87 results about "Operation temperature" patented technology

The invention relates to the technical field of coal washing equipment, in particular to a lifting type peripheral transmission rake thickener operation system for coal washing, which comprises a working condition sensing module used for collecting slime water concentration, rake frame torque, slag layer thickness and equipment operation temperature data; the intelligent decision-making module is used for constructing a slime water sedimentation prediction model through an LSTM-GRU hybrid algorithm according to the data, and generating an equipment operation regulation and control instruction; the lifting transmission regulation and control module is used for adjusting the vertical height of a rake frame according to a regulation and control instruction to adapt to different slag layer thickness treatment requirements, and meanwhile, combining real-time feedback of the torque of the rake frame, dynamically adjusting the rotating speed of a peripheral transmission motor and optimizing coal slime and water separation conditions; and the safety early warning module is used for monitoring parameter mutation through a sliding window algorithm, and triggering corresponding strategies of different levels when the harrow torque and the slime water concentration exceed multiple groups of adaptability thresholds. Therefore, the problems that in the prior art, the height of the rake frame is fixed, regulation and control depend on manpower, and an early warning mechanism is extensive are solved.

The utility model relates to a lubricating oil filter bypass sensor tester, which comprises a box body, an operation panel is arranged on the box body, a power supply, a test adapter, a temperature unit and a pressure unit are arranged in the box body, the operation panel is provided with a test interface, a temperature regulation panel and a pressure regulation knob, the temperature unit comprises a temperature platform, and the pressure unit comprises a gas source and a temperature platform. The test interface is arranged at the bottom of the box body, the test adapter is fixedly arranged above the test interface and is respectively connected with the power supply and the temperature regulation panel, the air source is fixed at the bottom of the box body and is respectively connected with the test adapter and the pressure regulation knob, and an input port of the test adapter is arranged in the test interface and is connected with a to-be-tested lubricating oil filter bypass sensor through the test interface; the temperature adjusting panel is used for setting the temperature of the temperature platform, the pressure adjusting knob is used for adjusting the output pressure of the air source, the output pressure is presented in the form of a portable function test box, the actual working temperature and the environment pressure of the sensor can be accurately simulated, and the test safety and accuracy are improved.

A method (200) for controlling the temperature of recirculated exhaust gas in an internal combustion engine, comprising: Operating (202) the internal combustion engine (10) in a baseline mode; Receiving (204) a signal indicating the operating temperature of a motor; (206) comparing the engine operating temperature with a predetermined IEGR threshold; if the engine operating temperature is lower than the predetermined IEGR threshold, (210) activating an IEGR mode in which internal exhaust gas recirculation is present, and activating an EEVO mode, which is an operating mode of the internal combustion engine in which exhaust valve timing is changed compared to an initial operating mode; and If the engine operating temperature is higher than the first preset IEGR threshold, the IEGR mode is deactivated and the EEVO mode is deactivated. wherein the baseline mode includes activating a primary exhaust valve opening during an exhaust event of the associated cylinder of the exhaust valve, wherein the IEGR modes include activating a secondary exhaust valve opening during an intake event of the associated cylinder of the exhaust valve and partially holding the exhaust valve (64) open between the primary exhaust valve opening and the secondary exhaust valve opening, wherein the exhaust valve (64) is fully open during the primary exhaust valve opening and the exhaust valve has less than 40% of its full opening during the secondary exhaust valve opening, including the EEVO modes: Activating the primary exhaust valve opening prior to the primary exhaust valve opening of the baseline; holding the exhaust valve fully open (64); and Closing the outlet valve (64) according to the baseline mode.

The utility model provides a temperature control system of a continuous hot press, which relates to the technical field of hot presses and comprises an oil tank, a heater, a heat exchanger, a pressure die end, an electric cabinet, a temperature sensor and a circulating pump. The first end of the circulating pump is connected with the heater, and the second end is connected with the pressure mold end; the temperature sensor is arranged between the circulating pump and the heater; the electric control box is electrically connected with the heater, the heat exchanger, the temperature sensor and the circulating pump. According to the utility model, rapid heating and cooling of the hot press can be realized; the stability of the working temperature of the hot press is good; the heat exchange efficiency is high; it is guaranteed that the system works under the safe pressure, and meanwhile the function of emergency pressure relief when equipment leaks and breaks down is achieved.

