A dynamic self-adaptive chiller energy-saving regulation method and system

Abstract

The present application relates to a kind of dynamic self-adapting chiller energy-saving regulation method and system, for solving the problem that the energy consumption of system is too high caused by long-term operation of chiller under fixed operating condition, the method comprises: obtaining the return water flow, return water temperature and supply water temperature of chilled water;Current cooling load of system is calculated based on return water flow, supply and return water temperature;Determine cooling load correction temperature according to maximum cooling load and current cooling load;Obtain preset target relative humidity and actual average relative humidity, determine dehumidification correction temperature according to preset target relative humidity and average relative humidity;Determine outlet water temperature correction value based on cooling load correction temperature and dehumidification correction temperature;According to outlet water temperature correction value, the standard operating condition supply water temperature of pre-set is corrected;Adjust the chilled water outlet temperature of chiller according to the chilled water outlet temperature target value.This method adjusts outlet water temperature, meets refrigeration demand and takes into account dehumidification effect, improves the overall energy efficiency of system.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of refrigeration equipment, and more particularly, to a dynamic adaptive chiller unit energy-saving regulation method and system. BACKGROUND

[0002] At present, the refrigeration room in the subway station usually runs under the condition of a fixed 7℃ chilled water outlet temperature and a 5℃ return water temperature difference. This condition is designed based on the most extreme weather conditions to ensure that the refrigeration capacity of the refrigeration room can meet the needs of the terminal equipment in the hottest weather in summer, and also ensure that the chilled water of the air conditioner can reach a low enough temperature to meet the dehumidification dew point requirement in humid period, so as to effectively dehumidify.

[0003] However, this design does not fully consider the energy saving of the air conditioning system under the terminal part load and the transition season. Since the refrigeration room in the prior art runs under a fixed condition for a long time, the efficiency of the main machine and the system is often at a low level, and for every 1℃ increase in the supply water temperature condition, the energy efficiency of the main machine can be improved by about 3.0%. Therefore, the low-efficiency operation state of this fixed condition will lead to low system energy efficiency and high energy consumption and increase the operating cost in the long-term operation process. SUMMARY

[0004] The present application aims to overcome at least one of the above-mentioned defects (shortcomings) of the prior art, and provides a dynamic adaptive chiller unit energy-saving regulation method and system to solve the problem of low system energy efficiency and high energy consumption caused by long-term operation of the chiller unit under a fixed condition.

[0005] According to a first aspect of the present application, a dynamic adaptive chiller unit energy-saving regulation method is provided, which comprises:

[0006] obtaining the return water flow, return water temperature and supply water temperature of the chilled water;

[0007] calculating the current cooling load of the chiller unit based on the return water flow, return water temperature and supply water temperature;

[0008] obtaining the maximum cooling load of the chiller unit, and determining the cooling load correction temperature according to the maximum cooling load and the current cooling load;

[0009] obtaining the preset target relative humidity and the actual average relative humidity of the cooling environment corresponding to the chiller unit, and determining the dehumidification correction temperature according to the preset target relative humidity and the actual average relative humidity;

[0010] determining the outlet water temperature correction value based on the cooling load correction temperature and the dehumidification correction temperature;

[0011] correcting the preset standard condition supply water temperature according to the outlet water temperature correction value to obtain the chilled water outlet temperature target value;

[0012] Adjust the chilled water outlet temperature of the water chiller according to the chilled water outlet temperature target value.

[0013] By calculating the current cooling load in real time and comparing it with the maximum cooling load to obtain a cooling load correction temperature, and by considering the difference between the actual average relative humidity and the preset target relative humidity to determine a dehumidification correction temperature, the adjustment of the chilled water outlet temperature can meet both the refrigeration demand and the dehumidification effect, can better meet the actual operation demand, and can avoid the energy efficiency loss caused by excessive refrigeration or insufficient dehumidification under the traditional fixed working condition, thereby improving the overall energy efficiency of the air conditioning system.

[0014] Optionally, the calculation formula of the current cooling load is as follows:

[0015] = c× ×v×(T2 - T1)

[0016] wherein, is the current cooling load, v is the return water flow of the chilled water, is the density of the chilled water, c is the specific heat capacity of the chilled water, T2 is the return water temperature of the chilled water, and T1 is the supply water temperature of the chilled water.

[0017] By calculating the cooling load correction value, the water chiller can obtain the current cooling load of the water chiller in real time, and the cooling load correction temperature can be calculated more accurately according to the current cooling load subsequently.

[0018] Optionally, the calculation formula of the cooling load correction temperature is as follows:

[0019]

[0020] wherein, β is a supply water temperature allowable upper limit bias constant, is the maximum cooling load, is the current cooling load.

