A cooling tower plume abatement closed cooling conditioning system

Abstract

This application relates to the field of heat exchange equipment control technology and discloses a closed-loop cooling regulation system for reducing cooling tower mist plumes. The invention obtains temperature and humidity observation values ​​of the central and circumferential edge regions of the exhaust section at the top of the tower based on the center reference of the duct, converts these values ​​to generate humidity information for each exhaust zone at the top of the tower, and encapsulates this information with dry and wet section operating data and the outlet temperature of the closed-loop circulating medium into zone operating data. Through zone humidity comparison processing, a humidity observation state including humidity core intensity, humidity core offset, and humidity core change is generated. A state-space model is used to recursively generate the current humidity core penetration state and the predicted humidity core change for the next cycle. Combined with the outlet temperature of the closed-loop circulating medium, candidate adjustment actions for the fan, dry section air guide, and wet section spray are selected, and adjustment commands are generated. This system can reduce the possibility of white mist rebounding after leaving the tower when the average state at the tower opening is qualified.

Description

Technical Field

[0001] This application relates to the field of heat exchange equipment control technology, and in particular to a closed-loop cooling regulation system for reducing cooling tower mist plumes. Background Technology

[0002] Closed-circuit cooling towers are commonly used in industrial circulating water, process media cooling, and building cold source systems. They dissipate heat through heat exchange between the circulating medium in the coils and the air and spray water inside the tower. To reduce visible mist plumes that appear during low-temperature and high-humidity seasons, a dry-wet hybrid operation structure is often adopted in engineering. This allows the warmer, lower-humidity air generated in the dry cooling section to merge with the higher-humidity air generated in the wet cooling section in the mixing chamber at the top of the tower before being discharged. This reduces the possibility of condensation when the exhaust air enters the external environment. In actual operation, cooling towers are often located on factory roofs, equipment platforms, and the outside of narrow stations, with the air intake direction influenced by the surrounding walls. The airflow is significantly affected by the airflow through the tower body, pipe gallery, and adjacent equipment. For example, during low-load operation at night in winter, the airflow on the windward side increases as the crosswind intensifies. The wet and cold section still maintains some spray load, and the inlet of the tower top fan is somewhat eccentric. Dry air may rise rapidly along the side closest to the fan, while high-humidity air forms a continuous high-humidity channel near the center of the mixing chamber. At this time, although the average temperature and humidity state obtained from the tower inlet measuring point meets the conventional defogging judgment conditions, an eccentric wet nucleus may still remain inside the exhaust section. After leaving the air duct, this eccentric wet nucleus continues to mix with the low-temperature ambient air and undergoes local condensation.

[0003] Existing dry-wet combined cooling tower control typically uses outlet water temperature, ambient temperature and humidity, fan operating status, spray status, and dry-wet section ventilation status as adjustment criteria. It meets the cooling load and mist reduction requirements by changing air volume, spray volume, and dry-wet heat exchange ratio. Some technologies also improve the mixing effect inside the tower through flow guiding components, mixing components, and dry-wet airflow organization structures. Such solutions can improve the overall humidity and heat status of exhaust air under design conditions. However, under the combined effects of single-sided air intake, fan eccentricity, local resistance changes in water collectors, and load fluctuations in the wet cooling section, the average temperature and humidity status at the tower inlet cannot fully characterize the local high-humidity channels within the exhaust cross section. When the control system judges the mist risk based solely on the average exhaust status, it may identify the state where local wet nuclei have not yet fully diffused as the completion of mist elimination, and continue to increase the fan frequency and adjust the dry section ventilation volume, shortening the mixing residence time inside the tower. After leaving the fan duct, the eccentric wet nuclei continue to mix with the low-temperature ambient air and undergo local condensation, thus forming an operational mismatch problem where the tower inlet status is qualified but the white mist rebounds after leaving the tower. Summary of the Invention

[0004] This application proposes a closed-loop cooling regulation system for reducing cooling tower mist plumes, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this application adopts the following technical solution: a closed-loop cooling regulation system for reducing cooling tower mist plumes, comprising: The partition operation data acquisition module acquires the partition operation data of the exhaust section at the top of the tower. The partition operation data is formed by encapsulating the humidity information of the exhaust section at the top of the tower, the dry and wet section operation data, and the outlet temperature of the closed-loop medium. The humidity information of the exhaust section at the top of the tower is obtained by converting the temperature and humidity observation values ​​of the central area and the circumferential edge area according to the center reference of the wind tunnel. The dry and wet section operation data corresponds to the operation boundaries of the fan, the dry section air guide, and the wet section spray. The wet core observation status generation module processes the partition operation data using partitioned humidity comparison processing to generate the wet core observation status, which includes wet core intensity, wet core offset, and wet core change. The wet nucleus penetration state recursive module uses a state-space model to recursively process the cross-cycle changes of the wet nucleus penetration state, wet nucleus observation state, and dry-wet segment operation data of the previous cycle, and generates the current wet nucleus penetration state and the prediction results of the wet nucleus changes in the next cycle. The regulation command generation module obtains candidate regulation actions based on the outlet temperature of the closed-loop medium and its allowable range. The candidate regulation actions correspond to the regulation amounts of the fan, dry section air guide, and wet section spray. The regulation action screening process is used to process the candidate regulation actions and the prediction results of the wet core change in the next cycle to generate regulation commands. When the regulation command is a restricted regulation command, the restricted regulation command limits the fan frequency increment and includes the dry and wet section linkage regulation amount formed by the dry section air guide regulation amount and the wet section spray regulation amount.

[0006] Furthermore, the zonal operation data of the exhaust section at the top of the tower is obtained, including: establishing a fixed section coordinate system for the exhaust section at the top of the tower based on the center of the duct; dividing the exhaust section at the top of the tower into a central region and circumferential edge regions arranged along the circumference according to the fixed section coordinate system; obtaining temperature and humidity observation values ​​for each region within the same control cycle, and configuring region identifiers, control cycle identifiers, and effective statuses for the temperature and humidity observation values; when the central region is effective and the effective circumferential edge regions meet the effective sampling access conditions, the current control cycle is taken as the effective sampling cycle.

[0007] Furthermore, generating zoned operation data includes: within the effective sampling period, using the tower area pressure parameters corresponding to the current control period to convert the temperature and humidity observation values ​​of each effective area into humidity content, and configuring circumferential position markers according to the installation positions corresponding to each circumferential edge area to generate humidity information for the tower top exhaust zone; acquiring dry and wet section operation data and closed-loop circulation medium outlet temperature within the same effective sampling period, and encapsulating the tower top exhaust zone humidity information, dry and wet section operation data, and closed-loop circulation medium outlet temperature into zoned operation data.

[0008] Furthermore, the partitioned operation data is processed using a partitioned humidity comparison process, including: reading the humidity information of the tower top exhaust partition within the same valid sampling period, sorting it from low to high according to the humidity of the circumferential edge region, and selecting the humidity of the circumferential edge region from the top of the sorted and not concentrated in the same circumferential position to form an edge humidity benchmark; using the edge humidity benchmark as the comparison object, determining the humidity increment of the central region and the circumferential edge region relative to the edge humidity benchmark, and generating a wet core intensity based on the humidity increment; and generating a wet core offset based on the humidity increment of the circumferential edge region and its circumferential position identifier.

[0009] Furthermore, generating a wet core observation state includes: when a wet core observation state from the previous valid sampling period exists, and the interval between the current control period and the previous valid sampling period satisfies the continuous change allowable condition formed by the control period length and the sampling period of temperature and humidity observation values, the wet core change is generated based on the wet core intensity, wet core offset, and wet core observation state from the previous valid sampling period in the current control period, and the wet core intensity, wet core offset, and wet core change are bound to the current control period identifier to form a wet core observation state; when a wet core observation state from the previous valid sampling period does not exist, the current control period is marked as the initial observation period, and the wet core change is set to zero; when the interval between the current control period and the previous valid sampling period does not satisfy the continuous change allowable condition, generating the wet core change based on the current control period is prohibited.

[0010] Furthermore, a state-space model is used for recursive processing, including: defining the wet core penetration state of the previous cycle as the wet core penetration state of the previous effective cycle; forming operational driving quantities characterizing the cross-cycle changes of fan suction, dry section air guidance, and wet section spraying based on the dry and wet section operation data of the current control cycle and the previous effective cycle; and recursively correcting the wet core penetration state of the previous effective cycle by using the wet core observation state as the observation correction input and the operational driving quantities as the operation correction input.

[0011] Furthermore, generating the current wet core penetration state and the next cycle wet core change prediction result includes: correcting the wet core penetration state of the previous effective cycle based on the wet core intensity and wet core offset; when the interval between the current control cycle and the previous effective sampling cycle meets the continuous change allowable condition, incorporating the wet core change amount into the recursive correction to form the current wet core penetration state; generating the next cycle wet core change prediction result based on the change direction of the current wet core penetration state relative to the previous effective cycle wet core penetration state and the operating drive amount; when there is at least one of the following situations: the interval between the current control cycle and the previous effective sampling cycle does not meet the continuous change allowable condition, or the dry and wet segment operating data used to form the operating drive amount does not meet the cross-cycle comparison conditions of the same execution object and the same operating caliber, the next cycle wet core change prediction result is marked as a low-confidence prediction result, and the low-confidence prediction result is prohibited from being used as the sole basis for permitting the output fan frequency increment.

[0012] Furthermore, candidate adjustment actions are obtained based on the closed-loop circulating medium outlet temperature and its allowable range, including: comparing the closed-loop circulating medium outlet temperature with the allowable range to obtain a comparison result; generating candidate adjustment actions to improve heat exchange capacity when the closed-loop circulating medium outlet temperature is higher than the upper limit of the allowable range; generating candidate adjustment actions to reduce heat exchange intensity when the closed-loop circulating medium outlet temperature is lower than the lower limit of the allowable range; and generating candidate adjustment actions to limit the fan frequency increment and constrain the wet section spray adjustment amount when the closed-loop circulating medium outlet temperature is within the allowable range. The candidate adjustment actions include the fan frequency increment, the dry section air guide adjustment amount, and the wet section spray adjustment amount, and the candidate adjustment actions do not exceed the operating boundaries of the fan, dry section air guide, and wet section spray.

