Radiation cooling and fresh air dehumidification linkage control method, device, equipment and medium

Abstract

The application discloses a radiation cooling and fresh air dehumidification linkage control method and device, equipment and medium. The method comprises the following steps: acquiring indoor air state parameters, outdoor air state parameters and fresh air dehumidification operation parameters in a set time window; determining an equivalent wet load sequence in the set time window according to the indoor air state parameters, the outdoor air state parameters and the fresh air dehumidification operation parameters; in the case that there are continuous preset number of equivalent wet loads greater than a reference wet load in the equivalent wet load sequence, determining a wet load type according to the attenuation rate of the equivalent wet load sequence; and linkage controlling the dehumidification rate of the fresh air system and the water supply temperature of the radiation cooling system according to the wet load type. The scheme can identify the wet load type through the attenuation rate of the equivalent wet load sequence, and can differentially adjust the fresh air system and the radiation cooling system according to the wet load type difference, so that the risk of dew condensation at the radiation cooling terminal and the system operation energy consumption can be reduced.

Description

Technical Field

[0001] This application relates to the field of HVAC control technology, and in particular to a method, device, equipment and medium for the linkage control of radiant cooling and fresh air dehumidification. Background Technology

[0002] With the development of building environment control technology, radiant cooling and fresh air dehumidification linkage control technology has been widely used in office buildings, public buildings and residential buildings.

[0003] However, existing linkage control technologies typically adjust the dehumidification rate and water supply temperature directly based on indoor humidity or dew point temperature, without fully considering the dynamic differences in various moisture loads. When the type of indoor moisture load changes, a mismatch between the dehumidification rate and water supply temperature can easily occur, leading to an increased risk of condensation and higher system energy consumption. Summary of the Invention

[0004] This application provides a method, device, equipment, and medium for the coordinated control of radiant cooling and fresh air dehumidification, which can improve the accuracy and adaptability of the coordinated control of radiant cooling and fresh air dehumidification under different moisture load types, and reduce the risk of condensation and system energy consumption.

[0005] Firstly, this application provides a method for the coordinated control of radiant cooling and fresh air dehumidification, including: Acquire indoor air condition parameters, outdoor air condition parameters, and fresh air dehumidification operation parameters within a set time window; The equivalent wet load sequence within the set time window is determined based on the indoor air state parameters, the outdoor air state parameters, and the fresh air dehumidification operation parameters. If a predetermined number of consecutive equivalent wet loads in the equivalent wet load sequence are greater than the reference wet load, the wet load type is determined according to the decay rate of the equivalent wet load sequence. The dehumidification rate of the fresh air system and the water supply temperature of the radiant cooling system are controlled in conjunction with each other based on the wet load type.

[0006] Secondly, this application provides a radiant cooling and fresh air dehumidification linkage control device, comprising: The acquisition module is configured to acquire indoor air status parameters, outdoor air status parameters, and fresh air dehumidification operation parameters within a set time window; The equivalent load module is configured to determine the equivalent moisture load sequence within the set time window based on the indoor air state parameters, the outdoor air state parameters, and the fresh air dehumidification operation parameters. The type determination module is configured to determine the wet load type based on the decay rate of the equivalent wet load sequence when there is a consecutive preset number of equivalent wet loads greater than the reference wet load in the equivalent wet load sequence. The linkage control module is configured to perform linkage control on the dehumidification rate of the fresh air system and the water supply temperature of the radiant cooling system according to the wet load type.

[0007] Thirdly, this application provides a radiant cooling and fresh air dehumidification linkage control device, including: One or more processors; A memory that stores one or more programs, which, when executed by one or more processors, cause the one or more processors to implement the radiant cooling and fresh air dehumidification linkage control method as described in the first aspect.

[0008] Fourthly, this application provides a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to perform the radiant cooling and fresh air dehumidification linkage control method as described in the first aspect.

[0009] In this application, an equivalent wet load sequence is determined using indoor and outdoor air state parameters and fresh air dehumidification operation parameters. The wet load type is identified based on the decay rate of the equivalent wet load in the equivalent wet load sequence. The dehumidification rate of the fresh air system and the water supply temperature of the radiant cooling system are then controlled in conjunction with the wet load type. This method can improve the matching degree between the dehumidification rate and water supply temperature and different wet load types, reducing the risk of condensation and system energy consumption. Attached Figure Description

[0010] Figure 1 This is a flowchart of a method for coordinated control of radiant cooling and fresh air dehumidification provided in an embodiment of this application; Figure 2 This is a flowchart of the method for determining the equivalent wet load sequence provided in the embodiments of this application; Figure 3 This is a flowchart of the method for determining indoor moisture storage sequence provided in the embodiments of this application; Figure 4 This is a flowchart of the method for determining the humidity sequence of fresh air exchange provided in the embodiments of this application; Figure 5 This is a flowchart of the method for determining the equivalent wet load sequence provided in the embodiments of this application; Figure 6 This is a flowchart of the method for determining the wet load type provided in the embodiments of this application; Figure 7 This is a flowchart of the linkage control method based on wet load type provided in the embodiments of this application; Figure 8This is a schematic diagram of the structure of the radiant cooling and fresh air dehumidification linkage control device provided in the embodiments of this application; Figure 9 This is a schematic diagram of the structure of a radiant cooling and fresh air dehumidification linkage control device provided in an embodiment of this application. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this application clearer, specific embodiments of this application will be described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely for explaining this application and not for limiting it. It should also be noted that, for ease of description, only the parts relevant to this application are shown in the drawings, not all of them. Before discussing exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe operations (or steps) as being processed sequentially, many of these operations can be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations can be rearranged. A process can be terminated when its operation is completed, but it may also have additional steps not included in the drawings. A process can correspond to a method, function, procedure, subroutine, subroutine, etc.

