245 results about "Fluid temperature" patented technology

The invention provides a temperature measurement system and compensation method of non-direct contact fluid, and relates to the technical field of temperature detection. The temperature measurement system comprises a dynamic compensation module, a steady-state deviation compensation module and a steady-state judgment module, the temperature sensor collects the temperature value of fluid which is not in direct contact with the temperature sensor, and the temperature value is subjected to hysteresis compensation through the dynamic compensation module. The steady state judgment module judges whether the temperature is in a steady state or not according to the temperature value subjected to hysteresis compensation, and if not, the temperature value subjected to hysteresis compensation is output; if yes, a steady-state deviation compensation module carries out steady-state deviation compensation on the temperature value after hysteresis compensation and then outputs the temperature value. The temperature measurement system can effectively improve the accuracy and response characteristics of non-contact fluid temperature measurement by combining dual mechanisms of dynamic compensation and steady-state deviation compensation.

The invention provides a well-station-oil depot coupling simulation-based crude oil coagulation risk optimization method, which comprises the following steps of: firstly, designing a well-station-oil depot pipe network system topological structure, analyzing a pipe network structure, and numbering wells, stations, oil depots and pipelines to obtain the numbers of an upstream pipeline and a downstream pipeline of each pipeline; then, a well-station-oil depot pipe network system is disassembled into a node + pipeline form, each pipeline is dispersed into a plurality of calculation units, and the pipe section length, diameter and dip angle of each calculation unit are obtained; according to the fluid temperature of each wellhead, the fluid entering pressure of each station and a PVT physical property table, assuming the temperature and pressure of all nodes to obtain the average temperature and pressure of each pipe section; and calculating crude oil physical property parameters, crude oil flow parameters, pressure drop and temperature drop parameters of each pipe section by adopting an iterative method to obtain pressure and temperature of all nodes, and finally judging the pipe condensation risk according to the physical property parameters and the pipeline pressure and temperature. The pipe condensation risk can be automatically judged, and the production efficiency and safety are improved.

The invention discloses a fluid temperature and pressure partitioning and heat transfer prediction method under supercritical pressure, which comprises the following steps: firstly, constructing a dimensionless criterion SEN to quantitatively evaluate a fluid expansion effect, and then dividing heat transfer into a plurality of temperature and pressure intervals based on Nuexp / Nufc; for each partition and the constructed dimensionless criterion, a temperature interval of a dominant mechanism and characteristic parameters representing the dominant mechanism are extracted, and particularly, the reasonability of a single-phase fluid hypothesis and a two-phase fluid hypothesis can be rapidly judged through the constructed dimensionless criterion; and establishing a partition prediction model by adopting a mechanism and data dual-drive framework. And finally, calling the corresponding sub-model according to the working condition and processing the cross-region continuity to realize high-precision heat transfer prediction in the full working condition range. The method solves the problem that a traditional method is difficult to predict full-temperature pressure interval heat transfer at high precision, and can be used for precise thermal design of the supercritical working medium in thermal equipment such as boilers, heat regenerators and coolers.

The invention belongs to the technical field of industrial automation control, and relates to a seasoning filling PID parameter adaptive optimization control method and system. The method comprises the steps that the real-time temperature of fluid in a filling pipeline, the static pressure of a valve inlet, the instantaneous flow and a valve opening instruction are collected, and moving average filtering preprocessing is carried out; constructing a self-adaptive forgetting factor calculation model based on the viscosity-temperature characteristics, and calculating a current optimal forgetting factor according to the fluid temperature change rate, the flow prediction error and the fluctuation condition of the flow data; a recursive algorithm is used for identifying the system process gain online, and the proportional gain of a PID controller is calculated in real time according to the identified process gain and the ratio of the hydrostatic pressure to the standard reference pressure; and the gain is input into a controller, and a final valve opening instruction is generated in combination with integral and differential terms. According to the method, the dynamic adjustment of the algorithm memory length can be realized, the viscosity change can be quickly adapted, excessive filling and slow response are eliminated, and high-precision filling under complex working conditions is ensured.