[0013] Furthermore, a screening process is employed to process candidate adjustment actions and the predicted results of wet core changes in the next cycle. This includes: reading the predicted results of wet core changes in the next cycle; when the predicted results of wet core changes in the next cycle indicate an enhanced wet core penetration state in the next cycle, candidate adjustment actions that solely rely on the fan frequency increment to improve heat exchange capacity are excluded, as are candidate adjustment actions that solely rely on the wet section spray adjustment amount to improve heat exchange capacity, while retaining candidate adjustment actions that include both dry section airflow adjustment amount and wet section spray adjustment amount; when the predicted results of wet core changes in the next cycle are low-confidence prediction results, the adjustment amount of candidate adjustment actions is restricted, and the low-confidence prediction results are prohibited from being used as the sole basis for permitting the output fan frequency increment.

[0014] Furthermore, generating adjustment instructions includes: performing execution object verification, operation boundary verification, and adjustment direction verification on the candidate adjustment actions retained after the adjustment action screening process; converting the candidate adjustment action into an adjustment instruction when the adjustment direction of the candidate adjustment action is consistent with the comparison result, is not excluded by the wet core change prediction result of the next cycle, and passes the execution object verification, operation boundary verification, and adjustment direction verification; generating a restricted adjustment instruction when the adjustment direction of the candidate adjustment action is inconsistent with the comparison result, is excluded by the wet core change prediction result of the next cycle, fails the execution object verification, fails the operation boundary verification, or fails the adjustment direction verification, limiting the fan frequency increment, and outputting the dry section air guiding adjustment amount and the wet section spraying adjustment amount as dry and wet section linkage adjustment amounts.

[0015] The beneficial effects of this invention are as follows: This invention obtains zoned operation data of the exhaust section at the top of the tower based on the center reference of the wind tunnel, converts the temperature and humidity observation values ​​of the central region and the circumferential edge region into moisture content, and combines the dry and wet section operation data and the outlet temperature of the closed-loop medium to form the control input within the same control cycle. This enables the control system to identify local high-humidity channels that are difficult to characterize due to the average temperature and humidity state at the tower opening. At the same time, the invention generates wet core intensity, wet core offset, and wet core change through zoned moisture content comparison processing, and uses a state-space model combined with the cross-cycle change recursion of the dry and wet section operation data to obtain the current wet core penetration state and the prediction result of the wet core change in the next cycle. This ensures that the adjustment actions of the fan, dry section air guide, and wet section spray are constrained not only by the outlet temperature of the closed-loop medium but also by the wet core enhancement trend. This avoids shortening the mixing residence time in the tower by increasing the fan frequency or wet section spray volume when the eccentric wet core has not yet fully diffused, reduces the possibility of white fog rebound after leaving the tower even if the average state at the tower opening is qualified, and improves the stability of fog plume reduction under low temperature and high humidity, single-sided air intake, eccentric fan intake, and fluctuating load in the wet and cold section. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort: Figure 1 This is a system framework diagram of the present invention. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figure 1 As shown, the present invention discloses a closed-loop cooling regulation system for reducing cooling tower mist plumes, comprising: a zoned operation data acquisition module, a wet nucleus observation status generation module, a wet nucleus penetration status recursion module, and a regulation command generation module.

[0019] The partitioned operation data acquisition module acquires the partitioned operation data of the exhaust section at the top of the tower. The partitioned operation data is formed by encapsulating the humidity information of the exhaust section at the top of the tower, the dry and wet section operation data, and the outlet temperature of the closed-loop medium. The humidity information of the exhaust section at the top of the tower is used to characterize the difference in humidity distribution between the central area and the circumferential edge area within the same exhaust section at the top of the tower, and serves as the input for subsequent partitioned humidity comparison processing. The dry and wet section operation data is used to define the operating boundaries of the fan, dry section air guide, and wet section spray within the current control cycle, and serves as the input for subsequent cross-cycle change processing. The outlet temperature of the closed-loop medium is used to characterize the temperature state after heat exchange of the closed-loop medium, and serves as the constraint input for subsequent adjustment action screening. By limiting the humidity information of the exhaust section at the top of the tower, the dry and wet section operation data, and the outlet temperature of the closed-loop medium to the same control cycle, subsequent processing can determine the wet core state at the same time boundary, the same exhaust section at the top of the tower, and the same equipment operating state, avoiding the combination of exhaust states from different cycles with actuator states.

[0020] The cooling regulating controller establishes a fixed cross-sectional coordinate system for the exhaust section at the top of the tower based on the center reference of the duct. The center reference of the duct is determined according to the structural center of the duct, the installation center of the fan, and the measurement results of the sensor installation at the exhaust section at the top of the tower in the cooling tower equipment drawings. The sensor installation measurement results can be formed through installation positioning records, on-site distance measurement records, and sensor coordinate calibration records. After the fixed cross-sectional coordinate system is established, the cooling regulating controller divides the exhaust section at the top of the tower into a central area and circumferentially arranged edge areas. The central area corresponds to the exhaust channel near the center of the duct, and the circumferential edge areas correspond to the exhaust boundaries at different installation positions around the duct. The area number, installation angle, and fixed cross-sectional coordinate system number of each circumferential edge area are written into the same measurement point configuration record to form a circumferential position identifier. This allows the temperature and humidity observation values ​​collected in different control cycles to be compared according to the same spatial reference. The fixed cross-sectional coordinate system does not change with the fan frequency, spray status, and air guiding status, thereby avoiding the drift of area assignment due to changes in control actions.

[0021] Within the same control cycle, the cooling regulation controller acquires temperature and humidity observations for the central region and each circumferential edge region. These observations include dry-bulb temperature and relative humidity. The cooling regulation controller assigns a region identifier, control cycle identifier, sampling time, and valid status to each temperature and humidity observation. The region identifier defines the central region and corresponding circumferential edge region to which the temperature and humidity observation belongs; the control cycle identifier defines the control cycle to which the temperature and humidity observation belongs; the sampling time verifies the temporal correspondence between the temperature and humidity observation and the current control cycle; and the valid status indicates whether the temperature and humidity observation can be used for moisture content conversion. Thus, each temperature and humidity observation has spatial, temporal, and availability attributes, ensuring that subsequent zonal moisture content comparisons will not mistakenly use central region data as circumferential edge region data, nor will they mistakenly use data from the previous cycle as data from the current cycle.

[0022] When the refresh cycles of different sensors are inconsistent, the cooling regulation controller uses the current control cycle as the time boundary and only uses the temperature and humidity observation values ​​whose sampling time falls within the current control cycle and does not exceed the effective holding time of the sensor. The effective holding time of the sensor is formed according to the sampling cycle of the temperature and humidity sensor, the reading cycle of the controller, and the equipment operation procedure. Temperature and humidity observation values ​​whose sampling time is earlier than the current control cycle and exceeds the effective holding time of the sensor are not included in the moisture content conversion of the current control cycle. Through this processing, the temperature and humidity observation values ​​will not be incorrectly used in the current control cycle due to the sensor refresh delay, and the subsequent moisture content observation status will not be formed by expired sampling values.

[0023] The cooling control controller establishes initial valid sampling access conditions based on sensor installation records, zoning layout records of the exhaust section at the top of the tower, sensor error range, and equipment operating procedures. Valid sampling access conditions are used to determine whether the central area is valid, whether the number of valid circumferential edge areas meets the requirements for zoning humidity comparison, and whether the positional coverage relationship of the valid circumferential edge areas can characterize the circumferential differences of the exhaust section at the top of the tower. When historical stable operating records are insufficient, the cooling control controller initiates sampling judgment using the initial valid sampling access conditions. Once the stable operating window meets the minimum continuous cycle requirement, the cooling control controller calibrates the initial valid sampling access conditions based on the stable operating window. The minimum continuous cycle requirement is formed based on the control cycle length, the temperature and humidity sensor sampling cycle, and the closed-loop circulating medium outlet temperature sampling cycle, to ensure that there are continuously comparable sampling records within the stable operating window.

[0024] The stable operation window is formed by a continuous control cycle in which the fan operating value, dry section air guide operating value, wet section spray operating value, and closed-loop medium outlet temperature are all within the allowable fluctuation range. The allowable fluctuation range is derived from the cooling tower operating procedures, sensor error range, and historical stable operation records of the same cooling tower. The stable operation window is only used to calibrate the availability of effective sampling access conditions and alternative tower area air pressure parameters, and is not used as a direct calculation object for wet core intensity. Through this limitation, the stable operation window only undertakes the functions of sampling access and auxiliary parameter calibration, and is not confused with the calculation objects of subsequent wet core intensity, wet core offset, and wet core change.

[0025] When the central region is valid and the valid circumferential edge region meets the valid sampling admission conditions, the cooling regulation controller determines the current control cycle as the valid sampling cycle. When the current control cycle does not meet the valid sampling admission conditions, the cooling regulation controller generates a data shortage flag and prohibits updating the wet nucleus observation status based on the current control cycle. If the wet nucleus observation status of the previous valid sampling cycle exists, the wet nucleus observation status of the previous valid sampling cycle is retained as the input for subsequent recursive processing. If the wet nucleus observation status of the previous valid sampling cycle does not exist, the sampling limitation status is output, and the recursive processing of the current control cycle is stopped. This diversion mechanism ensures that the missing measurement cycle will not be misjudged as the normal wet nucleus status, and will not directly trigger subsequent regulation actions due to local sensor failure.

[0026] Within the effective sampling period, the cooling regulation controller acquires the tower area air pressure parameters for the current control period. These parameters are derived from the air pressure data collected in the area where the cooling tower is located, corrected for installation height, and use the same control period identifier as the temperature and humidity observations. The cooling regulation controller converts the dry-bulb temperature, relative humidity, and tower area air pressure parameters of the effective area into moisture content according to the relationship between the wet and dry air states. During the conversion process, the corresponding saturated vapor pressure is first obtained based on the dry-bulb temperature, then the partial pressure of water vapor is obtained based on the relative humidity, and finally, the water vapor content per unit of dry air is obtained by combining the tower area air pressure parameters. This generates the moisture content of the central area and the moisture content of the circumferential edge areas, so that the temperature and humidity observations of different areas are converted into comparable moisture content under the same dimension. The tower area air pressure parameters serve as auxiliary parameters for moisture content conversion and are not used as direct determination quantities for the moisture core observation state.

