Water pump type selection method, system and equipment and storage medium

Abstract

The embodiment of the invention discloses a water pump type selection method, system and device and a storage medium, and relates to the technical field of water pumps, and the method comprises the steps that a plurality of to-be-selected water pumps and working characteristic curves of the to-be-selected water pumps are obtained; determining a flow working point of each to-be-selected water pump corresponding to the preset water pump demand flow from the working characteristic curve of each to-be-selected water pump; working parameters of flow working points of all the to-be-selected water pumps are obtained; according to the preset water pump demand flow and the working parameters of the flow working points of the to-be-selected water pumps, the water pump type selection efficiency of the to-be-selected water pumps is determined; and determining a target water pump from the plurality of to-be-selected water pumps according to the water pump type selection efficiency of each to-be-selected water pump. The target water pump can be determined from the to-be-selected water pumps, and model selection of the water pumps is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of water pumps, and in particular, to a method, system, device, and storage medium for selecting a water pump. Background Art

[0002] The selection of a water pump can be to select a suitable type and specification of the water pump according to specific usage scenarios, requirements, and operating conditions to meet the requirements of actual applications.

[0003] In the design of a fluid distribution system with multiple pumps for multiple heat exchangers, traditional water pump selection methods usually take the full-load operating point as the core, and select the water pump by calculating the pipeline distribution resistance and the required flow rate at full load. However, considering that most of the time in the distribution of large-scale cooling and heating systems operates at non-full-load operating points, the water pumps selected by traditional water pump selection methods have high energy consumption during long-term distribution operation in the fluid distribution system.

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

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

[0006] To achieve the above object, the technical solution of the present application is realized as follows: In a first aspect, an embodiment of the present application provides a method for selecting a water pump, the method includes: Obtain a plurality of water pumps to be selected and the working characteristic curves of each water pump to be selected; Determine the flow working points of each water pump to be selected corresponding to the preset water pump demand flow rate from the working characteristic curves of each water pump to be selected; Obtain the working parameters of the flow working points of each water pump to be selected; Determine the water pump selection efficiency of each water pump to be selected according to the preset water pump demand flow rate and the working parameters of the flow working points of each water pump to be selected; Determine the target water pump from a plurality of water pumps to be selected according to the water pump selection efficiency of each water pump to be selected.

[0007] In a possible implementation manner, the preset water pump demand flow rate includes N water pump demand flow rates, the working parameters include the water pump working head and the water pump working efficiency, and N is a positive integer; Determine the pump selection efficiency of each candidate pump according to the preset pump demand flow rate, the pump working head, and the pump working efficiency at the flow working points of each candidate pump, including: Based on N pump demand flow rates, perform a first preset operation for each candidate pump to obtain an index set corresponding to each candidate pump, where the index set includes a first type of index value and a second type of index value; Determine the ratio between the first type of index value and the second type of index value of each candidate pump as the pump selection efficiency of each candidate pump; The first preset operation includes: For each flow working point among the M flow working points corresponding to each pump demand flow rate, determine the product of the corresponding pump working head and the pump working efficiency as the first index value, and obtain M first index values, where M is a positive integer; Determine the product of each pump demand flow rate and the sum of its corresponding M first index values as the second index value, and obtain N second index values; Determine the sum of the N second index values as the first type of index value; For each of the M flow working points corresponding to each pump demand flow rate, determine the sum of the corresponding M pump working heads as the third index value to obtain N third index values; Determine the product of each pump demand flow rate and its corresponding third index value as the fourth index value to obtain N fourth index values; Determine the sum of the N fourth index values as the second type of index value.

[0008] In a possible implementation manner, the preset pump demand flow rate includes N pump demand flow rates, and the working parameters include the pump working head and the pump working efficiency, where N is a positive integer; Determine the pump selection efficiency of each candidate pump according to the preset pump demand flow rate, the pump working head, and the pump working efficiency at the flow working points of each candidate pump, including: Based on N pump demand flow rates, perform a second preset operation for each candidate pump to obtain a third type of index value corresponding to each candidate pump; Determine the ratio between the third type of index value of each candidate pump and the number of working points at the flow working points of each candidate pump as the pump selection efficiency of each candidate pump; The second preset operation includes: For each flow working point among the M flow working points corresponding to each pump demand flow rate, determine the product of the corresponding pump working head and the pump working efficiency as the fifth index value, and 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, and N sixth index values are obtained; The sum of the N sixth index values is determined as the third type of index value.

