65 results about "Evaporation rate" patented technology

The invention provides a fouling risk calculation method and equipment of a reactor and a storage medium, and relates to the technical field of nuclear reactors. The reactor fouling risk calculation method provided by the invention comprises the following steps: step S110, acquiring input parameters; s120, the mass evaporation rate is calculated based on the input parameters; step S130, calculating the dirt thickness of the reactor core based on the mass evaporation rate; step S140, calculating boron deposition mass based on the dirt thickness of the reactor core; step S150, judging whether a convergence condition is met or not, if the convergence condition is met, entering step S160, and otherwise, returning to step S110; and step S160, outputting a calculation result. According to a risk formation mechanism and important phenomena caused by reactor fouling, the fouling thickness and the boron deposition quality of the reactor core are calculated based on the input parameters, so that risks, including CILC risks and CIPS risks, caused by fouling are evaluated.

The invention discloses a liquid hydrogen container heat leakage prediction and boost characteristic detection method and system. The method comprises the following steps: establishing a three-dimensional heat flow field model of a liquid hydrogen container; calculating the heat flow density of a gas-liquid interface based on the three-dimensional heat flow field model so as to adjust the liquid hydrogen evaporation capacity; total heat leakage is obtained through finite element simulation and experimental data collaborative calibration; calculating a static evaporation rate according to the total heat leakage; establishing a nonlinear mapping model of the static evaporation rate and the boost rate through a response surface regression method; the wall temperature distribution of the liquid hydrogen container is monitored in real time, thermophysical parameters are calibrated through the LSTM neural network by adopting a dynamic calibration algorithm, and the output result of the three-dimensional heat flow field model is corrected. By establishing a three-dimensional heat flow field model of the liquid hydrogen container, determining a nonlinear response relationship between the evaporation rate and the pressure rising rate of the liquid hydrogen container, and constructing a cloud-edge collaborative detection system, the heat leakage performance of the liquid hydrogen container is accurately predicted, and efficient pressure rising rate detection is realized.

The invention discloses an unconventional feed quality assessment method and system, and relates to the technical field of unconventional feed quality assessment, and the method comprises the following steps: in a feed high-temperature drying treatment process, establishing a multi-dimensional sensing monitoring baseline, continuously obtaining mercury vapor concentration gradient, moisture evaporation rate and airflow velocity field data in a feed drying environment, and calculating the quality of the feed; forming a time sequence feature set reflecting the dynamic change of mercury vaporization; and constructing a gas-solid interaction analytical model by using the time sequence feature set, and carrying out coupling analysis on the mercury vapor migration trajectory and the temperature distribution and humidity distribution of the feed particle surface to generate a spatial distribution data set representing the spatial distribution feature of the mercury vapor redeposition region. According to the invention, the whole-process monitoring and dynamic regulation and control of mercury vaporization, migration and redeposition in the feed drying process are realized, through multi-dimensional monitoring, amplitude limiting control and high-frequency disturbance, the mercury distribution is balanced, the risk is reduced, the drying safety and the feed quality stability are improved, and the controllable management of heavy metal pollution is effectively realized.

The invention belongs to the field of liquid film evaporation heat transfer, and particularly relates to a method for judging the film scraping period of a scraper in the evaporation process of a high-viscosity material. Comprising the following steps: (1) establishing a calculation fluid domain geometric model, and setting parameters of the calculation fluid domain geometric model; the calculation fluid domain geometric model is of a cubic structure, the bottom surface is a heating wall surface, and the part above the bottom surface is a liquid film and gas area; (2) performing grid division on the geometric model of the computational fluid domain, and performing local grid encryption on a heating wall surface; (3) performing transient evaporation calculation on the geometric model of the computational fluid domain to obtain a change curve of the evaporation rate of the bottom of the liquid film along with time; and (4) analyzing the change curve of the evaporation rate of the bottom of the liquid film along with time, wherein the difference value between the moment tb corresponding to the highest point and the moment ta corresponding to the starting point is the film scraping period of the scraper. According to the method, the optimal scraping time of the high-viscosity material can be judged, the gas film is effectively damaged, the heat transfer coefficient is increased, the evaporation rate is increased, and the evaporation efficiency is optimized.