[0027] When the tower area pressure parameter for the current control cycle is missing, the cooling regulation controller calls the tower area pressure parameter from the most recent stable operating window as a substitute tower area pressure parameter and configures a parameter substitution flag. The substitute tower area pressure parameter is only used as a temporary input for the moisture content conversion in the current control cycle. It does not overwrite the pressure acquisition record of the current control cycle, is not written into the update record of the stable operating window, and is not used as the calibration basis for the effective sampling admission condition. When there is no available substitute tower area pressure parameter, the cooling regulation controller generates a data shortage flag and prohibits updating the moisture nucleus observation status based on the current control cycle. The partition operation data with the parameter substitution flag can enter the subsequent moisture nucleus observation status generation process, but the parameter substitution flag serves as a reliable boundary input, enabling subsequent processing to identify the existence of auxiliary parameter substitution for the moisture content in this cycle.

[0028] The cooling regulation controller generates humidity information for the exhaust zone at the top of the tower by combining the humidity content of the central area, the humidity content of the circumferential edge area, the area identifier, the control cycle identifier, the sampling time, the effective status, and the circumferential position identifier. The humidity information for the exhaust zone at the top of the tower does not use the average temperature and humidity at the tower opening as a substitute, nor does it use the average value of the entire tower as the humidity content of a local area. The humidity content of the central area is used to characterize the humidity state of the humid air channel near the center of the air duct, the humidity content of the circumferential edge area is used to characterize the humidity state at the circumferential boundary of the air duct, and the circumferential position identifier is used to define the spatial position of the circumferential edge area relative to the center of the air duct. Through this processing, subsequent comparisons of the humidity content of the zones can distinguish between the high humidity state in the central area, the high humidity state in the circumferential edge area, and the humidity differences between different circumferential positions.

[0029] The cooling regulation controller further acquires the dry and wet section operating data and the closed-loop medium outlet temperature within the same effective sampling period. The dry and wet section operating data correspond to the operating boundaries of the fan, dry section air guide, and wet section spray, including the fan operating value and allowable adjustment range, the dry section air guide operating value and allowable adjustment range, and the wet section spray operating value and allowable adjustment range. The fan operating value is used to characterize the exhaust driving force state, the dry section air guide operating value is used to characterize the boundary state of dry air participating in mixing, and the wet section spray operating value is used to characterize the boundary state of humid air generation intensity. The closed-loop medium outlet temperature and the humidity information of the exhaust zone at the top of the tower are identified by the same control period to limit subsequent adjustment actions to meet the closed-loop cooling requirements. If the sampling time of the closed-loop medium outlet temperature does not fall within the current control period and exceeds the effective holding time, the current control period is not encapsulated as normal zone operating data, and the sampling limited status is output.

[0030] The cooling regulation controller encapsulates the moisture content information of the exhaust zone at the top of the tower, the dry and wet section operating data, and the closed-loop medium outlet temperature into zone operating data only when the current control cycle is determined to be a valid sampling cycle, the moisture content conversion is completed, the dry and wet section operating data is valid, and the closed-loop medium outlet temperature is valid. The zone operating data is written with the area identifier, control cycle identifier, sampling time, valid status, circumferential position identifier, and parameter substitution mark. The encapsulated zone operating data is output by the zone operating data acquisition module and enters the wet core observation status generation module to generate the wet core observation status. Data that is not determined to be a valid sampling cycle, data that lacks area affiliation, data that exceeds the valid holding time, and data that lacks closed-loop medium outlet temperature constraints are not output as normal zone operating data.

[0031] In a specific application scenario, the closed-circuit cooling tower operates under low temperature and high humidity conditions in winter. The average temperature and humidity at the tower inlet are within the operating reference range formed by the cooling tower operating procedures and historical stable operating windows. Due to the decrease in the spray volume of the wet section, the enhanced air intake on the windward side, the larger opening of the unilateral air guide, and the eccentricity of the fan intake, the humidity content in the central area of ​​the exhaust section at the top of the tower may be consistently higher than that in the circumferential edge area. When using the average temperature and humidity at the tower inlet, this local high humidity channel is easily masked by the average value and mixes with the low temperature ambient air after leaving the tower, forming a local white fog rebound. This implementation method uses a fixed cross-sectional coordinate system, effective sampling in the same period, auxiliary conversion of tower area air pressure parameters, and circumferential... Location identification and operational boundary encapsulation transform the humidity content of the central area, the humidity content of the circumferential edge area, and their spatial relationship into partitioned operational data that can be called upon by subsequent processing. This enables the subsequent wet nucleus observation status generation module to generate wet nucleus observation status under the same spatial reference, the same control cycle, and the same dimension. This processing does not rely on the average temperature and humidity at the tower inlet to determine the plume reduction status. Instead, it separates the local high humidity channel from the average exhaust status and encapsulates it synchronously with the operational boundaries of the fan, dry section air guide, wet section spray, and closed-loop medium outlet temperature. This provides a consistent data foundation in terms of object, time, and space for subsequent wet nucleus penetration judgment and adjustment action screening.

[0032] In the wet core observation status generation module, the partitioned humidity comparison processing is used to process the partitioned operation data. Specifically, the cooling regulation controller reads the partitioned operation data output by the partitioned operation data acquisition module and extracts the humidity information of the tower top exhaust partition from the partitioned operation data. The humidity information of the tower top exhaust partition includes the humidity of the central area, the humidity of the circumferential edge area, the area identifier, the control cycle identifier, the effective status, the circumferential position identifier, and the parameter substitution mark. The cooling regulation controller only performs partitioned humidity comparison processing on the humidity of the central area and the humidity of the circumferential edge area under the same control cycle identifier and with an effective status. When the parameter substitution mark exists, the cooling regulation controller includes the upper limit of the error corresponding to the gas pressure parameter of the substitution tower area into the humidity distinguishable boundary when forming the humidity distinguishable boundary, without changing the spatial assignment of the central area and the circumferential edge area.

[0033] The processing objective of the wet core observation status generation module is to convert the partition operation data, which has already been spatially assigned, periodically assigned, and converted to moisture content by the partition operation data acquisition module, into a wet core observation status that can be called upon by the wet core penetration status recursion module. The wet core observation status is jointly formed by the degree of moisture prominence in the central area within the same tower top exhaust section, the difference in moisture distribution in the circumferential edge areas, and the relationship between changes in adjacent effective sampling periods. Under low temperature and high humidity conditions, closed cooling towers may have an operating state where the average temperature and humidity at the tower opening are within the operating reference range, but a local high moisture content channel is formed in the central area of ​​the tower top exhaust section. When the average temperature and humidity at the tower opening are used as the basis for judgment, subsequent adjustment actions are difficult to identify the risk of wet core penetration.

[0034] When the humidity content in the central region is absent, the cooling regulation controller does not generate the humidity core observation status for the current control cycle and maintains the insufficient data mark output by the partition operation data acquisition module. When the effective circumferential edge region does not meet the effective sampling admission conditions formed by the partition operation data acquisition module, the cooling regulation controller does not use the remaining circumferential edge region to estimate the whole-cycle humidity distribution and does not generate the humidity core intensity, humidity core offset, and humidity core change for the current control cycle. This diversion is used to limit the comparison object of the humidity core observation status generation module to come from the effective partition humidity content within the same effective sampling cycle, preventing local missing measurement status from being interpreted as true circumferential humidity unevenness.

[0035] The cooling control system first establishes an edge humidity baseline. This baseline characterizes the synchronous baseline humidity state of the circumferential edge region of the tower top exhaust section within the same control cycle and serves as a comparison object for identifying humidity increments in the central region and local circumferential locations. The edge humidity baseline does not use the average temperature and humidity at the tower inlet, nor does it use the arithmetic mean of humidity in all circumferential edge regions. Specifically, the cooling control system sorts the effective circumferential edge regions from low to high humidity to form candidate circumferential edge regions. Then, it performs circumferential position verification on the candidate circumferential edge regions based on their circumferential position identifiers, selecting those regions that are ranked higher and not yet clustered. Among the candidate circumferential edge regions located at the same circumferential position, the humidity content of the circumferential edge region is selected to form the edge humidity reference. The candidate circumferential edge regions ranked higher are used to characterize the edge exhaust state that is relatively unaffected by local high humidity channels. The circumferential position marker is used to exclude low humidity measurement points concentrated on the same side to prevent a single low humidity region from being mistakenly used as the whole circumferential edge reference. If the candidate circumferential edge regions ranked higher are all concentrated at the same circumferential position, or if the number of candidate circumferential edge regions is insufficient to meet the circumferential position verification requirements, the cooling regulation controller will not form the edge humidity reference for the current control cycle and will output a sampling limited flag.

[0036] In one implementation, the edge moisture content benchmark is formed using a graded contribution processing method. The cooling regulation controller arranges the circumferential edge regions that meet the circumferential position dispersion requirements according to their moisture content from low to high, and configures a monotonically decreasing initial contribution relationship based on the number and sorting position of the circumferential edge regions participating in the formation of the edge moisture content benchmark. Subsequently, the initial contribution relationship is normalized so that the sum of the contribution relationships corresponding to each selected circumferential edge region is one. Then, the moisture content of each selected circumferential edge region is multiplied by its corresponding normalized contribution relationship and summed to form the edge moisture content benchmark. The unified contribution relationship is a dimensionless quantity with a value range of zero to one. It is only used to form the edge moisture content benchmark and is not used as the directional input of the moisture core offset. The circumferential edge region with lower moisture content has a higher contribution to the edge moisture content benchmark, while the circumferential edge region with higher moisture content but still selected has a lower contribution. This process is used to reduce the lifting effect on the edge moisture content benchmark when the offset moisture core has already affected a certain circumferential edge region. After the edge moisture content benchmark is formed, it enters the next processing stage to determine the moisture content increment of the central region and the circumferential edge region relative to the edge reference at the same time.

