Water pump selection method, system, equipment and storage medium

Abstract

The embodiments of the present application disclose a water pump selection method, system, device, and storage medium, which relate to the field of water pump technology. The method includes: obtaining a plurality of water pumps to be selected and an operating characteristic curve of each water pump to be selected; determining the flow rate operating point of each water pump to be selected corresponding to a preset water pump demand flow rate from the operating characteristic curve of each water pump to be selected; obtaining the operating parameters of the flow rate operating point of each water pump to be selected; determining the water pump selection efficiency of each water pump to be selected based on the preset water pump demand flow rate and the operating parameters of the flow rate operating point of each water pump to be selected; and determining a target water pump from a plurality of water pumps to be selected based on the water pump selection efficiency of each water pump to be selected. The present application can determine a target water pump from a plurality of water pumps to achieve water pump selection.

Description

Technical Field

[0001] The present application relates to the field of water pump technology, and in particular to a water pump selection method, system, equipment and storage medium. Background Art

[0002] Water pump selection can be based on specific usage scenarios, needs and working conditions to select the appropriate type and specification of water pump to meet the requirements of actual application.

[0003] In the design of fluid distribution systems with multiple pumps and multiple heat exchangers, traditional pump selection methods typically focus on the full-load operating point, calculating the pipeline distribution resistance and required flow rate at full load to select the pump. However, given that large-scale cooling and heating systems operate mostly at sub-full-load operating points, pumps selected using traditional pump selection methods consume high energy when operating in fluid distribution systems for extended periods.

[0004] It can be seen that the traditional water pump selection method is difficult to adapt to the requirements of non-full load operation, resulting in a mismatch between the water pump selection and the actual operating conditions and high energy consumption of the fluid distribution system during long-term operation. It is urgent to develop new selection methods to achieve accurate water pump selection and improve the economic efficiency and reliability of fluid distribution system operation. Summary of the Invention

[0005] In view of this, one of the purposes of this application is to provide a water pump selection method, a water pump selection system, an electronic device and a computer-readable storage medium, which can achieve accurate selection of water pumps and improve the economy and reliability of the operation of the fluid distribution system.

[0006] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0007] In a first aspect, an embodiment of the present application provides a method for selecting a water pump, the method comprising:

[0008] Obtaining a number of water pumps to be selected and an operating characteristic curve of each water pump to be selected;

[0009] Determine the flow rate operating point of each candidate water pump corresponding to the preset water pump demand flow rate from the operating characteristic curve of each candidate water pump;

[0010] Obtaining the operating parameters of the flow operating point of each water pump to be selected;

[0011] Determine the water pump selection efficiency of each candidate water pump based on the preset water pump demand flow and the working parameters of the flow operating point of each candidate water pump;

[0012] A target water pump is determined from a number of candidate water pumps according to the water pump selection efficiency of each candidate water pump.

[0013] In a possible implementation, the preset water pump demand flow rate includes N water pump demand flow rates, and the working parameters include the water pump working head and the water pump working efficiency, where N is a positive integer;

[0014] Based on the preset pump demand flow rate and the pump working head and pump working efficiency of the flow working point of each candidate pump, the pump selection efficiency of each candidate pump is determined, including:

[0015] Based on the required flow rates of the N water pumps, a first preset operation is performed for each of the candidate water pumps to obtain an indicator set corresponding to each of the candidate water pumps, the indicator set including a first type of indicator value and a second type of indicator value;

[0016] The ratio between the first index value of each candidate water pump and the second index value of each candidate water pump is determined as the water pump selection efficiency of each candidate water pump;

[0017] The first preset operation includes:

[0018] For each of the M flow rate operating points corresponding to the required flow rates of each water pump, the product of the corresponding water pump working head and the water pump working efficiency is determined as a first index value, thereby obtaining M first index values, where M is a positive integer;

[0019] The product of the required flow rate of each water pump and the sum of its corresponding M first index values ​​is determined as the second index value, thereby obtaining N second index values;

[0020] Determine the sum of the N second index values ​​as the first category index value;

[0021] For each of the M flow rate operating points corresponding to the required flow rate of each water pump, the sum of the corresponding M water pump working heads is determined as the third index value to obtain N third index values;

[0022] The product of the required flow rate of each water pump and its corresponding third index value is determined as the fourth index value to obtain N fourth index values;

[0023] The sum of the N fourth index values ​​is determined as the second-category index value.

[0024] In a possible implementation, the preset water pump demand flow rate includes N water pump demand flow rates, and the working parameters include the water pump working head and the water pump working efficiency, where N is a positive integer;

[0025] Based on the preset pump demand flow rate and the pump working head and pump working efficiency of the flow working point of each candidate pump, the pump selection efficiency of each candidate pump is determined, including:

[0026] Based on the required flow rates of the N water pumps, a second preset operation is performed for each of the water pumps to be selected, so as to obtain a third type of indicator value corresponding to each of the water pumps to be selected;

[0027] The ratio between the third index value of each candidate water pump and the number of working points of the flow working point of each candidate water pump is determined as the water pump selection efficiency of each candidate water pump;

[0028] The second preset operation includes:

[0029] For each of the M flow rate operating points corresponding to the required flow rates of each water pump, the product of the corresponding water pump working head and the water pump working efficiency is determined as the fifth index value, thereby obtaining M fifth index values, where M is a positive integer;

[0030] The product of the required flow rate of each water pump and the sum of its corresponding M fifth index values ​​is determined as the fifth index value, thereby obtaining N sixth index values;

[0031] The sum of the N sixth index values ​​is determined as the third type index value.

[0032] In a possible implementation, determining a target water pump from a plurality of candidate water pumps according to the water pump selection efficiency of each candidate water pump includes:

[0033] Determine the pump selection efficiency with the largest value from the pump selection efficiencies of all the pumps to be selected;

[0034] The candidate water pump corresponding to the water pump selection efficiency with the largest value is determined as the target water pump.

[0035] In a possible implementation, after determining a target water pump from a plurality of candidate water pumps based on the water pump selection efficiency of each candidate water pump, the method further includes:

[0036] Determine a target flow rate operating point corresponding to a target demand flow rate from an operating characteristic curve of a target water pump;

[0037] Determine the target operating area corresponding to the target flow operating point in the operating characteristic curve of the target water pump;

[0038] According to the target demand flow and the target working area, a target control strategy is determined from multiple preset water pump control strategies.

[0039] In one possible implementation, the operating parameters include the operating head of the water pump;

[0040] Determine the target flow operating point corresponding to the target demand flow from the operating characteristic curve of the target water pump, including:

[0041] Determining at least one flow operating point corresponding to a target required flow from an operating characteristic curve of a target water pump;

[0042] When the working head of the water pump corresponding to each flow operating point is determined, the flow operating point corresponding to the water pump working head with the smallest value among the multiple water pump working heads is taken as the target flow operating point.

[0043] In one possible implementation, the target operating area includes a plurality of water pump operating frequency curves corresponding to preset water pump control strategies;

[0044] Based on the target demand flow and target operating area, the target control strategy is determined from multiple preset pump control strategies, including:

[0045] Determine a target water pump operating frequency curve having an intersection with a straight line corresponding to a target demand flow rate from water pump operating frequency curves corresponding to a plurality of preset water pump control strategies;

[0046] The preset water pump control strategy corresponding to the target water pump operation frequency curve is determined as the target control strategy.

