the tunnel and the surrounding rock and used for monitoring the temperature of the tunnel and the surrounding rock. The test equipment capable of reducing the low air temperature and the high surrounding rock side temperature in the tunnel hole in the cold region is closer to the actual condition of tunnel engineering.

The invention belongs to the technical field of high-temperature heat pipe heat transfer performance testing, and particularly relates to a high-temperature heat pipe performance testing device and method under the microgravity condition. The device comprises a heat pipe performance test body, a test cabin, a protection recovery system and a high-altitude carrying platform, the heat pipe performance test body is arranged in the test cabin, and the high-altitude carrying platform comprises a lift-off mechanism and a release mechanism and is used for sending the test cabin to an airspace at a specified height and releasing the test cabin to realize free falling of the test cabin. The protection recovery system adopts two-stage deceleration buffering to protect the test cabin. The device has the advantages of being controllable in cost, long in microgravity time and capable of being repeatedly used, performance testing of the large-length-diameter-ratio heat pipe under the simulated space microgravity environment can be carried out, and the performance of the high-temperature heat pipe under the real working condition can be accurately and comprehensively evaluated; the device is especially suitable for testing the starting characteristic, transient and steady-state characteristics and temperature uniformity of the high-temperature heat pipe under the microgravity condition.

The invention provides an online monitoring method, device and equipment for heat exchanger dirt, and relates to the field of heat exchangers. The problem that the gathering condition of dirt in the heat exchanger cannot be monitored online in real time in the prior art is solved. The detection method comprises the steps that current operation parameters of a target heat exchanger are obtained; determining the current dirt resistance value of the target heat exchanger according to the current operation parameters and the equipment parameters of the target heat exchanger; the current heat exchange coefficient of the target heat exchanger is determined according to the current dirt resistance value and the initial heat exchange coefficient of the target heat exchanger; and according to the current heat exchange coefficient of the target heat exchanger, a dirt detection result of the target heat exchanger is determined, and the dirt detection result is output and displayed. According to the scheme, real-time detection of dirt in the heat exchanger and real-time monitoring of the heat exchange efficiency of the heat exchanger are achieved, the heat exchange efficiency of the heat exchanger is improved, and the maintenance cost of the heat exchanger is reduced.

This invention is a battery case evaluation system 100 for evaluating thermal characteristics of a battery case (BC) constituting a battery pack or a component of the battery case (BC). The battery case (BC) comprises a simulated battery 10 that is installed within the battery case (BC) and that is to simulate thermal behavior of the actual battery which is a component of the battery pack, a power supply device 20 that supplies power to the simulated battery 10, and a control device 30 that controls the power supply device 20. The control device 30 comprises a parameter receiving unit 31 that receives an input profile indicating time-dependent change of a current, a voltage, or power supplied to the actual battery as one of evaluation parameters, a resistance value calculation unit 331 that calculates a resistance value of the actual battery which changes over time based on simulated battery temperature and the input profile, and a power supply control unit 33 that controls the power supply device 20 using the resistance value calculated by the resistance value calculation unit 331.

According to one embodiment, a detection device of an embodiment includes a package having a lid, and a sensor substrate that is located inside the package and holds a sensor chip. The lid has two or more holes in a second region which is a region outside a first region which is a region facing the sensor chip in the lid.

The invention discloses a method and system for determining anisotropic thermoelectric performance of a material based on tensor inversion, and the method comprises the steps: obtaining an Euler angle of a single crystal or texture polycrystalline sample in any orientation through electron back scattering diffraction, and building a rotation matrix between a sample coordinate system and a crystal coordinate system; measuring thermoelectric parameters such as resistivity, thermal conductivity and / or Seebeck coefficient under the sample coordinate system; and constructing a linear equation set based on a second-order tensor rotation formula, and inversely solving an intrinsic thermoelectric tensor component under a crystal coordinate system. According to the method, the intrinsic anisotropic thermoelectric performance of the material along the crystal main axis can be accurately obtained without strict crystal orientation cutting, and the method has the advantages of being high in universality, high in precision, easy and convenient to operate and the like and is suitable for high-throughput characterization of complex crystal system materials and device optimization design.

This application provides a method for predicting the wear state of steel-based ceramic wear-resistant components, relating to the field of material life assessment technology. The method includes the following steps: emitting excitation eddy currents containing a first frequency and a second frequency into a steel substrate, and receiving the response signal modulated by the state of the steel substrate and the ceramic-steel interface; processing the response signals corresponding to the first and second frequencies respectively, extracting the first phase change of the first reference signal corresponding to the initial health state of the component relative to the first frequency, and the second phase change of the second reference signal corresponding to the second frequency; calculating the difference between the first and second phase changes to characterize the change in thermal conductivity state of the ceramic-steel interface; obtaining the real-time operating temperature of the wear-resistant component, and based on the real-time operating temperature and the difference, assessing the current state level of the ceramic-steel interface, and predicting the remaining safe service time of the ceramic wear-resistant layer by combining the trend of the difference over time.

The invention provides a supercritical carbon dioxide heat exchange experiment system and method. The system comprises a supercritical carbon dioxide circulation system, a multi-working-medium heat exchange experiment section, a carbon dioxide heat pump system and a data acquisition and analysis system. The pressure control unit realizes self-adaptive adjustment of the pressure value of a pressure stabilizing module in the supercritical carbon dioxide circulating system by adopting a grading pressure control mechanism according to the real-time parameters acquired by the data acquisition and analysis system; the multi-working-medium heat exchange experiment section comprises a heat exchanger, a modularized multi-working-medium heat exchange cabin and a heater; the modularized multi-working-medium heat exchange cabin comprises multiple working medium tanks, and the multiple working medium tanks are selected for use or combined for use during heat exchange. According to the scheme, high-efficiency heat exchange performance research with various heat exchange media can be achieved, the experimental requirements of ultrahigh-pressure and high-temperature working conditions are met, modular design is achieved, the device is suitable for energy conversion, multi-system coupling and dynamic regulation and control tests, and the three technical bottlenecks of difficult quality exchange, unstable control and inaccurate measurement existing in the field for a long time are solved.

This invention belongs to the field of supercritical carbon dioxide property monitoring and discloses a method and system for predicting the thermal properties of CO2 in an SCO2 Brayton cycle system. The method includes: acquiring index data of the CO2 working fluid as it flows through a preset property measurement module; calculating the static pressure data within the Coriolis density meter based on the readings of a Coriolis density meter, a temperature sensor, and a pressure sensor; determining the phase state of the CO2 working fluid based on the static pressure data and the temperature sensor reading; and obtaining the predicted results of preset thermal property indicators of the CO2 working fluid based on the phase state of the CO2 working fluid and in conjunction with the static pressure data and the Coriolis density meter reading or the temperature sensor reading. This invention can accurately predict the thermal property parameters of the CO2 working fluid, providing reliable data support for the precise control of the precooler, thereby ensuring the safe and stable operation of the entire SCO2 Brayton cycle system.