[0009] In a possible implementation manner, according to the pump selection efficiency of each candidate water pump, determining a target water pump from several candidate water pumps includes: Determining the pump selection efficiency with the largest value from the pump selection efficiencies of all candidate water pumps; The candidate water pump corresponding to the pump selection efficiency with the largest value is determined as the target water pump.

[0010] In a possible implementation manner, after determining a target water pump from several candidate water pumps according to the pump selection efficiency of each candidate water pump, the method further includes: Determining a target flow working point corresponding to the target required flow rate from the working characteristic curve of the target water pump; Determining a target working area corresponding to the target flow working point on the working characteristic curve of the target water pump; According to the target required flow rate and the target working area, determining a target control strategy from multiple preset water pump control strategies.

[0011] In a possible implementation manner, the working parameters include the working head of the water pump; Determining a target flow working point corresponding to the target required flow rate from the working characteristic curve of the target water pump includes: Determining at least one flow working point corresponding to the target required flow rate from the working characteristic curve of the target water pump; In the case of determining the working head of the water pump corresponding to each flow working point, the flow working point corresponding to the smallest working head value among the multiple working heads of the water pump is used as the target flow working point.

[0012] In a possible implementation manner, the target working area includes the pump operation frequency curves corresponding to multiple preset water pump control strategies; According to the target required flow rate and the target working area, determining a target control strategy from multiple preset water pump control strategies includes: Determining a target pump operation frequency curve whose straight line corresponding to the target required flow rate has an intersection point from the pump operation frequency curves corresponding to multiple preset water pump control strategies; The preset water pump control strategy corresponding to the target pump operation frequency curve is determined as the target control strategy.

[0013] In a second aspect, an embodiment of the present application provides a water pump selection system, and the system includes: The first acquisition module is configured to acquire a plurality of candidate water pumps and the working characteristic curves of each candidate water pump; The first determination module is configured to determine, from the working characteristic curves of each candidate water pump, the flow working points of each candidate water pump corresponding to the preset water pump required flow rate; The second acquisition module is configured to acquire the working parameters of the flow working points of each candidate water pump; The second determination module is configured to determine the water pump selection efficiency of each candidate water pump according to the preset water pump required flow rate and the working parameters of the flow working points of each candidate water pump; The third determination module is configured to determine a target water pump from the plurality of candidate water pumps according to the water pump selection efficiency of each candidate water pump.

[0014] In a third aspect, an embodiment of the present application provides an electronic device. The electronic device includes a memory and a processor. A computer program is stored on the memory. When the computer program is executed by the processor, the water pump selection method provided in the first aspect is implemented.

[0015] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium. A computer program is stored on the computer-readable storage medium. When the computer program is executed by one or more processors, the water pump selection method provided in the first aspect is implemented.

[0016] An embodiment of the present application provides a water pump selection method. By acquiring a plurality of candidate water pumps and the working characteristic curves of each candidate water pump, and determining, from the working characteristic curves of each candidate water pump, the flow working points of each candidate water pump corresponding to the preset water pump required flow rate. Then, the working parameters of the flow working points of each candidate water pump are acquired, and the water pump selection efficiency of each candidate water pump is determined according to the preset water pump required flow rate and the working parameters of the flow working points of each candidate water pump. Finally, a suitable target water pump is determined from the plurality of candidate water pumps according to the water pump selection efficiency of each candidate water pump, so as to accurately select a water pump, and then operate 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 operation. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. It should be understood that the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a flowchart of a water pump selection method provided by an embodiment of the present application.

[0019] Figure 2 Schematic diagram of an ice water distribution system related to a method for selecting a water pump provided by an embodiment of the present application.

[0020] Figure 3 Operating characteristic curve related to a method for selecting a water pump provided by an embodiment of the present application.

[0021] Figure 4 Another operating characteristic curve related to a method for selecting a water pump provided by an embodiment of the present application.

[0022] Figure 5 Another operating characteristic curve related to a method for selecting a water pump provided by an embodiment of the present application.