According to the flow control system and method for the filter element flow resistance performance test provided by the invention, the self-adaptive PID control closed loop taking the real-time flow resistance coefficient as the core feedback quantity is constructed, and the high-precision sensing network and the intelligent decision algorithm are integrated; the defect that traditional manual or simple PID control is difficult to adapt to filter element characteristic change and environmental interference is successfully overcome; specifically, the system dynamically collects flow, pressure difference and temperature signals and calculates the flow resistance coefficient of a filter element in real time, PID control parameters (proportion, integration and differential terms) are adjusted in a self-adaptive mode according to the flow resistance coefficient, meanwhile, the reference value of a sensor is periodically calibrated so as to eliminate drift errors, and an electric control valve is driven to rapidly and accurately respond; according to the method, the dynamic stability and static precision of flow control are remarkably improved, multi-source interference such as pipeline pressure pulsation and fluid temperature change is effectively compensated, the steady-state error of the test flow is greatly reduced, and finally the efficient and high-precision automatic test of the flow resistance performance of the filter element is achieved.

The application discloses a kind of in-pipe fluid temperature measurement method, system, electronic equipment and storage medium, it is related to in-pipe temperature measurement technical field, the method comprises: determining the fixed parameter of target to be measured, the flow rate of fluid, noise variance and observation variance;Fixed parameter includes pipe wall thickness, pipe wall material thermal conductivity, fluid convection heat transfer coefficient and air convection heat transfer coefficient;According to the optimal in-pipe temperature of last time and the flow rate of fluid, determine the predicted temperature of current time;According to the optimal covariance of last time and noise variance, determine the covariance of current time;The optimal covariance of last time is determined according to the weight coefficient of last time, covariance, fixed parameter and observation variance;According to the weight coefficient of current time, determine the covariance of current time, fixed parameter and observation variance;According to the predicted temperature of current time, weight coefficient, outer wall temperature, air temperature, fixed parameter and observation variance, determine the optimal in-pipe temperature of current time.The application expands the use range of in-pipe temperature measurement.

The invention provides an aluminum alloy precision forging forming die multi-area independent temperature control system and method, the system comprises a forming die assembly, a force thermal decoupling support base, a fluid temperature control supply station and a main control unit, the forming die assembly comprises a plurality of heat conduction inserts separated by heat insulation isolation layers; a rigid bearing loop and a dynamic thermal control loop which are parallel to each other are integrated on the force thermal decoupling supporting base, the dynamic thermal control loop drives the high-thermal-conductivity telescopic thermal bridge and the interface flexible dielectric layer to ascend and descend through a displacement actuator, and in a non-forging state, the thermal bridge supports the heat conduction insert and maintains a safety gap with the rigid bearing stand column; in the forging impact stage, the heat conduction insert moves downwards to eliminate the safety gap, the rigid bearing stand column bears the forming load, the main control unit adjusts the output force of the actuator according to temperature feedback, and the contact thermal resistance is adjusted and controlled in real time by changing the interface contact pressure. The problem that a precise temperature control assembly is difficult to bear forging impact is solved, and quick and precise response of multi-area independent heat flow is achieved.

A hydraulic system (12) for an aircraft (10), wherein the hydraulic system (12) includes a hydraulic power pack (14), a hydraulic fluid reservoir (28) and a hydraulic pump (30), a hydraulic consumer (18), a high-pressure supply line (38) supplying the hydraulic consumer (18) with hydraulic fluid under higher pressure, and a low-pressure return line (40) returning hydraulic fluid under lower pressure from the hydraulic consumer (18); heating device (42) with a short-cut line (44) connecting the high-pressure supply line (38) with the low-pressure return line (40) and a heater valve (46) for opening and closing the short-cut line (44), and a control and monitoring unit (43). Temperature management includes automatically controlling a fluid temperature by monitoring the fluid temperature and controlling the heater valve (46).

A cooling system includes one or more cooling panels for affecting a cooling load in an environment. The cooling system also includes a heat exchanger coupled to the one or more cooling panels. Each cooling panel includes a film, a panel body, an inlet port, an outlet port, and a fluid path. The film's radiative properties allow it to achieve a temperature less than an environment temperature. The heat exchanger includes ports that are coupled to the fluid paths of the one or more cooling panels. A control system is used to control flow rates, flow paths, fluid temperatures, component temperatures, cooling rates, component operation, or other aspects of a cooling system. For example, the control system controls or monitors pumps, compressors, fans, valves, sensors, actuators, or a combination thereof.

The invention relates to the technical field of crossing of mechanical engineering and thermodynamics, in particular to novel intermittent piston equipment. The device is characterized by comprising a gas-liquid cylinder system, a piston system, a feeding system, a discharging system and a cooling system, wherein the gas-liquid cylinder system comprises a plurality of partition plates with holes and can further comprise a plurality of monitoring control assemblies, and the piston system comprises a plurality of piston push plates with holes and a plurality of piston driving mechanisms and can further comprise a plurality of monitoring control assemblies. The cooling system comprises a plurality of thermal contact modules, a plurality of heat transfer modules and a plurality of heat dissipation terminals, and can further comprise a plurality of monitoring control assemblies. A perforated partition plate, a perforated piston push plate and a monitoring control assembly are additionally arranged in an existing piston equipment technology, meanwhile, piston pushing and cooling system cooling integrated intermittent operation is adopted, the position of a piston and fluid pressure are monitored in real time, a driving signal is dynamically adjusted, and the working efficiency is improved. Efficient conversion between mechanical energy and gas pressure energy, hydraulic energy or fluid heat energy and precise control over the fluid temperature are achieved, the compression, expansion and mass transfer and heat transfer efficiency of fluid in equipment is greatly improved, the technical application scene is wide, and the technical application value is high.

This invention provides a permanent antistatic PC material preparation system, comprising a mixing unit, an extrusion granulation unit, and an injection molding unit connected in sequence. The injection molding unit includes a barrel, a screw assembly rotatably disposed within the barrel, and an ERT sensor disposed at a nozzle at the end of the barrel. The ERT sensor includes an electrode array for online acquisition of electrical impedance tomography (EIT) data of the melt passing through the nozzle. The screw assembly includes a screw spindle with a longitudinally penetrating internal heat conduction oil channel. This internal heat conduction oil channel is connected to an external temperature control system via a connector. One section of the barrel is a compression section. A segmented thermal response sleeve is fitted around the outer periphery of the screw spindle within the compression section. The outer surface of the thermal response sleeve is provided with an outer peripheral conveying spiral. The thermal response sleeve responds to changes in the fluid temperature within the internal heat conduction oil channel by generating radial expansion displacement, thereby dynamically adjusting the compression ratio by changing the effective root diameter of the screw assembly within the compression section.

The application relates to the field of temperature control valves, and provides a temperature control valve system which comprises a first three-way valve, a second three-way valve, a temperature sensor, a delivery pump and a control terminal, forms multiple different circuits, utilizes the temperature sensor to monitor the fluid temperature in a first pipeline in real time, utilizes the control terminal to control the opening and closing and opening degree of each valve according to the data monitored by the temperature sensor, and timely reduces or increases the temperature, and improves the response speed. The application also provides an air wave therapeutic instrument provided with the temperature control valve system, which comprises a capsule body, the temperature control valve system and a cold water tank. The application has the effects that the temperature is adjusted by using the human body temperature of a user, the cost of the air wave therapeutic instrument is reduced, green environmental protection is realized, meanwhile, the temperature of the whole system is ensured to be not too high, and the effect of avoiding scalding is achieved.

The invention relates to a temperature control device (1) for temperature control of a fluid, comprising: at least one fluid supply (11), at least one fluid discharge (12), and at least one fluid transport element (13), wherein the fluid transport element (13) comprises a drive (131) and at least one fluid conveying element (132) connected to the drive (131), and the drive (131) moves the fluid conveying element (132) as required, wherein the fluid conveying element (132) is in contact with the fluid at least partially, and when the drive (131) is activated, the fluid conveying element (132) transports fluid from the fluid supply (11) to the fluid discharge (12). The fluid conveying element (132) comprises an elastocaloric material at least partially. The invention also relates to a vehicle with a temperature control device (1) and a method for temperature control of a fluid.

The present application relates to the field of seismic physical simulation experiment, and discloses a kind of seismic physical simulation experiment device and method, and the seismic physical simulation experiment device includes the closed chamber for containing reservoir model and filling fluid, the ultrasonic detection device for detecting reservoir model, the fluid control system for controlling the pressure of fluid and the temperature control system for controlling the temperature of fluid, and reservoir model is immersed in fluid.The present application seismic physical simulation experiment device places reservoir model in the fluid in closed chamber, adjusts the fluid pressure in closed chamber using fluid control system, adjusts the fluid temperature in closed chamber using temperature control system, so that the environment temperature and pressure where reservoir model is located are consistent with the real reservoir to be simulated;The data of reservoir model are comprehensively collected by ultrasonic detection device, so that experimental data closer to the simulated real reservoir can be obtained.

The invention discloses a temperature control adjusting method for an aluminum plate strip cleaning solution. The temperature control adjusting method comprises the following steps: S1, presetting a target temperature T0; s2, a first infusion pump and a second infusion pump are started, the cleaning liquid sequentially passes through the cleaning tank body, the first infusion pump, the circulating tank body, the second infusion pump, a flow control valve and a backflow device and then flows back to the cleaning tank body, and closed-loop circulation is formed; s3, the temperature T2 of the cleaning solution in the corresponding area of the temperature sensors corresponding to the backflow devices in a one-to-one mode is utilized, meanwhile, the moving speed V1 of the aluminum plate strip is obtained through a speed encoder of the aluminum plate strip conveying mechanism, and detection signals of the temperature sensors and the speed encoder are both transmitted to a main controller; and S4, the main controller dynamically adjusts the temperature T1 of the cleaning liquid in the circulating tank body and the opening degree X of the corresponding flow control valve according to the deviation between T2 and T0 and the real-time value of V1. The core area T2 of the cleaning tank is monitored in real time, double variables (T1, X) are cooperatively adjusted, it is ensured that T2 is stabilized at T0 + / -1 DEG C, and the high-precision cleaning requirement is met.

The invention relates to an offshore CCUS well building shaft temperature and pressure coupling calculation method which comprises the following steps: substituting an initial temperature and pressure profile of a shaft into a shaft drilling fluid density prediction model to obtain drilling fluid density, and substituting the initial temperature and pressure profile into a rheological property prediction model to obtain drilling fluid viscosity; fluid pressure in the drill stem and fluid pressure in the annulus are obtained; all nodes with shaft pressure prediction differences meeting the precision requirement are selected; the fluid temperature is updated through the temperature model and the fluid density of the node with the difference value meeting the precision requirement of the wellbore pressure prediction difference value of the node; according to the fluid with the updated temperature, adjacent nodes with the shaft pressure prediction difference meeting the precision requirement are selected; selecting nodes corresponding to all fluids of which the circulating flowing time in the shaft meets the preset time requirement from all nodes of which the shaft pressure prediction difference meets the precision requirement; and taking the temperature and the pressure of the node meeting the requirements as final wellbore temperature and pressure profiles.

The invention belongs to the technical field of water supply equipment, and particularly discloses a valve device and water supply equipment. A valve body assembly of the valve device is provided with a first port communicated with the hot water channel, a second port communicated with the cold water channel and a valve cavity communicated with the first port and the second port, and a communication port is formed in the valve cavity. The valve element assembly comprises a valve element capable of being axially and movably installed in the valve cavity, a blocking piece and a temperature adjusting piece, wherein the blocking piece and the temperature adjusting piece are both connected to the valve element. The blocking piece is used for opening or blocking the communicating opening. The temperature adjusting piece can change deformation force acting on the valve element according to the fluid temperature of the first port. When the fluid temperature is lower than the preset temperature, the fluid pressure of the first port can enable the valve element to overcome the deformation force so that the communication port can be communicated; when the fluid temperature is higher than the preset temperature, the blocking piece blocks the communicating opening. The valve device has the one-way conduction function and the temperature sensing function, the machining cost is reduced, no complex pipeline system exists, the cost is reduced, and the reliability of water supply equipment is improved.

The invention provides a ship pipeline inner wall fluid temperature inversion method and device and electronic equipment, and the method comprises the steps: obtaining an actual measurement value of the outer wall fluid temperature of a target point of a ship pipeline, determining a to-be-inverted single quantity parameter, and determining the basic data and boundary conditions of the ship pipeline; constructing a target function based on the measured value of the outer wall surface fluid temperature of the target point and the predicted value of the outer wall surface fluid temperature, and solving the target function by taking minimization of the target function as a target to obtain an optimal value of a to-be-inverted single quantity parameter; the predicted value of the outer wall surface fluid temperature of the target point is determined based on a to-be-inverted single quantity parameter, basic data and a boundary condition; and according to the optimal value of the to-be-inverted single quantity parameter, determining a predicted value of the inner wall surface fluid temperature of the target point. According to the method, the objective function is constructed and solved, so that the fluid temperature of the inner wall surface of the ship pipeline can be predicted, and the accuracy of temperature prediction is improved.

The invention provides an in-use heat exchanger energy efficiency evaluation method and system based on the first law of thermodynamics. The method comprises the following steps: acquiring volume flow, temperature and pressure of cold and hot fluid of a heat exchanger under an in-use working condition and pressure measuring hole ground clearance data; the total heat transfer coefficient, the cold fluid pressure drop and the hot fluid pressure drop of the heat exchanger under the working condition are calculated; stipulating the flow velocity and qualitative temperature of cold and hot fluid of the heat exchanger under a standard working condition; calculating the total heat transfer coefficient, the cold fluid pressure drop and the hot fluid pressure drop correction, and calculating the total heat transfer coefficient, the cold fluid pressure drop and the hot fluid pressure drop of the in-use heat exchanger under the standard working condition; the energy efficiency index value of the in-use heat exchanger under the standard working condition is calculated, and energy efficiency grades are divided. The total heat transfer coefficient correction and the pressure drop correction are introduced, and the influence of dirt in the heat exchanger on energy efficiency is fully considered. By specifying the standard working condition, the evaluation result is not affected by the fluid temperature and flow velocity, and the stability is good.

Disclosed are an apparatus, system, and method for providing at least one fluid temperature value of a fluid flowing through a pipe, as well as a vehicle equipped with the system. The present invention relates to an apparatus for providing at least one fluid temperature value of a fluid flowing through a pipe, the apparatus comprising an input, a processing device, and an output, the input configured to receive a first temperature signal providing at least one first temperature value from a first sensor in the pipe in contact with a first thermally conductive member extending to the fluid in the pipe, the first temperature signal providing at least one first temperature value, the output configured to provide an output signal including the at least one fluid temperature value, and the processing device configured to perform at least the following steps: receiving the first temperature signal from the input; determining the at least one fluid temperature value from the first temperature value using a second temperature value representing the temperature of the air surrounding the pipe; and providing an output signal including the at least one fluid temperature value. Thus, the present invention provides an apparatus for providing more accurate fluid temperature values.