[0037] The cooling control controller then generates a moisture content increment, which represents the positive moisture content difference between the central region and the circumferential edge region relative to the edge moisture content reference. To prevent sensor errors, tower area pressure parameter substitution, and moisture content conversion errors from being mistakenly identified as moisture cores, the cooling control controller generates a distinguishable moisture content boundary. This boundary is jointly formed by the moisture content conversion results from the temperature and humidity sensor error range, the tower area pressure parameter error range, and the humid air state relationship. The unit is consistent with the moisture content, and the value is greater than or equal to zero. The cooling control controller substitutes the upper limit of dry-bulb temperature error, the upper limit of relative humidity error, and the upper limit of tower area pressure parameter error into the humid air state relationship to obtain the upper limit of moisture content conversion deviation. This upper limit of moisture content conversion deviation is used as the distinguishable moisture content boundary. When parameter substitution markers exist in the partition operation data acquisition module, the cooling control controller includes the upper limit of the error corresponding to the tower area pressure parameter in the distinguishable moisture content boundary. The distinguishable moisture content boundary is used to exclude moisture content differences that cannot be distinguished by sensor errors, tower area pressure parameter errors, and conversion errors, and is not used as a direct determination object for moisture core intensity.

[0038] The moisture increment in the central region is formed by the positive difference between the moisture content in the central region and the moisture content benchmark at the edge, minus the distinguishable moisture boundary. The moisture increment in the circumferential edge regions is formed by the positive difference between the moisture content in each circumferential edge region and the moisture content benchmark at the edge, minus the distinguishable moisture boundary. Differences that do not exceed zero after the minus are not included in the generation of the moisture core observation state. Through this process, only moisture differences that exceed the range that can be explained by measurement error and conversion error are considered as valid evidence of a local high moisture channel.

[0039] The cooling regulation controller generates a wet core intensity based on the moisture content increment in the central region and the moisture content increment in the circumferential edge region. The wet core intensity characterizes the overall prominence of a local high-humidity channel within the same exhaust cross-section at the top of the tower relative to the edge moisture reference. The wet core intensity does not directly use the moisture content of the central region or the average temperature and humidity at the tower inlet; instead, it is formed by the moisture content increment exceeding the distinguishable moisture content boundary. When generating the wet core intensity, the cooling regulation controller weights and synthesizes the moisture content increments of each region according to the area ratio of the central region and the effective circumferential edge region in the exhaust cross-section at the top of the tower, obtaining the cross-sectional moisture content increment. Subsequently, a dimensionless conversion is performed on the cross-sectional moisture content increment using a positive reference value formed by the edge moisture content reference and the distinguishable moisture content boundary, yielding the relative moisture content increment. When the positive reference value is less than the lower limit of the moisture content conversion resolution, the lower limit of the moisture content conversion resolution is used as the reference value. Next, the relative moisture increment is compared with the upper limit reference value. When the relative moisture increment reaches or exceeds the upper limit reference value, the wet core intensity corresponding to the upper limit is output. When the relative moisture increment does not reach the upper limit reference value, a dimensionless wet core intensity of zero to one is formed according to the ratio of the relative moisture increment to the upper limit reference value. The upper limit reference value is jointly formed by the stable operation window, equipment operation procedures and historical high humidity stable operation records in the partition operation data acquisition module. When the stable operation window and historical high humidity stable operation records are insufficient, the initial upper limit is formed by the equipment operation procedures, sensor error range and stable operation records of the same type of cooling tower. After the stable operation window meets the minimum continuous cycle requirement, calibration is performed. When the moisture increment in the central area and the moisture increment in all circumferential edge areas do not exceed the distinguishable moisture boundary, the cooling regulation controller determines the wet core intensity to be zero.

[0040] The cooling regulation controller generates a wet core offset based on the moisture content increment of the circumferential edge region and its circumferential position marker. This wet core offset characterizes the degree of deviation of the local high-humidity channel from the central reference of the duct. Its value ranges from zero to one and serves as the observation input for the wet core penetration state recursive module to identify the spatial deviation state of the wet core. The central region, located near the center of the duct, participates in the formation of wet core intensity through its moisture content increment, but does not contribute to the circumferential offset. The circumferential edge regions, located at different circumferential positions, have moisture content increments used to determine the degree of wet core offset towards the circumferential edge regions. The cooling regulation controller converts each effective circumferential edge region into a fixed cross-sectional coordinate system according to the installation angle corresponding to the circumferential position marker. The unit direction vector is calculated, and the offset contribution is formed according to the proportion of the moisture content increment of each circumferential edge region to the total moisture content increment of the effective circumferential edge region. Then, the unit direction vector is synthesized according to the offset contribution, and the magnitude of the synthesized vector is used as the moisture core offset. When the total moisture content increment of the effective circumferential edge region is zero, the cooling regulation controller determines the moisture core offset to be zero. When multiple relative circumferential edge regions have similar moisture content increments at the same time, the offset contributions cancel each other out, and the moisture core offset decreases. When the moisture content increment of a certain side of the circumferential edge region is significantly dominant, the moisture core offset increases. This process enables the moisture core offset to reflect whether the moisture core is biased to one side, and avoids misjudging symmetrical humidification as unilateral offset.

[0041] After the wet core intensity and wet core offset are formed, the cooling regulation controller further determines whether the wet core change can be generated. The wet core change is used to characterize the enhancement, weakening and offset of the local high humidity channel between adjacent effective sampling periods. The value range is from negative one to one. The previous effective sampling period refers to the most recent control period before the current control period that has formed the wet core observation state and has not been marked as sampling restricted. The wet core change does not use data from future periods, offline verification results, or feedback results after subsequent regulation actions are executed.

[0042] If a wet nucleus observation state from the previous valid sampling period exists, and the interval between the current control period and the previous valid sampling period satisfies the continuous change allowable condition formed by the control period length, the sampling period of temperature and humidity observations, and the effective holding time, the cooling control controller generates the wet nucleus change amount based on the wet nucleus intensity, wet nucleus offset, and the wet nucleus observation state from the previous valid sampling period. The continuous change allowable condition is expressed in terms of the number of control periods, used to determine whether the current control period can participate in the generation of the wet nucleus change amount. If the wet nucleus intensity and wet nucleus offset of the current control period do not change, and there is no wet nucleus observation state from the previous valid sampling period, the cooling control controller marks the current control period as the initial observation. The cooling control controller prohibits the generation of wet core change based on the current control cycle and outputs a sign indicating that the change is limited when the interval between the current control cycle and the previous effective sampling cycle does not meet the continuous change allowable condition. In this state, the wet core intensity and wet core offset of the current control cycle can be output as limited observation information to the wet core penetration state recursion module, but they are not bound with the wet core change to form a complete wet core observation state. The limited observation information is only used for state maintenance or low confidence verification in the wet core penetration state recursion module, and is not used to form a high confidence judgment of the wet core enhancement trend. This processing is used to prevent the cumulative difference after a long period of missing measurements from being mistaken for single-cycle wet core enhancement.

[0043] When the wet nucleus change is generated, the cooling regulation controller calculates the intensity difference between the wet nucleus intensity of the current control cycle and the wet nucleus intensity of the previous effective sampling cycle, as well as the offset difference between the wet nucleus offset of the current control cycle and the wet nucleus offset of the previous effective sampling cycle. Both the intensity difference and the offset difference are dimensionless. After deducting the wet nucleus distinguishable change boundary, the intensity difference and the offset difference generate a wet nucleus change greater than zero when the positive change is dominant, and a wet nucleus change less than zero when the negative change is dominant. The wet nucleus change is set to zero when it does not exceed the wet nucleus distinguishable change boundary.

[0044] The formation of wet core variation is based on wet core intensity variation, wet core offset variation, and the wet core resolvable variation boundary. The wet core resolvable variation boundary is a dimensionless boundary with a value greater than zero, used to exclude natural fluctuations smaller than the resolvable variation level. When the stable operation window meets the minimum continuous period requirement, the wet core resolvable variation boundary is jointly formed by the wet core intensity variation, wet core offset variation, and the wet core intensity resolution obtained by converting the wet core resolvable boundary through the wet core intensity formation relationship within the stable operation window. The minimum continuous period requirement is expressed by the number of control cycles, formed by the control cycle length, temperature and humidity observation sampling period, effective holding time, and the continuity requirement of the stable operation window. When the stable operation window is insufficient, the cooling regulation controller adjusts the settings based on the sensor error range, zoned recording, and other parameters. The initial boundary is formed by the preparation of the operating procedures and stable operation records of similar cooling towers. Specifically, the distinguishable boundary of moisture content is substituted into the moisture core intensity formation relationship to obtain the initial moisture core intensity resolution, and the circumferential position resolution interval is substituted into the moisture core offset formation relationship to obtain the initial moisture core offset resolution. The initial moisture core intensity resolution and the initial moisture core offset resolution are then used to form the distinguishable change boundary of the moisture core. When the parameter substitution mark exists, the cooling regulation controller increases the distinguishable change boundary of the moisture core so that the uncertainty of moisture content introduced by the gas pressure parameter of the substitution tower area is not judged as a moisture core enhancement trend. A moisture core change greater than zero is used to characterize the moisture core enhancement and offset aggravation trend as dominant, a moisture core change less than zero is used to characterize the moisture core weakening and offset decline trend as dominant, and a moisture core change equal to zero is used to characterize that the current change has not exceeded the distinguishable change boundary.

[0045] The distinguishable boundary of humidity, the allowable condition for continuous change, the minimum continuous period requirement, and the distinguishable change boundary of the wet nucleus in the wet nucleus observation status generation module share the same calibration basis. The calibration basis includes the stable operation window, temperature and humidity sensor error range, tower area pressure parameter error range, temperature and humidity observation sampling period, control period length, fixed cross-section coordinate system, zonal layout record, and equipment operation procedures in the zonal operation data acquisition module. The distinguishable boundary of humidity is used to eliminate indistinguishable differences at the level of humidity conversion; the allowable condition for continuous change is used to control the generation access of the wet nucleus change; the minimum continuous period requirement is used to limit whether the stable operation window can be used as the calibration basis for the change boundary; the distinguishable change boundary of the wet nucleus is used to eliminate natural fluctuations at the level of wet nucleus intensity and wet nucleus offset. Each parameter plays a different control role and is not interchangeable.