[0023] Figure 6 Another operating characteristic curve related to a method for selecting a water pump provided by an embodiment of the present application.

[0024] Figure 7 Another operating characteristic curve related to a method for selecting a water pump provided by an embodiment of the present application.

[0025] Figure 8 Another operating characteristic curve related to a method for selecting a water pump provided by an embodiment of the present application.

[0026] Figure 9 Another operating characteristic curve related to a method for selecting a water pump provided by an embodiment of the present application.

[0027] Figure 10 Schematic diagram of the functional modules of a water pump selection system provided by an embodiment of the present application.

[0028] Figure 11 Internal structure diagram of an electronic device provided by an embodiment of the present application.

[0029] Explanation of reference numerals: 1, water supply main pipe of the ice water distribution system; 2, water pump branch switch valve; 3, pressure gauge; 4, Y-type filter; 5, flexible joint; 6, sudden contraction pipe; 7, sudden expansion pipe; 8, check valve; 9, flowmeter; 10, plate heat exchanger; 11, water return main pipe of the ice water distribution system; 12, ice pond. 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 implementation manners

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some, but not all, of the embodiments of this application. The components of the embodiments of this application usually described and illustrated in the accompanying drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0032] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0033] In various embodiments of this application, the expression "or" or "at least one of A or / and B" includes any combination or all combinations of the listed words. 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.

[0034] In the description of this application, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is habitually placed during use, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0035] In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0036] It should be noted that, without conflict, the features in the embodiments of this application can be combined with each other.

[0037] Moreover, in the embodiments of this application, the term "connection" can refer to "electrical connection" or "direct connection". "Electrical connection" can mean that two components are directly electrically connected, or that two components are electrically connected via one or more other components such as normally open tubes.

[0038] To solve the technical problems in the background art, the embodiments of the present application provide a method for selecting a water pump, a system for selecting a water pump, an electronic device, and a computer-readable storage medium. First, the method for selecting a water pump provided by the embodiments of the present application will be introduced below.

[0039] Please refer to Figure 1 , Figure 1 which is a flowchart of a method for selecting a water pump provided by the embodiments of the present application. This method for selecting a water pump can be applied to the system for selecting a water pump or the electronic device in the following embodiments. The electronic device includes personal computers, servers, mobile devices, cloud computing platforms, supercomputers, etc. The method for selecting a water pump will be introduced below from the perspective of being applied to an electronic device. The method for selecting a water pump specifically includes the following steps 110 to 150.

[0040] Step 110: Obtain a plurality of water pumps to be selected and the working characteristic curves of each water pump to be selected.

[0041] Step 120: Determine the flow working points of each water pump to be selected corresponding to the preset water pump required flow rate from the working characteristic curves of each water pump to be selected.

[0042] Step 130: Obtain the working parameters of the flow working points of each water pump to be selected.

[0043] Step 140: Determine the water pump selection efficiency of each water pump to be selected according to the preset water pump required flow rate and the working parameters of the flow working points of each water pump to be selected.

[0044] Step 150: Determine the target water pump from the plurality of water pumps to be selected according to the water pump selection efficiency of each water pump to be selected.

[0045] The method for selecting a water pump provided by the embodiments of the present application obtains a plurality of water pumps to be selected and the working characteristic curves of each water pump to be selected, and determines the flow working points of each water pump to be selected corresponding to the preset water pump required flow rate from the working characteristic curves of each water pump to be selected. Then, the working parameters of the flow working points of each water pump to be selected are obtained, and the water pump selection efficiency of each water pump to be selected is determined according to the preset water pump required flow rate and the working parameters of the flow working points of each water pump to be selected. Finally, according to the water pump selection efficiency of each water pump to be selected, a suitable target water pump is determined from the plurality of water pumps to be selected to achieve accurate selection of the water pump, so that the target water pump can be operated, which can reduce the energy consumption of the fluid distribution system during long-term operation and improve the economy and reliability of the operation of the fluid distribution system.

[0046] The following will elaborate on each step of the method as Figure 1 in detail.