[0021] Optionally, the determination of the dehumidification correction temperature according to the preset target relative humidity and the actual average relative humidity comprises:

[0022] calculating a relative humidity difference value between the actual average relative humidity and the preset target relative humidity;

[0023] determining a dehumidification correction coefficient according to the relative humidity difference value;

[0024] determining the dehumidification correction temperature based on the dehumidification correction coefficient.

[0025] The dehumidification correction temperature is adjusted by the relative humidity difference value, and the water chiller can adjust the environment humidity within a preset target range according to the dehumidification correction temperature, so that the dehumidification temperature of the water chiller is more reasonable and accurate, thereby improving the energy efficiency of the water chiller.

[0026] Optionally, the dehumidification correction coefficient is determined according to the relative humidity difference value, including:

[0027] It is judged whether the relative humidity difference value is less than or equal to a first preset difference threshold value, and if the relative humidity difference value is less than or equal to the first preset difference threshold value, the dehumidification correction coefficient is set to an initial dehumidification correction coefficient.

[0028] If the relative humidity difference value is greater than the first preset difference threshold value, the dehumidification correction coefficient is increased by a preset coefficient amplitude for each increase of the preset humidity amplitude.

[0029] The dehumidification correction coefficient is adjusted by calculating the relative humidity difference value, the dehumidification correction temperature can be dynamically determined according to the relative humidity difference value, so that the water chiller can dynamically adjust the dehumidification correction temperature according to the environment change, thereby enhancing the flexibility of the water chiller.

[0030] Optionally, the calculation formula of the dehumidification correction temperature is as follows:

[0031]

[0032] wherein, is the dehumidification correction temperature, is the dehumidification correction coefficient, β is a water supply temperature allowed upper limit bias constant.

[0033] Optionally, the method further includes obtaining a value of a dynamic adjustment weight coefficient based on the relative humidity difference value.

[0034] The outlet water temperature correction value is calculated by the following formula:

[0035] =

[0036] wherein, K is a weight coefficient, the value range of K is 0-100%, and the value of K is determined according to the relative humidity difference value. represents the cold load correction temperature.

[0037] Optionally, the method further includes obtaining a value of a dynamic adjustment weight coefficient based on the relative humidity difference value.

[0038] The weight coefficient K is initialized;

[0039] updating the relative humidity difference value every preset adaptive adjustment time interval ;

[0040] obtaining a previously calculated relative humidity difference value , determining whether the current relative humidity difference value is greater than a second preset difference threshold value, if the current relative humidity difference value is greater than the second preset difference threshold value and greater than or equal to the previously calculated relative humidity difference value , the weight coefficient K is increased by a first preset amplitude until the weight coefficient is increased by a maximum preset amplitude;

[0041] if the current relative humidity difference value is less than or equal to the second preset difference threshold value, the weight coefficient K is decreased by a second preset amplitude until the weight coefficient is decreased by a minimum preset amplitude;

[0042] if the current relative humidity difference value is greater than the second preset difference threshold value and less than the previously calculated relative humidity difference value , the weight coefficient K remains unchanged.

[0043] By dynamically adjusting the weight coefficient K, the chiller unit can more accurately adjust the dehumidification performance of the chiller unit according to the real-time change of the environmental humidity, so that the environmental humidity can be maintained within a preset range. When the environmental humidity decreases, the weight of the dehumidification correction temperature is reduced by reducing the value of the weight coefficient K, so that the dehumidification correction temperature is more in line with the actual operation requirements.

[0044] Optionally, the calculation formula of the chilled water outlet temperature target value is:

[0045]

[0046] wherein, is a preset supply water temperature target value under standard working conditions, is the chilled water outlet temperature target value.

[0047] According to a second aspect of the present application, a dynamic adaptive chiller unit energy-saving adjustment system is provided, the system comprising:

[0048] an acquisition module for acquiring the return water flow, return water temperature and supply water temperature of the chilled water;

[0049] a cold load calculation module for calculating the current cold load of the chiller unit based on the return water flow, return water temperature and supply water temperature;

[0050] a cold load correction temperature acquisition module for acquiring the maximum cold load of the chiller unit and determining the cold load correction temperature according to the maximum cold load and the current cold load.