This invention provides a method, system, and nozzle for quantitative evaluation of the appearance of space engine nozzle coatings. The method includes: dividing the silicide coatings on the inner and outer surfaces of the nozzle into regions corresponding to different acceptance levels based on the operating temperature, thermal stress, and high-temperature gas erosion intensity of various parts of the nozzle; conducting full-area observation of the inner and outer wall coatings of the nozzle; identifying the regions where defects to be tested are located according to predefined zoning rules; comparing the observed defects with a pre-established standard defect map library to classify the defects; measuring the parameters of each defect based on the classified defects; comparing the measured defect parameters with the acceptance level corresponding to the region; and outputting a clear conclusion including whether the product is deliverable based on the comparison results. This invention provides an executable and quantifiable method for evaluating the appearance quality of coatings prepared by slurry sintering and embedding / infiltration methods.

The invention discloses a pressure regulating equipment state monitoring system and method based on data analysis, and relates to the technical field of equipment state monitoring. The method comprises the following steps: collecting electrical, mechanical and environmental signals of the voltage regulating equipment for preprocessing, and generating equipment response signals; calculating a dynamic response attenuation coefficient and a frequency spectrum offset degree based on the signal, and calculating a thermal noise gain coefficient according to equipment operation temperature data; by comprehensively analyzing the three parameters, the current running state of the equipment is judged, and a fault mode diagnosis result is generated, so that accurate equipment state monitoring and fault prediction are realized. Through multi-dimensional data fusion, accurate identification of multi-fault mode superposition and an early warning mechanism, the accuracy of equipment state monitoring and the fault prediction capability are improved, and the downtime and the maintenance cost are reduced.

The utility model relates to the technical field of transformer frameworks, and discloses a vertical transformer framework structure which comprises a framework assembly and a pin assembly installed below the framework assembly, a clamping assembly is installed on the pin assembly, a positioning groove is formed in the framework assembly, and a magnetic core assembly is arranged on the outer side of the framework assembly and the outer side of the pin assembly. The fixing assembly is installed on the magnetic core assembly, the fixing assembly can enable a magnetic core to be always kept in an attached relation after being disassembled and assembled, the situation that the magnetic core is loosened in the using process, and consequently a transformer is squealled is effectively prevented, meanwhile, ventilation grooves and communication grooves in the framework assembly are matched with each other, and effective heat dissipation can be conducted on a coil in a framework. And therefore, the normal working temperature is kept, and the working efficiency is improved.

The present application relates to the technical field of graphitization furnace temperature monitoring, and particularly relates to a graphitization furnace working temperature measuring device and a measuring method. The method comprises: obtaining furnace core thermocouple data, gas inlet pressure and gas mass flow rate of a protection tube during the working process of the graphitization furnace; obtaining viscosity correction flow resistance at each moment according to the thermocouple data, gas inlet pressure and gas mass flow rate at each moment; if the gas inlet pressure in a local period at a moment satisfies the pressure steady state condition and the thermocouple data satisfies the temperature reference interval, then obtaining flow resistance instantaneous fluctuation value according to the difference between the viscosity correction flow resistance at each moment in the period in which the corresponding moment is located and the overall distribution; obtaining a crack jet characteristic index by combining the flow resistance instantaneous fluctuation value and the gas inlet pressure, and then taking corresponding response actions. The present application provides reliable protection for the integrity of the thermocouple protection tube of the core temperature measuring element of the graphitization furnace, and improves the intelligent level and operation safety of the graphitization production process.

A method of operating an aerosol-generating device for generating an aerosol from an aerosol-forming substrate during a usage session is provided, the device including a heater, a power supply to supply power to the heater during the usage session, and control electronics; and the method including using the control electronics to: initiate one of a plurality of predetermined different heating profiles for the heater, each profile including different target operating temperatures for the heater, one profile including a temperature increase of subsequent target operating temperatures and another one profile including a temperature decrease of subsequent target operating temperatures, and control a supply of power to adjust a temperature of the heater to a target operating temperature, each of the plurality of target operating temperatures including between 4 and 7 different target operating temperatures, and the temperature of the heater increases or decreases linearly from one target to a next target.

The application provides a determination method and system of a reduction smelting separation operation temperature window, and relates to the technical field of metallurgical process parameter control. The determination method of the reduction smelting separation operation temperature window comprises the following steps: calculating the activity of V2O3 in the slag by using a multivariate slag series thermodynamic prediction model; obtaining a curve of the vanadium recovery rate changing with the temperature by performing temperature scanning calculation in a given temperature range; obtaining a target vanadium recovery rate, determining the lowest operation temperature; and determining the reduction smelting separation operation temperature window. By calculating the V2O3 activity under the raw material condition and combining the dynamic curve of the vanadium recovery rate, the lowest operation temperature meeting the target recovery rate is accurately locked. This realizes the adaptive adjustment of the operation temperature with the material fluctuation, avoids the energy waste caused by high temperature, prevents the recovery rate from falling caused by low temperature, and takes into account the high recovery rate and low energy consumption.