[0012] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects.

[0013] In radiant cooling, condensation is likely to occur when the surface temperature of the radiant cooling terminal is too low, while fresh air dehumidification can reduce indoor air humidity. Therefore, rationally coordinating the dehumidification rate of the fresh air system and the water supply temperature of the radiant cooling system according to changes in indoor moisture load is of great significance for reducing the risk of condensation and system energy consumption.

[0014] Existing technologies typically increase the dehumidification rate and water supply temperature directly based on the current indoor humidity or dew point temperature, but do not adequately consider the type of moisture load. For instantaneous moisture loads, this can easily lead to over-dehumidification and cooling loss; for continuous moisture loads, insufficient adjustment may result in moisture accumulation and increased condensation risk, leading to higher system energy consumption. Therefore, there is an urgent need to provide a radiant cooling and fresh air dehumidification linkage control scheme that can adapt to different moisture load types.

[0015] Figure 1This is a flowchart illustrating a method for coordinated control of radiant cooling and fresh air dehumidification provided in an embodiment of this application. (Reference) Figure 1 The specific methods for linking radiant cooling and fresh air dehumidification control include: S110: Obtain indoor air status parameters, outdoor air status parameters, and fresh air dehumidification operation parameters within the set time window.

[0016] The set time window can be a time interval consisting of multiple consecutive sampling times; indoor air status parameters can include indoor air temperature and indoor relative humidity; outdoor air status parameters can include outdoor air temperature and outdoor relative humidity; fresh air dehumidification operation parameters can include at least one of fresh air flow rate, supply air temperature, supply air relative humidity, and dehumidification equipment operation status.

[0017] In one embodiment, indoor air state parameters can be obtained by using a temperature and humidity sensor located at a preset indoor location to collect indoor air state parameters such as indoor air temperature and indoor relative humidity according to a preset sampling period.

[0018] In one embodiment, the outdoor air condition parameters can be obtained by collecting outdoor air temperature and outdoor relative humidity parameters through a temperature and humidity sensor installed at the fresh air inlet.

[0019] In one embodiment, the fresh air dehumidification operation parameters can be obtained by reading the fresh air flow rate, supply air temperature, supply air relative humidity, and dehumidification equipment operation status at each sampling time from the fresh air system controller.

[0020] Through the above steps, continuous change data on indoor and outdoor air humidity and the dehumidification operation status of the fresh air system can be obtained within a set time window, providing basic data for subsequent determination of the equivalent moisture load sequence.

[0021] S120. Determine the equivalent wet load sequence within the set time window based on the indoor air state parameters, the outdoor air state parameters, and the fresh air dehumidification operation parameters.

[0022] The equivalent wet load can be the comprehensive wet load calculated by combining the change in indoor air humidity and the actual dehumidification capacity of the fresh air system. The equivalent wet load sequence can be a sequence formed by arranging the equivalent wet loads corresponding to each sampling period within a set time window in chronological order.

[0023] Optionally, Figure 2 This is a flowchart of the method for determining the equivalent wet load sequence provided in the embodiments of this application. (Reference) Figure 2 The method for determining the equivalent wet load sequence specifically includes: S1201. Extract the indoor dehumidification volume sequence within the set time window from the fresh air dehumidification operation parameters.

[0024] Among them, the indoor dehumidification capacity can be the amount of moisture removed from the indoor air by the dehumidification unit of the fresh air system during a sampling period, and the indoor dehumidification capacity sequence can be a sequence formed by arranging the indoor dehumidification capacity corresponding to each sampling period within a set time window in chronological order.

[0025] In one embodiment, the method for extracting the indoor dehumidification volume sequence can be as follows: read the indoor dehumidification volume corresponding to the start and end times of the set time window from the fresh air dehumidification operation parameters, and arrange the extracted values ​​according to the operation timestamp to obtain the indoor dehumidification volume sequence.

[0026] In another embodiment, the indoor dehumidification quantity sequence can be extracted by: reading the indoor dehumidification rate and running time of each sampling period from the fresh air dehumidification operation parameters, multiplying the indoor dehumidification rate by the corresponding running time to obtain the indoor dehumidification quantity of each sampling period, and arranging the indoor dehumidification quantities in the order of sampling time to obtain the indoor dehumidification quantity sequence.

[0027] By following the steps above, we can extract the actual amount of indoor dehumidification undertaken by the fresh air system within the set time window, providing basic data for subsequent calculation of the equivalent moisture load for each sampling period.

[0028] S1202. Determine the indoor moisture storage sequence within the set time window based on the indoor air state parameters.

[0029] Among them, indoor moisture storage capacity can be the mass of water vapor contained in the indoor air at the corresponding sampling time, and indoor moisture storage capacity sequence can be a sequence formed by arranging the indoor moisture storage capacity corresponding to multiple sampling times within a set time window in chronological order.

[0030] Optionally, Figure 3 This is a flowchart of the method for determining indoor moisture storage sequence provided in an embodiment of this application. (Reference) Figure 3 The method for determining the indoor moisture storage sequence specifically includes: S12021. Obtain the indoor volume parameters, and calculate the indoor dry air mass based on the indoor volume parameters and the indoor air state parameters.

[0031] Among them, the indoor volume parameter can be the effective indoor space volume that participates in the change of air humidity, and the indoor dry air mass can be the mass of the dry air components other than water vapor in the indoor air. The indoor volume parameter can be pre-stored in the building management system.

[0032] In one embodiment, the room volume parameters can be obtained by reading the target room's room volume parameters from the building management system.

[0033] In one embodiment, the method for calculating indoor dry air mass can be as follows: The indoor total air pressure is collected using an indoor pressure sensor; the average indoor air temperature and relative humidity within a set time window are calculated; the saturated water vapor pressure corresponding to the average indoor air temperature is retrieved; the saturated water vapor pressure is multiplied by the average indoor relative humidity to obtain the indoor water vapor partial pressure; the indoor water vapor partial pressure is subtracted from the total indoor air pressure to obtain the indoor dry air partial pressure; the indoor dry air partial pressure and average indoor air temperature are substituted into the dry air state equation to obtain the indoor dry air density; and the indoor dry air density is multiplied by the indoor volume parameter to obtain the indoor dry air mass.

[0034] The above steps convert the size of the indoor space and the indoor air condition into the indoor dry air mass, providing basic parameters for the subsequent conversion of air humidity into indoor moisture storage capacity.

[0035] S12022. Perform humid air state conversion on the indoor air state parameters at each sampling time to obtain the indoor humidity sequence.

[0036] Indoor humidity can be the mass of water vapor carried by a unit mass of dry air, and indoor humidity sequence can be a sequence formed by arranging the indoor humidity at each sampling time in chronological order.

[0037] In one embodiment, the method for converting indoor air state parameters to humid air state parameters can be as follows: sequentially read the indoor air temperature and indoor relative humidity at each sampling time, and query the saturated water vapor pressure corresponding to the indoor air temperature; multiply the indoor relative humidity by the saturated water vapor pressure to obtain the indoor water vapor partial pressure; calculate the ratio between the indoor water vapor partial pressure and the difference between the indoor air pressure and the indoor water vapor partial pressure, and multiply this ratio by the molar mass ratio of water vapor to dry air to obtain the indoor humidity at the corresponding sampling time.

[0038] The above steps can convert relative humidity into the actual water vapor content per unit mass of dry air, providing basic data for subsequent calculation of indoor moisture storage series based on indoor dry air quality.

[0039] S12023. Multiply the indoor dry air mass by the indoor humidity sequence to obtain the indoor humidity storage sequence within the set time window.

[0040] In one embodiment, the calculation of the indoor moisture storage sequence can be as follows: Each indoor moisture content in the indoor moisture content sequence is read sequentially, and the indoor dry air mass is multiplied by each indoor moisture content to obtain the indoor moisture storage corresponding to each sampling time. The sampling timestamps corresponding to each indoor moisture storage are retained, and the indoor moisture storage is arranged according to the sampling timestamps to obtain the indoor moisture storage sequence. For example, if the indoor moisture content sequence includes multiple indoor moisture contents corresponding to the first sampling time to the Nth sampling time, then the product of the indoor dry air mass and each indoor moisture content is calculated to obtain the multiple indoor moisture storage contents corresponding to the first sampling time to the Nth sampling time.

[0041] The above steps can convert the water vapor content carried by a unit mass of dry air into the actual water vapor mass stored in the entire indoor space, providing basic data for subsequent calculation of changes in indoor moisture storage between adjacent sampling times.

[0042] S1203. Calculate the fresh air exchange humidity sequence within the set time window based on the indoor air state parameters, the outdoor air state parameters, and the fresh air dehumidification operation parameters.

[0043] Among them, the fresh air exchange humidity capacity can be the net moisture exchange volume caused by the difference in humidity content between indoor and outdoor air when the fresh air system delivers outdoor air into the room and exhausts an equal amount of indoor air; the fresh air exchange humidity capacity sequence can be a sequence formed by arranging the fresh air exchange humidity capacity corresponding to multiple sampling periods within a set time window in chronological order. When the fresh air exchange humidity capacity is positive, it means that the fresh air exchange brings moisture into the room; when the fresh air exchange humidity capacity is negative, it means that the fresh air exchange removes moisture from the room.

[0044] Optionally, Figure 4 This is a flowchart of the method for determining the humidity sequence of fresh air exchange provided in an embodiment of this application. (Reference) Figure 4 The method for determining the humidity sequence of fresh air exchange specifically includes: S12031. Perform humid air state conversion on the indoor and outdoor air state parameters at each sampling time to obtain the indoor humidity sequence and the outdoor humidity sequence.

[0045] Outdoor humidity can be defined as the mass of water vapor carried by a unit mass of dry outdoor air.

[0046] In one embodiment, the method for converting indoor air state parameters to humid air state parameters can be as follows: read the indoor air temperature and indoor relative humidity at each sampling time, and look up the saturated water vapor pressure corresponding to the indoor air temperature; convert the indoor relative humidity to a decimal and multiply it by the saturated water vapor pressure to obtain the indoor water vapor partial pressure; calculate the ratio between the indoor water vapor partial pressure and the difference between the indoor air pressure and the indoor water vapor partial pressure, and multiply this ratio by the molar mass ratio of water vapor to dry air to obtain the indoor humidity at each sampling time.

[0047] In one embodiment, the method for converting outdoor air state parameters to humid air state parameters can be as follows: read the outdoor air temperature and outdoor relative humidity at each sampling time, and look up the saturated water vapor pressure corresponding to the outdoor air temperature; convert the outdoor relative humidity to a decimal and multiply it by the saturated water vapor pressure to obtain the outdoor water vapor partial pressure; calculate the ratio between the outdoor water vapor partial pressure and the difference between the outdoor air pressure and the outdoor water vapor partial pressure, and multiply this ratio by the molar mass ratio of water vapor to dry air to obtain the outdoor humidity at each sampling time.

[0048] Through the above steps, the indoor and outdoor relative humidity can be uniformly converted into moisture content based on dry air quality, providing basic data for subsequent calculation of the moisture content of fresh air exchanged between indoor and outdoor air.