The invention provides a mass evaporation rate calculation method and device of a boiling environment and a readable medium. The mass evaporation rate calculation method comprises the following steps: carrying out node division on a pressurized water reactor coolant system; for each node, whether the dirt thickness of the current node is larger than a critical value or not is judged, if yes, the current node is the dirt surface, the mass evaporation rate of the node is calculated based on a porous sediment boiling module, and if not, the current node is the clean cladding surface, and the mass evaporation rate of the node is calculated based on the boiling heat flow and the mass evaporation module. According to the method, clean and dirty cladding surfaces are respectively considered, a group of mass evaporation rate calculation formulas are established, the mass evaporation rates of the reactor core and each node of the steam generator are calculated in detail according to information input by a user, and the calculated mass evaporation rates are more accurate and accord with actual scenes.

The embodiment of the invention provides an evaporation assembly, a temperature control method and device of the evaporation assembly and evaporation equipment, and belongs to the technical field of vacuum coating. The evaporation component comprises a crucible and a cover body, a cavity for placing an evaporation material is arranged in the crucible, and the cover body is used for covering an opening of the crucible; the nozzle is arranged on the cover body and is used for discharging the gasified evaporation material; the heating wire is arranged in the crucible and is used for heating the evaporation material; the temperature detection module is arranged in the crucible, located beside the heating wire and used for collecting the current temperature value in the crucible and sending the current temperature value to the temperature control module so that the temperature control module can control the power of the heating wire according to the current temperature value, the set rate and the current evaporation rate collected by the evaporation rate detection module. Therefore, the evaporation rate of the evaporation material is adjusted. According to the embodiment of the invention, the evaporation rate can be adjusted, and the sample production efficiency is improved.

The invention relates to the technical field of material performance testing, solves the technical problem that in the prior art, it is difficult to conduct multi-parameter heat and humidity performance testing on the same to-be-tested sample in a controllable testing environment, and provides a material heat and humidity performance testing method and system.The method comprises the steps that the to-be-tested sample is pretreated, and a first sample is obtained; placing the first sample in a first test environment, and supplying water to the first sample to obtain a first mass change curve; according to the first mass change curve, the capillary water absorption coefficient and the saturated water content are obtained through calculation; obtaining a second test environment according to the target climate parameters; and taking the first sample saturated by water absorption as a second sample, placing the second sample in a second test environment, and calculating to obtain an average evaporation rate and a cooling contribution value according to a second mass change curve and sample surface temperature data in the test process of the second sample. According to the invention, multi-parameter heat and humidity performance testing of the to-be-tested sample can be realized.

The present invention discloses a quantitative calculation method for the hydrogen and oxygen isotopes in surface water during the evaporation fractionation process in the field of isotope tracing technology, aiming to solve the problems of low calculation accuracy and large uncertainty in the existing calculation methods. It includes: analyzing the kinetic effect of the evaporation fractionation process; constructing the probability mass function of the isotope body and decomposing the ratio of the heavy / light isotope body; quantitatively describing the dissipation rate of the heavy / light isotope body in the evaporation fractionation; combining the water evaporation rate to obtain the change efficiency of the heavy / light isotope body during the evaporation fractionation process; and calculating the isotope body content in the remaining surface water. The present invention enhances the application adaptability of the calculation method to various conventional and extreme situations, reveals the isotope fractionation change law in surface water during the evaporation process, and improves the reliability of the results.

