159 results about "Condensation temperature" patented technology

The invention discloses an industrial dangerous waste liquid treatment whole-process intelligent control method and system based on digital twinning, and relates to the technical field of intelligent control, and the method can recognize the sudden change trend of a liquid level and bubbles in real time through a tension field twinning mapping prediction model and the calculation of a bubble form volatilization unsteady state index. Based on a standard data set collected in real time, when the liquid level has an abnormal sudden change trend, early warning can be performed in advance, and a linkage control strategy is automatically triggered. For example, when the liquid level sudden change pre-judgment index R exceeds a safety threshold value, bubble evaporation twinborn prediction is automatically triggered, and control means such as stirring speed reduction and condensation temperature adjustment are executed. According to the intelligent control based on digital twinning and twinning feedback, the reaction environment in the waste liquid treatment process can be accurately controlled, the risk that the reaction is out of control is greatly reduced, lagging reaction and misoperation in a traditional method are avoided, and continuous and stable reaction process is ensured.

The invention discloses a large-scale cruise ship water chilling unit pipe network cold storage intelligent energy-saving control method based on double-layer deep reinforcement learning, which comprises the following steps: 1, carrying out inherent cold storage engineering modeling on a chilled water pipe network of a water chilling unit to obtain an energy balance relationship between equivalent cold storage capacity and cold release sustainable time of the pipe network and bearable cold capacity; the relationship is used as a physical prior to introduce strategy learning and a security boundary; 2, constructing a double-layer deep reinforcement learning architecture; 3, a safety layer is additionally arranged in the double-layer deep reinforcement learning architecture, the safety layer cuts and projects output feasible regions of a target layer and a sublayer through a hard constraint and barrier mechanism, the water supply temperature, the temperature difference, the start-stop interval, the condensation temperature and the power change rate are ensured, and the maritime affair safety requirement is met; and 4, on the basis of a pipe network inherent cold storage model, a double-layer deep reinforcement learning framework and a safety layer, peak load shifting control of low-load cold charging-high-load cold discharging is achieved, and unit cold energy consumption of the water chilling unit is reduced.

The invention discloses a condensation pressure reference control method and device for an ammonia absorption type refrigeration system. The method comprises the following steps: establishing an absolute physical reference, namely a target condensing pressure, determined by ammonia physical properties, wherein the value is uniquely determined at a given condensing temperature; the condensing pressure is detected in real time; and with approaching as a target, working condition parameters of the ammonia purification device are adjusted, so that the purity of ammonia vapor entering the evaporator is close to 100%. The device is an electronic control or self-operated machine. According to the method, the condensing pressure is increased to be an active physical reference based on the double-rigidity constraint of fixed ammonia charge and determined condensing pressure, so that the system automatically approaches to a theoretical optimal state in a wide temperature range, the rectification fault risks such as tower flooding and tower flushing are remarkably reduced, the energy efficiency is improved, and the method is suitable for industrial waste heat recovery, refrigeration houses and other scenes.

The invention relates to the field of engine intake and exhaust system control, in particular to an EGR system control method, a vehicle, electronic equipment and a storage medium. The EGR system comprises an EGR waste gas temperature adjusting unit and an EGR valve, wherein the EGR waste gas temperature adjusting unit is connected with the EGR valve through a pipeline; the EGR system control method comprises the steps that the condensation temperature threshold value of temperature-adjusted waste gas is obtained, and the temperature-adjusted waste gas is waste gas exhausted by an engine with the temperature adjusted through an EGR waste gas temperature adjusting unit; determining the condensation risk degree of the temperature-adjusted waste gas based on the condensation temperature threshold value and the temperature of the temperature-adjusted waste gas; if the condensation risk degree belongs to the first condensation risk grade, the cooling degree of waste gas exhausted by the engine is lowered through an EGR waste gas temperature adjusting unit; if the condensation risk degree belongs to a second condensation risk level, the opening degree of the EGR valve is controlled to be reduced; wherein the second condensation risk grade is higher than the first condensation risk grade. According to the method, generation of condensate water can be accurately prevented, and the high EGR rate is guaranteed as much as possible.

The application discloses a kind of switch cabinet purification method, system, device, storage medium and computer equipment.The method comprises: obtaining the environmental information of all grid spaces pre-divided in switch cabinet, wherein each grid space has the same spatial complexity;Based on the environmental information of each grid space, determine the condensation temperature threshold and particulate matter deposition threshold corresponding to each grid space, and monitor the temperature information and particulate matter concentration information of each grid space;Determine whether the temperature information of each grid space is less than or equal to the condensation temperature threshold corresponding to the grid space, and whether the particulate matter concentration information is greater than or equal to the particulate matter deposition threshold corresponding to the grid space;If the temperature information is less than or equal to the condensation temperature threshold and / or the particulate matter concentration information is greater than or equal to the particulate matter deposition threshold, then perform environmental purification work on the switch cabinet.The above method can greatly improve the environmental purification effect of switch cabinet.

The invention discloses an operation control method of a heating and ventilation system, the heating and ventilation system and related equipment. The heating and ventilation system comprises a heat source unit, a heat storage module and a control unit. Wherein the heat storage module is provided with a phase change material and at least one temperature sensor, and the heat source unit is connected with the heat storage module through an energy charging flow path. The control unit determines the target condensation temperature of the heat source unit based on the temperature, detected by the temperature sensor, of the phase change material when the heat storage module is charged; and controlling the compressor frequency of the heat source unit based on the target condensation temperature. In this way, the system can effectively improve the operation efficiency and the energy utilization rate, and meanwhile the stability and reliability of the system are ensured.

The invention relates to a refrigerating system control method and device, computer equipment and a computer readable storage medium, and the method comprises the steps that in the operation stage of a refrigerating system, the target frequency of an inverter compressor is obtained according to the required refrigerating capacity of a secondary refrigerant side and the target condensation temperature and target evaporation temperature of a refrigerant side; controlling the inverter compressor to output by taking the target frequency as the current frequency, and running for a first preset duration; and when the current frequency is within the upper and lower limit range of the target frequency, the current frequency of the inverter compressor is adjusted based on the relation between the actual liquid supply temperature flowing to the evaporator from the refrigerant side and the target liquid supply temperature. The actual liquid supply temperature is close to the target liquid supply temperature so as to guarantee the temperature control effect, meanwhile, the inverter compressor can operate at the frequency matched with the temperature control working condition, the inverter compressor is prevented from operating at the high frequency all the time, power consumption of a refrigerating system and a heating system is reduced, meanwhile, temperature control through excessive dependence on the heating system can be avoided, and the energy consumption of the refrigerating system and the heating system is reduced. And the temperature control effect is ensured.

The present disclosure provides methods and systems for producing a C4+ compound, including the steps of: (i) reacting a feed stream comprising C1+O1-3 hydrocarbons in the presence of an acid condensation (AC) catalyst at a condensation temperature and condensation pressure to produce an AC product stream including the C4+ compound; (ii) fractionating AC product stream into an AC liquid product stream including organic products and a vapor stream; (iii) fractionating the AC liquid product stream by a fractionation column into a liquid C4+ compound product stream and a gaseous overhead stream; (iv) cooling the gaseous overhead stream to produce a liquid reflux stream and a gaseous vent stream; (v) recycling a first portion of the liquid reflux stream to the fractionation column for the fractionation in step (iii); and (vi) recycling a second portion of the liquid reflux stream to the feed stream for the reaction in step (i).

The invention provides an evaporative cooling air conditioner control system for energy-saving operation of a low-condensation-temperature compressor, and relates to the technical field of automatic control, and the evaporative cooling air conditioner control system comprises an acquisition module which is used for acquiring the dry-bulb temperature and the wet-bulb temperature of outdoor air and the indoor return air temperature and the air supply temperature in real time, and calculating the heat transfer efficiency of a current air heat exchanger according to indoor and outdoor parameters; the judgment module is used for judging whether the current operation condition meets the operation condition of the indirect evaporative cooling mode or not according to the heat transfer efficiency and by combining the outdoor wet bulb temperature and the indoor set air supply temperature, and a judgment result is obtained; the control module is used for prohibiting starting of the compressor and utilizing a natural cold source if the judgment result meets the indirect evaporative cooling mode condition; and if the judgment result shows that indirect evaporative cooling cannot meet the refrigeration requirement, the compressor is allowed to be started, and mechanical cold supplementing is conducted. The energy consumption is effectively reduced, the refrigeration efficiency is improved, and energy-saving and efficient operation is achieved.

The invention discloses a composite working medium condensation and separation device for a semi-closed S-CO2 power cycle system, relates to the technical field of composite working medium condensation and separation, and solves the problem of separation of gaseous water in a CO2 working medium. The device comprises a composite working medium inlet drain pipe box, a circulating water shell and a working medium outlet pipe box which are vertically arranged and sequentially connected, wherein a spiral heat exchange pipe bundle is arranged in the circulating water shell; the composite working medium inlet drain pipe box, the spiral heat exchange pipe bundle and the working medium outlet pipe box are sequentially communicated; the composite working medium inlet drain pipe box is provided with a composite working medium inlet connecting pipe and a drain outlet connecting pipe; a water supply inlet connecting pipe and a water supply outlet connecting pipe are arranged on the circulating water shell; a working medium outlet connecting pipe and a starting exhaust port connecting pipe are arranged on the working medium outlet pipe box, and a wire mesh demister is arranged in the working medium outlet pipe box. According to the invention, through the coiled tube type heat exchanger, circulating water is adopted as a cold source to cool and condense the composite working medium, and based on the condensation temperature difference of CO2 and H2O, efficient separation of two components of CO2 and H2O is completed.

The invention relates to a dynamic method for maintaining a predetermined supercooling of the refrigerant exiting the condenser by means of dynamically controlling the circulating mass of the refrigerant by transferring refrigerant into or to a reservoir installed in parallel with the connection between the condenser and the regulator depending on the temperature difference between the condensation temperature of the saturating liquid and the outlet temperature of the condenser.

A method for determining an optimal condensing temperature of a refrigerant being used in a compressor-condenser-arrangement is presented, comprising the following steps: determining an actual operating condition of the compressor-condenser-arrangement; determining base-values of compressor-operation; determining base-values of condenser-fan-operation; determining an actual value of compressor-operation and calibrating the base-values of compressor-operation, and / or determining an actual value of condenser-operation and calibrating the base-values of condenser- fan-operation; determining a total power and determining the operating condition of the compressor-condenser-arrangement for which the total power is minimized and determining the condensing temperature for this operating condition as the optimal condensing temperature. Furthermore, an apparatus adapted to carry out the method and an according computer program are described.

The invention belongs to the technical field of condensation collection devices, and particularly relates to a condensate collection system and method with expiration and environment sampling functions, and the system comprises an air inlet unit, an air outlet unit, a flow rate monitoring unit, a temperature monitoring unit, a condensate collection unit and a power control unit; the air inlet unit comprises an air inlet pipe, a one-way valve and an air pump, an air outlet of the air inlet pipe is connected with the condensate collecting unit, and the air pump is used for exhausting air in an environment sampling mode; the gas outlet unit is used for discharging condensed gas from the condensate collecting unit; the flow rate monitoring unit is used for monitoring the air inlet flow rate in real time; the temperature monitoring unit is used for monitoring the condensation temperature in real time; the condensate collecting unit comprises a refrigerating module and a condensate collecting bottle, and the refrigerating module is used for refrigerating the condensate collecting bottle; the power control unit is used for regulating and controlling the refrigeration power of the refrigeration module according to the air inlet flow speed and the condensation temperature. The system is comprehensive in function, and refrigeration energy efficiency is improved through feedforward-feedback control.

The application provides a control method for a heat pump system and the heat pump system, and comprises a compressor, a hot water heat exchanger, an outdoor air heat exchanger, a cold water heat exchanger and a gas-liquid separator which are connected by a circulating pipeline assembly, and the circulating pipeline assembly comprises an output pipeline, a first input pipeline, a second input pipeline and a third input pipeline; wherein a first pipeline assembly arranged on the liquid side of the outdoor air heat exchanger is connected with a second pipeline assembly composed of the first input pipeline and the output pipeline and a third pipeline assembly composed of the second input pipeline and the third input pipeline; the technical problem solved by the application is that in the existing heat pump system, the maximum refrigerant medium is in the refrigeration main mode, after the refrigerant medium is filled into the heat pump system, in other refrigeration modes, heating modes and heating main modes, the excessive refrigerant liquid is retained in the condenser, which causes the refrigerant medium to be over-cooled too much, the condensation temperature of the refrigerant medium is increased, and thus the heat exchange effect of the heat pump system is affected.