[0049] S12032. Extract the fresh air flow rate corresponding to each sampling cycle from the fresh air dehumidification operation parameters to obtain the fresh air flow rate sequence.

[0050] Among them, fresh air flow rate can be the volume of outdoor air delivered into the room by the fresh air system per unit time, and fresh air flow rate sequence can be a sequence formed by arranging the fresh air flow rates corresponding to multiple sampling periods within a set time window in chronological order.

[0051] In one embodiment, the method for extracting the fresh air flow sequence can be as follows: read the operation log stored by the fresh air system controller, filter the operation records using the start and end times of a set time window; identify the fresh air flow field and sampling timestamp in each operation record, extract the value corresponding to the fresh air flow field; convert each fresh air flow into a preset flow unit, and arrange them according to the sampling timestamp to obtain the fresh air flow sequence.

[0052] By following the steps above, we can obtain the actual air supply flow rate of the fresh air system in each sampling period, providing basic data for subsequent calculation of fresh air exchange volume and fresh air moisture exchange volume.

[0053] S12033. Subtract the indoor humidity sequence from the outdoor humidity sequence to obtain a humidity difference sequence, and determine the fresh air exchange humidity sequence based on the humidity difference sequence and the fresh air flow sequence.

[0054] Among them, the moisture content difference can be the difference between the outdoor moisture content and the indoor moisture content within the same sampling period, and the moisture content difference sequence can be a sequence formed by arranging the moisture content differences corresponding to multiple sampling periods within a set time window in chronological order.

[0055] In one embodiment, the method for calculating the moisture content difference sequence can be as follows: align the outdoor moisture content sequence and the indoor moisture content sequence according to the sampling timestamp, calculate the difference between the outdoor moisture content and the indoor moisture content at the same sampling time in sequence, and obtain the moisture content difference value corresponding to each sampling time; arrange the moisture content difference values ​​in the order of sampling time to obtain the moisture content difference sequence.

[0056] In one embodiment, the method for determining the fresh air exchange moisture sequence may be as follows: multiply the fresh air flow rate of each sampling period by the corresponding sampling period duration to obtain the fresh air exchange volume of each sampling period; multiply the fresh air exchange volume by the corresponding outdoor dry air density to obtain the fresh air exchange dry air mass of each sampling period; and multiply each fresh air exchange dry air mass by the moisture content difference of the same sampling period to obtain the fresh air exchange moisture sequence.

[0057] By following the steps above, the difference in indoor and outdoor humidity can be combined with the actual fresh air flow rate to quantify the amount of moisture input or output caused by fresh air exchange in each sampling period.

[0058] S1204. Perform moisture balance calculation based on the indoor moisture storage sequence, the fresh air exchange moisture sequence, and the indoor dehumidification sequence to obtain the equivalent moisture load sequence within the set time window.

[0059] Optionally, Figure 5 This is a flowchart of the method for determining the equivalent wet load sequence provided in the embodiments of this application. (Reference) Figure 5 The method for determining the equivalent wet load sequence specifically includes: S12041. Perform forward difference processing on the indoor moisture storage sequence to obtain the indoor moisture storage change sequence.

[0060] Among them, the change in indoor moisture storage can be the increase or decrease in the amount of moisture stored in the indoor air within the corresponding sampling period, and the sequence of changes in indoor moisture storage can be a sequence formed by arranging the changes in indoor moisture storage corresponding to multiple sampling periods within a set time window in chronological order.

[0061] In one embodiment, the calculation method for the indoor moisture storage change sequence can be as follows: subtract the indoor moisture storage of the previous sampling time from the indoor moisture storage of the subsequent sampling time in the indoor moisture storage sequence to obtain the indoor moisture storage change corresponding to the first sampling time to the second sampling time, the second sampling time to the third sampling time, and so on, up to the N-1th sampling time to the Nth sampling time; associate each indoor moisture storage change with the corresponding sampling period and arrange them in the time order of the sampling period to obtain the indoor moisture storage change sequence.

[0062] Through the above steps, the indoor moisture storage at each sampling time can be converted into the moisture storage change within each sampling period, providing data for subsequent moisture balance calculations.

[0063] S12042. Subtract the fresh air exchange moisture sequence from the sum of the indoor moisture storage change sequence and the indoor dehumidification sequence to obtain the equivalent moisture production sequence.

[0064] The equivalent moisture production can be the actual amount of water generated by indoor moisture sources within the corresponding sampling period after deducting the moisture introduced or removed by the fresh air exchange and replenishing the moisture removed by the fresh air system. The equivalent moisture production sequence can be a sequence formed by arranging the equivalent moisture production corresponding to multiple sampling periods within a set time window in chronological order.

[0065] In one embodiment, the equivalent moisture production sequence can be calculated as follows: the indoor moisture storage change sequence, the indoor dehumidification sequence, and the fresh air exchange moisture sequence are aligned according to the sampling period identifier or start and end time, and the values ​​in the three sequences are uniformly converted to the same moisture mass unit; for each sampling period, the indoor moisture storage change and indoor dehumidification of the sampling period are added together, and then the fresh air exchange moisture of the sampling period is subtracted to obtain the equivalent moisture production sequence.

[0066] Through the above steps, the effects of fresh air exchange and system dehumidification can be separated from changes in indoor moisture storage, resulting in a sequence that characterizes the actual moisture production of indoor moisture sources.

[0067] S12043. Divide the equivalent wet load sequence by the sampling period duration to obtain the equivalent wet load sequence.

[0068] In one embodiment, the equivalent wet load sequence can be calculated as follows: sequentially read each equivalent wet load in the equivalent wet load sequence, obtain the start time and end time of the sampling period corresponding to each equivalent wet load; calculate the time difference between the end time and the start time to obtain the corresponding sampling period duration; divide each equivalent wet load by the corresponding sampling period duration to obtain the equivalent wet load of each sampling period.