The application relates to the technical field of coal mine safety, and provides a coal spontaneous combustion behavior evolution method and system under multi-physical field coupling. The temperature field of coal body spontaneous combustion changes the volume by affecting the deformation amount, the porosity of the coal body is calculated through the volume, and then the thermal deformation is driven; the thermal deformation influences the water diffusion through the porosity, the residual moisture saturation of the coal body and the liquid phase saturation, and then the water migration is driven in combination with the evaporation rate and the liquid phase saturation; the water migration drives the heat transfer in combination with the evaporation rate, the effective thermal conductivity and the coal oxidation reaction rate, a cycle of "heat transfer-thermal deformation-water-heat transfer" is formed, the "heat-force-water-heat" coupling closed loop during the coal body spontaneous combustion is realized, the two-way coupling of the seepage field, the temperature field and the mechanical field is realized, and the problem that the prediction is inaccurate due to the neglect of thermodynamic deformation and dynamic changes of pores in a traditional model is effectively solved.

The present application relates to the technical field of low-temperature storage tank, in particular to a kind of evaporation rate dynamic monitoring method and system for static low-temperature storage tank, by obtaining the monitoring data of different liquid level in low-temperature storage tank, monitoring data includes steam concentration data, and airflow velocity data, air pressure data and liquid level monitoring data at different sampling positions;Analysis of monitoring data, determine the steam diffusion rate under different liquid level, and combine the change of liquid level data under different liquid level, determine the influence factor of airflow disturbance on evaporation rate under different liquid level, so as to correct the initial estimated evaporation rate under different liquid level based on the influence factor of airflow disturbance on evaporation rate.The present application corrects the initial estimated evaporation rate by analyzing the influence of airflow disturbance on evaporation rate under different liquid level, effectively improves the accuracy of low-temperature storage tank evaporation rate dynamic monitoring.

This invention provides a method for predicting the hazard range of oil fires on the water surface based on interface tracking coupled combustion dynamics. The method includes: using a conserved two-dimensional shallow water equation to describe oil film diffusion; spatial discretization using the finite volume method; mitigating frictional rigidity using the Strang splitting method; calculating flux using the Roe scheme; suppressing spurious flow using the Well-Balanced scheme; controlling the time step using CFL conditions; and outputting the oil film thickness hourly. A mass evaporation rate conversion model based on energy balance is constructed to transform the oil film thickness field into a mass evaporation rate field per unit area. The mass evaporation rate field is used as the bottom boundary source term of the fire dynamics model and coupled to the three-dimensional low Mach number Navier-Stokes equations through a volume source term, achieving real-time coupled simulation of oil film transport and fire spread. The combustion dynamics control equations, including the conservation of mass, momentum, energy, and components, are solved. Combined with the radiative transfer equations, the spatiotemporal distributions of the temperature field, thermal radiation flux, and flue gas concentration are calculated to achieve dynamic prediction of the hazard range of oil fires on the water surface.

The invention provides a method and a device for calculating a dirt behavior under the influence of zinc injection, and a readable medium. The fouling behavior calculation method comprises the following steps: carrying out node division on a reactor coolant system; the mass evaporation rate of each node and the corrosion product release rate after zinc injection are calculated; and inputting the corrosion product release rate after zinc injection and the mass evaporation rate into a mass transmission and mass balance model, and calculating to obtain the dirt mass of each node after zinc injection. According to the method, the corrosion product release rate after zinc injection is calculated based on the influence mechanism of zinc injection on corrosion product release, and parameters such as the dirt mass and the reactor core boron deposition mass of each part of the reactor core under the influence of zinc injection are calculated based on the corrosion product release rate after zinc injection, mass transmission and a mass balance model; the method can be used for judging the risk of axial power offset (CIPS) caused by dirt and local cladding corrosion (CILC) caused by dirt.

The application relates to the technical field of air purification, and discloses a negative ion purifier ion yield drift self-calibration control method and system, which comprises the following steps: obtaining the cumulative running time of an air pump to determine a mechanical fatigue reference drift amount; constructing a theoretical evaporation model to solve a theoretical water evaporation rate and a theoretical conductivity reference slope; comparing the actual conductivity change slope to obtain a deviation index, on the basis of which water quality state binary determination is performed, and a water quality damping drift amount is generated; superimposing the mechanical fatigue reference drift amount and the water quality damping drift amount to obtain a total performance drift amount, generating a target driving instruction, and performing clamping output in combination with a running envelope; the application effectively eliminates the conductivity false high interference caused by natural evaporation through a thermodynamic model, realizes layered and accurate compensation of hardware aging and water pollution, maintains the constant ion yield, and avoids the overcompensation and air pump dry burning risk caused by misjudgment.