[0046] When the conditions for generating the wet core change are met in the current control cycle, the cooling regulation controller binds the wet core intensity, wet core offset, and wet core change to the current control cycle identifier to form the wet core observation state for the current control cycle. When the current control cycle is marked as the initial observation cycle, the wet core intensity, wet core offset, and the wet core change after being zeroed are bound to the current control cycle identifier to form the initial wet core observation state. The wet core intensity in the wet core observation state comes from the effective moisture content increment of the central region and the circumferential edge region relative to the edge moisture content reference. The wet core offset comes from the moisture content increment of the circumferential edge region and the circumferential position identifier. The wet core change comes from the continuous change judgment between the wet core intensity and wet core offset of the current control cycle and the wet core observation state of the previous effective sampling cycle. The wet core intensity, wet core offset, and wet core change represent the amplitude, spatial deviation, and temporal change, respectively, and are not interchangeable.

[0047] After the wet core observation state is formed, the cooling regulation controller outputs it to the wet core penetration state recursion module. The wet core penetration state recursion module uses the wet core observation state as the current observation input and combines it with the wet core penetration state of the previous cycle and the cross-cycle changes of the dry and wet segment operation data to recursively generate the current wet core penetration state and the wet core change prediction results for the next cycle. The wet core observation state with parameter substitution marker can be used as the low-confidence observation input of the wet core penetration state recursion module, but it must not be used to update the stable operation window, must not be used as the baseline sample of the wet core observation state, and must not be used alone to form a high-confidence judgment of the wet core enhancement trend. Under the condition of limited change continuity, the cooling regulation controller outputs the wet core intensity, wet core offset and the limited change continuity marker, and prohibits the formation of the wet core change amount based on the current control cycle. Under the condition of limited sampling, the cooling regulation controller does not output the wet core observation state of the current control cycle, but only outputs the limited sampling marker to the wet core penetration state recursion module.

[0048] In a specific application scenario, the closed-circuit cooling tower operates under low temperature and high humidity conditions in winter. When the closed-circuit cooling tower located on the factory roof operates at low load at night, the spray volume in the wet section decreases, but the humid air inside the tower still rises along the direction of the fan intake. When the windward air intake is enhanced, the single-sided air guide opening is too large, and the local resistance of the water collector changes, the humidity content in the central area of ​​the exhaust section at the top of the tower may be consistently higher than that in the circumferential edge areas. At this time, the average temperature and humidity at the tower inlet may still be within the operating reference range. Controlling the average temperature and humidity at the tower inlet makes it difficult to identify localized high-humidity channels. With this implementation method, the cooling regulation controller first targets the circumferential edges where humidity is low and dispersed in a circular pattern. The edge region forms an edge moisture reference. The moisture increment of the central region and the circumferential edge region relative to this edge moisture reference is then converted into moisture core intensity. The moisture increment of the circumferential edge region and the circumferential position marker are used to form moisture core offset. When the moisture core intensity increases and the moisture core offset increases during a continuous control cycle, the moisture core change shows a positive change. The subsequent moisture core penetration state recursive module combines the cross-cycle changes of dry and wet section operation data to recursively deduce the moisture core penetration state. Thus, the local high moisture channel enters the subsequent recursive processing in the form of moisture core intensity, moisture core offset, and moisture core change. The trend of moisture core shifting to one side can be retained in the subsequent prediction and adjustment action screening process.

[0049] In the wet core penetration state recursive module, the cooling regulation controller uses a state-space model to recursively process the cross-cycle changes of the wet core penetration state, wet core observation state, and dry and wet section operation data of the previous cycle, generating the current wet core penetration state and the predicted wet core change results for the next cycle. This step is used to establish a time continuity relationship between the moisture distribution results of the exhaust section at the top of the tower obtained by the wet core observation state generation module and the operation changes of the fan, dry section air guide, and wet section spray, so that the wet core observation results within a single control cycle are converted into continuous state results that can be used by the regulation command generation module to screen candidate regulation actions.

[0050] The cooling controller reads the wet core penetration state of the previous cycle and limits it to the wet core penetration state of the previous valid cycle. The wet core penetration state of the previous valid cycle refers to the wet core penetration state that was formed before the current control cycle, without sampling restriction flags, without operation change restriction flags, and is allowed to be retained. When there are multiple historical cycles before the current control cycle, the cooling controller selects the wet core penetration state that is closest to the current control cycle and meets the valid conditions as the wet core penetration state of the previous valid cycle. When there is no wet core penetration state of the previous valid cycle before the current control cycle, the cooling controller marks the current control cycle as the recursive initial cycle and establishes the initial wet core penetration state based on the wet core observation state of the current control cycle. When the current control cycle does not obtain a wet core observation state but only obtains a sampling restriction flag, the cooling controller outputs a penetration state restriction flag and does not generate a highly reliable current wet core penetration state.

[0051] The cooling regulation controller reads the wet core observation status generated by the wet core observation status generation module. The wet core observation status includes wet core intensity, wet core offset, and wet core change, and corresponds to the current control cycle identifier. The wet core intensity is used to correct the amplitude of the wet core penetration status, the wet core offset is used to correct the spatial offset effect of the wet core penetration status, and the wet core change is used to correct the continuous change trend of the wet core penetration status. The cooling regulation controller only uses the wet core observation status consistent with the current control cycle identifier to perform recursive processing. It does not use the observation results of subsequent control cycles to correct the recursive results of the current control cycle, nor does it use offline verification results to rewrite the online recursive results of the current control cycle.

[0052] The continuous change allowance condition is used to determine whether the wet core change can be included in the recursive correction. The continuous change allowance condition is formed by the control cycle length, the temperature and humidity observation sampling period, and the effective holding time. The units of the control cycle length, the temperature and humidity observation sampling period, and the effective holding time are seconds or minutes. The continuous change allowance condition is not used as the admission condition for wet core intensity and wet core offset. It is only used to determine whether there is a continuous trend connection between adjacent effective cycles. When the current control cycle obtains the wet core observation state, but the wet core observation state does not meet the continuous change allowance condition, the cooling regulation controller allows the wet core intensity and wet core offset to participate in the recursive correction as restricted observation inputs. It prohibits the inclusion of the wet core change in the enhanced trend judgment and marks the recursive result as a restricted recursive result. The restricted recursive result shall not be output to the regulation command generation module as a high-confidence state.

[0053] The cooling regulation controller reads the dry and wet section operating data of the current control cycle and the previous effective cycle, and generates operating drive quantities based on the operating changes between the two cycles. The cooling regulation controller only performs cross-cycle comparisons of dry and wet section operating data under the same execution object and the same operating caliber. The fan frequency of the current control cycle is compared with the fan frequency of the previous effective cycle, the dry section air guide opening of the current control cycle is compared with the dry section air guide opening of the previous effective cycle, and the wet section spray volume of the current control cycle is compared with the wet section spray volume of the previous effective cycle. Operating values ​​between different fan numbers, different air guide actuator numbers, and different spray branch numbers must not be compared with each other; fan frequency, fan power, and fan current must not be mixed and used as the same operating caliber.

[0054] When generating the operating drive quantity, the cooling regulation controller converts the cross-cycle operating changes of the fan, dry section air guide, and wet section spray into dimensionless operating changes according to the allowable adjustment range of each actuator and the equipment calibration records. Then, it multiplies each dimensionless operating change by its corresponding contribution relationship and sums them up. The summation result is then limited to -1 to form the operating drive quantity. The operating drive quantity is a dimensionless quantity with a value range of -1 to 1. A positive value indicates that the operating change in the dry and wet sections points in the direction of enhanced wet core penetration, a negative value indicates that the operating change in the dry and wet sections points in the direction of weakened wet core penetration, and a zero value indicates that the operating change does not exceed the resolvable range of the operating change. The resolvable range of the operating change is jointly formed by the actuator calibration records, the accuracy of the operating value acquisition, the control cycle length, and the actuator response time. It is used to exclude actuator sampling jitter and short-term response lag and is not directly used as the judgment condition for the output of the regulation command by the regulation command generation module.

[0055] The contribution relationship between the fan, dry section air guide, and wet section spray is a dimensionless ratio, with individual values ​​ranging from zero to one. After normalization, it is used to form the operating drive quantity. The contribution relationship is only used to form the operating drive quantity and is not directly used as the judgment condition for the output of the control command generation module. The contribution relationship is formed by the cooling tower operation procedure, the actuator calibration record, the stable operation window, and the historical high humidity operation record. The length of the stable operation window is formed by the control cycle length, the temperature and humidity observation sampling cycle, the closed-loop medium outlet temperature response time, and the actuator response time. Its dimension is minutes or the number of effective control cycles.

[0056] The stable operation window is used to form the contribution relationship of the operation driving quantity, the distinguishable range of operation changes, the upper limit reference state of the current wet nucleus penetration state, and the distinguishable prediction boundary. The contribution relationship of the operation driving quantity is used to limit the relative effect of the operation changes of different actuators on the recursive correction; the distinguishable range of operation changes is used to exclude indistinguishable changes in the operation values ​​of actuators; the upper limit reference state is used to limit the current wet nucleus penetration state; the distinguishable prediction boundary is used to exclude indistinguishable trends in the wet nucleus change prediction results of the next cycle. The above parameters share the same calibration basis, but act on different processing links and do not replace each other.

[0057] When the number of effective cycles within the stable operation window is insufficient to cover the effective change records of the fan, dry section air guide, and wet section spray within the allowable adjustment range, the cooling regulation controller establishes an initial contribution relationship, an initial distinguishable range of operational changes, an initial upper limit reference state, and an initial distinguishable prediction boundary using the equipment operation procedures, stable operation records of similar cooling towers, and the factory response range of the actuator. The above initial values ​​are only used for recursive startup and do not enter the stable operation window update chain. The current wet core penetration state and the prediction result of the wet core change in the next cycle formed based on the initial values ​​are marked as the initial calibration state. The initial calibration state is only used as the restricted state constraint input of the regulation command generation module and is not used as a separate permission basis for the output fan frequency increment.