[0069] Through the above steps, the equivalent moisture production per unit time can be converted into the cumulative moisture load generated in each sampling period, providing basic data for subsequent analysis of the duration and decay trend of the equivalent moisture load.

[0070] S130. If there is a preset number of consecutive equivalent wet loads in the equivalent wet load sequence that are greater than the reference wet load, the wet load type is determined according to the decay rate of the equivalent wet load sequence.

[0071] The baseline wet load can be the reference value of the wet load when the indoor humidity is stable and the fresh air system is in normal operation; the number of consecutive presets can be preset according to the sampling period and the allowable duration of wet load fluctuations; the wet load type can include transient wet load and continuous wet load.

[0072] Optionally, Figure 6 This is a flowchart of the method for determining the wet load type provided in an embodiment of this application. (Reference) Figure 6 The method for determining the type of wet load specifically includes: S1301. Calculate the average attenuation rate based on the difference between adjacent equivalent wet loads in the equivalent wet load sequence and the sampling period duration.

[0073] The average decay rate can be the average rate at which the equivalent wet load decreases over time within a set time window.

[0074] In one embodiment, the average decay rate can be calculated as follows: read two adjacent equivalent wet loads in the equivalent wet load sequence in the order of sampling time, subtract the next equivalent wet load from the previous equivalent wet load to obtain the wet load difference between the corresponding adjacent sampling periods; divide the wet load difference by the time interval between the corresponding times of the two equivalent wet loads to obtain the corresponding wet load decay rate; calculate the arithmetic mean of multiple wet load decay rates to obtain the average decay rate.

[0075] Through the above steps, the changing trend of the equivalent wet load sequence can be converted into a quantifiable average decay rate, providing a basis for distinguishing between transient wet loads that decay rapidly and persistent wet loads that are maintained for a long time.

[0076] S1302. If the average attenuation rate is greater than or equal to a preset attenuation rate threshold, the wet load type within the set time window is determined as an instantaneous wet load.

[0077] The preset decay rate threshold can be a critical decay rate used to distinguish between instantaneous wet load and continuous wet load. Instantaneous wet load can be caused by factors such as short-term gathering of people, opening doors to introduce humid air, or short-term operation of moisture-generating equipment, and is a wet load that decays rapidly after the moisture source disappears.

[0078] In one embodiment, the wet load type can be determined as an instantaneous wet load by: reading the average attenuation rate and a preset attenuation rate threshold, converting them into the same unit of measurement, and comparing them using a numerical comparator; if the average attenuation rate is greater than or equal to the preset attenuation rate threshold, an instantaneous load identifier is generated, and the instantaneous load identifier is associated with a set time window, thus determining the wet load type within the set time window as an instantaneous wet load.

[0079] The above steps can identify the wet load that drops rapidly after the moisture source disappears, providing a basis for subsequent judgment on the use of a dehumidification rate and water supply temperature linkage control method suitable for instantaneous wet loads.

[0080] S1303. If the average decay rate is less than the preset decay rate threshold, the wet load type within the set time window is determined to be a continuous wet load.

[0081] Among them, continuous wet load can be caused by factors such as continuous human activity, continuous operation of moisture-generating equipment, continuous entry of outdoor high-humidity air, or moisture seepage from the building envelope, and is a wet load that slowly decreases, remains basically unchanged, or continues to increase within a set time window.

[0082] In one embodiment, the wet load type can be determined as a continuous wet load by: reading the average decay rate and a preset decay rate threshold stored in the control parameter library, converting them to the same unit of measurement, and comparing them using a numerical comparator; if the average decay rate is less than the preset decay rate threshold, a continuous load identifier is generated, and the continuous load identifier is associated with a set time window, thus determining the wet load type within the set time window as a continuous wet load. Specifically, when the average decay rate is a positive value less than the preset decay rate threshold, it indicates that the equivalent wet load is slowly decreasing; when the average decay rate is zero, it indicates that the equivalent wet load remains essentially unchanged; when the average decay rate is negative, it indicates that the equivalent wet load is still increasing. All of these situations indicate that the wet load has not rapidly diminished within the set time window, therefore it is determined as a continuous wet load.

[0083] The above steps can identify persistent or slowly decaying moisture loads, providing a basis for judgment to improve the dehumidification rate of the fresh air system and adjust the water supply temperature of the radiant cooling system.

[0084] S140. The dehumidification rate of the fresh air system and the water supply temperature of the radiant cooling system are controlled in conjunction with each other according to the wet load type.

[0085] Among them, the linkage control can determine the adjustment priority and adjustment range of dehumidification rate and water supply temperature according to different wet load types, so as to reduce dehumidification energy consumption and cooling capacity loss while avoiding condensation at the radiant cooling terminal.

[0086] Optionally, Figure 7 This is a flowchart of a linkage control method based on wet load type provided in an embodiment of this application. (Reference) Figure 7 The linkage control method based on wet load type specifically includes: S1401. When the wet load type is instantaneous wet load, the equivalent wet load sequence is integrated to obtain the cumulative wet load, and the target dehumidification rate and target dehumidification duration are determined based on the cumulative wet load.

[0087] Among them, the cumulative moisture production can be the cumulative moisture mass generated by indoor moisture sources during the duration of instantaneous moisture load, the target dehumidification rate can be the dehumidification rate adopted by the fresh air system to eliminate the cumulative moisture production, and the target dehumidification duration can be the time during which the fresh air system runs continuously at the target dehumidification rate.