The invention relates to a liquid-propellant rocket engine test assembly, in particular to a detachable plug-in temperature sensor mounting mouthpiece, and solves the technical problems that an existing temperature sensor mounting mouthpiece is poor in measurement accuracy, cannot be detached, wastes cost and is complex to mount, so that the simulation test efficiency is low. The detachable plug-in temperature sensor installation mouthpiece comprises a step joint, a spherical joint, a first mouthpiece installation cylinder and a second mouthpiece installation cylinder. The lower end of the step joint is connected with the upper end of the spherical joint; a first step hole matched with the plug-in temperature sensor in shape is formed in the step joint, and a first through hole matched with the plug-in temperature sensor in shape is formed in the spherical joint; the first through hole is communicated with the first stepped hole; the second mouthpiece mounting cylinder is used for fixing the plug-in temperature sensor in the step joint; the first mouthpiece mounting cylinder is used for fixing the lower end of the spherical joint inserted into the tee joint in the tee joint so as to measure the temperature of fluid in the tee joint.

There is provided a connector apparatus (10) suitable for use between a generator (55) and a turbine (57) comprising a gas input (16), a gas output (12), a tube defining a channel (24) therethrough between the gas input and gas output, the tube including a corrugated section (14) to allow for thermal expansion and contraction wherein at least a portion of the tube is formed from two layers of corrugated material. This invention also relates to a system (28) comprising at least the connector, the generator and the turbine. The invention aims to solve or mitigate the fact that said mechanical units are difficult to connect durably throughout lengthy periods of operation, as they may be subject to prolonged mechanical disturbances, such as vibrations and / or continued thermal disturbances, because the metallic components may experience cycles of potentially significant expansion and contraction due to periodic surface contact with extreme fluid temperature differentials.

The invention relates to a heat dissipation device which is provided with a first main channel, a second main channel and a first liquid outlet area arranged between the first main channel and the second main channel, and the first liquid outlet area is provided with a first branch channel communicating with the first main channel and a second branch channel communicating with the second main channel. The heat dissipation device is further provided with a liquid inlet and a liquid outlet which are communicated with the outside, the first main channel and the second main channel are communicated with the liquid inlet, and the first branch channel and the second branch channel are communicated with the liquid outlet. And the flow direction of fluid in the first branch channel is opposite to that of fluid in the second branch channel. According to the countercurrent layout, an original monotonically rising temperature curve is converted into mutually balanced bidirectional temperature distribution, the fluid temperature uniformity is improved, the surface temperature distribution of the chip in contact with the wall surface of the channel is more uniform, the overall flow resistance is reduced, the pressure drop is reduced, and the heat dissipation efficiency is improved.

This application discloses a method, apparatus, and storage medium for simulating vehicle motor temperature, belonging to the field of vehicle motor development technology. The method includes: acquiring a physical model and boundary conditions of the motor, wherein the physical model is a volume mesh model; determining a mathematical model based on the physical model of the motor; applying the boundary conditions and the mathematical model to the physical model of the motor to solve for the motor cooling flow field and the motor temperature field; wherein the solid wall temperature and near-wall fluid temperature in the heat transfer conservation equation between the fluid and solid in the mathematical model are real-time measured values. This method can simultaneously obtain the motor cooling flow field and the motor temperature field, simplifying the calculation process, shortening the acquisition time of the motor cooling flow field and the motor temperature field, and more accurately reflecting the motor temperature situation.

The invention provides a machine tool multi-heat source self-adjusting cooling flow device. The machine tool multi-heat source self-adjusting cooling flow device comprises a multi-loop connecting shell, a thermostat, a valve, a spring and a connecting rod. When the operation load of a heat source is increased, the temperature of cooling fluid rises, wax in the thermostat is forced to expand, the piston is pushed downwards, the piston pushes the valve to increase the flow, meanwhile, through a connecting rod mechanism, other valves with the relatively low temperature are closed, and the cooling flow of the valves is reduced; the valves are automatically adjusted according to the backflow temperature in different loops, openings of the valves can be automatically adjusted to be enlarged in loops with large heating, and valve openings of other loops with small heating are shrunk through a connecting rod mechanism. When the load is changed, the device can automatically adjust the flow according to the temperature change, and a high-price temperature control system is not needed, so that the cooling benefit is maximized. Through the action mode of the valve and the connecting rod seesaw, the size of the flow opening can be simply, easily and accurately controlled, and corresponding flows can be provided for different heat sources.