[0047] In a second aspect, an embodiment of the present application provides a water pump selection system, the system comprising:

[0048] The first acquisition module is used to obtain a plurality of water pumps to be selected and the working characteristic curve of each water pump to be selected;

[0049] The first determination module is used to determine the flow rate operating point of each candidate water pump corresponding to the preset water pump demand flow rate from the operating characteristic curve of each candidate water pump;

[0050] The second acquisition module is used to obtain the working parameters of the flow working point of each water pump to be selected;

[0051] The second determining module is used to determine the water pump selection efficiency of each candidate water pump according to the preset water pump demand flow and the working parameters of the flow operating point of each candidate water pump;

[0052] The third determination module is used to determine a target water pump from a plurality of candidate water pumps according to the water pump selection efficiency of each candidate water pump.

[0053] In a third aspect, an embodiment of the present application provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and when the computer program is executed by the processor, it implements the water pump selection method provided in the first aspect.

[0054] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by one or more processors, the water pump selection method provided in the first aspect is implemented.

[0055] The embodiment of the present application provides a water pump selection method, which obtains a number of water pumps to be selected and the working characteristic curves of each water pump to be selected, and determines the flow operating point of each water pump to be selected corresponding to the preset water pump demand flow from the working characteristic curves of each water pump to be selected. Then, the working parameters of the flow operating point of each water pump to be selected are obtained, and the water pump selection efficiency of each water pump to be selected is determined based on the preset water pump demand flow and the working parameters of the flow operating point of each water pump to be selected. Finally, based on the water pump selection efficiency of each water pump to be selected, a suitable target water pump is determined from a number of water pumps to achieve accurate water pump selection, thereby operating the target water pump, which can reduce the energy consumption of the fluid distribution system during long-term operation and improve the economy and reliability of the fluid distribution system. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. It should be understood that the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0057] Figure 1 A flow chart of a water pump selection method provided in an embodiment of the present application.

[0058] Figure 2 A schematic diagram of an ice water distribution system involved in a water pump selection method provided in an embodiment of the present application.

[0059] Figure 3 A working characteristic curve involved in a water pump selection method provided in an embodiment of the present application.

[0060] Figure 4 Another working characteristic curve involved in a water pump selection method provided in an embodiment of the present application.

[0061] Figure 5 Another working characteristic curve involved in a water pump selection method provided in an embodiment of the present application.

[0062] Figure 6 Another working characteristic curve involved in a water pump selection method provided in an embodiment of the present application.

[0063] Figure 7 Another working characteristic curve involved in a water pump selection method provided in an embodiment of the present application.

[0064] Figure 8 Another working characteristic curve involved in a water pump selection method provided in an embodiment of the present application.

[0065] Figure 9 Another working characteristic curve involved in a water pump selection method provided in an embodiment of the present application.

[0066] Figure 10 A schematic diagram of the functional modules of a water pump selection system provided in an embodiment of the present application.

[0067] Figure 11 This is a diagram of the internal structure of an electronic device provided in an embodiment of the present application.

[0068] Explanation of Reference Numerals: 1. Chilled Water Distribution System Water Supply Main Pipe; 2. Water Pump Branch Switch Valve; 3. Pressure Gauge; 4. Y-Type Filter; 5. Flexible Joint; 6. Snap-Condensation Pipe; 7. Snap-Function Pipe; 8. Check Valve; 9. Flow Meter; 10. Plate Heat Exchanger; 11. Chilled Water Distribution System Return Main Pipe; 12. Ice Tank;

[0069] 1000. Water pump selection system; 1010. First acquisition module; 1020. First determination module; 1030. Second acquisition module; 1040. Second determination module; 1050. Third determination module. DETAILED DESCRIPTION

[0070] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0071] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0072] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0073] In various embodiments of the present application, the expression "or" or "at least one of A or / and B" includes any or all combinations of the words listed simultaneously. For example, the expression "A or B" or "at least one of A or / and B" may include A, may include B, or may include both A and B.

[0074] In the description of this application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the invented product is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on this application.

[0075] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0076] It should be noted that, in the absence of conflict, the features in the embodiments of this application can be combined with each other.

[0077] Furthermore, in the embodiments of the present application, the term "connection" may refer to "electrical connection" or "direct connection." "Electrical connection" may refer to a direct electrical connection between two components or an electrical connection between two components via one or more normally open tubes or other components.

[0078] In order to solve the technical problems in the background technology, the embodiments of the present application provide a water pump selection method, a water pump selection system, an electronic device, and a computer-readable storage medium. The water pump selection method provided in the embodiments of the present application is first introduced below.

[0079] See Figure 1 , Figure 1 This is a flow chart of a water pump selection method provided in an embodiment of the present application. This water pump selection method can be applied to water pump selection systems or electronic devices in the following embodiments. The electronic devices include personal computers, servers, mobile devices, cloud computing platforms, and supercomputers. The following describes this water pump selection method from the perspective of its application to electronic devices. The water pump selection method specifically includes the following steps 110 to 150.

[0080] Step 110 : obtaining a plurality of water pumps to be selected and an operating characteristic curve of each water pump to be selected.

[0081] Step 120 : determining the flow rate operating point of each candidate water pump corresponding to the preset pump demand flow rate from the operating characteristic curve of each candidate water pump.

[0082] Step 130: Obtain the operating parameters of the flow rate operating point of each candidate water pump.

[0083] Step 140 : determining the water pump selection efficiency of each candidate water pump according to the preset water pump demand flow rate and the working parameters of the flow rate working point of each candidate water pump.

[0084] Step 150 : determining a target water pump from a plurality of candidate water pumps according to the water pump selection efficiency of each candidate water pump.

[0085] The water pump selection method provided in the embodiment of the present application obtains a number of water pumps to be selected and the working characteristic curves of each water pump to be selected, and determines the flow operating point of each water pump to be selected corresponding to the preset water pump demand flow from the working characteristic curves of each water pump to be selected. Then, the working parameters of the flow operating point of each water pump to be selected are obtained, and the water pump selection efficiency of each water pump to be selected is determined based on the preset water pump demand flow and the working parameters of the flow operating point of each water pump to be selected. Finally, based on the water pump selection efficiency of each water pump to be selected, a suitable target water pump is determined from a number of water pumps to achieve accurate water pump selection, thereby operating the target water pump, which can reduce the energy consumption of the fluid distribution system during long-term operation and improve the economy and reliability of the fluid distribution system.

[0086] The following will be Figure 1 Each step of the method is described in detail.

[0087] In step 110, the electronic device may obtain several candidate water pumps and the operating characteristic curves of each candidate water pump. Based on the operating characteristic curves of the candidate water pumps, the electronic device may determine the water pump selection efficiency corresponding to the candidate water pumps in subsequent implementation steps. Based on the water pump selection efficiency corresponding to the candidate water pumps, the electronic device may determine the target water pump in subsequent implementation steps.

[0088] The aforementioned multiple water pumps to be selected may be water pumps provided to the electronic device at different stages for selection by the electronic device. The embodiment of the present application does not specifically limit the aforementioned different stages.

[0089] For example, the several water pumps to be selected may be water pumps provided to meet engineering design requirements during the water pump engineering design phase of the multi-heat exchanger-to-multi-pump group system of the district cooling system.

[0090] Alternatively, the several water pumps to be selected may be water pumps provided to meet the bidding and procurement requirements during the bidding and procurement phase for water pumps of the multi-heat exchanger multi-pump group system.

[0091] Alternatively, the several water pumps to be selected may be water pumps provided to meet actual operation requirements during the actual operation phase of the water pumps of the multi-heat exchanger multi-pump group system.

[0092] The plurality of water pumps to be selected may be water pumps of different types or of the same type but different models. For example, the plurality of water pumps to be selected may include three water pumps of the same type but different models, and the models are Model 1, Model 2, and Model 3 respectively.