[0088] In one embodiment, the equivalent wet load sequence can be integrated as follows: the equivalent wet load at adjacent sampling times is read sequentially, the average value of two adjacent equivalent wet loads is calculated, the average value is multiplied by the time interval between the two sampling times to obtain the wet load of the corresponding sampling period; the wet load of multiple sampling periods is accumulated to obtain the cumulative wet load.

[0089] In one embodiment, the target dehumidification rate and target dehumidification duration can be determined as follows: read the baseline dehumidification rate, maximum dehumidification rate, and preset recovery time of the fresh air system; divide the cumulative moisture generation by the preset recovery time to obtain the required additional dehumidification rate; if the required additional dehumidification rate does not exceed the difference between the maximum dehumidification rate and the baseline dehumidification rate, then the sum of the baseline dehumidification rate and the required additional dehumidification rate is determined as the target dehumidification rate, and the preset recovery time is determined as the target dehumidification duration; if the required additional dehumidification rate exceeds the difference between the maximum dehumidification rate and the baseline dehumidification rate, then the maximum dehumidification rate is determined as the target dehumidification rate, and the cumulative moisture generation is divided by the difference between the maximum dehumidification rate and the baseline dehumidification rate to obtain the target dehumidification duration.

[0090] By following the steps above, the dehumidification intensity and duration can be set according to the cumulative moisture production of the instantaneous moisture load, so that the fresh air system can eliminate the moisture generated in a short time within a limited time, avoiding energy waste caused by maintaining a high dehumidification rate for a long time.

[0091] S1402. When the wet load type is continuous wet load, calculate the average value of the equivalent wet load sequence to obtain the average moisture generation rate, determine the average moisture generation rate as the target dehumidification rate, and set the target dehumidification duration as the default dehumidification duration.

[0092] Among them, the average moisture generation rate can be the average mass of water generated per unit time by indoor moisture sources within a set time window, the target dehumidification rate can be the dehumidification rate that the fresh air system needs to achieve in subsequent control cycles, and the default dehumidification duration can be the continuous dehumidification time pre-stored in the control parameter library.

[0093] In one embodiment, the average moisture generation rate can be calculated by sequentially reading each equivalent moisture load in the equivalent moisture load sequence, summing the multiple equivalent moisture loads, and dividing the summation result by the number of equivalent moisture loads to obtain the average moisture generation rate.

[0094] In one embodiment, the target dehumidification rate can be determined by converting the average moisture generation rate into the dehumidification rate unit used by the fresh air system, and then determining the converted average moisture generation rate as the target dehumidification rate.

[0095] In one embodiment, the target dehumidification duration can be determined by reading the default dehumidification duration from the control parameter library and setting the default dehumidification duration as the target dehumidification duration.

[0096] By following the steps above, the dehumidification rate of the fresh air system can be matched with the average moisture generation rate of the continuous moisture source, avoiding the dehumidification rate being too high or too low for a long time, and adapting to changes in continuous moisture load through periodic updates.

[0097] S1403. Control the fresh air system to operate at the target dehumidification rate for the target dehumidification duration, and limit the decrease in radiant water supply temperature within the target dehumidification duration.

[0098] Among them, the fresh air system can be an air handling system with functions of outdoor air introduction, air dehumidification and air supply regulation, such as independent fresh air dehumidification units and 100% fresh air handling units; the radiant water supply temperature can be the temperature of the chilled water delivered to the radiant cooling terminal.

[0099] In one embodiment, the operation of the fresh air system can be controlled by: writing the target dehumidification rate and target dehumidification duration into the fresh air system controller and starting the dehumidification timer; the fresh air system controller adjusts the compressor operating frequency, the opening degree of the dehumidification coil water valve, or the air supply volume to make the actual dehumidification rate reach the target dehumidification rate; and the current target dehumidification task ends when the dehumidification timer reaches the target dehumidification duration.

[0100] In one embodiment, the method to limit the decrease in radiant water supply temperature can be: recording the current radiant water supply temperature when the dehumidification timer is started, and setting the current radiant water supply temperature as the lower limit of the water supply temperature within the target dehumidification time; if the radiant cooling system receives a temperature setting value lower than the lower limit of the water supply temperature, then keeping the current radiant water supply temperature unchanged.

[0101] By following the steps above, the radiant water supply temperature can be prevented from dropping too quickly or excessively during the elimination of moisture load in the fresh air system, thereby reducing the risk of condensation at the radiant cooling terminal and avoiding the loss of cooling capacity caused by directly and significantly increasing the supply water temperature.

[0102] Based on the above embodiments, Figure 8 This is a schematic diagram of the radiant cooling and fresh air dehumidification linkage control device provided in an embodiment of this application. (Reference) Figure 8 The radiant cooling and fresh air dehumidification linkage control device provided in this embodiment specifically includes: acquisition module 11, equivalent load module 12, type determination module 13, and linkage control module 14.

[0103] The acquisition module 11 is configured to acquire indoor air state parameters, outdoor air state parameters, and fresh air dehumidification operation parameters within a set time window; the equivalent load module 12 is configured to determine the equivalent wet load sequence within the set time window based on the indoor air state parameters, outdoor air state parameters, and fresh air dehumidification operation parameters; the type determination module 13 is configured to determine the wet load type based on the decay rate of the equivalent wet load sequence when there is a consecutive preset number of equivalent wet loads greater than the reference wet load; and the linkage control module 14 is configured to perform linkage control on the dehumidification rate of the fresh air system and the water supply temperature of the radiant cooling system based on the wet load type.