A process fluid temperature estimation system includes a mounting assembly configured to mount the process fluid temperature estimation system to an external surface of a process fluid conduit. A sensor capsule has at least one temperature sensitive element disposed therein and is configured to sense at least a temperature of the external surface of the process fluid conduit. Measurement circuitry is coupled to the sensor capsule and is configured to detect a characteristic of the at least one temperature sensitive element that varies with temperature and provide sensor capsule temperature information. A controller is coupled to the measurement circuitry and is configured to obtain a temperature measurement of the external surface of the process fluid conduit and to obtain a reference temperature and employ a heat transfer calculation with the reference temperature, the external surface temperature measurement and a known thermal relationship between the external surface temperature sensor in the sensor capsule and the reference temperature to generate an estimated process fluid temperature output. The controller is also configured to improve response time of the process fluid estimation system mathematically. In some examples, the controller is configured to extract the system tau value from the measured data.

This invention provides a method for determining the oil level of a compressor and an air conditioning system. The compressor has an oil sump, and a throttling element and a liquid temperature sensor are sequentially installed at the outlet of the oil sump. The liquid temperature sensor is used to measure the temperature Tk of the fluid flowing out of the oil sump after being throttled by the throttling element. The method includes: acquiring the compressor's high-pressure Ph, low-pressure Ps, discharge temperature Tp, and fluid temperature Tk; determining the compression ratio Px based on the high-pressure Ph and low-pressure Ps; calculating the predicted oil temperature Tkcal of the compressor based on the compression ratio Px, discharge temperature Tp, and low-pressure Ps; calculating the difference ΔT between the predicted oil temperature Tkcal and the fluid temperature Tk, and comparing the difference ΔT with preset dynamic parameters; and determining whether the compressor's oil level is qualified based on the comparison result of the difference ΔT and the dynamic parameters. The control method of this application is simple, convenient, reduces manual intervention, and has high accuracy.

A method for determining adulteration of a fluid under test is provided. The method comprises flowing the fluid under test through a sensor. A fluid temperature threshold is stored, and a temperature of the fluid under test deviating from the fluid temperature threshold is measured. An instance of fluid adulteration is determined.

The application discloses a spiral rod bundle multi-channel experimental device and an experimental method based on additive manufacturing, and relates to the technical field of experimental devices.The spiral rod in the experimental device is processed by using additive manufacturing technology, and the clamping piece structure on the outer surface of the spiral rod can ensure that the thermocouple accurately measures the wall surface temperature.The sub-channel temperature measuring assembly is arranged near the inlet and outlet of the experimental device, the fluid temperature of the typical sub-channel is measured, the sub-channel analysis program is combined, the mixing coefficient of the spiral rod bundle multi-channel can be obtained, the experimental data of different experimental conditions can be obtained by adjusting the flow of the experimental loop and the fluid temperature in the lower chamber, and the Darcy friction resistance coefficient of the spiral rod bundle multi-channel can be obtained by recording the indication of the differential pressure transmitter.The experimental data of the application can provide support for the development of the design program of the spiral type rod bundle nuclear fuel.

The present invention relates to the field of automotive thermal management simulation technology, and discloses a heat exchanger dual-fluid temperature simulation calculation method, device, vehicle, and medium. The method includes: simplifying the heat exchanger into a porous medium region, the porous medium region being a geometric structure adapted to the physical size of the heat exchanger; meshing the region where the heat exchanger is located to obtain a first mesh region containing the porous medium region and a second mesh region not containing the porous medium region; performing flow field simulation on the first mesh region and the second mesh region, and coupling solving the fluid temperature field of the first mesh region to obtain the dual-fluid temperature of the heat exchanger. After simplifying the heat exchanger into a porous medium region adapted to its physical size, the present invention divides each mesh region and performs flow field simulation and coupling solution, which can realize simulation calculation of the fluid temperature on both sides of the heat exchanger, not only shortening the calculation cycle, but also making the simulation results more accurately reflect the actual working state of the heat exchanger, greatly improving the simulation calculation accuracy.