[0058] The directional relationship between enhanced fan suction, enhanced wet section spraying, and enhanced dry section airflow on the wet nucleus penetration state needs to be used to form the operating drive quantity when the operating direction verification is passed. The operating direction verification is formed by the changes in the observed wet nucleus state, the changes in the dry and wet section operating data, and the actuator response records within the stable operating window. When the operating direction verification is passed, enhanced fan suction and enhanced wet section spraying contribute to the direction of enhanced wet nucleus penetration, and enhanced dry section airflow contributes to the direction of weakened wet nucleus penetration. When the operating direction verification is not passed, the cooling regulation controller marks the operating direction as restricted, the operating drive quantity does not participate in the direction determination of the wet nucleus change prediction result in the next cycle, and the wet nucleus change prediction result in the next cycle is marked as a low-confidence prediction result.

[0059] When the dry and wet segment operating data used to form the operating driving force do not meet the cross-cycle comparison conditions of the same execution object and the same operating caliber, the cooling regulation controller does not form an effective operating driving force and marks the current control cycle as an operating change restricted cycle. During the operating change restricted cycle, the current wet core penetration state must not be output to the regulation command generation module as a high-confidence state. When it is necessary to maintain control continuity, the cooling regulation controller only performs restricted state maintenance processing based on the wet core penetration state of the previous effective cycle and marks the wet core change prediction result of the next cycle as a low-confidence prediction result.

[0060] In this step, the state-space model is executed in the order of state inheritance, observation correction, operational correction, and limit output. The cooling regulator uses the wet nucleus penetration state of the previous effective cycle as the basis for state inheritance. First, it performs observation correction on the wet nucleus penetration state of the previous effective cycle based on the wet nucleus intensity and wet nucleus offset. When the wet nucleus observation state meets the continuous change allowable condition, the wet nucleus change is included in the observation correction. When the wet nucleus observation state does not meet the continuous change allowable condition, the wet nucleus change is not included in the observation correction. After completing the observation correction, the cooling regulator uses the operational driving quantity to perform operational correction on the observed corrected state to obtain the recursive correction result.

[0061] In the recursive processing, the observation correction quantity is formed by the wet core intensity, wet core offset, and wet core change quantity that meets the continuous change allowable condition; the operation correction quantity is formed by the operation driving quantity. The cooling regulation controller combines the wet core penetration state of the previous effective cycle, the observation correction quantity, and the operation correction quantity into the recursive correction result. The wet core intensity, wet core offset, and current wet core penetration state are all dimensionless quantities from zero to one, and the wet core change quantity and operation driving quantity are all dimensionless quantities from negative one to one. After each quantity is dimensionlessized, it participates in the recursion and is not directly added to the moisture content, temperature, fan frequency, air guide opening, and spray volume.

[0062] When generating the recursive correction result, the cooling regulation controller first combines the wet core intensity, wet core offset, and wet core change that meets the continuous change allowable condition into an observation correction quantity according to the observation contribution relationship formed by the stable operation window; then, according to the operation contribution relationship formed by the stable operation window, it combines the fan suction change, dry section airflow change, and wet section spray change into an operation correction quantity; subsequently, based on the wet core penetration state of the previous effective cycle, the observation correction quantity and the operation correction quantity are superimposed to obtain the candidate recursive state; when the candidate recursive state is less than zero, the recursive correction result is restricted to zero; when the candidate recursive state is greater than one, the recursive correction result is restricted to one; when the candidate recursive state is in the range of zero to one, the candidate recursive state is used as the recursive correction result.

[0063] The recursive correction result, after amplitude limiting, forms the current wet core penetration state. The current wet core penetration state is a dimensionless state quantity, with a value range of zero to one. Zero indicates that no identifiable wet core penetration risk has been formed, and one indicates that the wet core penetration state has reached the upper limit reference state under the current equipment operating conditions. This value range is used for state limiting and does not represent the measured value of a single sensor. It is not directly added to the moisture content, temperature, fan frequency, air guide opening, and spray volume. The upper limit reference state is formed by the stable operating window, the dry and wet section operating boundary, the actuator calibration record, and the historical high humidity operating record. When historical samples are insufficient, the equipment operating procedure and the stable operating record of the same type of cooling tower are used to form the initial upper limit reference state. The initial upper limit reference state is only used for recursive startup and does not enter the stable operating window update chain.

[0064] After the cooling regulation controller generates the current wet core penetration state, it generates the wet core change prediction result for the next cycle based on the direction of change of the current wet core penetration state relative to the wet core penetration state of the previous effective cycle and the operating driving quantity. When the current wet core penetration state is higher than the wet core penetration state of the previous effective cycle, the change between the two exceeds the resolvable prediction boundary, and the operating driving quantity points to the direction of wet core penetration enhancement, the wet core change prediction result for the next cycle represents the wet core enhancement trend. When the current wet core penetration state is lower than the wet core penetration state of the previous effective cycle, the change between the two exceeds the resolvable prediction boundary, and the operating driving quantity points to the direction of wet core penetration weakening, the wet core change prediction result for the next cycle represents the wet core decline trend. When the change between the current wet core penetration state and the wet core penetration state of the previous effective cycle does not exceed the resolvable prediction boundary, the wet core change prediction result for the next cycle represents that it does not exceed the resolvable range.

[0065] The resolvable predictive boundary is a dimensionless boundary with a value greater than zero and less than one. It is formed by the stable operating window, the error range of the temperature and humidity sensor, the dry and wet section operating boundary, and the actuator response record. It is used to eliminate false trends caused by instrument errors, sampling jitter, and short-term response lag of the actuator. It is not directly used as the judgment condition for the output of the regulation command by the regulation command generation module. When the resolvable predictive boundary cannot be reliably formed due to insufficient historical samples, the cooling regulation controller uses the equipment operation procedure, the stable operating record of the same type of cooling tower, and the factory response range of the actuator to form the initial resolvable predictive boundary. The initial resolvable predictive boundary is only used for prediction start-up, does not enter the stable operating window update chain, and marks the corresponding next cycle wet core change prediction result as a low confidence prediction result.

[0066] If at least one of the following situations exists: the wet core observation status does not meet the continuous change allowable condition; the dry and wet section operation data used to form the operation driving quantity does not meet the cross-cycle comparison condition of the same execution object and the same operation caliber; the operation direction verification fails; or the distinguishable prediction boundary is in the initial calibration state, the cooling regulation controller will mark the wet core change prediction result of the next cycle as a low confidence prediction result and prohibit the low confidence prediction result from being used as the sole basis for permitting the output fan frequency increment. The low confidence prediction result can enter the regulation action screening process of the regulation command generation module to limit the regulation amount of candidate regulation actions, but it must not trigger the fan frequency increment output alone, and it must not enter the stable operation window update chain.

[0067] In one embodiment, under low temperature and high humidity conditions in winter, the closed cooling tower exhibits an operating state where the average temperature and humidity at the top of the tower meet the control requirements, but the moisture content in the central area of ​​the duct is consistently higher than that in the circumferential edge area. When the wet section spray volume in the current control cycle increases compared to the previous effective cycle, the fan frequency increases synchronously, and the dry section air guide opening does not increase accordingly, the wet core observation state generation module generates a wet core intensity increase state and a positive wet core change amount. The wet core penetration state recursion module uses the wet core penetration state of the previous effective cycle as the state inheritance basis, combines the current wet core observation state and the operating driving quantity to recursively generate the current increased wet core penetration state, and marks the wet core change prediction result for the next cycle as an enhancing trend. After this result enters the adjustment command generation module, it is used to limit candidate adjustment actions that only increase the fan frequency, and to make the adjustment command generation module prioritize the selection of adjustment commands that include dry section air guide adjustment and wet section spray reduction.

[0068] In another embodiment, the enhanced air intake on the windward side leads to a unilaterally higher moisture content in the circumferential edge region. The moisture core observation state generation module generates a state of increased moisture core offset. However, there is an abnormal sampling interval between the current control cycle and the previous effective cycle. At this time, the moisture core penetration state recursion module does not use the moisture core change amount to form an enhanced trend judgment. Instead, it generates a limited recursion result based solely on the moisture core intensity, moisture core offset, and operating drive amount. The moisture core change prediction result for the next cycle is marked as a low-confidence prediction result. The low-confidence prediction result enters the adjustment action screening process of the adjustment command generation module, but it cannot be used as the sole basis for permitting the frequency increment of the output fan.

[0069] When there is inconsistency between the dry and wet section operating data used to generate the operating drive, the cooling regulation controller prohibits the generation of effective operating drive. If the current control cycle reads the first fan frequency while the previous effective cycle read the second fan frequency, no fan operation change is generated. Similarly, if the current control cycle reads the fan power while the previous effective cycle read the fan frequency, no fan operation change is generated. In this case, the wet core change prediction result for the next cycle is marked as a low-confidence prediction result, does not enter the stable operation window update chain, and is not used as a separate basis for the output fan frequency increment. This processing is used to avoid the incorrect mixing of data from different execution objects and different operating calibers, which would lead to inconsistent prediction results output by the state space model.

[0070] The current wet core penetration state and the predicted wet core change for the next cycle output by the wet core penetration state recursion module both correspond to the current control cycle identifier and are output to the regulation command generation module. The current wet core penetration state serves as the state constraint input for the regulation command generation module to screen candidate regulation actions, and the predicted wet core change for the next cycle serves as the prediction input for the regulation command generation module to determine whether the candidate regulation actions may exacerbate wet core penetration. Through this recursive processing, the humidity difference of the exhaust zone at the top of the tower in a single cycle is converted into a wet core penetration state with time continuity and actuator operation constraints, enabling subsequent regulation commands to distinguish the true enhancement trend of local high humidity channels, short-term sampling anomalies, and transient disturbances caused by changes in actuator operation.