[0047] In step 110, the electronic device can obtain several candidate water pumps and the working characteristic curves of each candidate water pump. Based on the working characteristic curves of the candidate water pumps, the electronic device can determine the water pump selection efficiency corresponding to the candidate water pumps in the subsequent implementation steps, and based on the water pump selection efficiency corresponding to the candidate water pumps, the electronic device can determine the target water pump in the subsequent implementation steps.

[0048] The above several candidate water pumps can be provided for the electronic device at different stages for the electronic device to select. The embodiments of the present application do not specifically limit the above different stages.

[0049] Exemplarily, several candidate water pumps can be the water pumps provided to meet the engineering design requirements during the water pump engineering design stage of a multi-heat exchanger to multi-pump group system in a district cooling system.

[0050] Or, several candidate water pumps can be the water pumps provided to meet the bidding and procurement requirements during the water pump bidding and procurement stage of a multi-heat exchanger to multi-pump group system.

[0051] Or, several candidate water pumps can be the water pumps provided to meet the actual operation requirements during the actual operation stage of a multi-heat exchanger to multi-pump group system.

[0052] The above several candidate water pumps are several water pumps of different types or the same type but different models. For example, several candidate water pumps include 3 water pumps of the same type but different models, and the models are model 1, model 2, and model 3 respectively.

[0053] To uniformly describe the applicable stage or applicable scenario after water pump selection, this embodiment and the following embodiments will introduce the water pump selection method from the actual operation stage of the water pump. However, it should be noted that whether it is in the above water pump engineering design stage, the above water pump bidding and procurement stage, or the above water pump actual operation stage, the operating energy consumption of the water pump in a multi-heat exchanger to multi-pump group system or the fluid transportation and distribution system abbreviated above is one of the important evaluation indicators.

[0054] The above working characteristic curve is a characteristic curve obtained by performing an operation test on the candidate water pump and can actually reflect the working operation state of the candidate water pump.

[0055] The working characteristic curves of candidate water pumps of different types or different signals are generally different.

[0056] Exemplarily, the working characteristic curve can be used to reflect the correlation between the working flow rate of the water pump and the working head of the water pump.

[0057] Exemplarily, the working characteristic curve can be used to reflect the correlation among the working flow rate of the water pump, the working head of the water pump, and the working efficiency of the water pump.

[0058] 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.

[0059] Generally, different types of water pumps or water pumps of the same type but different models have different designed flow rates (the designed flow rate here can be understood as the theoretical working flow rate under the design parameters corresponding to the design). For example, the working principles and structural characteristics of centrifugal water pumps, axial-flow water pumps, and mixed-flow water pumps are different, and the corresponding designed flow rates are generally also different. Specifically, the designed flow rate of axial-flow water pumps is relatively large, the designed flow rate of centrifugal water pumps is relatively small, and the designed flow rate of mixed-flow water pumps is between that of axial-flow water pumps and centrifugal water pumps.

[0060] In addition, for the impeller, which is a key component of the water pump, its size and rotational speed have a direct impact on the working flow rate of the water pump. For example, if the impeller diameter is larger and the rotational speed is higher, then the working flow rate of the water pump is also larger. The pressure difference between the inlet and outlet of the water pump and liquids of different properties inside the water pump can both affect the working flow rate of the water pump, which will not be elaborated one by one in this embodiment.

[0061] In some embodiments, the electronic device can, when detecting a water pump selection request, obtain the above-mentioned several candidate water pumps and the working characteristic curves of each candidate water pump based on the water pump selection request.

[0062] Specifically, the electronic device can identify the water pump selection request, extract key features from the water pump selection request to determine the water pump model in the water pump selection request. The embodiments of the present application do not specifically limit the manner of extracting the above key features.

[0063] In some embodiments, the working characteristic curves of water pumps of different types and different models are pre-stored in the electronic device. After the electronic device determines the water pump model in the water pump selection request, it can quickly determine the corresponding working characteristic curve for the water pump model.

[0064] In some embodiments, when the working characteristic curves of the candidate water pumps are not stored in the electronic device, the electronic device can feedback an acquisition instruction to the requesting user of the water pump selection request, and the acquisition instruction can be used to remind the requesting user to feedback the working characteristic curves of each model of candidate water pumps in the water pump selection request.