[0104] The radiant cooling and fresh air dehumidification linkage control device provided in this application embodiment, through the coordinated operation of the acquisition module 11, the equivalent load module 12, the type determination module 13, and the linkage control module 14, achieves the acquisition of air state parameters and fresh air dehumidification operation parameters, the determination of the equivalent wet load sequence, the identification of wet load type, and the linkage control of radiant cooling and fresh air dehumidification. The acquisition module 11 is used to acquire indoor air state parameters, outdoor air state parameters, and fresh air dehumidification operation parameters within a set time window; the equivalent load module 12 is used to determine the equivalent wet load sequence within the set time window based on the indoor air state parameters, outdoor air state parameters, and fresh air dehumidification operation parameters; the type determination module 13 is used to determine the wet load type based on the decay rate of the equivalent wet load sequence when there is a consecutive preset number of equivalent wet loads greater than the reference wet load; and the linkage control module 14 is used to perform linkage control on the dehumidification rate of the fresh air system and the water supply temperature of the radiant cooling system based on the wet load type. This embodiment can distinguish different wet load types based on the changing characteristics of equivalent wet load, and implement corresponding linkage control for different wet load types, reducing unnecessary dehumidification and water supply temperature adjustment, and improving the control accuracy and operating efficiency of the system.

[0105] The radiant cooling and fresh air dehumidification linkage control device provided in this application embodiment can be used to execute the radiant cooling and fresh air dehumidification linkage control method provided in the above embodiment, and has corresponding functions and beneficial effects.

[0106] Figure 9 This is a schematic diagram of a radiant cooling and fresh air dehumidification linkage control device provided in an embodiment of this application, with reference to... Figure 9 The radiant cooling and fresh air dehumidification linkage control device includes: a processor 21, a memory 22, a communication device 23, an input device 24, and an output device 25. The number of processors 21 and the number of memories 22 in the radiant cooling and fresh air dehumidification linkage control device can be one or more. The processor 21, memory 22, communication device 23, input device 24, and output device 25 of the radiant cooling and fresh air dehumidification linkage control device can be connected via a bus or other means.

[0107] The memory 22, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as program instructions / modules corresponding to the radiant cooling and fresh air dehumidification linkage control method in any embodiment of this application (e.g., the acquisition module 11, equivalent load module 12, type determination module 13, and linkage control module 14 in the radiant cooling and fresh air dehumidification linkage control device). The memory 22 may primarily include a program storage area and a data storage area. The program storage area may store the operating system and at least one application program required for a function; the data storage area may store data created based on the use of the device, etc. Furthermore, the memory 22 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some instances, the memory may further include memory remotely located relative to the processor, and these remote memories can be connected to the device via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0108] The communication device 23 is used for data transmission.

[0109] The processor 21 executes various functional applications and data processing of the device by running software programs, instructions and modules stored in the memory 22, thereby realizing the above-mentioned radiant cooling and fresh air dehumidification linkage control method.

[0110] Input device 24 can be used to receive input digital or character information, and to generate key signal inputs related to user settings and function control of the device. Output device 25 may include display devices such as a display screen.

[0111] The radiant cooling and fresh air dehumidification linkage control equipment provided above can be used to execute the radiant cooling and fresh air dehumidification linkage control method provided in the above embodiments, and has corresponding functions and beneficial effects.

[0112] This application embodiment also provides a storage medium containing computer-executable instructions. When executed by a computer processor, the computer-executable instructions are used to perform a method for coordinated control of radiant cooling and fresh air dehumidification. The method includes: acquiring indoor air state parameters, outdoor air state parameters, and fresh air dehumidification operation parameters within a set time window; determining an equivalent moisture load sequence within the set time window based on the indoor air state parameters, outdoor air state parameters, and fresh air dehumidification operation parameters; determining a moisture load type based on the decay rate of the equivalent moisture load sequence when a predetermined number of consecutive equivalent moisture loads in the equivalent moisture load sequence exceed a reference moisture load; and coordinating the dehumidification rate of the fresh air system and the water supply temperature of the radiant cooling system based on the moisture load type.

[0113] Storage medium—any type of memory device or storage device. The term "storage medium" is intended to include: mounting media, such as CD-ROM, floppy disk, or magnetic tape devices; computer system memory or random access memory, such as DRAM, DDR RAM, SRAM, EDO RAM, etc.; non-volatile memory, such as flash memory, magnetic media (e.g., hard disk or optical storage); registers or other similar types of memory elements, etc. Storage medium may also include other types of memory or combinations thereof. Furthermore, storage medium may reside in a first computer system in which a program is executed, or it may reside in a different second computer system connected to the first computer system via a network (such as the Internet). The second computer system can provide program instructions to the first computer for execution. The term "storage medium" may include two or more storage media residing in different locations (e.g., in different computer systems connected via a network). Storage medium may store program instructions (e.g., specifically implemented as a computer program) executable by one or more processors.

[0114] Of course, the computer-executable instructions provided in the embodiments of this application are not limited to the above-mentioned radiant cooling and fresh air dehumidification linkage control method, but can also execute related operations in the radiant cooling and fresh air dehumidification linkage control method provided in any embodiment of this application.

[0115] The radiant cooling and fresh air dehumidification linkage control device, storage medium, and radiant cooling and fresh air dehumidification linkage control equipment provided in the above embodiments can execute the radiant cooling and fresh air dehumidification linkage control method provided in any embodiment of this application. For technical details not described in detail in the above embodiments, please refer to the radiant cooling and fresh air dehumidification linkage control method provided in any embodiment of this application.

[0116] The above description is merely a preferred embodiment and the technical principles employed in this application. This application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions that can be made by those skilled in the art will not depart from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of this application. The scope of this application is determined by the scope of the claims.