[0093] To unify the description of applicable stages or scenarios after water pump selection, this embodiment and the following embodiments will introduce the water pump selection method from the actual water pump operation stage. However, it should be noted that whether in the aforementioned water pump engineering design stage, the aforementioned water pump bidding and procurement stage, or the aforementioned water pump actual operation stage, the operating energy consumption of the water pump in the multi-heat exchanger multi-pump system or the aforementioned fluid distribution system is one of the important evaluation indicators.

[0094] The above working characteristic curve is obtained based on an operation test of the water pump to be selected, and can actually reflect the working status of the water pump to be selected.

[0095] The working characteristic curves of the selected water pumps of different types or different signals are generally different.

[0096] For example, the operating characteristic curve may be used to reflect the correlation between the operating flow rate of the water pump and the operating head of the water pump.

[0097] For example, the operating characteristic curve may be used to reflect the correlation between the operating flow rate of the water pump, the operating head of the water pump, and the operating efficiency of the water pump.

[0098] The working flow rate of the above-mentioned water pump refers to the volume of liquid that the water pump can transport per unit time.

[0099] Generally speaking, different types of pumps, or different models of the same type, have different design flow rates (design flow here can be understood as the theoretical operating flow rate under the design parameters corresponding to the design). For example, centrifugal pumps, axial flow pumps, and mixed flow pumps have different operating principles and structural characteristics, and their corresponding design flow rates are generally different. Specifically, the design flow rate of axial flow pumps is higher, the design flow rate of centrifugal pumps is lower, and the design flow rate of mixed flow pumps is between the design flows of axial flow pumps and centrifugal pumps.

[0100] In addition, the size and speed of the impeller, a key component of the water pump, have a direct impact on the pump's operating flow rate. For example, the larger the impeller diameter and the higher the speed, the greater the pump's operating flow rate. The pressure difference between the pump's inlet and outlet, as well as the different properties of the liquid within the pump, can also affect the pump's operating flow rate. This embodiment will not be further elaborated on in detail.

[0101] In some embodiments, when a water pump selection request is detected, the electronic device may obtain the aforementioned plurality of water pumps to be selected and the operating characteristic curve of each water pump to be selected based on the water pump selection request.

[0102] Specifically, the electronic device can identify the water pump selection request and extract key features from the water pump selection request to determine the water pump model in the water pump selection request. The embodiment of the present application does not specifically limit the method used for extracting the key features.

[0103] In some embodiments, the electronic device pre-stores operating characteristic curves of water pumps of different types and models. After determining the water pump model in the water pump selection request, the electronic device can quickly determine the corresponding operating characteristic curve for the water pump model.

[0104] In some embodiments, when the working characteristic curve of the water pump to be selected is not stored in the electronic device, the electronic device may feedback an acquisition instruction to the requesting user of the water pump selection request. The acquisition instruction can be used to remind the requesting user to feedback the working characteristic curves of each model of the water pump to be selected in the water pump selection request.

[0105] In some embodiments, when the working characteristic curve of the water pump to be selected is not stored in the electronic device, the electronic device can perform simulation tests on different models of water pumps to be selected based on some existing fluid simulation software in the relevant technology to obtain the working characteristic curves of different models of water pumps to be selected.

[0106] In some embodiments, the electronic device may first perform a security check on the water pump selection request. If the security check result indicates that the check has passed, the electronic device may perform the above-mentioned identification and key feature extraction steps on the water pump selection request.

[0107] In some embodiments, the security verification may include at least one of identity verification and permission verification. Specifically, the electronic device performs identity verification on the water pump selection request to determine whether the identity of the requesting user corresponding to the water pump selection request is compliant. The electronic device performs permission verification on the water pump selection request to determine whether the requesting user has the corresponding permission to make the request.

[0108] In step 120, after determining the working characteristic curves of each candidate water pump, the electronic device can determine the flow operating point of the water pump corresponding to the preset water pump demand flow from each working characteristic curve. Based on the flow operating point, the electronic device can complete the calculation of the water pump selection efficiency of the subsequent candidate water pumps.

[0109] The preset water pump demand flow rate may be the flow rate that is used most frequently in the multi-heat exchanger to multi-pump group system or the aforementioned fluid distribution system, or may be understood as the most commonly used flow rate in the multi-heat exchanger to multi-pump group system or the fluid distribution system.

[0110] In some embodiments, the preset water pump demand flow rate includes one.

[0111] In some embodiments, the preset water pump demand flow rate includes multiple.

[0112] The flow operating point is the intersection of the line segment corresponding to the operating characteristic curve of the candidate water pump and the preset pump demand flow rate. The flow operating point can be used to reflect the pump head or pump efficiency corresponding to the preset pump demand flow rate.

[0113] In step 130 , after determining the flow rate operating point of the candidate water pump in the corresponding operating characteristic curve based on the aforementioned embodiment, the electronic device may determine the operating parameters corresponding to each flow rate operating point.

[0114] The above operating parameters are the parameters included in the operating characteristic curve of the water pump to be selected.

[0115] In some embodiments, the operating parameter includes at least one of a water pump operating flow rate, a water pump operating head, and a water pump operating efficiency.

[0116] To clearly describe the flow rate operating point of the selected water pump in step 120 and the working parameters of the flow rate operating point in step 130, please refer to Figure 2 , Figure 2 A schematic diagram of an ice water distribution system involved in a water pump selection method provided in an embodiment of the present application. Figure 2 The ice water distribution system includes the ice water distribution system water supply main pipe 1, the water pump branch switch valve 2, the pressure gauge 3, the Y-type filter 4, the flexible joint 5, the sudden contraction pipe 6, the sudden expansion pipe 7, the check valve 8, the flow meter 9, the plate heat exchanger 10, the ice water distribution system return water main pipe 11, the ice pool 12 and the water pump ( Figure 2 1#, 2#, 3#, 4#, and 5# are all water pumps). The ice water distribution system mainly consists of an ice pool 12, five parallel water pumps of the same model, and five parallel plate heat exchangers 10.

[0117] The five parallel-connected water pumps in the above-mentioned ice water distribution system have the same model and parameters, and the five parallel-connected plate heat exchangers have the same model and parameters.

[0118] Based on the above-mentioned ice water distribution system, the above-mentioned fluid simulation software is used to perform simulation tests on the selected water pump Pump1. Simulation tests are performed on one selected water pump Pump1 and one plate heat exchanger, respectively, to obtain the working characteristic curve S1 of the selected water pump Pump1. The curve S1 includes the working area of ​​1 selected water pump Pump1, the working area of ​​2 selected water pumps Pump1, the working area of ​​3 selected water pumps Pump1, the working area of ​​4 selected water pumps Pump1, and the working area of ​​5 selected water pumps Pump1.

[0119] It should be noted that the working characteristic curves of the water pumps to be selected in the embodiment of the present application are based on Figure 2 The ice water distribution system shown is obtained through simulation testing.

[0120] Although the above-mentioned ice water distribution system is shown to mainly consist of an ice tank, five parallel water pumps, and five parallel plate heat exchangers for illustrative purposes, and the five parallel water pumps and the five parallel plate heat exchangers are connected in series, the number of water pumps and plate heat exchangers may be reduced or increased according to actual needs, and all such arrangements are within the scope of protection of this application.

[0121] See Figure 3 , Figure 3 This is an operating characteristic curve involved in a water pump selection method provided in an embodiment of the present application. The operating head of the water pump in the operating characteristic curve can be simulated and calculated under different operating conditions, including different numbers of water pumps (1 to 5), different numbers of plate heat exchangers (1 to 5), and different water pump operating frequencies (25 Hz to 50 Hz).