[0065] In some embodiments, when the working characteristic curves of the candidate water pumps are not stored in the electronic device, the electronic device can perform simulation tests on different models of candidate water pumps based on some existing fluid simulation software in related technologies to obtain the working characteristic curves of different models of candidate water pumps.

[0066] In some embodiments, the electronic device may first perform a security check on the water pump selection request. When the check result corresponding to the security check indicates that the check passes, the electronic device may perform the above-mentioned steps of identification and key feature extraction on the water pump selection request.

[0067] In some embodiments, the above-mentioned security check may include at least one of identity check and permission check. Specifically, when the electronic device performs an identity check on the water pump selection request, it can determine whether the identity of the requesting user corresponding to the water pump selection request is compliant, etc. When the electronic device performs a permission check on the water pump selection request, it can determine whether the requesting user has the corresponding request permission.

[0068] In step 120, after the electronic device determines the working characteristic curves of each candidate water pump, it can determine the flow working point of the water pump corresponding to the preset water pump demand flow rate from each working characteristic curve. Based on the flow working point, the electronic device can complete the calculation of the water pump selection efficiency of the subsequent candidate water pumps.

[0069] The above-mentioned preset water pump demand flow rate may be the flow rate with a high usage frequency in the above-mentioned multi-heat exchanger to multi-pump group system or the fluid distribution system abbreviated above, or can be understood as the most commonly used flow rate in the multi-heat exchanger to multi-pump group system or the fluid distribution system.

[0070] In some embodiments, the preset water pump demand flow rate includes one.

[0071] In some embodiments, the preset water pump demand flow rate includes multiple.

[0072] The above-mentioned flow working point is the intersection point between the working characteristic curve of the candidate water pump and the line segment corresponding to the preset water pump demand flow rate. The flow working point can be used to reflect the water pump working head or water pump working efficiency corresponding to the candidate water pump at the preset water pump demand flow rate.

[0073] In step 130, after the electronic device determines the flow working points of the candidate water pumps in the corresponding working characteristic curves based on the foregoing embodiments, it can determine the working parameters corresponding to each flow working point.

[0074] The above-mentioned working parameters are the parameters included in the working characteristic curve of the candidate water pump.

[0075] In some embodiments, the working parameters include at least one of water pump working flow rate, water pump working head, and water pump working efficiency.

[0076] To clearly introduce the flow working points of the candidate water pumps in step 120 above, and the working parameters of the flow working points in step 130, please refer to Figure 2 , Figure 2Schematic diagram of an ice water distribution system involved in a pump selection method provided by an embodiment of the present application. Among them, in Figure 2 In Figure 2 , the ice water distribution system includes the ice water distribution system water supply main pipe 1, the 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 flowmeter 9, the plate heat exchanger 10, the ice water distribution system return water main pipe 11, the ice pond 12, and the pump ( Figure 2 In Figure 2 , 1#, 2#, 3#, 4#, and 5# are all pumps). This ice water distribution system is mainly composed of the ice pond 12, 5 parallel pumps with the same model, and 5 parallel plate heat exchangers 10.

[0077] In the above ice water distribution system, the 5 parallel pumps have the same model and parameters, and the 5 parallel plate heat exchangers have the same model and parameters.

[0078] Based on the above ice water distribution system, use the above fluid simulation software to perform simulation tests on the pump to be selected Pump 1 Perform simulation tests on opening 1 pump to be selected Pump 1 and 1 plate heat exchanger respectively, and obtain the working characteristic curve S 1 of the pump to be selected Pump 1 , and this curve S 1 includes the working area of 1 pump to be selected Pump 1 , the working area of 2 pumps to be selected Pump 1 , the working area of 3 pumps to be selected Pump 1 , the working area of 4 pumps to be selected Pump 1 , and the working area of 5 pumps to be selected Pump 1 .

[0079] It should be noted that the working characteristic curves of each pump to be selected in the embodiments of the present application are all obtained through simulation tests based on the Figure 2 shown ice water distribution system.

[0080] Although the above ice water distribution system is shown for illustrative purposes as mainly composed of an ice pond, 5 parallel pumps, and 5 parallel plate heat exchangers, and in the connection relationship, the 5 parallel pumps and the 5 parallel plate heat exchangers are in series. However, more pumps and plate heat exchangers can be reduced or added according to actual needs, and they are all within the protection scope of the present application.