The invention belongs to the technical field of evaporation source control in a material preparation process, particularly relates to a method for regulating and controlling the evaporation rate of an antimony source by controlling parameters of an evaporation pipe, and aims to solve the problems that in the existing traditional antimony source evaporation process, factors influencing the evaporation rate are insufficiently controlled, precise regulation and control cannot be realized, and the evaporation rate is not influenced in the evaporation process. In order to solve the problems that the evaporation rate is difficult to stabilize in a specific numerical range and large fluctuation is presented due to the fact that antimony contents in different areas of an image intensifier are different due to non-uniform distribution of an antimony source in an evaporation space, the following scheme is provided: the method comprises the following steps: S1, selecting an evaporation pipe, and controlling the size precision of the evaporation pipe; according to the antimony source evaporation pipe manufacturing method, fine regulation and control over the evaporation process are achieved by controlling the structure and the manufacturing technology of the antimony source evaporation pipe, the evaporation rate can be precisely regulated and controlled, the evaporation uniformity and stability are effectively improved, and the stability and repeatability of the technology are enhanced.

The present invention belongs to the technical field of dynamics of groundwater in an aeration zone. Disclosed is a method for calculating a bound water vapor diffusion coefficient of a glass sand porous medium. In the method, for a bound water vapor diffusion process of a glass sand porous medium, a functional relationship of a bound water vapor diffusion coefficient with regard to a bound water evaporation rate and a bound water evaporation equivalent area is established, and then the bound water vapor diffusion coefficient is calculated. By using the method, dynamic changes in the bound water vapor diffusion coefficient during a water evaporation process of the glass sand porous medium can be calculated. The method for calculating a bound water vapor diffusion coefficient of a glass sand porous medium provided in the present invention can rapidly acquire a bound water vapor diffusion coefficient with high precision and high reliability.

The present application provides a system and method for measuring cesium evaporation rate in a fusion device offline, comprising a vacuum chamber, a cesium crucible assembly, a heating assembly, a film thickness gauge, a laser absorption spectroscopy system and a vacuum pumping unit. The present application uses the vacuum pumping unit to provide an ultra-high vacuum environment for the whole device including the vacuum chamber; then uses the heating assembly to heat the cesium crucible and the transmission pipeline to ensure the effective evaporation of cesium and reduce the deposition of cesium on the pipeline wall; then uses the film thickness gauge and the laser absorption spectroscopy system to measure the deposition thickness of cesium and the concentration of cesium atoms, and cross-check the measurement results of the two diagnostic methods; realize the measurement of cesium evaporation rate and obtain the quantitative relationship between the cesium evaporation rate and the heating temperature; finally transplant the measurement system to the negative ion source to realize the real-time monitoring of the cesium injection amount in the vacuum stage. The present application provides effective data and technical support for cesium flow control in the magnetic confinement nuclear fusion negative neutral beam injection system.

The present application relates to the technical field of heat dissipation. Disclosed are a wick, a vapor chamber and an electronic device. By means of lap joint coupling of different capillary structures, the wick can integrate the advantages of the different capillary structures, for example, a first capillary structure and a third capillary structure have a stronger capillary force, so as to meet the requirement for a liquid return rate. A second capillary structure has a higher porosity, so as to meet the requirement for an evaporation rate. Therefore, the wick can achieve a design with an optimal capillary force, the minimum liquid flow resistance and the minimum vapor flow resistance, such that a vapor chamber achieves optimal performance, thereby meeting the heat dissipation requirement of an electronic device.