[0051] a dehumidification correction temperature obtaining module configured to obtain a preset target relative humidity and an actual average relative humidity of a cooling environment corresponding to the chiller, and determine a dehumidification correction temperature according to the preset target relative humidity and the actual average relative humidity;

[0052] a water outlet temperature correction value obtaining module configured to determine a water outlet temperature correction value based on the cooling load correction temperature and the dehumidification correction temperature;

[0053] a target temperature obtaining module configured to correct a preset standard operating condition water supply temperature according to the water outlet temperature correction value to obtain a chilled water outlet temperature target value;

[0054] an adjusting module configured to adjust the chilled water outlet temperature of the chiller according to the chilled water outlet temperature target value.

[0055] According to a third aspect of the present application, an electronic device is provided, comprising:

[0056] a memory configured to store one or more computer programs;

[0057] a processor, when the one or more computer programs are executed by the processor, implements the dynamic adaptive chiller energy-saving adjustment method of the first aspect.

[0058] According to a fourth aspect of the present application, a computer readable storage medium is provided, the computer readable storage medium stores computer instructions, the computer instructions are used to make the processor execute to implement the dynamic adaptive chiller energy-saving adjustment method of the first aspect.

[0059] Based on any one of the above aspects, the dynamic adaptive chiller energy-saving adjustment method and system provided by the embodiments of the present application have the following beneficial effects compared with the prior art:

[0060] 1. By calculating the cooling load of the chiller in real time and comparing it with the maximum cooling load to obtain the cooling load correction temperature, and considering the difference between the actual average relative humidity and the preset target relative humidity to determine the dehumidification correction temperature, the adjustment of the water outlet temperature not only meets the refrigeration demand but also takes into account the dehumidification effect, which can better meet the actual operation demand, avoids the situation that the traditional fixed operating condition leads to excessive refrigeration and high energy consumption or the dehumidification capacity of the terminal equipment of the chiller is insufficient to affect the comfort of the user, makes the air conditioning system run in a suitable state, not only improves the overall energy efficiency of the air conditioning system and improves the comfort experience of the user, but also effectively reduces the energy consumption.

[0061] 2, The dynamic adaptive chiller energy-saving regulation method and system provided by the embodiment of the application can automatically regulate the chilled water outlet temperature according to different cold and wet loads in the environment, without manual intervention, has wide applicability, can flexibly cope with use requirements in various scenes, and can achieve significant energy-saving effect in scenes such as rail transit, and through test verification, the annual comprehensive energy-saving effect can reach 18%. BRIEF DESCRIPTION OF DRAWINGS

[0062] Figure 1 A dynamic adaptive chiller energy-saving regulation method flowchart for the embodiment of the application.

[0063] Figure 2 A dehumidification correction coefficient specific determination method flowchart for the embodiment of the application.

[0064] Figure 3 A weight coefficient adjustment flowchart for the embodiment of the application.

[0065] Figure 4 A dynamic adaptive chiller energy-saving regulation system structure diagram for the embodiment 2 of the application.

[0066] Figure 5 A schematic application scene diagram of the dynamic adaptive chiller energy-saving regulation method provided by the embodiment of the application.

[0067] Figure 6 A structure diagram of the electronic device provided by the embodiment of the application. DETAILED DESCRIPTION

[0068] The drawings of the application are only used for illustrative description, and cannot be understood as a limitation of the application. In order to better illustrate the following embodiments, some components in the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0069] In order to enable personnel in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present application.

[0070] It should be noted that the terms "first", "second", and the like in the description and in the claims of the present application and above-described accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0071] Embodiment 1

[0072] The present embodiment provides a technical solution that can solve the above problems. The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0073] Exemplarily, an application scenario schematic diagram of the dynamic adaptive chiller energy-saving regulation method provided by the embodiments of the present application is shown. As shown in the figure, Figure 5 The application scenario at least includes a server 100 and a terminal 200 that can communicate with the server 100, the server 100 has a data processing function; the terminal 200 has a data display function, and can also have a control function.

[0074] It can be understood that the server 100 can be an independent electronic device, or a cluster composed of multiple electronic devices; the terminal 200 can be a smart phone terminal, a personal computer, a tablet computer, a vehicle-mounted terminal, etc., but is not limited thereto.

[0075] In an implementable manner, the server 100 and the terminal 200 can respectively execute the dynamic adaptive chiller energy-saving regulation method provided by the embodiments of the present application, or alternatively, the dynamic adaptive chiller energy-saving regulation method provided by the embodiments of the present application is partially executed in the server 100 and partially executed in the terminal 200.

[0076] As shown in the figure, Figure 1 The present embodiment provides a dynamic adaptive chiller energy-saving regulation method, which can include the following steps:

[0077] S110, obtaining the return water flow, return water temperature and supply water temperature of chilled water.