[0081] Please refer to Figure 3 , Figure 3It is the operating characteristic curve involved in a pump selection method provided by an embodiment of this application. In the operating characteristic curve, the operating head of the pump can be obtained through simulation calculations under different numbers of pumps (1 to 5 units), different numbers of plate heat exchangers (1 to 5 units), and different pump operating frequencies (25 Hz to 50 Hz).

[0082] Among them, for the pump to be selected, Pump 1 and the preset pump required flow rate includes the required flow rate Q 1 (1675 cubic meters per hour). The operating characteristic curve of the pump to be selected, Pump 1 is S 1 (the horizontal axis of S 1 represents the operating flow rate, and the vertical axis of S 1 represents the operating head). Example: The required flow rate Q 1 corresponds to the straight line L 1 in the operating characteristic curve S 1 . The intersection points between the straight line L 1 and the operating characteristic curve S 1 include P 1 . Then it can be shown that the pump to be selected, Pump 1 has only one flow operating point corresponding to the preset pump required flow rate Q 1 in the operating characteristic curve S 1 , that is, the intersection point P 1 .

[0083] In the case where the preset pump required flow rate in the above example includes Q 2 and Q 2 (1600 cubic meters per hour), the required flow rate Q 1 corresponds to the straight line L 2 in the operating characteristic curve S 1 . The intersection points between the straight line L 2 and the operating characteristic curve S 3 include P 4 , P 1 and P 1 . Then it can be shown that the pump to be selected, Pump 1 has 4 flow operating points corresponding to the required flow rate Q 2 and the required flow rate Q 1 in the operating characteristic curve S 2 , that is, the intersection points P 3 , P 4 .

[0084] In the operating characteristic curve S 1 of the pump to be selected, Pump1, taking the flow operating point P 1 as an example, P1 The corresponding operating parameters include at least one of an operating flow rate of 1,675 cubic meters per hour, an operating head of 22.5 meters, and an operating efficiency of 80%.

[0085] In step 140, when the electronic device determines the preset water pump required flow rate and the operating parameters of the flow rate operating points of each candidate water pump, further calculations can be performed to obtain the water pump selection efficiency of each candidate water pump.

[0086] Taking the above candidate water pump Pump 1 and the preset water pump required flow rate including the required flow rate Q 1 and Q 2 as an example, the electronic device can determine the water pump selection efficiency of the candidate water pump Pump 1 based on the 4 operating flow rates, 4 operating heads, and 4 operating efficiencies corresponding to P 2 , P 3 , P 4 , and P 1 .

[0087] If the preset water pump required flow rate only includes 1 required flow rate Q 2 , then the electronic device can determine the water pump selection efficiency of the candidate water pump Pump 2 based on the 3 operating flow rates, 3 operating heads, and 3 operating efficiencies corresponding to P 3 , P 4 , and P 1 .

[0088] If the preset water pump required flow rate includes more required flow rates and the flow rate operating points corresponding to the more required flow rates exceed 3, then it is only necessary to determine the water pump selection efficiency of the candidate water pump Pump 1 for the operating head and operating efficiency of each flow rate operating point. No further examples will be given in the embodiments of the present application.

[0089] In some embodiments, for the candidate water pump Pump 1 , the electronic device can perform numerical operations on the operating flow rate, operating head, and operating efficiency of each of the corresponding multiple flow rate operating points to obtain the water pump selection efficiency of the candidate water pump Pump 1 . Correspondingly, by performing the same processing on each candidate water pump, the water pump selection efficiency of each candidate water pump can be obtained.

[0090] It should be noted that during the process of performing the same processing on each candidate water pump, it is necessary to ensure that the preset water pump required flow rate is the same, that is, for the candidate water pump Pump 1 , from the operating characteristic curve S of the candidate water pump Pump 1 1 ​Determine the demand flow Q 1 , Q 2 , Q 3 The flow operating point under working conditions is determined, and the pump to be selected is determined based on the relevant parameters of the determined flow operating point. 1 Pump selection efficiency. Then, for the selected pump, 2 , also need to select the pump 2 Working characteristic curve S 2 Determine its demand flow Q 1 , Q 2 , