340 results about "Chilled water" patented technology

The invention provides a wind-water linkage energy-saving control system for an urban rail transit underground station. The wind-water linkage energy-saving control system comprises a management layer; the control layer is divided into three relatively independent and expandable cooperative control subsystems capable of independently acquiring information according to the type of equipment, the control layer comprises a large system cooperative control subsystem, a small system cooperative control subsystem and a water system cooperative control subsystem, and the cooperative control among the cooperative control subsystems is completed by the management layer platform; a control strategy of the urban rail transit underground station wind-water linkage energy-saving control system comprises a system calendar scheduling strategy; a system control strategy; comprising a large system air conditioner adding strategy, a large system air conditioner reducing strategy, a water system starting working condition setting strategy, a water system operation working condition switching strategy, a cooling water temperature difference optimization setting strategy, a chilled water temperature difference optimization setting strategy, a most unfavorable tail end pressure difference setting strategy, a most unfavorable tail end pressure difference control strategy and a water chilling unit adding strategy. A water chilling unit reduction strategy, a water chilling unit alternation strategy and a water chilling unit operation load balancing strategy; and the system cooperative control comprises one-key startup of the water chilling machine room, one-key shutdown of the water chilling machine room, one-key startup of the water chilling unit, one-key shutdown of the water chilling unit, automatic addition of the water chilling unit and automatic reduction of the water chilling unit.

The invention discloses a heating, ventilation and chilled water cooperative control method and system based on a double-branch deep and shallow feature fusion neural network, and the method comprises the steps: obtaining and preprocessing the historical operation data of a heating, ventilation and chilled water system, and forming standardized training data; a double-branch deep and shallow feature fusion neural network model is trained based on the standardized training data, and the model realizes equipment collaborative prediction through a cold water host load prediction branch and a freezing pump frequency prediction branch in combination with a deep and shallow feature fusion mechanism; acquiring environmental parameters in real time, inputting the environmental parameters into the trained model, and outputting a cold water host load predicted value and a freezing pump frequency predicted value; and correcting the predicted value based on a physical constraint correction algorithm, and outputting an optimization control instruction. The technical problem of poor control reliability caused by insufficient equipment collaboration, insufficient feature extraction and lack of physical constraints in the prior art is solved.

The invention relates to a group control optimization method and system for a cold station system, and belongs to the technical field of automatic control, and the method comprises the steps: carrying out the minimum optimization of a first-stage group control optimization objective function through a mixed integer programming algorithm with the start-stop state of each device as an optimization variable during the operation of the cold station system, and obtaining a second-stage group control optimization objective function; the start-stop state of each device of the cold station system is controlled during first-stage group control; and on the basis of the first-stage group control, performing minimum optimization on the second-stage group control optimization objective function by taking chilled water outlet water temperature, chilled pump frequency, cooling pump frequency and cooling tower frequency as optimization variables through a model prediction control algorithm, and controlling the operation state of operation equipment when the cold station system is in the second-stage group control. Therefore, energy consumption is reduced as much as possible and energy efficiency is improved.

The invention provides an evaporative cooling type water cooling system and a control method thereof.The evaporative cooling type water cooling system comprises a compressor, a freezing pipeline and an evaporator, a freezing water pump is arranged on the freezing pipeline, and the control method of the evaporative cooling type water cooling system comprises the steps that the frequency of the compressor is adjusted, the water outlet temperature of the freezing pipeline is within a first preset range, and the frequency when the compressor is stable at the moment is obtained; an adjustment coefficient X is obtained according to the ratio of the frequency F1 when the compressor is stable to the maximum set frequency F1max of the compressor; determining the initial adjustment frequency of the chilled water pump through the adjustment coefficient X; and adjusting the frequency of the chilled water pump on the basis of the operation of the initial adjustment frequency of the chilled water pump to enable the evaporation temperature of the evaporator to be within a second preset range. By means of the technical scheme, the problem that in the prior art, an evaporative cooling type water cooling system is high in energy consumption can be solved.

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 relates to the technical field of refrigeration equipment intelligent supervision, and discloses a refrigeration equipment operation supervision method and system based on multi-dimensional data analysis, and the method comprises the steps: collecting multi-dimensional operation data of refrigeration equipment; remote start-stop control and operation parameter adjustment are carried out on the equipment, and a control task is automatically executed based on a preset schedule; monitoring equipment states in real time, setting dynamic early warning thresholds according to equipment types and working conditions, and performing graded early warning; fusing and analyzing the multi-dimensional data, generating a correlation analysis chart and calculating a comprehensive energy efficiency ratio; and an operation strategy is dynamically optimized through a data driving model, and the optimal number of water chilling units, the chilled water temperature and the cooling tower fan rotating speed are solved. The system corresponds to the method. According to the application, the problems of single traditional supervision data, low control efficiency, inaccurate early warning and the like are solved, closed-loop supervision is realized, the equipment operation efficiency is improved, and the energy waste is reduced.

The invention relates to the technical field of automatic control, in particular to a pipeline blockage risk identification and early warning method for multiple water chilling units of a central air conditioner, which comprises the following steps: collecting a cold water pressure difference signal, processing temperature difference data, extracting offset characteristics, analyzing a temperature track, identifying sudden change and matching flow response, and judging response abnormity. According to the method, the blockage head is identified through the differential pressure change rate jump, the response sensitivity is enhanced, the temperature difference continuous offset and the differential pressure event are combined, the identification accuracy and time efficiency are improved, the temperature sudden change and the flow response rhythm are superposed, a physical chain verification mechanism is constructed, and the high-frequency abnormal pipe section is identified. The reliability of analysis logic is enhanced, response interval and adjustment period consistency analysis is introduced, the adaptive capacity under complex working conditions is improved, pipe sections are collected according to abnormal frequencies, a multi-feature structured result is output, the data support of maintenance decision is enhanced, and the perspectiveness of blockage recognition is improved through multi-source feature fusion and time sequence rule judgment.

The invention discloses a data center multi-cold-source intelligent regulation and control method and system based on characteristic temperature prediction, and the method comprises the steps: building a machine room characteristic temperature model through an entropy method, and obtaining a machine room characteristic temperature value through calculation; establishing a machine room cooling load and characteristic temperature prediction model based on the characteristic temperature value and the historical operation data; constructing an energy consumption mathematical model of main energy consumption equipment of the refrigeration system; establishing a cost function taking cold energy supply and demand balance as a constraint condition; performing rolling optimization on the cost function by using a particle swarm optimization algorithm, and solving to obtain an optimal control sequence of the chilled water supply temperature and the chilled water flow; and the field control cabinet transmits a water supply temperature setting signal to the refrigerator control cabinet for execution, transmits a flow setting signal to the flow control valve for execution, and realizes automatic optimization regulation and control of the refrigeration system through real-time feedback correction. On the premise that the temperature of the data center machine room is stable, the energy consumption of the refrigerating system is remarkably reduced, and the operation efficiency and the intelligent level of the system are improved.

In the conventional refrigerant leakage detection method, when a failure occurs in the temperature sensor or the pressure sensor, the refrigerant leakage may not be detected.SOLUTION: The refrigerant leakage detection system 1 includes the chiller 10 and the input unit 110. The chilled water chiller 10 has a refrigerant circuit 50 through which a refrigerant circulates. The input unit 110 acquires the degree of supercooling and the expansion valve opening degree from the cold water chiller 10. The controller 120 performs refrigerant leakage determination using the degree of subcooling, or refrigerant leakage determination using the expansion valve opening degree. When the priority of the refrigerant leak determination using the degree of subcooling is higher than the priority of the refrigerant leak determination using the expansion valve opening degree, the controller 120 switches between the refrigerant leak determination using the degree of subcooling and the refrigerant leak determination using the expansion valve opening degree on the basis of whether or not the degree of subcooling is normal.SELECTED DRAWING: Figure 4

The invention provides a data analysis system and method for evaluating a data center cold water link state, and belongs to the technical field of data center infrastructure intelligent operation and maintenance. According to the system, multi-source operation data of a cold machine, a water pump, a tail end air conditioner and a cabinet monitoring system in a cold water link are collected, and a dynamic threshold pool is constructed after working condition layering preprocessing so as to identify equipment abnormity; the method comprises the following steps: establishing a directed graph model based on a chilled water system topological structure, constructing a Bayesian network by fusing process logic, and reversely calculating a root cause posterior probability of each device when a cabinet hotspot event occurs; and generating an influence weight ranking list by integrating the abnormal strength of the equipment, the root cause probability, the topological key coefficient and the redundancy weakening coefficient, and further performing quantitative scoring and state grading on the overall availability of the cold water link. According to the method, working condition self-adaptive anomaly detection, robust root cause positioning and executable operation and maintenance priority ranking of the cold water link are realized, and the operation and maintenance efficiency and reliability of the refrigeration system of the data center are improved.

The utility model provides a heat pump system for treating high-salt waste liquid, and relates to the technical field of waste liquid treatment. A first containing cavity and a pipe body communicated with the first containing cavity are formed in an evaporation tank, the first containing cavity is used for containing high-salt waste liquid, a second containing cavity is formed between the pipe wall of the pipe body and the inner wall of the evaporation tank, and an opening is formed in the top of the pipe body. A first coil pipe of the refrigerant loop is located in the first containing cavity and makes contact with the high-salt waste liquid so that the high-salt waste liquid can be boiled and evaporated. A second coil pipe of the cold water module is wound on the outer wall of the pipe body, and the two ends of the second coil pipe are connected with the cold water assembly, so that cooling liquid in the cold water assembly flows through the second coil pipe to absorb heat of steam. According to the technical scheme, an outdoor unit structure is omitted, the cold water module is additionally arranged, the second coil pipe of the cold water module is used for heat exchange, cooling capacity is provided, the comprehensive energy efficiency is improved by 5%-10%, and the waste liquid treatment cost is reduced.

The utility model relates to the technical field of storage devices, in particular to a copper corrosion inhibitor storage device for a lithium bromide chilled water system, which performs position adjustment through an adjusting device, performs lifting adjustment through a lifting device and performs monitoring through the distance of a monitoring device relative to the storage device. The storage device is limited through the limiting device, and the copper corrosion inhibitor is stored through the storage device; comprising a console; the device further comprises an adjusting device, a lifting device, a monitoring device, a limiting device and a storage device, the adjusting device and the storage device are both installed on the operation table, and the lifting device, the monitoring device and the limiting device are all installed on the adjusting device. The adjusting device adjusts the position, the lifting device lifts, the monitoring device monitors the distance, the limiting device limits, and the storage device stores.

The invention provides a fully mechanized coal mining face cold water spraying medium preparation control method, device and system, and relates to the technical field of mine cooling and fluid control, the method is applied to a preparation system comprising a heat exchange device, a water supplementing device and a liquid storage device which are connected through a pipeline, and the primary side of the heat exchange device is connected into a mine centralized refrigerating loop; a secondary side outlet is connected with an atomizing pump of a fully mechanized coal mining face through a liquid storage device. The method comprises the steps that the temperature parameter, the pressure parameter and the liquid level parameter of low-temperature clear water prepared by a heat exchange device and supplied to the atomizing pump are monitored; based on the temperature parameter and the target temperature range, the chilled water flow passing through the primary side of the heat exchange device is adjusted; adjusting the output pressure of the water supplementing device based on the pressure parameter and the target pressure value; and based on the liquid level parameters and the target liquid level range, the flow of low-temperature clear water flowing from the secondary side outlet of the heat exchange device to the liquid storage device is adjusted.

The utility model relates to the technical field of injection water systems, in particular to a common cold point cooling system. The common cold point cooling system comprises a distribution module and a pipeline system; the distribution module comprises a storage tank unit and a first heat exchanger; the pipeline system comprises at least one second heat exchanger and at least one water consumption point; the storage tank unit, the first heat exchanger, the second heat exchanger and the water consumption point are connected in series; the first heat exchanger is used for heating the system, and the second heat exchanger is used for cooling the system. The injection water system is cooled by adopting the cooling effect of the second heat exchanger at the water consumption point in the pipeline system, and a distribution module is not required to be connected into a chilled water interface, so that the input cost and the maintenance cost of the system are reduced.

The invention discloses a method and system for commissioning combination of central air conditioning equipment, and relates to the technical field of energy conservation and emission reduction, the method is based on the principle of minimum energy consumption, and an optimal host startup commissioning combination, an optimal chilled water pump startup combination sequence and an optimal cooling water pump startup combination sequence are calculated respectively; on the basis of the principle that the more the cooling towers are started and the better the cooling towers are started under the condition that water distribution is met, the starting sequence of the cooling towers is calculated. The device and the method can effectively reduce the energy consumption of the central air-conditioning system, improve the utilization rate of energy and achieve the effects of energy conservation and emission reduction.

The utility model relates to an anti-explosion oil gas recovery condensing unit in the field of cryogenic storage equipment. The anti-explosion oil gas recovery condensing unit comprises an anti-explosion water-cooling water chilling unit, an anti-explosion freezing pump, a freezing water tank, a cooling water pump, a cooling water tank, a closed cooling tower or an air cooler and an oil gas heat exchanger. According to the anti-explosion oil-gas recovery condensing unit, through mutual cooperation of the anti-explosion water-cooling water chilling unit, the anti-explosion freezing pump, the freezing water tank, the cooling water pump, the cooling water tank, the closed cooling tower or the air cooler, the oil-gas heat exchangers and the like, circulation of multiple modes of refrigeration and defrosting of the two oil-gas heat exchangers can be achieved, the problem of low-temperature frosting is solved, the refrigeration and heat exchange efficiency is improved, and the energy consumption is reduced. And the stable operation of the system is ensured.

The cooling device comprises a cold storage tank and a climbing mechanism, the climbing mechanism comprises an upper crawling ladder fixedly connected to the left side of the cold storage tank, sliding grooves are formed in the front side and the rear side of the left side of the upper crawling ladder, and sliding blocks are connected to the inner walls of the sliding grooves in a sliding mode; a lower crawling ladder is fixedly connected to the left side of the sliding block, a connecting plate is fixedly connected to the bottom of the right side of the lower crawling ladder, limiting rods are fixedly connected to the front side and the rear side of the bottom of the upper crawling ladder, the bottoms of the limiting rods penetrate through the bottom of the connecting plate and are fixedly connected with a supporting plate, and the right side of the supporting plate is fixedly connected to the left side of the cold storage tank. During use, under the action of the climbing mechanism, the linkage mechanism, the advancing assembly and the driving mechanism, the maintenance and movement convenience of the cold storage tank can be improved, the problem that an existing cold storage tank is difficult to maintain and move due to the fact that no additional climbing and advancing mechanism exists is solved, and the cold storage tank has the advantage of being convenient to use.

This invention discloses a control method and system for automatically increasing or decreasing the number of chiller units in a central air conditioning system, relating to the field of air conditioning energy conservation. The method includes the following steps: In the central air conditioning system, the differential pressure value at the inlet and outlet of the chilled water of each chiller unit is monitored in real time using a differential pressure sensor; when one or more user air conditioning terminals are turned off or on, the opening degree of the electric bypass valve on the supply and return water mains is controlled based on the change between the differential pressure value and the rated differential pressure; when the actual detected differential pressure value is ≤ a first differential pressure set threshold detected when the electric bypass valve opening is at its maximum, or ≥ a second differential pressure set threshold detected when the electric bypass valve opening is at its minimum, the number of chiller units turned on is controlled to increase or decrease. Using this solution, the measured differential pressure and temperature difference between the inlet and outlet of the chilled water of the chiller unit itself can be used as control quantities to directly control the increase or decrease in the number of chiller units turned on, thereby achieving energy-saving control of the central air conditioning system.

The invention discloses a system and method for improving the summer operation performance of a gas-steam combined cycle unit, and the system is characterized in that an expanded economizer is arranged in a waste heat boiler unit of the gas-steam combined cycle unit, and is connected with the generator side of an absorption heat pump unit through a waste heat water circulation pipeline; a waste heat water circulating pump is arranged in the waste heat water circulating pipeline; an air inlet cooling heat exchanger is arranged in an air compressor inlet pipeline of a gas turbine of the gas-steam combined cycle unit, the air inlet cooling heat exchanger is further connected with the evaporator side of the absorption heat pump unit through a chilled water circulation pipeline, and a chilled water circulation pump is arranged in the chilled water circulation pipeline. The condenser side of the absorption heat pump unit is connected with a heat supply network water pipeline, and a heat supply network water circulating pump is arranged in the heat supply network water pipeline. According to the scheme, the summer peak load capacity of the gas-steam combined cycle unit is improved, cascade efficient utilization of energy is achieved, the economical efficiency and the environmental protection property are improved, and collaborative cooling and heating are achieved.

The utility model discloses a frequency conversion centrifugal water chilling unit which comprises a frequency conversion centrifugal compressor, a condenser, an expansion valve, an evaporator, a refrigerant circulation loop, a cooling tower, a data center server, a cooling water circulation loop and a chilled water circulation loop. The cooling water circulation loop comprises a first cooling water circulation loop and a second cooling water circulation loop which are connected between the condenser and the cooling tower in parallel. The chilled water circulation loop comprises a first chilled water circulation loop and a second chilled water circulation loop which are connected between the evaporator and the data center server in parallel. According to the utility model, the two chilled water circulation loops which are connected in parallel and the two cooling water circulation loops which are connected in parallel are adopted, so that the circulation loops can be respectively controlled according to the temperature condition of the data center server in a one-main and one-standby mode, and meanwhile, any circulation loop can be independently overhauled under the condition of no shutdown; and the cold demand of the data center is ensured.

The application discloses a cooling system, a laser device, a control method of the cooling system and related devices, wherein the cooling system is applied to a device containing at least two devices to be cooled, the two devices to be cooled use cooling medium with temperature difference, the cooling system comprises a refrigeration unit and a water cooling unit, the water cooling unit comprises a chilled water pump and a main circulating pipeline, the chilled water pump and the two devices to be cooled are sequentially connected in the main circulating pipeline; wherein the inlet and outlet water ports of the first device to be cooled are connected in parallel with a first bypass pipeline, the first bypass pipeline is provided with a first valve; and / or the inlet and outlet water ports of the second device to be cooled are connected in parallel with a second bypass pipeline, the second bypass pipeline is provided with a second valve. The cooling system realizes the cooling of the two devices to be cooled only through one water cooling unit and one refrigeration unit, and the cooling demand of the two devices to be cooled for chilled water with different temperatures is met by controlling the opening degree of the first valve or the second valve.

The invention belongs to the application field of heating ventilation air conditioning and building energy saving technology, and discloses an optimization control method and system based on a refrigerating system energy consumption model driven by data, and the method comprises the steps: collecting the historical data of a refrigerating system; modeling is carried out according to historical data, and on the premise that the total refrigerating capacity is met, the optimal operation number with one refrigerating main machine, one primary chilled water pump and one cooling water pump as a combination is obtained with the minimum power sum of the refrigerating units and the primary chilled water pumps as the target; the minimum starting number of cooling towers is determined according to the outdoor temperature and the outdoor humidity; under the temperature constraint of a water knockout drum, the temperature constraint of a water collector, the pressure difference constraint of the water collector and the water knockout drum and the minimum starting number constraint of the cooling towers, the power sum of a cooling water pump, a primary chilled water pump, the cooling towers and a refrigerating unit is minimized as a target, and an optimal operation parameter set is obtained through calculation for control optimization. The whole running state of the system can be sensed, and energy consumption is reduced.

This utility model discloses a self-cleaning chilled water machine, belonging to the technical field of chilled water machines. It includes a cabinet, a water tank, a circulating cooling mechanism, and a cleaning mechanism. The water tank is fixedly installed on the left side of the cabinet's bottom via a bracket. An inlet pipe is fixedly installed on the upper left side of the water tank. An outlet pipe is fixedly installed on the lower right side of the water tank, with its right end passing through the right end of the cabinet and extending to the right. The circulating cooling mechanism is installed inside the cabinet. The cleaning mechanism is installed inside the water tank. The cleaning mechanism includes an upward control component, a downward control component, a limiting component, and a moving component. The upward and downward control components have the same structure but different installation positions. Through this method, the outer surface of the spiral tube in the spiral evaporator can be thoroughly cleaned, reducing scale residue in the water tank and ensuring the cooling quality of the water.

This invention provides an inert gas liquefaction device, comprising a purifier, a bag condenser, a refrigeration unit, and a gas cylinder. The purifier purifies the gaseous inert gas, and the purified inert gas is then fed into the liquefaction bag of the bag condenser. A refrigerant from the refrigeration unit circulates through the chilled water chamber of the bag condenser. The refrigerant in the chilled water chamber directly feeds back temperature and pressure to the liquefaction bag, applying pressure to cause the liquefaction bag to contract, transforming the inert gas from a gaseous state to a liquid state within the liquefaction bag. The liquid inert gas is then sent to a storage chamber for storage. This design utilizes the expandable and contractile properties of the liquefaction bag as a liquefaction container. The dual pressure generated by the inlet pressurization and the refrigerant pressurization effectively prevents the inert gas from being drawn away during the vacuuming process, reducing energy consumption.

This utility model discloses a cooling device for a concentrated nitric acid water storage tank, including an acid water tank, a U-shaped pipe, a connecting pipe, and an auxiliary cooling component. This concentrated nitric acid water storage tank cooling device enhances the heat exchange effect between the chilled water and acidic water such as concentrated nitric acid within the S-shaped pipes through two rotating S-shaped pipes, thereby effectively reducing the temperature of the acidic water in the acid water tank, improving the absorption of nitrogen oxides by the acidic water, reducing nitrogen oxide emissions, and alleviating environmental pressure. Simultaneously, the rotation of the first rotating shaft drives the auxiliary cooling component to work, further enhancing the cooling effect of the concentrated nitric acid and other acidic water. When the chilled water system malfunctions, it can be switched to circulating water in a timely manner to avoid significant impact on the device; in winter, when the circulating water temperature is low, the use of chilled water can also be stopped, thereby reducing production costs.

A kind of settling device for ginkgo ketone ester production, including: tank body, tank bottom valve, cooling water system, refrigerated water system, motor, stirring shaft and stirring blade, the bottom end of tank body is connected with tank bottom valve, tank bottom valve is conical structure, tank body is connected with cooling water system and refrigerated water system, motor is located at the top end of tank body, motor is connected with stirring shaft, stirring shaft is connected with stirring blade.Cooling water system includes: cooling water coil, cooling water inlet, cooling water outlet and cooling water control valve;Refrigerated water system includes: refrigerated water coil, refrigerated water inlet, refrigerated water outlet and refrigerated water control valve.The utility model discloses compared with prior art, design double-channel cooling pipeline, i.e.cooling water channel and refrigerated water channel, gradient cooling is realized;The conical structure of tank bottom valve has no dead angle and can effectively avoid the problem of blockage;Cooling water system and refrigerated water system pass through independent control valve, and cooling process can be flexibly adjusted according to actual production process requirement.