51 results about "Evaporation rate" patented technology

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 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 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 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 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 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.

The invention provides a low-temperature storage tank evaporation rate testing system and a testing method thereof. The low-temperature storage tank evaporation rate testing system comprises a liquid outlet pipeline, a temperature returning device, an exhaust pipeline, a testing pipeline, a first valve, an emptying pipeline and a testing assembly. One end of the liquid outlet pipeline is communicated with the low-temperature storage tank; the temperature returner is communicated with the other end of the liquid outlet pipeline; one end of the exhaust pipeline is communicated with the temperature returning device; one end of the test pipeline is communicated with the temperature return device, and the test pipeline and the exhaust pipeline are arranged in parallel; the first valve is communicated with the test pipeline; one end of the emptying pipeline is communicated with one end of the test pipeline and the exhaust pipeline far away from the temperature recuperator, and the other end is provided with an emptying port; the test assembly is used for detecting the state information of the gaseous medium in the test pipeline. According to the low-temperature storage tank evaporation rate testing system, the exhaust pipeline connected with the testing pipeline in parallel is arranged, so that air flow sequentially passes through the testing pipeline and the emptying pipeline instead of the testing pipeline when the low-temperature storage tank is emptied, and the phenomenon that the precision is reduced and even the low-temperature storage tank is damaged due to over-travel operation of a measuring instrument communicated with the testing pipeline is avoided.

The embodiment of the invention provides a method and a device for automatically monitoring the state of a liquid nitrogen tank. The method includes measuring a weight of the liquid nitrogen tank at a first time period and storing the measured weight data; in a second time period, all weight data in the second time period are read to serve as a weight data sequence, the weight data sequence is preprocessed, and the working state of the liquid nitrogen tank in the second time period is automatically determined according to the preprocessed weight data sequence; and determining a time period when the working state is a stable state in the third time period, and calculating the evaporation rate of the liquid nitrogen in the liquid nitrogen tank based on the weight variation in at least one part of the time period of the stable state. The method does not need to manually calibrate the operation time period, and guarantees the continuity and real-time performance of the monitoring process.

The invention relates to the technical field of humidification, and discloses an evaporation capacity control method for a humidification device, which comprises the following steps: acquiring a target evaporation capacity of the humidification device; determining a first parameter and a second parameter associated with the target evaporation capacity; and controlling the value of the second parameter according to the value of the first parameter and the target evaporation capacity. In the application, the second parameter can be controlled according to the target evaporation capacity and the first parameter, accurate humidity control is performed on the environment where the humidifying device is located, and the user experience is improved. The invention further discloses an evaporation capacity control device for the humidifying device and the humidifying device.

The application provides a method for accurately analyzing and measuring the evaporation rate of liquid drops by using a contact angle measuring instrument and image software, which comprises the following steps: firstly, a calculation formula of the volume of an ellipsoid is established by investigating the relationship between the volume of the ellipsoid and the vertical sectional area and the width-height ratio of the ellipsoid; then, the volume pixel value of a single liquid drop with a fixed volume of a series of the liquid to be measured is measured and calculated by using the contact angle measuring instrument and the PHOTOSHOP software, and a regression relationship equation between the volume pixel value and the physical volume value of the single liquid drop is established; further, the volume pixel value of the single liquid drop of the liquid to be measured at different time points within 1 minute is measured, and the physical volume is calculated according to the regression relationship equation between the volume pixel value and the physical volume value; finally, the evaporation rate of the liquid to be measured is calculated by establishing a linear regression equation between the physical volume of the single liquid drop of the liquid to be measured and time.

The application provides a simple evaporation system for quickly measuring unsaturated soil hydraulic parameters, comprising a weighing sensor, a sample preparation cylinder outer cylinder, a soil sample, a base plate, a first tension meter, a second tension meter, a third tension meter, a wireless transmission collector, a power transmission module, a power reception module, a transparent organic glass box and an evaporation control system. The application provides a simple evaporation system for quickly measuring unsaturated soil hydraulic parameters, which can accurately determine the initial saturated state of the bottom of the sample by relying on the measurement value of the bottom tension meter, and can reduce the measurement calculation error by comparing the measurement values of the bottom tension meter and the other two height tension meters; the temperature and humidity control system is adopted to accurately and actively control the evaporation rate of the sample surface; the special glue liquid is used to connect between the soil sample and the sample preparation cylinder, and under the strong cementation effect, the soil sample can not be separated from the sample preparation cylinder during evaporation in the hot environment, thereby keeping the uniformity of the overall structure of the soil sample during the whole test process.

The invention discloses a method for measuring the evaporation rate of a fuel cabin at a deck and an enclosure place, which comprises the following steps: when the fuel cabin is in a stable working condition state, respectively collecting the state data of the fuel cabin at the beginning and the end of measurement through a sensor; inquiring a material attribute manual according to the fuel cabin state data to obtain an LNG liquid phase density value and a gasification latent heat value; the evaporation gas flow is calculated according to the fuel cabin state data and the LNG liquid phase density value; 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; the measured evaporation rate is subjected to standardized correction through the LNG standard state, and the standard evaporation rate of the exposed deck fuel cabin under the stable working condition is obtained; and the measured evaporation rate is subjected to standardized correction by combining the LNG standard state with the temperature data of the enclosure place, and the standard evaporation rate of the fuel cabin of the enclosure place under the stable working condition is obtained. The method can adapt to the evaporation rate measurement of the deck fuel cabins in different arrangement forms, and the accuracy and universality of the measurement result are effectively improved.

The application discloses a kind of high temperature gas cooled reactor liquid nitrogen daily evaporation rate test method and device, belong to high temperature gas cooled reactor nuclear safety guarantee technical field.First, the multi-stage valve isolation is executed to liquid nitrogen supply and storage system, and the isolation reliability is guaranteed by double confirmation mechanism of system state and mechanical locking;Subsequently, the vacuum degree of interlayer of storage tank is detected using nuclear level calibrated vacuum gauge, and repair is carried out if it does not satisfy preset threshold;When filling liquid nitrogen, intermittent injection is carried out using nuclear level cryogenic stainless steel hose, and bottom liquid discharge valve purging is matched, until the purity of exhaust gas reaches standard after filling to target liquid level;Finally, after the specified reference standing period containing eliminating initial gasification disturbance, daily evaporation rate is calculated according to liquid level change and geometric parameter model.The present application ensures the rigor of test and the repeatability of result through standardized process and multiple verification.

The invention belongs to the field of liquid hydrogen storage and transportation, and discloses a liquid hydrogen storage tank daily evaporation rate substitution test equivalent method and a related device. Static pressure distribution, gas-liquid two-phase heat and mass transfer data and wall surface temperature are calculated based on the fluid statics and mass energy conservation law; iterative simulation is carried out under the dual termination conditions that the gas phase temperature deviation is smaller than a threshold value and the total duration reaches the standard, and the simulated daily evaporation rate of the liquid nitrogen and the liquid hydrogen is output; an evaporation conversion coefficient is obtained through the ratio of the two values, and finally the actually measured liquid nitrogen evaporation rate is converted into a liquid hydrogen equivalent value. By the adoption of the method, the safety risk and the cost bottleneck of liquid hydrogen testing are avoided, errors caused by boiling point difference, thermal stratification and conversion coefficient distortion in a traditional liquid nitrogen substitution method are overcome, and safe, accurate, efficient and large-scale substitution testing of the static evaporation rate of the liquid hydrogen storage tank is achieved.