[0122] For example, for the water pump to be selected, Pump1, the preset water pump demand flow includes the demand flow Q1 (1675 cubic meters per hour), and the working characteristic curve of the water pump to be selected, Pump1, is S1 (the horizontal axis of S1 represents the working flow, and the vertical axis of S1 represents the working head):

[0123] The intersection point between the straight line L1 corresponding to the demand flow Q1 in the working characteristic curve S1 and the working characteristic curve S1 includes P1, which means that the selected water pump Pump1 has only one flow operating point corresponding to the preset water pump demand flow Q1 in the working characteristic curve S1, namely the intersection point P1.

[0124] In the above example, when the preset water pump demand flow rates include Q1 and Q2 (1600 cubic meters per hour), the intersection points between the straight line L2 corresponding to the demand flow rate Q2 in the working characteristic curve S1 and the working characteristic curve S1 include P2, P3 and P4. This means that the selected water pump Pump1 has four flow operating points corresponding to the demand flow rates Q1 and Q2 in the working characteristic curve S1, namely the intersection points P1, P2, P3 and P4.

[0125] In the working characteristic curve S1 of the candidate water pump Pump1, taking the flow working point P1 as an example, the working parameters corresponding to P1 include at least one of a working flow of 1675 cubic meters per hour, a working head of 22.5 meters, and a working efficiency of 80%.

[0126] In step 140 , the electronic device may perform further calculations to obtain the pump selection efficiency of each candidate water pump after determining the preset water pump demand flow rate and the operating parameters of the flow rate operating point of each candidate water pump.

[0127] Taking the above-mentioned example of the candidate water pump Pump1 and the preset water pump demand flow including the demand flow rates Q1 and Q2, the electronic device can determine the pump selection efficiency of the candidate water pump Pump1 based on the four working flow rates, four working heads and four working efficiencies corresponding to the flow working points P1, P2, P3 and P4.

[0128] If the preset pump demand flow rate only includes one demand flow rate Q2, the electronic device can determine the pump selection efficiency of the candidate water pump Pump1 based on the three working flow rates, three working heads and three working efficiencies corresponding to the flow working points P2, P3 and P4.

[0129] If the preset pump demand flow rate includes more demand flow rates, and the flow operating points corresponding to the more demand flow rates exceed 3, then the pump selection efficiency of the candidate water pump Pump1 only needs to be determined based on the working head and working efficiency of each flow operating point. The embodiments of the present application are not given one by one here.

[0130] In some embodiments, for the candidate water pump Pump1, the electronic device may perform numerical calculations on the operating flow rate, operating head, and operating efficiency of each of the corresponding multiple flow operating points to obtain the pump selection efficiency of the candidate water pump Pump1. Accordingly, the same process is performed on each candidate water pump to obtain the pump selection efficiency of each candidate water pump.

[0131] It should be noted that when performing the same processing on each candidate water pump, it is necessary to ensure that the preset water pump demand flow rate is the same. That is, for candidate water pump Pump1, the flow operating point of the candidate water pump Pump1 under the demand flow rates Q1, Q2, and Q3 is determined from the operating characteristic curve S1 of the candidate water pump Pump1, and the water pump selection efficiency of the candidate water pump Pump1 is determined based on the relevant parameters of the determined flow operating point. Then, for candidate water pump Pump2, it is also necessary to determine the flow operating point of the candidate water pump Pump2 under the demand flow rates Q1, Q2, and Q3 from the operating characteristic curve S2 of the candidate water pump Pump2, and the water pump selection efficiency of the candidate water pump Pump2 is determined based on the relevant parameters of the determined flow operating point.

[0132] The operating characteristic curves S1 and S2 may be different, but the values ​​of Q1, Q2, and Q3 in S1 and those in S2 are the same. This improves the accuracy and reliability of determining the efficiency of several candidate pumps.

[0133] In step 150 , if the electronic device has determined the water pump selection efficiency of each candidate water pump in the above embodiment, it can select a target water pump based on several water pump selection efficiencies.

[0134] For example, the electronic device may determine the candidate water pump corresponding to the water pump selection efficiency with the largest numerical value among several water pump selection efficiencies as the target water pump.

[0135] For another example, when the cost of a water pump is taken into consideration, the electronic device may select a water pump with a numerically higher water pump selection efficiency and the lowest purchase cost among several water pump selection efficiencies as the target water pump.

[0136] See Figure 4 , Figure 4 Another working characteristic curve involved in a water pump selection method provided in an embodiment of the present application. Figure 4 Based on Figure 2 In the chilled water distribution system, when the operating frequencies of the water pumps are 25Hz, 30Hz, 35Hz, 40Hz, 45Hz and 50Hz respectively, the corresponding operating characteristic curves of the following number of water pumps and plate heat exchangers are turned on:

[0137] 1 water pump and 1 plate heat exchanger;

[0138] 1 water pump and 2 plate heat exchangers;

[0139] 1 water pump and 3 plate heat exchangers.

[0140] See Figure 5 , Figure 5 Another working characteristic curve involved in a water pump selection method provided in an embodiment of the present application. Figure 5 Based on Figure 2 In the chilled water distribution system, when the operating frequencies of the water pumps are 25Hz, 30Hz, 35Hz, 40Hz, 45Hz and 50Hz respectively, the corresponding operating characteristic curves of the following number of water pumps and plate heat exchangers are turned on:

[0141] 2 water pumps and 1 plate heat exchanger;

[0142] 2 water pumps and 2 plate heat exchangers;

[0143] 2 water pumps and 3 plate heat exchangers;

[0144] 2 water pumps and 4 plate heat exchangers;

[0145] 2 water pumps and 5 plate heat exchangers.

[0146] See Figure 6 , Figure 6 Another working characteristic curve involved in a water pump selection method provided in an embodiment of the present application. Figure 6 Based on Figure 2In the chilled water distribution system, when the operating frequencies of the water pumps are 25Hz, 30Hz, 35Hz, 40Hz, 45Hz and 50Hz respectively, the corresponding operating characteristic curves of the following number of water pumps and plate heat exchangers are turned on:

[0147] 3 water pumps and 1 plate heat exchanger;

[0148] 3 water pumps and 2 plate heat exchangers;

[0149] 3 water pumps and 3 plate heat exchangers;

[0150] 3 water pumps and 4 plate heat exchangers;

[0151] 3 water pumps and 5 plate heat exchangers.

[0152] See Figure 7 , Figure 7 Another working characteristic curve involved in a water pump selection method provided in an embodiment of the present application. Figure 7 Based on Figure 2 In the chilled water distribution system, when the operating frequencies of the water pumps are 25Hz, 30Hz, 35Hz, 40Hz, 45Hz and 50Hz respectively, the corresponding operating characteristic curves of the following number of water pumps and plate heat exchangers are turned on:

[0153] 4 water pumps and 2 plate heat exchangers;

[0154] 4 water pumps and 3 plate heat exchangers;

[0155] 4 water pumps and 4 plate heat exchangers;

[0156] 4 water pumps and 5 plate heat exchangers.

[0157] See Figure 8 , Figure 8 Another working characteristic curve involved in a water pump selection method provided in an embodiment of the present application. Figure 8 Based on Figure 2 In the chilled water distribution system, when the operating frequencies of the water pumps are 25Hz, 30Hz, 35Hz, 40Hz, 45Hz and 50Hz respectively, the corresponding operating characteristic curves of the following number of water pumps and plate heat exchangers are turned on:

[0158] 5 water pumps and 2 plate heat exchangers;

[0159] 5 water pumps and 3 plate heat exchangers;

[0160] 5 water pumps and 4 plate heat exchangers;

[0161] 5 water pumps and 5 plate heat exchangers.

[0162] above Figures 4 to 8 It can be found that based on the case of turning on different numbers of plate heat exchangers, the working characteristic curves corresponding to turning on 1 water pump, 2 water pumps, 3 water pumps, 4 water pumps, and 5 water pumps respectively enclose the corresponding water pump working area.

[0163] In a possible implementation, the preset water pump demand flow rate includes N water pump demand flow rates, and the working parameters include the water pump working head and the water pump working efficiency, where N is a positive integer;

[0164] Based on the preset pump demand flow rate and the pump working head and pump working efficiency of the flow working point of each candidate pump, the pump selection efficiency of each candidate pump is determined, including:

[0165] Based on the required flow rates of the N water pumps, a first preset operation is performed for each of the candidate water pumps to obtain an indicator set corresponding to each of the candidate water pumps, the indicator set including a first type of indicator value and a second type of indicator value;

[0166] The ratio between the first index value of each candidate water pump and the second index value of each candidate water pump is determined as the water pump selection efficiency of each candidate water pump;

[0167] The first preset operation includes:

[0168] For each of the M flow rate operating points corresponding to the required flow rates of each water pump, the product of the corresponding water pump working head and the water pump working efficiency is determined as a first index value, thereby obtaining M first index values, where M is a positive integer;

[0169] The product of the required flow rate of each water pump and the sum of its corresponding M first index values ​​is determined as the second index value, thereby obtaining N second index values;

[0170] Determine the sum of the N second index values ​​as the first category index value;

[0171] For each of the M flow rate operating points corresponding to the required flow rate of each water pump, the sum of the corresponding M water pump working heads is determined as the third index value to obtain N third index values;

[0172] The product of the required flow rate of each water pump and its corresponding third index value is determined as the fourth index value to obtain N fourth index values;

[0173] The sum of the N fourth index values ​​is determined as the second-category index value.

[0174] The embodiment of the present application obtains the water pump selection efficiency of each water pump to be selected by performing weighted average processing on the working efficiency of each water pump to be selected under a preset water pump demand flow rate, thereby being able to accurately and reliably implement water pump selection, so that the selected target water pump can operate in the fluid distribution system, thereby reducing the operating energy consumption of the fluid distribution system.

[0175] The required flow rates of the N pumps can be expressed as Q1, Q2, ..., Q n .

[0176] The first index value is the product of the pump head and the pump efficiency corresponding to the flow rate operating point. There are M first index values ​​corresponding to M flow rate operating points.

[0177] Taking the above-mentioned candidate water pump Pump1 as an example, in the characteristic working curve of the candidate water pump Pump1, the flow operating point corresponding to the water pump demand flow Q1 is P1 (Q1, H Q1-1 , η Q1-1 ), the flow operating point corresponding to the pump demand flow Q2 is P2 (Q2, H Q2-1 , η Q2-1 )、P3(Q2,H Q2-2 , η Q2-2 ) and P4 (Q2, H Q2-3 , η Q2-3 ).

[0178] For the water pump demand flow Q1 and the water pump demand flow Q2, the first indicator value includes:

[0179] H Q1-1 *η Q1-1 、H Q2-1 *η Q2-1 、H Q2-2 *η Q2-2 、H Q2-3 *η Q2-3 .

[0180] In this example, there are a total of 4 first indicator values. If there are M flow operating points, there are corresponding M first indicator values.

[0181] The second index value is the product of the water pump demand flow rate and the sum of the M first index values. N water pump demand flow rates correspond to N second index values.

[0182] Taking the above-mentioned candidate water pump Pump1 as an example, the second indicator value includes:

[0183] Q1* H Q1-1 *η Q1-1 、Q2*(H Q2-1 *η Q2-1 + H Q2-2 *η Q2-2 + HQ2-3 *η Q2-3 ).

[0184] In this example, there are 2 second index values ​​in total. If there are N water pumps with required flow rates, there will be N corresponding second index values.

[0185] The first index value is the sum of N second index values.

[0186] Taking the above-mentioned candidate water pump Pump1 and the water pump demand flow Q1 and the water pump demand flow Q2 as an example, the first type of index value (A) can be expressed as:

[0187] A=Q1*H Q1-1 *η Q1-1 + Q2*(H Q2-1 *η Q2-1 + H Q2-2 *η Q2-2 + H Q2-3 *η Q2-3 ).

[0188] The third index value is the sum of the pump working heads corresponding to the flow rate operating points corresponding to the pump demand flow rate. N pump demand flow rates correspond to N third index values.

[0189] Taking the above-mentioned candidate water pump Pump1 and the water pump required flow rate Q1 and the water pump required flow rate Q2 as an example, the third index value includes:

[0190] H Q1-1 、H Q2-1 + H Q2-2 + H Q2-3 .

[0191] The fourth index value is the product of the water pump required flow rate and the third index value. N water pump required flow rates correspond to N fourth index values.

[0192] Still referring to the above example, the fourth indicator value includes:

[0193] Q1* H Q1-1 、Q2*(H Q2-1 + H Q2-2 + H Q2-3 ).

[0194] The second index value is the sum of the N fourth index values.

[0195] Still referring to the above example, the second type of indicator value (B) can be expressed as:

[0196] B=Q1*H Q1-1 + Q2*(H Q2-1 + H Q2-2 + HQ2-3 ).

[0197] The pump selection efficiency (η Pump1 ) can be expressed as: η Pump1 =A / B.

[0198] In the above example, the pump selection efficiency of the candidate pump Pump1 can be calculated based on the operating parameters of the flow operating points at the pump demand flow rates Q1 (corresponding to one flow operating point) and Q2 (corresponding to three flow operating points).

[0199] Then, for the candidate water pump Pump1, when there are N water pump demand flows, and each water pump demand flow corresponds to M flow operating points, the water pump selection efficiency of water pump Pump1 can be expressed by formula 1:

[0200] (1);

[0201] in:

[0202]

[0203] The electronic device performs the same processing as the selected water pump Pump1 on each of the selected water pumps, and can obtain the water pump selection efficiency of each of the selected water pumps.

[0204] In a possible implementation, the preset water pump demand flow rate includes N water pump demand flow rates, and the working parameters include the water pump working head and the water pump working efficiency, where N is a positive integer;

[0205] Based on the preset pump demand flow rate and the pump working head and pump working efficiency of the flow working point of each candidate pump, the pump selection efficiency of each candidate pump is determined, including:

[0206] Based on the required flow rates of the N water pumps, a second preset operation is performed for each of the water pumps to be selected, so as to obtain a third type of indicator value corresponding to each of the water pumps to be selected;

[0207] The ratio between the third index value of each candidate water pump and the number of working points of the flow working point of each candidate water pump is determined as the water pump selection efficiency of each candidate water pump;

[0208] The second preset operation includes:

[0209] For each of the M flow rate operating points corresponding to the required flow rates of each water pump, the product of the corresponding water pump working head and the water pump working efficiency is determined as the fifth index value, thereby obtaining M fifth index values, where M is a positive integer;

[0210] The product of the required flow rate of each water pump and the sum of its corresponding M fifth index values ​​is determined as the fifth index value, thereby obtaining N sixth index values;

[0211] The sum of the N sixth index values ​​is determined as the third type index value.

[0212] The third type of indicator values ​​mentioned above can refer to the introduction of the first type of indicator values ​​in the above embodiment, and will not be repeated here.

[0213] The fifth index value can be found in the introduction of the first index value in the above embodiment, and will not be repeated here.

[0214] The sixth index value mentioned above can refer to the introduction of the second index value in the above embodiment, and will not be repeated here.

[0215] Take the above-mentioned candidate water pump Pump1 as an example, and the required flow rates of N water pumps correspond to M flow operating points. The water pump selection efficiency (η Pump1’ ) can be expressed by formula 2:

[0216] (2);

[0217] Similarly, the electronic device performs the same processing as the aforementioned process on each candidate water pump Pump1 to obtain the water pump selection efficiency of each candidate water pump.

[0218] In a possible implementation, determining a target water pump from a plurality of candidate water pumps according to the water pump selection efficiency of each candidate water pump includes:

[0219] Determine the pump selection efficiency with the largest value from the pump selection efficiencies of all the pumps to be selected;

[0220] The candidate water pump corresponding to the water pump selection efficiency with the largest value is determined as the target water pump.

[0221] In the embodiment of the present application, the candidate water pump corresponding to the water pump selection efficiency with the largest value is determined as the target water pump from the water pump selection efficiency of all the candidate water pumps, so that the target water pump can reduce the operating energy consumption of the fluid distribution system when operating in the fluid distribution system.

[0222] For example, the candidate water pumps include three different models of candidate water pumps Pump1, Pump2, and Pump3, and the pump selection efficiencies of the three candidate water pumps are η1, η2, and η3, respectively, and η1 < η2 < η3. Then, the electronic device can use the candidate water pump Pump3 corresponding to η3 as the target water pump.

[0223] In a possible implementation, after determining a target water pump from a plurality of candidate water pumps based on the water pump selection efficiency of each candidate water pump, the method further includes:

[0224] Determine a target flow rate operating point corresponding to a target demand flow rate from an operating characteristic curve of a target water pump;

[0225] Determine the target operating area corresponding to the target flow operating point in the operating characteristic curve of the target water pump;

[0226] According to the target demand flow and the target working area, a target control strategy is determined from multiple preset water pump control strategies.

[0227] The embodiment of the present application can determine the target water pump control strategy from multiple preset water pump control strategies based on the working characteristic curve of the target water pump. The target water pump control strategy can respond quickly during the actual operation stage of the water pump without the need for manual adjustment by the staff, thereby avoiding the inefficiency and high working energy consumption caused by the staff adjusting relevant parameters based on work experience to meet the flow requirements of the system.

[0228] by Figure 2 In the example of the chilled water distribution system in FIG, the above-mentioned related parameters may include at least one of the on / off number of the target water pump, the on / off number of the plate heat exchanger, and the operating frequency of the target water pump.

[0229] The above target demand flow can be understood as Figure 2 The most common working flow rate of the ice water distribution system in actual operation, or it can be understood as the working flow rate with the highest working frequency.

[0230] See Figure 9 , Figure 9 Another working characteristic curve involved in a water pump selection method provided in an embodiment of the present application is: Figure 9 The working characteristic curve is in the above Figure 3 Based on the above, the operating frequency curve of the water pump is added, and the operating frequencies include 25Hz, 30Hz, 35Hz, 40Hz, 45Hz and 50Hz.

[0231] The above preset pump control strategy includes Figure 9 The pump working flow, pump working efficiency, pump working frequency and pump working head corresponding to any point on the working characteristic curve.

[0232] like Figure 9 Given the target pump's operating characteristic curve, the target flow rate operating point corresponding to the target demand flow rate can be determined from the target pump's operating characteristic curve. The target operating range can then be determined based on the curve where the target flow rate operating point lies. Finally, based on the target demand flow rate and target operating range, a target control strategy can be determined from multiple preset pump control strategies.

[0233] For example, in Figure 9 It can be found that if the intersection point closest to the horizontal axis among the intersection points corresponding to the target flow rate of 800 cubic meters per hour is determined as the target flow working point P800 (the corresponding working head is about 7 meters and the working efficiency is about 77%), the working frequency is about 9 Hz.

[0234] The curve corresponding to the target flow operating point P800 is the curve corresponding to the working condition of pump 3 (the number of pumps turned on is 3). In order to more clearly observe the working area of ​​the pump corresponding to the number of pumps turned on is 3, you can refer to Figure 6 .

[0235] The target control strategy corresponding to the target flow operating point P800 may include:

[0236] The working head of the water pump is 7 meters;

[0237] The operating frequency of the water pump is 29 Hz;

[0238] The pump operates at an efficiency of 77%.

[0239] In one possible implementation, the operating parameters include the operating head of the water pump;

[0240] Determine the target flow operating point corresponding to the target demand flow from the operating characteristic curve of the target water pump, including:

[0241] Determining at least one flow operating point corresponding to a target required flow from an operating characteristic curve of a target water pump;

[0242] When the water pump working head corresponding to each flow operating point is determined, the flow operating point corresponding to the water pump working head with the smallest value among multiple water pump working heads is taken as the target flow operating point.

[0243] In the embodiment of the present application, by determining the flow rate operating point corresponding to the minimum pump head as the target flow rate operating point, a pump with a small pump head requires less power and consumes less electricity. Thus, under the target control strategy determined by the target flow rate operating point with a small pump head, the target pump can reduce operating energy consumption while meeting actual water demand, significantly reducing system operating costs, especially in long-term use.

[0244] Still Figure 9 or Figure 6 For example, the target demand flow is 800 cubic meters per hour, and there are 5 corresponding flow operating points. Among them, the flow operating point with the lowest pump working head has a pump working head of 7 meters. The electronic device can use the flow operating point corresponding to the pump working head of 7 meters as the above target flow operating point.

[0245] In one possible implementation, the target operating area includes a plurality of water pump operating frequency curves corresponding to preset water pump control strategies;

[0246] Based on the target demand flow and target operating area, the target control strategy is determined from multiple preset pump control strategies, including:

[0247] Determine a target water pump operating frequency curve having an intersection with a straight line corresponding to a target demand flow rate from water pump operating frequency curves corresponding to a plurality of preset water pump control strategies;

[0248] The preset water pump control strategy corresponding to the target water pump operation frequency curve is determined as the target control strategy.

[0249] In the embodiment of the present application, a corresponding target control strategy can be determined by determining a target water pump operating frequency curve.

[0250] The target water pump operating frequency curve is a water pump operating frequency curve at which the target flow rate operating point is located among a plurality of water pump operating frequency curves.

[0251] by Figure 9 For example, the target demand flow rate is 800 cubic meters per hour, and the corresponding water pump operating frequency is 29 Hz. The target water pump operating frequency curve is the curve corresponding to 29 Hz. The target control strategy in this embodiment includes the target water pump operating frequency.

[0252] In some embodiments, based on Figure 2 The calculation formula for the working head H in the working characteristic curve of the above-mentioned candidate water pump Pump1 is Formula 3:

[0253] (3);

[0254] (4);

[0255] in,

[0256] Pout represents the pressure test value at the water outlet;

[0257] Pin represents the pressure test value at the water inlet;

[0258] Indicates local resistance loss (which can refer to the head loss of the fluid passing through pipes, valves, etc., and in this embodiment includes the flexible connection of the outlet and the sudden contraction and expansion adapter);

[0259] represents the resistance loss along the way (which can refer to the head lost when the fluid flows through the straight pipe section. In this embodiment, it is the sum of the hydraulic losses caused by all straight pipe sections between the inlet and outlet pressure gauges of the water pump);

[0260] Indicates the resistance loss through the software head;

[0261] Indicates the resistance loss of the adapter when it is suddenly retracted;

[0262] Indicates the resistance loss of the adapter due to sudden expansion.

[0263] In the above-mentioned ice water distribution system, the local resistance of the pipeline is obtained according to Formula 5, and the resistance along the pipeline can be calculated using the pipeline friction coefficient, which is obtained according to Formula 6:

[0264] (5);

[0265] (6);

[0266] in,

[0267] ζ represents the local resistance coefficient, which is usually determined by experiment;

[0268] ρ represents the density of the fluid in the pipe, usually the density of water, in kg / m 3 ;

[0269] f represents the pipeline friction coefficient;

[0270] D represents the pipe diameter, in m;

[0271] L represents the length of the pipeline in meters.