[0078] In the implementation process, the supply water temperature T1 and the return water temperature T2 of the chilled water can be measured by installing temperature measuring instruments such as high-precision PT1000 temperature transmitters on the chilled water supply pipe and the return pipe of the water chiller.

[0079] S120, calculating the current cooling load of the water chiller based on the return water flow, the return water temperature and the supply water temperature.

[0080] After obtaining the parameters such as the return water flow, the return water temperature and the supply water temperature in real time, the current cooling load of the water chiller can be calculated according to these parameters, and the calculation formula of the current cooling load is as follows:

[0081] = c× ×v×(T2 - T1)

[0082] wherein, is the current cooling load of the water chiller, v is the return water flow of the chilled water, is the density of the chilled water, c is the specific heat capacity of the chilled water, T2 is the return water temperature of the chilled water, and T1 is the supply water temperature of the chilled water.

[0083] In the implementation process, the value of the specific heat capacity c of the chilled water can be 4.186 kJ / (kg·℃), the unit of the return water flow v can be converted into cubic meters per hour (m³ / h), and the density of the chilled water can be 1000 kg / m³.

[0084] By obtaining various parameters of the water chiller in real time, the current cooling load of the water chiller can be more accurately calculated according to the return water flow, the supply water temperature and the return water temperature.

[0085] S130, obtaining the maximum cooling load of the water chiller, and calculating the cooling load correction temperature according to the maximum cooling load and the current cooling load.

[0086] In this embodiment, the maximum cooling load of the water chiller can be determined by obtaining the rated parameters of the water chiller, can also be obtained by historical operation and maintenance data, and can also be determined by field test. It can be understood that this is only an exemplary description of the determination method of the maximum cooling load , and does not limit the determination method.

[0087] It can be understood that in the water chiller, if the water supply temperature is too low, it may cause the increase of energy consumption of the water chiller and the aggravation of equipment wear and tear; if the water supply temperature is too high, it may not meet the load demand, resulting in poor refrigeration effect, therefore, the water supply temperature of the chilled water in the water chiller needs to be controlled within a certain range.

[0088] Let the water supply temperature allowable upper limit deviation constant of the water chiller be β , that is, the maximum allowable deviation of the water supply temperature of the water chiller in the normal operation range is β , β The unit of may be ℃, then the calculation formula of the cooling load correction value is as follows:

[0089]

[0090] Among them, is the maximum cooling load, is the current cooling load.

[0091] In the specific implementation process, the water supply temperature allowable upper limit deviation constant β of the water chiller can be determined according to the actual situation and refrigeration demand of the water chiller. For example, the water supply temperature allowable upper limit deviation constant β of the water chiller is set to 5℃, then the calculation formula of the cooling load correction value is = , then according to the formula, the correction range of the cooling load correction value is 0~5℃.

[0092] S140, obtain a preset target relative humidity and an actual average relative humidity of a cooling environment corresponding to the water chiller, and determine a dehumidification correction temperature according to the preset target relative humidity and the actual average relative humidity.

[0093] In the embodiment, the actual average relative humidity can be obtained by installing a humidity sensor in the cooling environment corresponding to the water chiller to measure the ratio of the actual water vapor content in the air of the cooling environment to the saturated water vapor content at the current temperature. The preset target relative humidity can be flexibly set according to actual demand, for example, in summer, the preset target relative humidity can be set to 40%, or other values, which are not limited in the embodiment. After obtaining the preset target relative humidity and the actual average relative humidity, the relative humidity difference between the average relative humidity and the preset target relative humidity is calculated, that is, = preset target relative humidity- actual average relative humidity. After calculating the relative humidity difference , the dehumidification correction coefficient can be determined according to the relative humidity difference . Then, based on the dehumidification correction system The dehumidification correction temperature is determined by the number of parameters. For example... Figure 2 As shown, the dehumidification correction factor The specific determination method is as follows:

[0094] A1. Determine the relative humidity difference. Whether the relative humidity difference is less than or equal to a first preset difference threshold; if the relative humidity difference is less than or equal to the first preset difference threshold, then the dehumidification correction coefficient is applied. Set as the initial dehumidification correction factor; for example, the first preset difference threshold can be set to 0, and the initial dehumidification correction factor can be set to 0%;

[0095] A2, if the relative humidity difference value If the relative humidity difference is greater than a first preset difference threshold, then the relative humidity difference... For each increase in the preset humidity level, the dehumidification correction factor... A preset coefficient range is added to the initial dehumidification correction coefficient; for example, the preset coefficient range can be set to 1%, 2%, 4%, or other percentage values, and the preset humidity range can also be set to 1%, 5%, or other percentage values. For example, assuming the initial dehumidification correction coefficient is set to 0%, and the first preset difference threshold is 0, if the relative humidity difference... The value is 20%. When the preset coefficient range is set to 1%, 2%, or 4%, then the corresponding dehumidification correction coefficient is... They are 2%, 4% and 8% respectively.

[0096] In a preferred embodiment, the dehumidification correction temperature is determined. The formula is as follows:

[0097]

[0098] in, Temperature correction for dehumidification This is the dehumidification correction factor. This is the bias constant representing the upper limit of the allowable water supply temperature.

[0099] For example, assuming a preset target relative humidity of 50%, and the current average relative humidity of the environment is 70%, the chiller unit's allowable upper limit deviation constant for water supply temperature is... The temperature is 5℃, the initial dehumidification correction coefficient is set to 0%, the first preset difference threshold is 0, and the preset coefficient amplitude is set to 5%, then the relative humidity difference is... =70%-50%, then the dehumidification correction factor The value is 40%, therefore, the dehumidification correction temperature value... = -5℃ x 40% = -2℃.

[0100] S150, determine the outlet water temperature correction value based on the cooling load correction temperature and the dehumidification correction temperature.

[0101] After obtaining the cooling load correction temperature and the dehumidification correction temperature , the outlet water temperature correction value can be calculated according to the two correction temperatures. The specific calculation formula of the outlet water temperature correction value is as follows:

[0102] = x (1-K) + x (1+K)

[0103] Wherein, K is a weight coefficient, and the value range of K is 0-100%.

[0104] In the specific implementation process, the value of the dynamically adjusted weight coefficient K can be obtained based on the relative humidity difference. As shown in the figure, obtaining the value of the dynamically adjusted weight coefficient K includes: Figure 3

[0105] B1, initialize the weight coefficient K;

[0106] In this embodiment, the value range of the weight coefficient K is [0-1].

[0107] B2, update the relative humidity difference every preset adaptive adjustment time interval.

[0108] In the specific implementation process, the preset adaptive adjustment time interval can be set to 20 minutes or 30 minutes, or other time intervals. The specific value of the adaptive adjustment time interval can be set according to the actual situation, which is only exemplary here.

[0109] B3, obtain the relative humidity difference calculated last time, and determine whether the current relative humidity difference is greater than the second preset difference threshold. If the current relative humidity difference is greater than the second preset difference threshold and greater than or equal to the relative humidity difference calculated last time, the weight coefficient K increases by a first preset amplitude until the maximum preset amplitude is reached.

[0110] ​For example, the first preset amplitude can be set to 5%, the maximum preset amplitude can be set to 100% or other values greater than 0 and less than 100%. When the weight coefficient K increases to be greater than or equal to the maximum preset amplitude value, the weight coefficient K should be the maximum preset amplitude value.

[0111] B4, if the current relative humidity difference value is less than or equal to the second preset difference threshold value, the weight coefficient K is reduced by the second preset amplitude until the weight coefficient is reduced by the minimum preset amplitude.

[0112] For example, the second preset difference threshold value can be set to 0, the second preset amplitude can be set to 5%, and the minimum preset amplitude can be set to 0%. Similarly, when the weight coefficient K is reduced to be less than or equal to the minimum preset amplitude, the weight coefficient K should be the minimum preset amplitude.

[0113] B5, if the current relative humidity difference value is greater than the second preset difference threshold value and less than the relative humidity difference value calculated last time, the weight coefficient K remains unchanged.

[0114] S160, correcting the preset standard working condition water supply temperature according to the outlet water temperature correction value to obtain a chilled water outlet water temperature target value.

[0115] In this embodiment, the preset standard working condition water supply temperature target value can be corrected according to the outlet water temperature correction value to obtain a chilled water outlet water temperature target value. The calculation formula of the chilled water outlet water temperature target value is:

[0116]

[0117] wherein, is the preset standard working condition water supply temperature target value, is the chilled water outlet water temperature target value. In the specific implementation process, the value of the outlet water temperature correction value can be flexibly set according to actual needs. For example, in the subway and other rail transit scenarios, the standard working condition water supply temperature target value can be set to 7℃.

[0118] For example, assuming that the standard working condition water supply temperature target value is 7℃, and the calculation result is = 3℃, = -2℃, and the weight coefficient K value is 10%, the outlet water temperature correction value = 3℃×0.9 + -2℃×1.1 = 0.5℃, and then the chilled water outlet water temperature target value is: = 7℃ + = 7.5℃;

[0119] S170, adjusting the chilled water outlet temperature of the water chiller according to the chilled water outlet temperature target value.