[0071] The adjustment command generation module obtains candidate adjustment actions based on the outlet temperature of the closed-loop medium and its allowable range. The candidate adjustment actions correspond to the adjustment amounts of the fan, dry section air guide, and wet section spray. The adjustment action screening process is used to process the candidate adjustment actions and the prediction results of the wet core change in the next cycle to generate adjustment commands. When the adjustment command is a restricted adjustment command, the restricted adjustment command limits the fan frequency increment and includes the dry and wet section linkage adjustment amount formed by the dry section air guide adjustment amount and the wet section spray adjustment amount.

[0072] In this embodiment, the cooling regulation controller reads the closed-loop medium outlet temperature and its allowable range for the current control cycle, compares the closed-loop medium outlet temperature with the allowable range, and obtains the comparison result. The allowable range is used for temperature-side determination of the closed-loop medium outlet temperature, admission of candidate regulation actions, and verification of regulation direction. The allowable range is formed by the closed-loop medium heat exchange control target, equipment operation procedures, and operation protection boundaries, and is verified through a stable operation window. When the stable operation window is insufficient, the equipment operation procedures, factory protection range, and stable operation records of the same type of closed-loop cooling tower are used to form an initial allowable range. The control records formed based on the initial allowable range do not enter the stable operation window update chain.

[0073] When at least one of the following situations exists: the closed-loop medium outlet temperature is missing, the sensor's effective range is exceeded, or the control cycle identifier of the closed-loop medium outlet temperature is inconsistent with the control cycle identifier of the dry and wet section operation data, the cooling regulation controller will not generate a normal regulation command and will switch the current control cycle to restricted regulation command generation processing.

[0074] When the outlet temperature of the closed-loop medium is higher than the upper limit of the allowable range, the cooling control controller generates candidate control actions to increase the heat exchange capacity; when the outlet temperature of the closed-loop medium is lower than the lower limit of the allowable range, the cooling control controller generates candidate control actions to reduce the heat exchange intensity; when the outlet temperature of the closed-loop medium is within the allowable range, the cooling control controller generates candidate control actions to limit the fan frequency increment and constrain the wet section spray adjustment amount. The candidate control actions include fan frequency increment, dry section airflow adjustment amount, and wet section spray adjustment amount. The fan frequency increment is used to change the exhaust suction intensity in the tower, the dry section airflow adjustment amount is used to change the dry air mixing capacity, and the wet section spray adjustment amount is used to change the wet section heat exchange intensity and humid air generation intensity. In the candidate control action to reduce the heat exchange intensity, the fan frequency increment is used to limit the positive upward adjustment of the fan frequency relative to the current operating value. The cooling control controller does not output a control command to increase the fan frequency based on this comparison result.

[0075] Candidate adjustment actions are formed by the fan operating value, dry section air guiding operating value, wet section spray operating value, corresponding operating boundaries, single-cycle allowable change of the actuator, and equipment operating procedures of the current control cycle. The cooling control controller performs discrete stepping on the fan frequency increment, dry section air guiding adjustment amount, and wet section spray adjustment amount according to the single-cycle allowable change of the actuator, and calls the action combination allowed in the equipment operating procedures to form candidate adjustment actions. The cooling control controller generates candidate combinations of fan frequency increment, dry section air guiding adjustment amount, and wet section spray adjustment amount within the operating boundaries based on the current operating value. The fan frequency increment, dry section air guiding adjustment amount, and wet section spray adjustment amount all represent the adjustment amount relative to the operating value of the current control cycle.

[0076] The operating boundaries of the fan, dry section air guide, and wet section spray are used to limit the executable range of candidate adjustment actions and to exclude candidate adjustment actions that exceed the execution capacity and interlock protection conditions. The operating boundaries are formed by the rated frequency range of the fan, the opening range of the dry section air guide actuator, the flow range of the wet section spray branch, the equipment calibration records, the response time of the actuator, the control cycle length, and the interlock protection conditions. When the stable operation window is insufficient, the operating boundaries are formed by using the equipment factory response range, the equipment operation procedures, and the stable operation records of neighboring cooling towers of the same type. The initial operating boundaries are only used to limit candidate adjustment actions during the start-up phase and are not used as the basis for increasing the fan frequency increment and the wet section spray adjustment amount.

[0077] After the cooling regulation controller generates candidate regulation actions, it reads the wet core change prediction results for the next cycle output by the wet core penetration state recursion module. The wet core change prediction results for the next cycle include predictions that characterize the wet core penetration state enhancement, the wet core penetration state decline, the state not exceeding the resolvable range, and low-confidence predictions. The wet core change prediction results for the next cycle are formed by the wet core penetration state recursion module based on the current control cycle and the effective cycle data before it, without using the actual observation results of the next cycle.

[0078] When the predicted wet core change results for the next cycle indicate an enhanced wet core penetration state in the next cycle, the cooling control controller excludes candidate control actions that solely rely on the fan frequency increment to improve heat exchange capacity, and also excludes candidate control actions that solely rely on the wet section spray adjustment amount to improve heat exchange capacity. "Solely relying on the fan frequency increment to improve heat exchange capacity" means that among the candidate control actions, only the fan frequency increment is increased relative to the current control cycle's operating value, while the dry section airflow adjustment amount and the wet section spray adjustment amount are not included in the control action screening. "Solely relying on the wet section spray adjustment amount to improve heat exchange capacity" means that among the candidate control actions, only the wet section spray adjustment amount is increased relative to the current control cycle's operating value, while the fan frequency increment and the dry section airflow adjustment amount are not included in the control action screening.

[0079] The cooling regulation controller retains candidate regulation actions that include both dry section airflow regulation and wet section spray regulation and do not exceed the operating boundary. Including both dry section airflow regulation and wet section spray regulation means that both dry section airflow regulation and wet section spray regulation are used as valid regulation actions for screening, rather than being retained only as empty fields.

[0080] When the predicted wet core change in the next cycle indicates that the wet core penetration state has fallen back, the cooling control controller retains the candidate control actions according to the comparison results and continues to execute the operating boundary limits of the fan, dry section air guide and wet section spray. When the predicted wet core change in the next cycle does not exceed the distinguishable range, the cooling control controller does not use the prediction result as the basis for increasing the fan frequency increment and increasing the wet section spray control amount, and screens the candidate control actions according to the comparison results and operating boundaries.

[0081] When the predicted result of the wet core change in the next cycle is a low-confidence prediction result, the cooling regulation controller limits the adjustment amount of the candidate regulation action and prohibits the use of the low-confidence prediction result as the sole basis for permitting the output fan frequency increment. The low-confidence prediction result is only used to limit the upper limit of the fan frequency increment and the wet section spray regulation amount relative to the current control cycle operating value. It is not used to increase the fan frequency increment, not used to increase the wet section spray regulation amount, and is not included in the stable operation window update chain. When the outlet temperature of the closed-loop medium is lower than the lower limit of the allowable range, the low-confidence prediction result is not used as the basis for preventing the candidate regulation action from reducing the heat transfer intensity.

[0082] When low-reliability prediction results are used in the screening process for adjustment actions, the cooling control controller limits the fan frequency increment to the range jointly defined by the current fan operating value, the fan operating boundary, and the allowable change in the fan per cycle. It also limits the wet section spray adjustment to the range jointly defined by the current wet section spray operating value, the wet section spray operating boundary, and the allowable change in the wet section spray per cycle. When a candidate adjustment action requires increasing both the fan frequency increment and the wet section spray adjustment, the cooling control controller does not output a normal adjustment command but generates a restricted adjustment command and participates in the dry and wet section linkage adjustment through the dry section airflow adjustment.

[0083] The candidate adjustment actions retained after the adjustment action screening process enter the adjustment command generation process. The cooling adjustment controller verifies the execution object, operating boundary, and adjustment direction of the retained candidate adjustment actions. The execution object verification is used to confirm that the fan frequency increment, dry section air guide adjustment amount, and wet section spray adjustment amount correspond to the fans, dry section air guide actuators, and wet section spray branches that can be executed in the current control cycle, respectively. The operating boundary verification is used to confirm that each adjustment amount does not exceed the operating boundary of the corresponding actuator. The adjustment direction verification is used to confirm that the heat exchange capacity improvement attribute and heat exchange intensity reduction attribute corresponding to the candidate adjustment action in the equipment operation procedure are consistent with the comparison results.

[0084] The direction of adjustment is consistent with the comparison results, which means that: when the outlet temperature of the closed-loop medium is higher than the upper limit of the allowable range, the candidate adjustment action shall not reduce the heat exchange intensity; when the outlet temperature of the closed-loop medium is lower than the lower limit of the allowable range, the candidate adjustment action shall not continue to increase the heat exchange capacity; when the outlet temperature of the closed-loop medium is within the allowable range, the candidate adjustment action shall not simultaneously adjust the fan frequency increment and the wet section spray adjustment amount in the direction of enhancing the wet nucleus penetration state of the next cycle.

[0085] When the direction of a candidate adjustment action is consistent with the comparison result, is not excluded by the prediction result of the wet core change in the next cycle, and passes the verification of the execution object, operating boundary, and adjustment direction, the cooling adjustment controller converts the candidate adjustment action into an adjustment command. The adjustment command includes the fan frequency increment, the dry section air guide adjustment amount, and the wet section spray adjustment amount, and outputs it to the corresponding actuator along with the current control cycle identifier.

[0086] When there is at least one of the following situations: the adjustment direction of the candidate adjustment action is inconsistent with the comparison result, it is excluded by the prediction result of the wet core change in the next cycle, it fails the execution object verification, it fails the operation boundary verification, or it fails the adjustment direction verification, the cooling adjustment controller generates a restricted adjustment command. The restricted adjustment command limits the fan frequency increment and outputs the dry section air guide adjustment amount and the wet section spray adjustment amount as the dry and wet section linkage adjustment amount. The fan frequency increment in the restricted adjustment command is output within the range jointly limited by the operation boundary, the single-cycle allowable change amount of the actuator, and the prediction result of the wet core change in the next cycle, and is not directly increased according to the candidate adjustment action that improves the heat exchange capacity alone.