[0272] The above pipeline friction system f can be calculated by formula 7:

[0273] (7);

[0274] (8);

[0275] in,

[0276] e represents roughness, unit is m;

[0277] Re represents the Reynolds number;

[0278] D represents the characteristic length (i.e. the diameter of the pipe);

[0279] μ represents the dynamic viscosity of the fluid (water), with the unit being Pa·s.

[0280] Corresponding to the above method embodiment, the present application embodiment also provides a water pump selection system, see Figure 10 , Figure 10This is a functional module diagram of a water pump selection system provided in an embodiment of the present application, wherein the water pump selection system 1000 includes:

[0281] The first acquisition module 1010 is used to acquire a plurality of water pumps to be selected and an operating characteristic curve of each water pump to be selected;

[0282] The first determining module 1020 is configured to determine the flow rate operating point of each candidate water pump corresponding to the preset pump demand flow rate from the operating characteristic curve of each candidate water pump;

[0283] The second acquisition module 1030 is used to obtain the operating parameters of the flow rate operating point of each to-be-selected water pump;

[0284] The second determining module 1040 is used to determine the water pump selection efficiency of each candidate water pump according to the preset water pump demand flow rate and the working parameters of the flow operating point of each candidate water pump;

[0285] The third determining module 1050 is configured to determine a target water pump from a plurality of candidate water pumps according to the water pump selection efficiency of each candidate water pump.

[0286] The water pump selection system provided in the embodiment of the present application can achieve the following Figure 1 The various processes implemented in the method embodiments can achieve similar or identical technical effects, and to avoid repetition, they will not be described here.

[0287] In a possible implementation, the preset water pump demand flow rate includes N water pump demand flow rates, and the working parameters include the water pump working head and the water pump working efficiency, where N is a positive integer;

[0288] The second determining module 1040 is further configured to:

[0289] Based on the required flow rates of the N water pumps, a first preset operation is performed for each of the candidate water pumps to obtain an indicator set corresponding to each of the candidate water pumps, the indicator set including a first type of indicator value and a second type of indicator value;

[0290] The ratio between the first index value of each candidate water pump and the second index value of each candidate water pump is determined as the water pump selection efficiency of each candidate water pump;

[0291] The first preset operation includes:

[0292] For each of the M flow rate operating points corresponding to the required flow rates of each water pump, the product of the corresponding water pump working head and the water pump working efficiency is determined as a first index value, thereby obtaining M first index values, where M is a positive integer;

[0293] The product of the required flow rate of each water pump and the sum of its corresponding M first index values ​​is determined as the second index value, thereby obtaining N second index values;

[0294] Determine the sum of the N second index values ​​as the first category index value;

[0295] For each of the M flow rate operating points corresponding to the required flow rate of each water pump, the sum of the corresponding M water pump working heads is determined as the third index value to obtain N third index values;

[0296] The product of the required flow rate of each water pump and its corresponding third index value is determined as the fourth index value to obtain N fourth index values;

[0297] The sum of the N fourth index values ​​is determined as the second-category index value.

[0298] In a possible implementation, the preset water pump demand flow rate includes N water pump demand flow rates, and the working parameters include the water pump working head and the water pump working efficiency, where N is a positive integer;

[0299] The second determining module 1040 is further configured to:

[0300] Based on the required flow rates of the N water pumps, a second preset operation is performed for each of the water pumps to be selected, so as to obtain a third type of indicator value corresponding to each of the water pumps to be selected;

[0301] The ratio between the third index value of each candidate water pump and the number of working points of the flow working point of each candidate water pump is determined as the water pump selection efficiency of each candidate water pump;

[0302] The second preset operation includes:

[0303] For each of the M flow rate operating points corresponding to the required flow rates of each water pump, the product of the corresponding water pump working head and the water pump working efficiency is determined as the fifth index value, thereby obtaining M fifth index values, where M is a positive integer;

[0304] The product of the required flow rate of each water pump and the sum of its corresponding M fifth index values ​​is determined as the fifth index value, thereby obtaining N sixth index values;

[0305] The sum of the N sixth index values ​​is determined as the third type index value.

[0306] In a possible implementation, the third determining module 1050 is further configured to:

[0307] Determine the pump selection efficiency with the largest value from the pump selection efficiencies of all the pumps to be selected;

[0308] The candidate water pump corresponding to the water pump selection efficiency with the largest value is determined as the target water pump.

[0309] In a possible implementation, the water pump selection system 1000 further includes a fourth determination module, which is configured to:

[0310] Determine a target flow rate operating point corresponding to a target demand flow rate from an operating characteristic curve of a target water pump;

[0311] Determine the target operating area corresponding to the target flow operating point in the operating characteristic curve of the target water pump;

[0312] According to the target demand flow and the target working area, a target control strategy is determined from multiple preset water pump control strategies.

[0313] In a possible implementation, the operating parameter includes the operating head of the water pump, and the fourth determination module is further specifically configured to:

[0314] Determining at least one flow operating point corresponding to a target required flow from an operating characteristic curve of a target water pump;

[0315] When the water pump working head corresponding to each flow operating point is determined, the flow operating point corresponding to the water pump working head with the smallest value among multiple water pump working heads is taken as the target flow operating point.

[0316] In one possible implementation, the target operating area includes a plurality of water pump operating frequency curves corresponding to preset water pump control strategies;

[0317] The fourth determination module is further specifically configured to:

[0318] Determine a target water pump operating frequency curve having an intersection with a straight line corresponding to a target demand flow rate from water pump operating frequency curves corresponding to a plurality of preset water pump control strategies;

[0319] The preset water pump control strategy corresponding to the target water pump operation frequency curve is determined as the target control strategy.

[0320] The present application also provides an electronic device. Figure 11 , Figure 11 This is a diagram of the internal structure of an electronic device provided in an embodiment of the present application. The electronic device includes a processor, a memory, and a network interface connected via a system bus. The memory includes a non-volatile storage medium and an internal memory. The non-volatile storage medium of the electronic device stores an operating system and may also store a computer program. When the computer program is executed by the processor, the processor may implement the water pump selection method applied to the electronic device in the above embodiment. The internal memory may also store a computer program. When the computer program is executed by the processor, the processor may execute the water pump selection method. Those skilled in the art will understand that Figure 11The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the electronic device to which the solution of the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0321] The embodiment of the present application further discloses a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the water pump selection method in the method embodiment is implemented.

[0322] An embodiment of the present application provides a computer program product, which is stored in a storage medium. The program product is executed by at least one processor to implement the various processes of the embodiment of the water pump selection method as described above, and can achieve similar or identical technical effects. To avoid repetition, it will not be described here.