[0120] In the implementation process, in order to ensure the stability of the water chiller, an adaptive adjustment time interval can be preset, and the dehumidification load correction value and the cooling load correction value are calculated every preset adaptive adjustment time. For example, in a specific way, the adaptive adjustment time interval is detected once every 20 minutes by default, and can also be adjusted according to the specific use scene.

[0121] In an optional embodiment, when the water chiller is started for the first time, the chilled water outlet temperature can be determined according to the chilled water supply temperature target value under the standard working condition After a period of stable operation, the dynamic adaptive water chiller energy-saving adjustment method in the present application can be implemented, which can more accurately calculate the cooling load demand of the cooling environment of the water chiller, and at the same time, the operation of the terminal equipment that needs to be cooled by the water chiller also gradually tends to be stable, reaching a whole steady state, and further improving the accuracy of the adjustment.

[0122] Embodiment 2

[0123] Figure 4 As shown, the embodiment of the present application also provides a dynamic adaptive water chiller energy-saving adjustment system 610, which comprises:

[0124] The acquisition module 611 is configured to acquire the return water flow, return water temperature and supply water temperature of the chilled water.

[0125] In the embodiment, the acquisition module 611 can be configured to perform Figure 2 The specific description of the acquisition module 611 can refer to the description of step S110.

[0126] The cooling load calculation module 612 is configured to calculate the current cooling load of the water chiller based on the return water flow, return water temperature and supply water temperature.

[0127] In the embodiment, the cooling load calculation module 612 can be configured to perform Figure 2 The specific description of the cooling load calculation module 612 can refer to the description of step S120.

[0128] The cooling load correction temperature acquisition module 613 is configured to acquire the maximum cooling load of the water chiller, and determine the cooling load correction temperature according to the maximum cooling load and the current cooling load.

[0129] In the embodiment, the cold load correction temperature acquisition module 613 can be configured to perform Figure 2 The specific description of the cold load correction temperature acquisition module 613 can refer to the description of step S130.

[0130] The dehumidification correction temperature acquisition module 614 is configured to acquire a preset target relative humidity and an actual average relative humidity of a cooling environment corresponding to the water chiller, and determine a dehumidification correction temperature according to the preset target relative humidity and the actual average relative humidity.

[0131] In the embodiment, the dehumidification correction temperature acquisition module 614 can be configured to perform Figure 2 The specific description of the dehumidification correction temperature acquisition module 614 can refer to the description of step S140.

[0132] The outlet water temperature correction value acquisition module 615 is configured to determine an outlet water temperature correction value based on the cold load correction temperature and the dehumidification correction temperature.

[0133] In the embodiment, the outlet water temperature correction value acquisition module 615 can be configured to perform Figure 2 The specific description of the outlet water temperature correction value acquisition module 615 can refer to the description of step S150.

[0134] The target temperature acquisition module 616 is configured to correct a preset standard working condition water supply temperature according to the outlet water temperature correction value to obtain a chilled water outlet temperature target value.

[0135] In the embodiment, the outlet water temperature correction value acquisition module 616 can be configured to perform Figure 2 The specific description of the outlet water temperature correction value acquisition module 616 can refer to the description of step S160.

[0136] The adjustment module 617 is configured to adjust the chilled water outlet temperature of the water chiller according to the chilled water outlet temperature target value.

[0137] In the embodiment, the adjustment module 617 can be configured to perform Figure 2 The specific description of the adjustment module 617 can refer to the description of step S170.

[0138] It can be understood that the system embodiments and the method embodiments described above can correspond to each other, and similar descriptions of the system embodiments can refer to the method embodiments. To avoid repetition, this will not be repeated here. The dynamic self-adaptive chiller unit energy-saving adjustment system provided by the embodiments of the present application can execute the dynamic self-adaptive chiller unit energy-saving adjustment method provided by any embodiment of the present application, and has the corresponding function modules and beneficial effects of executing the method. The function modules of the dynamic self-adaptive chiller unit energy-saving adjustment system can be realized by hardware, can be realized by software instructions, and can also be realized by a combination of hardware and software modules.

[0139] Specifically, the steps of the method embodiments of the present application can be completed by the integrated logic circuit of hardware in the processor and / or software instructions. The steps of the dynamic self-adaptive chiller unit energy-saving adjustment method of the embodiments of the present application can be directly embodied as hardware coding processor execution completion, or executed by a combination of hardware and software modules in the coding processor. Alternatively, the software module can be located in a random memory, a read-only memory, a programmable read-only memory, a flash memory, an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory, and combines the hardware to complete the steps in the above method embodiments.