This invention discloses a method, apparatus, and equipment for evaluating the clamping force variation of exhaust manifold mounting bolts, relating to the field of fastener testing technology. The method includes measuring the axial force-strain relationship curves of the exhaust manifold mounting bolts at different temperatures, and the strain elongation of the bolt shank at operating temperature; combining the axial force-strain relationship curves to obtain the axial clamping force of the mounting bolt in the bolted connection at room temperature; measuring the strain elongation of the bolt shank in the bolted connection at operating temperature to obtain the residual strain elongation; and based on the residual strain elongation and the axial force-strain relationship curves, obtaining the residual axial clamping force and comparing it with the axial clamping force of the mounting bolt in the bolted connection at room temperature to evaluate the clamping force variation. This application can accurately reflect the clamping force attenuation of exhaust manifold mounting bolts under actual working conditions, improving the reliability and accuracy of measurement results.

This application provides a method for thermogravimetric analysis (TGA) of resin-based composite materials for aero-engine components, belonging to the field of composite material testing technology. The method includes: extracting the operating state points of the aero-engine components; simplifying the operating state points; determining statistical results of the component's operating temperature and operating time for the thermogravimetric analysis based on the simplified operating state points; conducting a preliminary thermogravimetric analysis based on the statistical results of the component's operating temperature and operating time; using the preliminary thermogravimetric analysis results as a benchmark, determining the thermogravimetric trend and the direction for conducting thermogravimetric analysis using a temperature gradient; determining the temperature threshold for thermogravimetric analysis based on the temperature gradient thermogravimetric analysis results; calculating the cumulative thermogravimetric rate of the composite material used in the aero-engine components over the entire engine lifespan by calculating the thermogravimetric rate at each operating temperature above the cumulative temperature threshold; and accelerating the thermal aging of a new test piece to the cumulative thermogravimetric rate to obtain performance loss results.

The invention provides a coal mining machine roller monitoring control system based on a hydroelectric interlocking mechanism, and the system comprises a sensing layer which comprises a waterway pressure sensor for monitoring the waterway pressure of a spraying system, a waterway flow sensor, a motor current transformer for monitoring the working current of a cutting motor, and an infrared temperature sensor for monitoring the temperature of a roller and a coal mining working surface; the control layer is internally provided with an abnormal temperature diagnosis data model so as to predict the working temperature under the current working condition and judge whether the working temperature is abnormal or not, and therefore a water pressure flow interlocking control strategy and a temperature gradient interlocking control strategy are generated; comprising an anti-explosion audible and visual alarm, a contactor for controlling start and stop of a cutting motor, a flow regulating valve for regulating the flow of a water spraying path of a spraying system, and a power-off protection device, and an execution layer executes matching actions based on a control strategy. And the coal mining machine can be automatically stopped and forcibly cooled when the cooling spray fails or the temperature suddenly rises.

A system for predicting corrosion under insulation for a network of insulated pipes, vessels, and tanks includes a corrosion modeling engine operable to receive sensor data and generate predicted rates of corrosion. The corrosion modeling engine includes a corrosion rate calculation module operable to compare an operating temperature of an insulated component to a dew point temperature of a surrounding environment to generate a predicted rate of corrosion, and a remaining life prediction module operable to generate a predicted remaining lifetime of the insulated component using the predicted rates of corrosion and on-stream inspection data. The system further includes an alarm communicatively coupled to the corrosion modeling engine and operable to alert an operator that the predicted rate of corrosion, the predicted remaining lifetime, or a combination thereof is within a pre-determined threshold.

The invention relates to a method (1000) for operating a compressed-air supply system (DS), the method comprising the following steps: a) limiting (1100) at least one line volume (LV) connected to an outlet opening (216, 216.1, 216.2) of the at least one drying chamber (210, 210.1, 210.2) by means of a pneumatic switching arrangement (230) of a compressed-air supply installation (200); b) activating a compressor (100) for drawing in and compressing (1200) ambient air (LU) to an operating pressure (pB); c) providing (1300) the compressed air (DL) at a compressed-air connection (1), the compressed air (DL) having an operating temperature (TB); d) pressurising (1500) at least one drying chamber (210, 210.1, 210.2) with the compressed air (DL) provided at the compressed-air connection (1) until a target pressure (pZ) of the compressed air (DL) in the at least one drying chamber (210, 210.1, 210.2), which is higher than the operating pressure (pB), is reached and / or until a target temperature (TZ) of a desiccant granulate (212) located in the drying chamber, which is higher than the operating temperature (TB), is reached; e) venting (1600) the compressed air (DL) from the at least one drying chamber (210, 210.1, 210.2) to the environment (U) when the target pressure (pZ) and / or the target temperature (TZ) is reached. The invention also relates to a compressed-air supply system (DS) for carrying out the method (1000).

The embodiment of the invention provides a control method for parallel operation of multiple pumps and related equipment, and belongs to the technical field of water pump control. The method is applied to a converter valve cooling system and comprises the steps that a first water pump and a third water pump are started at the same time, multi-source monitoring data of the first water pump and the third water pump are obtained, and the multi-source monitoring data comprise continuous operation time, power quality data, working temperature data and system pressure data of each water pump; according to the multi-source monitoring data, whether preset switching control conditions are met or not is judged, a target water pump is obtained, and the preset switching control conditions comprise a timing rotation condition, a power supply fault condition, an overheating protection condition and a pressure abnormity condition; and when the preset switching control condition occurs, pump switching control is conducted on the target water pump according to the bus relation on the basis of the preset delayed pump switching time. According to the embodiment of the invention, the switching stability during parallel operation of the multiple water pumps can be improved, energy-saving operation is realized, the service life of the system is prolonged, and the control cost is reduced.

The present invention relates to a method for cleaning an aerosol generating apparatus, an aerosol generating apparatus, and a medium. The method includes the steps of monitoring the insertion and removal state of the aerosol-forming substrate (200) in the aerosol generating apparatus (100), and, if the aerosol-forming substrate (200) is in the removed state, setting the temperature of the heating structure (11) to a self-cleaning temperature below the operating temperature so that any material adhering to or accumulated on the heating structure (11) is released by heat. The operating temperature is the heating temperature of the aerosol-forming substrate (200) by the heating structure (11). The method allows for the timely removal of soot adhering to or accumulated on the heating structure (11), enabling energy savings, improved taste, and maintenance of equipment hygiene.

This invention relates to the field of radial thrust bearing technology, specifically a radial thrust bearing comprising an inner ring, an outer ring, a cage, and balls, and a circulation mechanism. The inner ring is fitted inside the outer ring, and the balls are rolled and embedded between the inner and outer rings. The cage is installed between the inner and outer rings, with the balls located on the cage. The circulation mechanism is installed on both sides of the outer ring. This invention solves the problem that existing bearings still generate high internal temperatures at high speeds. High temperatures reduce the viscosity of the lubricating oil, leading to a thinner oil film, increased friction, and ultimately, accelerated bearing temperature rise. Excessive bearing operating temperature can cause the bearing to seize due to thermal stress. This invention achieves uniform heat transfer from the lubricating oil at high speeds, preventing the bearing from seizing due to excessive operating temperature.

The invention discloses an intelligent heat dissipation device of a dry-type transformer and a using method of the intelligent heat dissipation device, and belongs to the technical direction of transformer heat dissipation. The intelligent heat dissipation device comprises a dry-type transformer placement base, and two sets of supporting bases are symmetrically installed at the two ends of the outer portion of the dry-type transformer placement base correspondingly and are the first supporting base and the second supporting base correspondingly; two sets of heat dissipation grooves are symmetrically formed in the two ends of the exterior of the first supporting seat correspondingly, a plurality of sets of heat conduction rods are installed on one side of the interior of the first supporting seat in an array mode, a temperature sensor is fixedly installed on one side of the exterior of the first supporting seat, and a heat dissipation assembly and a second heat dissipation base are further arranged on the dry-type transformer placement base. Through cooperative use of the heat conduction rod, the electric fan set and the temperature sensor, the peripheral temperature of the dry-type transformer placement base can be detected, the heat dissipation mode can be changed according to different temperature values, heat is conducted to the heat conduction rod for heat dissipation when the operation temperature is low, and it is avoided that cold air makes direct contact with the dry-type transformer, and condensed water drops are generated.

The invention discloses an oil-immersed mutual inductor online monitoring method, system and device based on multi-parameter fusion and a medium. The oil-immersed mutual inductor online monitoring method based on multi-parameter fusion comprises the following steps: acquiring the operating temperature of an oil-immersed mutual inductor in real time through a temperature sensor, carrying out transverse and longitudinal comparison, and outputting an alarm signal according to a comparison result; the operation pressure of the oil-immersed mutual inductor is monitored in real time through the pressure sensor, the pressure and the pressure change rate of the oil-immersed mutual inductor are analyzed, an alarm signal is output according to the analysis result, the secondary output voltage or the secondary output current of the oil-immersed mutual inductor is collected in real time through the secondary output module, the secondary output voltage and the secondary output current are monitored, and the oil-immersed mutual inductor is monitored. And an alarm signal is output according to a monitoring result. According to the invention, various parameters such as equipment operation temperature, pressure, secondary output and the like are integrated for comprehensive monitoring, so that the operation condition of the mutual inductor can be reflected more comprehensively and accurately.

This application relates to an automatic temperature control device and method for drawing dies. Through the coordinated operation of a temperature monitor, cooling pipeline structure, cooling execution components, and a control component, the control component uses the real-time cavity temperature collected by the temperature monitor as feedback. After comparing this with a preset temperature threshold, it dynamically adjusts the medium supply opening of the cooling execution component, replacing the traditional crude temperature control methods of passive natural heat dissipation, fixed-flow cooling, or workshop environment cooling. This achieves real-time sensing and fully closed-loop automated control of the drawing die's working temperature, effectively preventing heat accumulation and thermal deformation in the die cavity due to continuous stamping friction. It solves the core pain points of traditional solutions, such as low temperature control accuracy and inability to adapt to the dynamic temperature control requirements of high-speed continuous stamping conditions. This fundamentally reduces forming defects such as dark cracks and splits in sheet metal during drawing, significantly improving the production yield of automotive body stamping parts and the stability of the production line cycle time.

The invention relates to the technical field of semiconductor waste gas treatment, and discloses an energy-saving control method and device for waste gas treatment equipment and electronic equipment. The energy-saving control method comprises the following steps: determining a first operating temperature according to the actual temperature of a water tank; under the condition that the actual temperature is within the operating temperature range, cooling water injection into the heat exchanger is stopped; wherein the upper limit of the operation temperature range is the first operation temperature, and the lower limit of the operation temperature range is the second operation stability; and when the actual temperature is larger than the second operation temperature, cooling water is injected into the heat exchanger. According to the method, an operation temperature range is set, injection of cooling water is stopped in the range, and cooling is started only when the temperature exceeds the upper limit of the range. According to the invention, the conversion from'continuous cooling 'to'on-demand cooling' is realized, the unnecessary cooling water consumption is obviously reduced on the premise of ensuring the safety of waste gas treatment, and the core problem of coexistence of'energy consumption waste 'and'operation risk' is solved.

This invention relates to the field of inverter technology, specifically to a user-side distributed fully immersion liquid-cooled micro-inverter and its application. It includes a housing for mounting the main inverter components and a cover plate for sealing the opening of the housing. The housing has an outlet pipe and an inlet pipe at its upper and lower ends, respectively. A speed control device is installed inside the inlet pipe. Fluid turbulence devices are installed on both side walls inside the housing, and heat dissipation devices are installed on both side walls outside the housing. This invention effectively reduces the inverter's operating temperature through full immersion liquid cooling. Simultaneously, the synergistic effect of the speed control device, fluid turbulence device, and heat dissipation device allows for real-time adjustment of the coolant flow rate and heat dissipation effect based on the temperature of the main inverter components.

The application provides a data processing method and system for correlation analysis of electromagnetic air pump operation temperature and service life, and relates to the technical field of data processing.The method comprises the following steps: obtaining multi-dimensional temperature parameters of an electromagnetic air pump during operation, and organizing the multi-dimensional temperature parameters into a discrete temperature data set; based on the discrete temperature data set, an abstract plane of the spatial distribution of the discrete temperature data set is constructed; a reference straight line is set on the abstract plane, and a plurality of division straight lines parallel to the reference straight line are obtained at a preset interval, with each adjacent two division straight lines forming a strip-shaped area, and each strip-shaped area being a data correlation area; the perpendicular distance of each discrete temperature data element to the reference straight line is calculated, and each data element is mapped to the corresponding data correlation area according to the perpendicular distance; the distribution characteristics of the data elements in each data correlation area are analyzed, and a temperature field reconstruction calibration factor is obtained.The application realizes accurate and dynamic prediction of the remaining service life of the electromagnetic air pump.