[0323] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, which can be stored in a non-volatile computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0324] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A method for selecting a water pump, characterized in that: The method comprises: Obtaining a plurality of water pumps to be selected and an operating characteristic curve of each of the water pumps to be selected; Determining the flow rate operating point of each of the water pumps to be selected, which corresponds to the preset water pump demand flow rate, from the operating characteristic curve of each of the water pumps to be selected; Obtaining the operating parameters of the flow rate operating point of each of the water pumps to be selected; Determining the water pump selection efficiency of each of the water pumps to be selected based on the preset water pump demand flow rate and the operating parameters of the flow operating point of each of the water pumps to be selected; Determining a target water pump from the plurality of water pumps to be selected based on the water pump selection efficiency of each of the water pumps to be selected; The preset water pump demand flow rate includes N water pump demand flow rates, the operating parameters include water pump working head and water pump working efficiency, and N is a positive integer; determining the water pump selection efficiency of each of the to-be-selected water pumps based on the preset water pump demand flow rate and the water pump working head and water pump working efficiency at the flow operating point of each of the to-be-selected water pumps includes: Based on the required flow rates of the N water pumps, performing a first preset operation for each of the to-be-selected water pumps to obtain an indicator set corresponding to each of the to-be-selected water pumps, the indicator set including a first type of indicator value and a second type of indicator value; Determine the ratio between the first index value of each of the to-be-selected water pumps and the second index value of each of the to-be-selected water pumps as the water pump selection efficiency of each of the to-be-selected water pumps; The first preset operation includes: For each of the M flow rate operating points corresponding to the required flow rates of the water pumps, the product of the corresponding water pump working head and the water pump working efficiency is determined as a first index value, to obtain M first index values, where M is a positive integer; Determine the product of the required flow rate of each water pump and the sum of its corresponding M first index values ​​as the second index value, to obtain N second index values; Determine the sum of the N second index values ​​as the first category index value; For each of the M flow rate operating points corresponding to the required flow rates of the water pumps, the sum of the corresponding M water pump working heads is determined as a third index value to obtain N third index values; Determine the product of the required flow rate of each water pump and its corresponding third index value as the fourth index value, so as to obtain N fourth index values; Determine the sum of the N fourth index values ​​as the second-category index value; Alternatively, the preset water pump required flow rate includes N water pump required flow rates, the operating parameters include water pump working head and water pump working efficiency, and N is a positive integer; determining the water pump selection efficiency of each of the to-be-selected water pumps based on the preset water pump required flow rate and the water pump working head and water pump working efficiency at the flow operating point of each of the to-be-selected water pumps includes: Based on the required flow rates of the N water pumps, performing a second preset operation for each of the to-be-selected water pumps to obtain a third-category indicator value corresponding to each of the to-be-selected water pumps; Determine the ratio between the third index value of each of the to-be-selected water pumps and the number of working points of the flow working point of each of the to-be-selected water pumps as the water pump selection efficiency of each of the to-be-selected water pumps; The second preset operation includes: For each of the M flow rate operating points corresponding to the required flow rates of the water pumps, the product of the corresponding water pump working head and the water pump working efficiency is determined as a fifth index value, to obtain M fifth index values, where M is a positive integer; The product of the required flow rate of each water pump and the sum of its corresponding M fifth index values ​​is determined as the fifth index value, thereby obtaining N sixth index values; The sum of the N sixth index values ​​is determined as the third type index value.

2. The method according to claim 1, wherein The step of determining a target water pump from the plurality of water pumps to be selected based on the water pump selection efficiency of each water pump to be selected comprises: Determine the water pump selection efficiency with the largest value from the water pump selection efficiencies of all the water pumps to be selected; The candidate water pump corresponding to the water pump selection efficiency with the largest value is determined as the target water pump.

3. The method according to claim 1, characterized in that After determining the target water pump from the plurality of candidate water pumps based on the water pump selection efficiency of each candidate water pump, the method further includes: Determining a target flow rate operating point corresponding to a target demand flow rate from an operating characteristic curve of the target water pump; Determine a target operating area corresponding to the target flow operating point in the operating characteristic curve of the target water pump; According to the target demand flow and the target working area, a target control strategy is determined from a plurality of preset water pump control strategies.

4. The method according to claim 3, characterized in that The working parameters include the working head of the water pump; The step of determining a target flow rate operating point corresponding to a target demand flow rate from an operating characteristic curve of the target water pump includes: Determining at least one flow rate operating point corresponding to the target required flow rate from the operating characteristic curve of the target water pump; When the water pump working head corresponding to each flow operating point is determined, the flow operating point corresponding to the water pump working head with the smallest value among the multiple water pump working heads is used as the target flow operating point.

5. The method according to claim 3, characterized in that The target working area includes a plurality of water pump operation frequency curves corresponding to the preset water pump control strategies; Determining a target control strategy from a plurality of preset water pump control strategies according to the target demand flow and the target working area includes: Determining a target water pump operating frequency curve having an intersection with a straight line corresponding to the target demand flow rate from a plurality of water pump operating frequency curves corresponding to the preset water pump control strategies; The preset water pump control strategy corresponding to the target water pump operation frequency curve is determined as the target control strategy.

6. A water pump selection system, characterized in that: The system comprises: A first acquisition module is used to acquire a plurality of water pumps to be selected and an operating characteristic curve of each of the water pumps to be selected; A first determining module is configured to determine, from the operating characteristic curves of the water pumps to be selected, the flow rate operating point of each of the water pumps to be selected corresponding to the preset water pump demand flow rate; A second acquisition module is used to obtain the operating parameters of the flow rate operating point of each of the to-be-selected water pumps; A second determining module is used to determine the water pump selection efficiency of each of the to-be-selected water pumps according to the preset water pump demand flow rate and the working parameters of the flow rate working point of each of the to-be-selected water pumps; A third determining module is configured to determine a target water pump from the plurality of water pumps to be selected based on the water pump selection efficiency of each of the water pumps to be selected; The preset water pump required flow rate includes N water pump required flow rates, the working parameters include the water pump working head and the water pump working efficiency, and N is a positive integer; the second determination module is further used to: Based on the required flow rates of the N water pumps, performing a first preset operation for each of the to-be-selected water pumps to obtain an indicator set corresponding to each of the to-be-selected water pumps, the indicator set including a first type of indicator value and a second type of indicator value; Determine the ratio between the first index value of each of the to-be-selected water pumps and the second index value of each of the to-be-selected water pumps as the water pump selection efficiency of each of the to-be-selected water pumps; The first preset operation includes: For each of the M flow rate operating points corresponding to the required flow rates of the water pumps, the product of the corresponding water pump working head and the water pump working efficiency is determined as a first index value, to obtain M first index values, where M is a positive integer; Determine the product of the required flow rate of each water pump and the sum of its corresponding M first index values ​​as the second index value, to obtain N second index values; Determine the sum of the N second index values ​​as the first category index value; For each of the M flow rate operating points corresponding to the required flow rates of the water pumps, the sum of the corresponding M water pump working heads is determined as a third index value to obtain N third index values; Determine the product of the required flow rate of each water pump and its corresponding third index value as the fourth index value, so as to obtain N fourth index values; Determine the sum of the N fourth index values ​​as the second-category index value; Alternatively, the preset water pump required flow rate includes N water pump required flow rates, the operating parameters include the water pump working head and the water pump working efficiency, and N is a positive integer; the second determining module is further specifically configured to: Based on the required flow rates of the N water pumps, performing a second preset operation for each of the to-be-selected water pumps to obtain a third-category indicator value corresponding to each of the to-be-selected water pumps; Determine the ratio between the third index value of each of the to-be-selected water pumps and the number of working points of the flow working point of each of the to-be-selected water pumps as the water pump selection efficiency of each of the to-be-selected water pumps; The second preset operation includes: For each of the M flow rate operating points corresponding to the required flow rates of the water pumps, the product of the corresponding water pump working head and the water pump working efficiency is determined as a fifth index value, to obtain M fifth index values, where M is a positive integer; The product of the required flow rate of each water pump and the sum of its corresponding M fifth index values ​​is determined as the fifth index value, thereby obtaining N sixth index values; The sum of the N sixth index values ​​is determined as the third type index value.

7. An electronic device, characterized in that: The electronic device includes a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the water pump selection method according to any one of claims 1 to 5 is implemented.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by one or more processors, the computer program implements the water pump selection method according to any one of claims 1 to 5.

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