The present disclosure belongs to the technical field of heat pump system, in particular to a double-cold-source integrated air source heat pump roof unit and a control method thereof. The unit comprises a refrigerant circulation loop, wherein a compressor, a water-cooled condenser, an air handling unit and at least two groups of parallel finned coil units are arranged. The unit can realize independent defrosting of a single finned coil in cooling, heating and heating modes by controlling the opening and closing and on-off of valves. The unit integrates water-cooled refrigeration, air source heat pump heating and independent defrosting of components. In the cooling mode, the water-cooled condensing method is used to greatly reduce the condensing temperature, and the evaporator refrigerant vapor does not need to pass through a four-way valve, thereby reducing the suction pipe pressure drop and improving the refrigeration energy efficiency. In the heating and defrosting process, the indoor heating is not interrupted. The unit has high integration degree, low operation cost, high reliability, high system comprehensive energy efficiency ratio, energy saving and environmental protection.

The utility model relates to an air source ice bath unit capable of being used for cold and hot simultaneously. The air source ice bath unit comprises a compressor, a first stop valve, a third stop valve, a fourth stop valve, a four-way reversing valve, a condenser, a heat recoverer, a first evaporator, a second evaporator, a first expansion valve, a second stop valve and a second expansion valve. The device has the advantages that the device has a waste heat recovery function, and heat of the condenser can be recovered for hot water or a swimming pool; and the condensing temperature is lower, the throttling temperature is reduced, and cold water with lower temperature is generated.

The application provides a CO2 capture control method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring a CO2 capture concentration in amine liquid at an outlet of an absorption section; and when a deviation between the CO2 capture concentration and a target capture concentration exceeds a preset deviation range, adjusting a condensation temperature of a condensation section by using a pre-constructed coupling relationship between the condensation temperature and the carbon capture concentration. Compared with a traditional method of adjusting amine liquid flow, the application establishes a coupling relationship between condensation dewatering and carbon capture absorption collaborative control, adjusts the CO2 capture concentration of the absorption section by adjusting the condensation section temperature, and improves the accuracy of CO2 capture.

The present application relates to the field of district heating system, and particularly relates to a kind of double-compressor air source heat pump valve coordination control method, system and storage medium.The control method includes: fin heat exchanger enters defrosting mode, interval time acquisition compressor low pressure, high pressure, ambient temperature, defrosting time and fin liquid pipe temperature;According to the low pressure value and safety limit value of real-time acquisition, the control value of the first calculation main electronic expansion valve opening degree and defrosting electronic expansion valve opening degree;According to the condensing temperature and minimum limit value of real-time acquisition, the control value of the second calculation main electronic expansion valve opening degree and defrosting electronic expansion valve opening degree;According to the real-time liquid pipe temperature and guide value, the control value of the third calculation main electronic expansion valve opening degree and defrosting electronic expansion valve opening degree.The present application is adjusted intelligently, in district heating system, ensure that compressor is always in safe working condition, effectively reduce the failure rate of heat pump unit, improve the defrosting speed and operating efficiency of heat pump unit.

The present disclosure provides methods and systems for producing a C4+ compound, including the steps of: (i) reacting a feed stream comprising C1+O1-3 hydrocarbons in the presence of an acid condensation (AC) catalyst at a condensation temperature and condensation pressure to produce an AC product stream including the C4+ compound; (ii) fractionating AC product stream into an AC liquid product stream including organic products and a vapor stream; (iii) fractionating the AC liquid product stream by a fractionation column into a liquid C4+ compound product stream and a gaseous overhead stream; (iv) cooling the gaseous overhead stream to produce a liquid reflux stream and a gaseous vent stream; (v) recycling a first portion of the liquid reflux stream to the fractionation column for the fractionation in step (iii); and (vi) recycling a second portion of the liquid reflux stream to the feed stream for the reaction in step (i).