[0087] When the outlet temperature of the closed-loop medium is higher than the upper limit of the allowable range and the prediction result of the wet core change in the next cycle indicates that the wet core penetration state in the next cycle is enhanced, the restricted regulation command limits the fan frequency increment, and forms a dry-wet section linkage regulation through the dry section air guiding regulation and the wet section spray regulation; when the outlet temperature of the closed-loop medium is within the allowable range and the prediction result of the wet core change in the next cycle indicates that the wet core penetration state in the next cycle is enhanced, the restricted regulation command limits the fan frequency increment, and constrains the dry-wet mixing state of the exhaust section at the top of the tower through the dry section air guiding regulation, and constrains the humid air generation intensity through the wet section spray regulation; when the outlet temperature of the closed-loop medium is lower than the lower limit of the allowable range, the restricted regulation command limits the fan frequency increment, reduces the wet section heat exchange intensity through the wet section spray regulation, and maintains the exhaust air mixing state through the dry section air guiding regulation.

[0088] Through the adjustment command generation module, the cooling control controller incorporates the comparison results of the closed-loop medium outlet temperature, candidate adjustment actions, the prediction results of the wet nucleus change in the next cycle, and the operating boundary of the actuator into the same adjustment command generation chain, so that the adjustment command can meet the control requirements of the closed-loop medium outlet temperature while being constrained by the change of the wet nucleus penetration state in the next cycle.

[0089] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A closed-loop cooling regulation system for reducing cooling tower mist plumes, characterized in that, include: The partition operation data acquisition module acquires the partition operation data of the exhaust section at the top of the tower. The partition operation data is formed by encapsulating the humidity information of the exhaust section at the top of the tower, the dry and wet section operation data, and the outlet temperature of the closed-loop medium. The humidity information of the exhaust section at the top of the tower is obtained by converting the temperature and humidity observation values ​​of the central area and the circumferential edge area according to the center reference of the wind tunnel. The dry and wet section operation data corresponds to the operation boundaries of the fan, the dry section air guide, and the wet section spray. The wet core observation status generation module processes the partition operation data using partitioned humidity comparison processing to generate the wet core observation status, which includes wet core intensity, wet core offset, and wet core change. The wet nucleus penetration state recursive module uses a state-space model to recursively process the cross-cycle changes of the wet nucleus penetration state, wet nucleus observation state, and dry-wet segment operation data of the previous cycle, and generates the current wet nucleus penetration state and the prediction results of the wet nucleus changes in the next cycle. The regulation command generation module obtains candidate regulation actions based on the outlet temperature of the closed-loop medium and its allowable range. The candidate regulation actions correspond to the regulation amounts of the fan, dry section air guide, and wet section spray. The regulation action screening process is used to process the candidate regulation actions and the prediction results of the wet core change in the next cycle to generate regulation commands. When the regulation command is a restricted regulation command, the restricted regulation command limits the fan frequency increment and includes the dry and wet section linkage regulation amount formed by the dry section air guide regulation amount and the wet section spray regulation amount.

2. The closed-loop cooling regulation system for reducing cooling tower mist plumes according to claim 1, characterized in that, The process involves acquiring zoned operational data for the exhaust section at the top of the tower, including: establishing a fixed cross-sectional coordinate system for the exhaust section at the top of the tower based on the center of the duct; dividing the exhaust section at the top of the tower into a central region and circumferentially arranged edge regions according to the fixed cross-sectional coordinate system; acquiring temperature and humidity observations for each region within the same control cycle; and configuring region identifiers, control cycle identifiers, and valid statuses for the temperature and humidity observations; and using the current control cycle as the valid sampling cycle when the central region is valid and the valid circumferential edge regions meet the valid sampling admission conditions.

3. The closed-loop cooling regulation system for reducing cooling tower mist plumes according to claim 2, characterized in that, Generate zoned operation data, including: within the effective sampling period, convert the humidity of the temperature and humidity observation values ​​of each effective area using the tower area air pressure parameters corresponding to the current control period, and configure circumferential position markers according to the installation positions corresponding to each circumferential edge area to generate humidity information of the tower top exhaust zone; acquire the dry and wet section operation data and the closed-loop medium outlet temperature within the same effective sampling period, and encapsulate the tower top exhaust zone humidity information, dry and wet section operation data, and closed-loop medium outlet temperature into zoned operation data.

4. A closed-loop cooling regulation system for reducing cooling tower mist plumes according to claim 3, characterized in that, The partitioned humidity comparison processing is used to process the partitioned operation data, including: reading the humidity information of the tower top exhaust partition within the same valid sampling period, sorting the humidity of the circumferential edge region from low to high, and selecting the humidity of the circumferential edge region from the top of the sorted and not concentrated in the same circumferential position to form the edge humidity benchmark; using the edge humidity benchmark as the comparison object, determining the humidity increment of the central region and the circumferential edge region relative to the edge humidity benchmark, and generating the humidity core intensity based on the humidity increment; generating the humidity core offset based on the humidity increment of the circumferential edge region and its circumferential position identifier.

5. A closed-loop cooling regulation system for reducing cooling tower mist plumes according to claim 4, characterized in that, The generation of wet core observation status includes: when a wet core observation status of the previous valid sampling period exists, and the interval between the current control period and the previous valid sampling period meets the continuous change allowable condition formed by the control period length and the sampling period of temperature and humidity observation values, the wet core change amount is generated based on the wet core intensity, wet core offset, and wet core observation status of the previous valid sampling period in the current control period, and the wet core intensity, wet core offset, and wet core change amount are bound to the current control period identifier to form a wet core observation status; when a wet core observation status of the previous valid sampling period does not exist, the current control period is marked as the initial observation period, and the wet core change amount is set to zero; when the interval between the current control period and the previous valid sampling period does not meet the continuous change allowable condition, the generation of wet core change amount based on the current control period is prohibited.

6. A closed-loop cooling regulation system for reducing cooling tower mist plumes according to claim 5, characterized in that, The recursive processing is performed using a state-space model, including: defining the wet core penetration state of the previous cycle as the wet core penetration state of the previous effective cycle; forming operational driving quantities characterizing the cross-cycle changes of fan suction, dry section air guidance, and wet section spraying based on the dry and wet section operation data of the current control cycle and the previous effective cycle; and recursively correcting the wet core penetration state of the previous effective cycle by using the wet core observation state as the observation correction input and the operational driving quantities as the operation correction input.

7. A closed-loop cooling regulation system for reducing cooling tower mist plumes according to claim 6, characterized in that, The process generates the current wet core penetration state and the wet core change prediction result for the next cycle, including: correcting the wet core penetration state of the previous effective cycle based on the wet core intensity and wet core offset; when the interval between the current control cycle and the previous effective sampling cycle meets the continuous change allowable condition, incorporating the wet core change into the recursive correction to form the current wet core penetration state; generating the wet core change prediction result for the next cycle based on the change direction of the current wet core penetration state relative to the wet core penetration state of the previous effective cycle and the operating drive quantity; when there is at least one of the following situations: the interval between the current control cycle and the previous effective sampling cycle does not meet the continuous change allowable condition, or the dry and wet segment operating data used to form the operating drive quantity does not meet the cross-cycle comparison conditions of the same execution object and the same operating caliber, the wet core change prediction result for the next cycle is marked as a low-confidence prediction result, and the low-confidence prediction result is prohibited from being used as the sole basis for permitting the output fan frequency increment.

8. A closed-loop cooling regulation system for reducing cooling tower mist plumes according to claim 7, characterized in that, Candidate adjustment actions are obtained based on the closed-loop circulating medium outlet temperature and its allowable range, including: comparing the closed-loop circulating medium outlet temperature with the allowable range to obtain the comparison result; when the closed-loop circulating medium outlet temperature is higher than the upper limit of the allowable range, generating candidate adjustment actions to improve heat exchange capacity; when the closed-loop circulating medium outlet temperature is lower than the lower limit of the allowable range, generating candidate adjustment actions to reduce heat exchange intensity; when the closed-loop circulating medium outlet temperature is within the allowable range, generating candidate adjustment actions to limit the fan frequency increment and constrain the wet section spray adjustment amount; wherein, the candidate adjustment actions include the fan frequency increment, the dry section air guide adjustment amount, and the wet section spray adjustment amount, and the candidate adjustment actions do not exceed the operating boundaries of the fan, the dry section air guide, and the wet section spray.

9. A closed-loop cooling regulation system for reducing cooling tower mist plumes according to claim 8, characterized in that, The process involves screening and processing candidate adjustment actions and the predicted results of wet core changes in the next cycle. This includes: reading the predicted results of wet core changes in the next cycle; when the predicted results indicate an enhanced wet core penetration state in the next cycle, candidate adjustment actions that solely rely on the fan frequency increment to improve heat exchange capacity are excluded, as are candidate adjustment actions that solely rely on the wet section spray adjustment amount to improve heat exchange capacity, while retaining candidate adjustment actions that include both dry section airflow adjustment amount and wet section spray adjustment amount; when the predicted results of wet core changes in the next cycle are low-confidence predictions, the adjustment amount of candidate adjustment actions is restricted, and the low-confidence prediction results are prohibited from being used as the sole basis for permitting the output fan frequency increment.

10. A closed-loop cooling regulation system for reducing cooling tower mist plumes according to claim 9, characterized in that, The process of generating adjustment instructions includes: performing execution object verification, operation boundary verification, and adjustment direction verification on candidate adjustment actions retained after adjustment action screening; converting a candidate adjustment action into an adjustment instruction when the adjustment direction of the candidate adjustment action is consistent with the comparison result, is not excluded by the wet core change prediction result of the next cycle, and passes the execution object verification, operation boundary verification, and adjustment direction verification; and generating a restricted adjustment instruction when the adjustment direction of the candidate adjustment action is inconsistent with the comparison result, is excluded by the wet core change prediction result of the next cycle, fails the execution object verification, fails the operation boundary verification, or fails the adjustment direction verification, limiting the fan frequency increment, and outputting the dry section air guiding adjustment amount and the wet section spraying adjustment amount as a combined dry and wet section adjustment amount.

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