[0140] The embodiments of the present application provide an electronic device 710, the structure of which is shown in Figure 6 The electronic device 710 can be the server 100 or the terminal 200 shown in the embodiments of the present application. Figure 5

[0141] As shown in Figure 6 The electronic device 710 includes a memory 711, a processor 712, a communication module 713, and an input / output interface 714, etc. Optionally, the memory 711, the processor 712, the communication module 713, and the input / output interface 714 can be connected and communicated through the bus 715.

[0142] The memory 711 is used to store one or more computer programs, and transmit the code of the computer program to the processor 712; when the one or more computer programs are executed by the processor 712, the dynamic self-adaptive chiller unit energy-saving adjustment method in the embodiments of the present application is realized.

[0143] ​Optionally, the electronic device 710 can be connected to a network through the communication module 713 to communicate with other devices such as terminals or servers through the network to realize the interaction of data. The electronic device 710 can be various forms of digital computers, exemplarily such as desktop computers, servers, workstations, mainframe computers or other types of computers. The electronic device 710 can also be various forms of mobile terminals, exemplarily such as smart phones, tablet computers, wearable devices (such as helmets, glasses, watches, etc.) and other similar mobile terminals.

[0144] Optionally, the electronic device 710 can connect the required input / output devices such as keyboards, display devices, etc. through the input / output interface 714, and the electronic device 710 itself can have a display device and can also be externally connected to other display devices through the input / output interface 714. Optionally, storage devices such as hard disks, etc. can also be connected through the input / output interface 714, so that the data in the electronic device 710 can be stored in the storage devices or the data in the storage devices can be read, and the data in the storage devices can also be stored in the memory 711. It can be understood that the input / output interface 714 can be a wired interface or a wireless interface. According to different actual application scenarios, the devices connected with the input / output interface 714 can be a component of the electronic device 710 or an external device connected with the electronic device 710 when needed.

[0145] Optionally, the memory 711 can be a volatile memory and / or a non-volatile memory, the volatile memory can be a random access memory, etc., and the non-volatile memory can be a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory or a flash memory, etc.

[0146] Optionally, the computer program stored in the processor 712 can be divided into one or more modules, which are stored in the memory 711 and executed by the processor 712 to complete the method provided by the embodiment. The one or more modules can be a series of computer program instruction segments capable of completing a specific function, which are used to describe the execution process of the computer program in the electronic device 710.

[0147] Optionally, the processor 712 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 712 include, but are not limited to, a central processing unit, a graphics processing unit, a digital signal processor, various special-purpose artificial intelligence computing chips, various processors running machine learning model algorithms, and can also be any appropriate controller, microcontroller, processor, etc. The processor 712 executes various methods and processes of the embodiments, for example, a dynamic adaptive chiller energy-saving regulation method of the embodiments.

[0148] Optionally, the bus 715 can include a path for transmitting information. The bus 715 can be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. According to different functions, the bus 715 can be divided into an address bus, a data bus, a control bus, etc.

[0149] In an optional implementation, the embodiments also provide a computer storage medium having a computer program stored thereon, which enables a computer to execute the method of the method embodiments when executed by the computer. Part or all of the computer program can be loaded and / or installed on the memory 711 of the electronic device 710. When the computer program is executed by the processor 712, one or more steps of the dynamic adaptive chiller energy-saving regulation method of the embodiments can be executed.

[0150] Optionally, the computer-readable storage medium can be a random access memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, etc.

[0151] Obviously, the above-described embodiments of the present application are merely examples for clearly illustrating the technical solutions of the present application, and are not intended to limit the specific implementation of the present application. Any modification, equivalent replacement, and improvement made within the spirit and principle of the claims of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A dynamic self-adaptive chiller energy-saving adjustment method, characterized in that, The method comprises: obtaining the return water flow, return water temperature and supply water temperature of chilled water; calculating the current cooling load of the chiller unit based on the return water flow, return water temperature and supply water temperature; obtaining the maximum cooling load of the chiller unit, and determining the cooling load correction temperature according to the maximum cooling load and the current cooling load; obtaining the preset target relative humidity and the actual average relative humidity of the cooling environment corresponding to the chiller unit, and determining the dehumidification correction temperature according to the preset target relative humidity and the actual average relative humidity; determining the outlet water temperature correction value based on the cooling load correction temperature and the dehumidification correction temperature; correcting the preset standard working condition supply water temperature according to the outlet water temperature correction value to obtain the chilled water outlet water temperature target value; adjusting the chilled water outlet water temperature of the chiller unit according to the chilled water outlet water temperature target value.