Claims

1. A method for coordinated control of radiant cooling and fresh air dehumidification, characterized in that, include: Acquire indoor air condition parameters, outdoor air condition parameters, and fresh air dehumidification operation parameters within a set time window; The equivalent wet load sequence within the set time window is determined based on the indoor air state parameters, the outdoor air state parameters, and the fresh air dehumidification operation parameters. If a predetermined number of consecutive equivalent wet loads in the equivalent wet load sequence are greater than the reference wet load, the wet load type is determined according to the decay rate of the equivalent wet load sequence. The dehumidification rate of the fresh air system and the water supply temperature of the radiant cooling system are controlled in conjunction with each other based on the wet load type.

2. The method for coordinated control of radiant cooling and fresh air dehumidification according to claim 1, characterized in that, The step of determining the equivalent moisture load sequence within the set time window based on the indoor air state parameters, the outdoor air state parameters, and the fresh air dehumidification operation parameters includes: Extract the indoor dehumidification volume sequence within the set time window from the fresh air dehumidification operation parameters; The indoor moisture storage sequence within the set time window is determined based on the indoor air state parameters. Based on the indoor air state parameters, the outdoor air state parameters, and the fresh air dehumidification operation parameters, calculate the fresh air exchange humidity sequence within the set time window; Based on the indoor moisture storage sequence, the fresh air exchange moisture sequence, and the indoor dehumidification sequence, a moisture balance calculation is performed to obtain the equivalent moisture load sequence within the set time window.

3. The method for coordinated control of radiant cooling and fresh air dehumidification according to claim 2, characterized in that, Determining the indoor moisture storage sequence within the set time window based on the indoor air state parameters includes: Obtain the room volume parameters, and calculate the indoor dry air mass based on the room volume parameters and the indoor air state parameters; The indoor air state parameters at each sampling time are converted to humid air state parameters to obtain the indoor humidity sequence. Multiply the indoor dry air mass by the indoor humidity sequence to obtain the indoor humidity storage sequence within the set time window.

4. The method for coordinated control of radiant cooling and fresh air dehumidification according to claim 2, characterized in that, The step of calculating the fresh air exchange humidity sequence within the set time window based on the indoor air state parameters, the outdoor air state parameters, and the fresh air dehumidification operation parameters includes: The indoor and outdoor air state parameters at each sampling time were converted into humid air state parameters to obtain indoor and outdoor humidity sequences. The fresh air flow rate corresponding to each sampling cycle is extracted from the fresh air dehumidification operation parameters to obtain the fresh air flow rate sequence; The outdoor humidity sequence is subtracted from the indoor humidity sequence to obtain the humidity difference sequence. The fresh air exchange humidity sequence is determined based on the humidity difference sequence and the fresh air flow rate sequence.

5. The method for coordinated control of radiant cooling and fresh air dehumidification according to claim 2, characterized in that, The step of performing moisture balance calculations based on the indoor moisture storage sequence, the fresh air exchange moisture sequence, and the indoor dehumidification sequence to obtain the equivalent moisture load sequence within the set time window includes: The indoor moisture storage sequence is subjected to forward difference processing to obtain the indoor moisture storage change sequence; Subtracting the fresh air exchange moisture sequence from the sum of the indoor moisture storage change sequence and the indoor dehumidification sequence yields the equivalent moisture production sequence. The equivalent wet load sequence is obtained by dividing the equivalent wet production sequence by the sampling period duration.

6. The method for coordinated control of radiant cooling and fresh air dehumidification according to claim 1, characterized in that, The step of determining the wet load type based on the decay rate of the equivalent wet load sequence includes: The average decay rate is calculated based on the difference between adjacent equivalent wet loads in the equivalent wet load sequence and the sampling period duration. If the average decay rate is greater than or equal to a preset decay rate threshold, the wet load type within the set time window is determined to be an instantaneous wet load. If the average decay rate is less than the preset decay rate threshold, the wet load type within the set time window is determined to be a continuous wet load.

7. The method for coordinated control of radiant cooling and fresh air dehumidification according to claim 1, characterized in that, The linkage control of the dehumidification rate of the fresh air system and the water supply temperature of the radiant cooling system based on the wet load type includes: When the wet load type is instantaneous wet load, the equivalent wet load sequence is integrated to obtain the cumulative moisture production, and the target dehumidification rate and target dehumidification duration are determined based on the cumulative moisture production. When the wet load type is continuous wet load, the average value of the equivalent wet load sequence is calculated to obtain the average moisture generation rate, the average moisture generation rate is determined as the target dehumidification rate, and the target dehumidification duration is set as the default dehumidification duration; The fresh air system is controlled to operate at the target dehumidification rate for the target dehumidification duration, and the decrease in radiant water supply temperature is limited within the target dehumidification duration.

8. A radiant cooling and fresh air dehumidification linkage control device, characterized in that, include: The acquisition module is configured to acquire indoor air status parameters, outdoor air status parameters, and fresh air dehumidification operation parameters within a set time window; The equivalent load module is configured to determine the equivalent moisture load sequence within the set time window based on the indoor air state parameters, the outdoor air state parameters, and the fresh air dehumidification operation parameters. The type determination module is configured to determine the wet load type based on the decay rate of the equivalent wet load sequence when there is a consecutive preset number of equivalent wet loads greater than the reference wet load in the equivalent wet load sequence. The linkage control module is configured to perform linkage control on the dehumidification rate of the fresh air system and the water supply temperature of the radiant cooling system according to the wet load type.

9. A radiant cooling and fresh air dehumidification linkage control device, characterized in that, include: One or more processors; A memory that stores one or more programs, which, when executed by one or more processors, enable the one or more processors to implement the radiant cooling and fresh air dehumidification linkage control method as described in any one of claims 1-7.

10. A storage medium containing computer-executable instructions, characterized in that, The computer-executable instructions, when executed by a computer processor, are used to perform the radiant cooling and fresh air dehumidification linkage control method as described in any one of claims 1-7.

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