The invention relates to the technical field of water resource management, and discloses a canyon type reservoir water surface evaporation rate determination method, device and equipment and a medium, and the method comprises the steps: obtaining basic data of adjacent stations of a target area in each time period, and calculating the water temperature difference of the corresponding time period based on the basic data; classifying the basic data of each time period by using positive and negative values of the water temperature difference to obtain data sample sets corresponding to different types, and determining initial water surface evaporation rate calculation models corresponding to the different types; key parameters of the initial water surface evaporation rate calculation model are optimized according to the target constraint with the minimum energy closing error absolute value, and a target water surface evaporation rate calculation model is obtained; and inputting the data sample sets corresponding to different types into the target water surface evaporation rate calculation model to obtain the water surface evaporation rate. The method solves the problem that the calculation precision of the canyon-type reservoir water surface evaporation rate is insufficient due to the fact that the positive and negative water temperature difference and the local circulation influence are not distinguished in the prior art.

The invention belongs to the technical field of industrial automatic control, and particularly relates to a particle swarm optimization-based multi-element spraying fluidized bed composite coating PID control method, which comprises the following steps of: S1, acquiring operating parameters of fluidized bed equipment and actually measured material temperature with a hysteresis characteristic, and constructing a state space model through an extended Kalman filtering algorithm, deducing and outputting non-lagging real material temperature and transient evaporation rate; s2, according to the real material temperature and the transient evaporation rate, in combination with the physical characteristics of the coating material, the evaporation lag coefficient and the transient thermal shock strength of the material are obtained through calculation; and S3, calculating a comprehensive dynamic penalty weight in parallel by using the material evaporation lag coefficient and the transient thermal shock strength, and reconstructing a target fitness function of the particle swarm algorithm by using the comprehensive dynamic penalty weight. According to the invention, thermal inertia lag of the temperature sensor is effectively overcome, and control decoupling and self-adaptive matching of multi-material characteristics are realized.

The invention relates to the technical field of air purification, and discloses a negative ion purifier ion yield drift self-calibration control method and system, and the method comprises the steps: obtaining the accumulated operation time of an air pump to determine a mechanical fatigue reference drift amount; constructing a theoretical evaporation model to solve a theoretical moisture evaporation rate and a theoretical conductivity reference slope, comparing the theoretical moisture evaporation rate and the theoretical conductivity reference slope with an actual conductivity change slope to obtain a deviation index, executing water quality state binary judgment according to the deviation index, and generating a water quality damping drift amount; superposing the mechanical fatigue reference drift distance and the water quality damping drift distance to obtain a total performance drift distance, generating a target driving instruction, and combining the target driving instruction with the operation envelope to execute clamping output; according to the method, conductivity virtual high interference caused by natural evaporation is effectively eliminated through the thermodynamic model, layered accurate compensation of hardware aging and water quality pollution is achieved, and the risk of excessive compensation and air pump dry burning caused by misjudgment is avoided while the constant ion yield is maintained.

This invention discloses a method and system for predicting heat leakage and detecting pressure rise characteristics of a liquid hydrogen container. The method involves establishing a three-dimensional thermal flow field model of the liquid hydrogen container; calculating the heat flux density at the gas-liquid interface based on the three-dimensional thermal flow field model to adjust the liquid hydrogen evaporation rate; obtaining the total heat leakage through finite element simulation and experimental data co-calibration; calculating the static evaporation rate based on the total heat leakage; establishing a nonlinear mapping model between the static evaporation rate and the pressure rise rate using response surface regression; monitoring the wall temperature distribution of the liquid hydrogen container in real time; calibrating the thermophysical parameters using a dynamic calibration algorithm via an LSTM neural network; and correcting the output results of the three-dimensional thermal flow field model. By establishing a three-dimensional thermal flow field model of the liquid hydrogen container, the nonlinear response relationship between the evaporation rate and the pressure rise rate of the liquid hydrogen container is clarified, and a cloud-edge collaborative detection system is constructed to accurately predict the heat leakage performance of the liquid hydrogen container and achieve efficient pressure rise rate detection.