2. The method according to claim 1, wherein, The calculation formula of the current cooling load is as follows: = c x x v x (T2 - T1) wherein, is the current cooling load, v is the chilled water return flow rate, is the chilled water density, c is the specific heat capacity of the chilled water, T2 is the chilled water return temperature, and T1 is the chilled water supply temperature.

3. The method of claim 2, wherein the method further comprises: The cold load correction temperature The calculation formula is specifically: wherein, is a water supply temperature allowable upper limit bias constant, is the maximum cooling load, is the current cooling load.

4. The method of claim 1, wherein the method further comprises: The dehumidification correction temperature is determined according to the preset target relative humidity and the actual average relative humidity, comprising: calculating the relative humidity difference between the actual average relative humidity and the preset target relative humidity; determining the dehumidification correction coefficient according to the relative humidity difference; determining the dehumidification correction temperature based on the dehumidification correction coefficient.

5. The method of claim 4, wherein the step of adjusting the capacity of the chiller comprises adjusting the capacity of the chiller based on the temperature of the chilled water. The dehumidification correction coefficient is determined according to the relative humidity difference, comprising: determining whether the relative humidity difference is less than or equal to a first preset difference threshold, and if the relative humidity difference is less than or equal to the first preset difference threshold, setting the dehumidification correction coefficient as an initial dehumidification correction coefficient; if the relative humidity difference is greater than the first preset difference threshold, the dehumidification correction coefficient is increased by a preset coefficient amplitude for each increase of a preset humidity amplitude.

6. The method according to claim 4 or 5, wherein, The calculation formula of the dehumidification correction temperature is as follows: wherein, is a dehumidification correction temperature, is a dehumidification correction coefficient, β is a water supply temperature allowable upper limit bias constant.

7. The method of claim 6, wherein the step of adjusting the capacity of the chiller comprises adjusting the capacity of the chiller based on the temperature of the chilled water. The method further comprises obtaining the value of the dynamic adjustment weight coefficient based on the relative humidity difference; The outlet water temperature correction value Specifically, it is calculated by the following formula: = Wherein, K is a weight coefficient, the value range of K is 0~100%, represents the cold load correction temperature.

8. The method of claim 7, wherein the step of adjusting the capacity of the chiller comprises adjusting the capacity of the chiller based on the temperature of the chilled water. The value of the dynamic adjustment weight coefficient is obtained based on the relative humidity difference, comprising: initializing the weight coefficient K; updating the relative humidity difference every preset adaptive adjustment time interval ; obtaining a relative humidity difference value calculated last time , judging whether the current relative humidity difference value is greater than a second preset difference threshold value, if the current relative humidity difference value is greater than the second preset difference threshold value and greater than or equal to the relative humidity difference value calculated last time , the weight coefficient K increases by a first preset amplitude until a maximum preset amplitude is reached. If the current relative humidity difference value is less than or equal to a second preset difference threshold value, the weight coefficient K is reduced by a second preset amplitude until the weight coefficient is reduced by a minimum preset amplitude. If the current relative humidity difference value is greater than a second preset difference threshold value and less than a previously calculated relative humidity difference value , the weight coefficient K remains unchanged.

9. The method of claim 8, wherein the step of adjusting the capacity of the chiller comprises adjusting the capacity of the chiller based on the temperature of the chilled water. The calculation formula of the chilled water outlet water temperature target value is as follows: wherein, is a preset chilled water supply temperature target value under standard working conditions, is a chilled water outlet temperature target value.

10. A dynamic adaptive chiller energy saving regulation system, characterized in that, The system comprises: an obtaining module configured to obtain the return water flow, return water temperature and supply water temperature of chilled water; a cooling load calculation module configured to calculate the current cooling load of the chiller unit based on the return water flow, return water temperature and supply water temperature; a cooling load correction temperature obtaining module configured to obtain the maximum cooling load of the chiller unit, and determine the cooling load correction temperature according to the maximum cooling load and the current cooling load; a dehumidification correction temperature obtaining module configured to obtain the preset target relative humidity and the actual average relative humidity of the cooling environment corresponding to the chiller unit, and determine the dehumidification correction temperature according to the preset target relative humidity and the actual average relative humidity; an outlet water temperature correction value obtaining module configured to determine the outlet water temperature correction value based on the cooling load correction temperature and the dehumidification correction temperature; a target temperature obtaining module configured to correct the preset standard working condition supply water temperature according to the outlet water temperature correction value to obtain the chilled water outlet water temperature target value; an adjusting module configured to adjust the chilled water outlet water temperature of the chiller unit according to the chilled water outlet water temperature target value.

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