The invention provides a refrigeration equipment control method and device, a refrigerator and a computer readable storage medium. The method comprises the steps that the current condensation temperature and the current position temperature corresponding to the target condensation position of target refrigeration equipment are obtained; determining a target duty ratio corresponding to the target heating device according to the current condensation temperature and the current position temperature; and according to the target duty ratio, the target heating device is controlled to conduct heating, so that condensation at the target condensation position of the target refrigeration equipment is prevented. According to the refrigeration equipment control method provided by the invention, the current condensation temperature of the current condensation and the current position temperature corresponding to the target condensation position can be obtained, and the target duty ratio corresponding to the target heating device can be determined according to the current condensation temperature and the current position temperature; the heating device is controlled to heat according to the target duty ratio, so that the heating device can be prevented from working continuously, and energy consumption is reduced while condensation is prevented.

The invention relates to a melt spinning device for extruding filaments (F), in particular made of a polyamide which releases monomers and / or oligomeric compounds (70) during extrusion, comprising a spinning manifold (2) for extruding the filaments (F) into an extrusion zone (5) from which the filaments are extruded, and a cooling cylinder (4) for cooling the filaments (F), which adjoins the extrusion zone (5), a degassing device (6) with a coupling section (62) is positioned in the extrusion zone (5), which has a heating device (8) for heating the monomers and oligomeric compounds above its condensation temperature (KT) and is in fluid-tight contact with the cooling cylinder such that a passive gas flow (72) can be directed from the cooling cylinder towards and into the degassing device (60), the invention further relates to a degassing device (6) for collecting the monomeric and / or oligomeric compounds (70).

The present application belongs to the technical field of steam pipeline monitoring, and discloses a steam pipeline condensation monitoring method based on non-equilibrium condensation temperature recovery characteristics. After non-equilibrium condensation occurs, steam almost absorbs all the latent heat of condensation, and the temperature of steam usually rises during condensation, which is called "temperature recovery". This non-equilibrium condensation "temperature recovery" feature is found in existing steam pipeline test measurements. When steam flows in the pipeline, if condensation does not occur, the temperature of steam will decrease due to heat loss; if "temperature recovery" occurs, it indicates that condensation occurs in the flowing steam. Therefore, by measuring the temperature change of the pipe section, it can be determined whether condensation occurs in the steam. By using the "temperature recovery" characteristics of non-equilibrium condensation of steam pipeline, the temperature change of the pipe section is measured to determine whether condensation occurs in the steam pipeline, which has the advantages of less measurement parameters, simple process, low cost and large-scale market application prospect.

The invention relates to an electronic expansion valve control method suitable for an R290 refrigerant and a heat pump system. According to the method, under the high-water-temperature working condition, the ideal condensing pressure is obtained through the average value of the outlet water temperature and the frequency of a compressor, and the ideal evaporating pressure is obtained through the average value of the environment temperature and the frequency of the compressor; the ideal target exhaust temperature is obtained based on the condensation temperature, the ideal condensation pressure and the ideal evaporation pressure, that is, an ideal target exhaust temperature model is dynamically corrected in combination with real-time operation data feedback, and the control precision of multi-parameter coupling is improved; the opening degree of the electronic expansion valve is corrected through the deviation between the exhaust temperature and the ideal target exhaust temperature, the actual exhaust temperature over-limit risk can be reduced, and the system stability and the response speed are remarkably improved. Meanwhile, a segmented dynamic compensation strategy is carried out according to the deviation between the exhaust temperature and the ideal target exhaust temperature, the nonlinear response of the electronic expansion valve under the high-temperature working condition can be effectively restrained, and it is further ensured that the exhaust temperature of the compressor rapidly approaches the ideal target value.

A gas separation device generally includes a gas separation chamber, at least one cooling plate disposed in the gas separation chamber, and a carbon adsorber disposed in an adsorbed gas capture chamber. The gas separation chamber has a rim that defines a first interior environment when placed on top of the weathered layer. A cooling plate is disposed in the gas separation chamber, where the cooling plate is maintained at a first temperature higher than 5 DEG K, the first temperature being a condensation temperature at which the higher temperature condensed gas condenses. The adsorptive gas capture chamber defines a second interior environment in communication with the first interior environment. The carbon adsorber is disposed in the second internal environment and maintained at a second temperature below 3 DEG K. The carbon adsorber is configured to capture cryogenic condensed gas.

The invention discloses a refrigerating system, a control method thereof and a state confirmation method of an outdoor heat exchanger. The state confirmation method for the outdoor heat exchanger of the refrigerating system comprises the steps that data are collected regularly; a temperature reference value is obtained through calculation based on the collected temperature values, and a data consistency weight is obtained based on the deviation between each temperature value and the temperature reference value; calculating to obtain a dynamic heat transfer coefficient; theoretical temperatures of other temperature values are obtained through calculation; obtaining the model confidence coefficient weight of each temperature value according to the deviation between each temperature value and the theoretical temperature; according to all the temperature values, the data consistency weight and the model confidence coefficient weight, the virtual condensation temperature of the outdoor heat exchanger is obtained through calculation; and when the virtual condensation temperature is within the normal condensation temperature range, determining that the condensation pressure of the outdoor heat exchanger is normal, otherwise, determining that the condensation pressure is abnormal. The state of the condensing pressure of the outdoor heat exchanger can be estimated more accurately, and a good fault-tolerant mechanism is achieved.

The invention discloses low-chlorine-content sponge titanium and a preparation method and device thereof. The preparation method comprises the steps that a titanium rod is placed in liquid magnesium, titanium tetrachloride is added, a reduction reaction is carried out, the titanium rod is moved out, and vacuum distillation is carried out; the vacuum distillation time is more than or equal to 10h / t-Ti, and the condensation temperature in vacuum distillation is less than or equal to 350 DEG C; when the condensate water is closed, the condensation temperature is in a decreasing trend and the temperature decreasing rate is greater than or equal to 3 DEG C / h, judging a distillation end point: stopping vacuum, calculating the H volatilization pressure rise rate after 10 minutes, and stopping vacuum distillation when the H volatilization pressure rise rate is less than or equal to 0.3 Pa / min; the volatilization pressure rise rate H is equal to L2 pressure rise rate minus L1 air leakage rate. According to the method, volatilization channels are additionally arranged in the liquid magnesium, so that the volatilization resistance of Mg / MgCl2 in pores of the sponge titanium is reduced; in addition, the vacuum distillation end point is judged by adopting a composite method, so that the production of the sponge titanium with low chlorine impurity content is realized.

The invention provides a water pan, a ceiling unit and an air conditioner. The water pan comprises an annular body, one side of the annular body is provided with a first annular wall, a second annular wall and a third annular wall, the first annular wall is located on the inner side of the second annular wall, the third annular wall is located between the first annular wall and the second annular wall, and a water receiving groove is formed between the first annular wall and the third annular wall. An isolation groove is formed between the second annular wall and the third annular wall, and the third annular wall is arranged to prevent condensate water in the water receiving groove from flowing to the isolation groove. In the operation process of the ceiling machine in the high-temperature and high-humidity environment, a large amount of condensate water in the water receiving tank makes direct contact with the third annular wall, the temperature of the third annular wall can be rapidly lower than the condensation temperature, condensation occurs on the side face, back to the first annular wall, of the third annular wall, however, the part of condensate water is little and falls into the isolation groove, and the condensation effect is not affected. And the temperature of the second annular wall cannot be lower than the condensation temperature, so that condensate water cannot drop outwards from the air outlet of the ceiling unit.

This utility model discloses a surface-resistant, heat-insulating, and flexible double-layer pipe with anti-condensation properties. It includes an inner delivery pipe and an outer protective pipe. The inner delivery pipe is located inside the outer protective pipe, and a heat insulation layer is formed between them. Several support strips are provided within the heat insulation layer. The inner delivery pipe is fixedly connected to the inner side of each support strip, and the outer protective pipe is fixedly connected to the outer side of each support strip. This utility model's surface-resistant, heat-insulating, and flexible double-layer pipe, with its heat insulation layer and specific vacuum design, effectively blocks heat transfer between the inner and outer layers, significantly reducing condensation on the pipe surface, preventing corrosion, and lowering maintenance costs. The optimized shape of the support strips at the inner and outer connections enhances the connection strength and structural stability of the inner and outer pipes, ensuring heat insulation performance.