The present invention provides a rapid detection method for the static evaporation rate of cryogenic adiabatic cylinders. Using the principle of reverse heat conduction, after emptying the cylinder to be tested, a heating device is inserted into the bottom of the inner liner and heated to a preset high-temperature constant value, which is lower than the vacuum baking temperature during the manufacture of the cylinder; keep the temperature constant until the heat flow conducts through the vacuum interlayer to the surface of the outer shell; measure the equilibrium temperature of the outer shell surface, and look up the preset qualified threshold comparison table according to the current ambient temperature or calculate the qualified threshold using the interpolation formula; if the temperature of the outer shell surface is lower than or equal to the qualified threshold, the cylinder is determined to be qualified. The present invention shortens the traditional detection cycle of more than 72 hours to about 3 hours, without consuming liquid nitrogen, and solves the problem of misjudgment caused by environmental fluctuations through the environmental temperature compensation algorithm, with extremely high detection efficiency and accuracy.

The present invention provides a method, a computing device and a readable medium for calculating fouling behavior under the influence of zinc injection. The fouling behavior calculation method includes: dividing nodes of a reactor coolant system; calculating the mass evaporation rate of each node and the corrosion product release rate after zinc injection; inputting the corrosion product release rate after zinc injection and the mass evaporation rate into a mass transfer and mass balance model to calculate the fouling mass after zinc injection for each node. Based on the influence mechanism of zinc injection on the release of corrosion products, the present invention calculates the corrosion product release rate after zinc injection, and calculates parameters such as the fouling mass of each part of the reactor core and the boron deposition mass in the reactor core under the influence of zinc injection based on the corrosion product release rate after zinc injection, mass transfer and mass balance model, which can be used to judge the risk of axial power shift caused by fouling (CIPS) and local cladding corrosion caused by fouling (CILC).

The invention relates to the technical field of low-temperature storage tanks, in particular to an evaporation rate dynamic monitoring method and system for a standing low-temperature storage tank, and the method comprises the steps: obtaining monitoring data under different liquid levels in the low-temperature storage tank, air flow velocity data, air pressure data and liquid level height monitoring data at different sampling positions are acquired; analyzing the monitoring data, determining the steam diffusivity under different liquid levels, and determining the influence factors of the airflow disturbance on the evaporation rate under different liquid levels by combining the change conditions of the liquid level data under different liquid levels; and correcting the initial estimated evaporation rate under different liquid level heights based on the influence factor of the airflow disturbance on the evaporation rate. According to the method, the initial estimated evaporation rate is corrected by analyzing the influence of airflow disturbance on the evaporation rate under different liquid level heights, and the accuracy of dynamic monitoring of the evaporation rate of the low-temperature storage tank is effectively improved.

The present application relates to the field of clothing processing, and more specifically, to a drying control method for a clothing processing device and a clothing processing device, wherein the method comprises obtaining the difference between the evaporation rate and the condensation rate in response to a temperature difference exceeding standard signal, wherein the temperature difference exceeding standard signal is triggered by the temperature difference between the first temperature of the first vent and the second temperature of the fan inlet, and the difference between the evaporation rate and the condensation rate is characterized by the temperature change of the first vent; and adjusting the condensation capacity and / or heating capacity according to the difference between the evaporation rate and the condensation rate. According to the difference between the evaporation rate and the condensation rate, it can be determined whether the evaporation rate is greater than the condensation rate or the condensation rate is greater than the evaporation rate, and then adjusting the condensation capacity and / or heating capacity according to the specific situation. This makes the condensation rate and the evaporation rate tend to be equal. When the condensation rate is equal to the evaporation rate, the drying efficiency reaches the maximum, thereby improving the drying efficiency.

The invention discloses a method for measuring the evaporation rate of an exposed deck fuel cabin under complex full working conditions, which comprises the following steps: when the fuel cabin is in a full working condition state, respectively collecting the state data of the fuel cabin at the beginning of measurement and at the end of measurement through a sensor; according to the state data of the fuel cabin, an LNG liquid phase density value, a gasification latent heat value and an LNG steam specific heat value are calculated through an empirical formula; according to the fuel cabin state data and the LNG liquid phase density value, the evaporation gas flow is calculated; the evaporation rate is calculated and measured according to the fuel cabin state data, the evaporation gas flow and the LNG liquid phase density value; according to the boil-off gas flow, the gasification latent heat value and the LNG steam specific heat value, calculating through an energy conservation rule to obtain standard boil-off gas flow; and the measured evaporation rate is subjected to standardized correction through the standard evaporation gas flow and the LNG standard state data, and the standard evaporation rate of the full-working-condition fuel cabin is obtained. According to the method, the evaporation rate of the exposed deck fuel cabin can be accurately measured under complex full working conditions.