An improved multiport rotary valve assembly is disclosed, designed for applications such as direct lithium extraction processes. The assembly includes a valve body comprising a housing ring, upper and lower closure discs, and a process disc, along with a thermal management assembly. The thermal management assembly integrates an insulation member, a thermal regulation assembly, and / or a startup heating assembly to address temperature differentials caused by ambient and process conditions. The insulation member minimizes external thermal influences by closely fitting, wrapping around, or covering components of the valve. The thermal regulation assembly employs temperature sensors and heating elements to maintain dimensional stability and sealing integrity. The startup heating assembly facilitates rapid preheating of the valve body to operational temperatures, enhancing initial sealing reliability. This improved design enhances operational efficiency, reduces maintenance requirements, and ensures consistent performance in fluid flow applications under varying temperature conditions.

An improved multiport rotary valve assembly is disclosed, designed for applications such as direct lithium extraction processes. The assembly includes a valve body comprising a housing ring, upper and lower closure discs, and a process disc, along with a thermal management assembly. The thermal management assembly integrates an insulation member, a thermal regulation assembly, and / or a startup heating assembly to address temperature differentials caused by ambient and process conditions. The insulation member minimizes external thermal influences by closely fitting, wrapping around, or covering components of the valve. The thermal regulation assembly employs temperature sensors and heating elements to maintain dimensional stability and sealing integrity. The startup heating assembly facilitates rapid preheating of the valve body to operational temperatures, enhancing initial sealing reliability. This improved design enhances operational efficiency, reduces maintenance requirements, and ensures consistent performance in fluid flow applications under varying temperature conditions.

The utility model provides a silicon carbide burner temperature control device for an industrial kiln, which belongs to the technical field of temperature control devices and comprises a burner body, a control component inserted into the inner wall of the burner body, a temperature surface fixedly mounted on the side surface of the control component, and a disassembly component matched with the control component for use. According to the temperature control device for the silicon carbide burner, the durability and the reliability of the burner in a high-temperature industrial environment are remarkably improved through mutual matching of all the components, particularly, the working temperature of equipment in the operation process is effectively reduced through the arrangement of a cooling structure, so that the aging speed of materials is slowed down, and the service life of the equipment is prolonged. The service life of the equipment is remarkably prolonged, the maintenance and replacement process is greatly simplified through the design of the disassembly assembly, a technician can complete maintenance work of the temperature control device in a short time, the downtime of the equipment is shortened, and the operation efficiency of the whole production line is improved.

The present application relates to the technical field of fuel cell, and belongs to a kind of fuel cell stack gas pressure and temperature following intelligent control system and method.The present application establishes temperature-pressure-pressure stress coupling model, realizes real-time monitoring and quantitative evaluation to membrane electrode surface pressure stress, solves the problem of " invisible, uncontrollable " in the prior art stress state in stack, provides direct and reliable feedback basis for closed-loop control, eliminates the risk of overpressure damage or poor contact underpressure.At the same time, the working temperature of the stack is associated with the gas pressure, the target gas pressure is dynamically calculated according to the real-time temperature, and the gas pressure is changed by adjusting the speed of air compressor, hydrogen injection rail opening and throttle opening, so as to overcome the problem of stress fluctuation caused by independent control of temperature and pressure in traditional scheme, ensure that the membrane electrode is always in the preset pressure range, and the output performance of the stack and the service life of the membrane electrode are considered.

A defined thermal resistance variation of a drill string along its length is selected such that, when drilling the borehole through the drill string in an underground zone towards and then reaching a target measurement depth, the temperature of the drilling fluid at a wellhead assembly, to which the drilling fluid is delivered by the drill string, neither substantially exceeds nor falls below a target operating temperature range. The borehole is drilled with a drill string that is assembled during drilling to have a specific thermal resistance variation along its length.

Method for controlling the operation of a plain bearing, comprising the steps: a) Determining the temperature dependence of the dynamic viscosity of the lubricant in the plain bearing; b) Determining the transition temperature of the sliding bearing from semi-fluid friction to fluid friction; c) Determining the temperature dependence of the bearing characteristic λ(T) and the value of the bearing characteristic λ kr of the sliding bearing transition from semi-liquid to liquid friction based on the temperature dependence of the dynamic viscosity of the lubricant; d) Measuring the operating temperature of the plain bearing; e) Adjusting the operating temperature of the plain bearing to determine the bearing characteristic λ Rab near λ kr to be kept in a range that forms a transition between semi-fluid friction and fluid friction.