The present disclosure relates to a system for testing an atomization core (1), wherein the system comprises: a liquid supply device (2) configured to supply a liquid to an atomization core (1) via absorption; a power supply (3) configured to energise the atomization core (1) to evaporate liquid supplied to the atomization core (1); at least one sensor (4) configured to weigh the atomization core (1); and a control module (5) configured to receive a signal from the or each sensor (4) to determine an absorption rate of the atomization core (1) based on a determined rate of weight change of the atomization core (1) during the supply of liquid thereto. The control module (5) determines an evaporation rate of the atomization core (1) based on a determined rate of weight change of the atomization core (1) during energisation of the atomization core (1). The control module (5) compares the absorption rate and the evaporation rate to determine if a predetermined comparison requirement is met.

This invention discloses an intelligent detection system for the static evaporation rate of welded insulated gas cylinders based on the weighing method, belonging to the field of gas cylinder inspection technology. This invention effectively overcomes the core defects of traditional static evaporation rate detection, such as strong reliance on manual labor, susceptibility to data interference, and low reliability of results, by constructing an intelligent detection mechanism that integrates multi-dimensional feature extraction, dynamic threshold determination, and state evolution analysis. Addressing the inefficiency and operational errors caused by manual data recording, this invention achieves simultaneous automatic acquisition of mass, ambient temperature, and atmospheric pressure data. Based on the parameters of the inspected gas cylinder and the selected high-quality data, it automatically calculates the static evaporation rate and generates an inspection report, significantly reducing human intervention and improving detection efficiency and process traceability.

The application discloses a single-droplet evaporation and heat transfer rate measuring device and method, and relates to the technical field of micro-nanoparticle measurement. The device comprises an environment bin for generating a temperature and humidity environment meeting preset conditions; an aerosol droplet generating assembly for conveying a particle size aerosol airflow to the environment bin; a laser emitting assembly for respectively emitting first laser and second laser to the environment bin, so that the first laser and the second laser converge in the environment bin and generate an optical trap; the optical trap captures droplet particles so that the droplet particles are in a suspended state in the environment bin; a droplet evaporation observation assembly for observing particle size and droplet internal temperature distribution data of the droplet particles in the environment bin at different time points; and an evaporation rate and heat transfer efficiency calculating component for calculating the evaporation rate of the droplet particles according to the multiple particle sizes, and calculating the heat transfer efficiency of the droplet particles according to the multiple droplet internal temperature distribution data. The application realizes accurate measurement and calculation of the single-droplet evaporation rate and heat transfer efficiency.

The invention relates to the technical field of coal mine safety, and provides a coal spontaneous combustion behavior evolution method and system under multi-physics field coupling. According to the method, the volume of a temperature field during spontaneous combustion of a coal body is changed by influencing deformation, the porosity of the coal body is calculated through the volume, and then thermal deformation is driven; the thermal deformation affects moisture diffusion through porosity, residual moisture saturation of the coal body and liquid phase saturation, and then moisture migration is driven by combining the evaporation rate and the liquid phase saturation; moisture migration is combined with the evaporation rate, the effective heat conductivity coefficient and the coal oxidation reaction rate to drive heat transfer, heat transfer-thermal deformation-moisture-heat transfer circulation is formed, a heat-force-water-heat coupling closed loop during spontaneous combustion of the coal body is achieved, bidirectional coupling of a seepage field, a temperature field and a mechanical field is achieved, and the self-ignition performance of the coal body is improved. The problem of prediction misalignment caused by neglecting thermodynamic deformation and pore dynamic change of a traditional model is effectively solved.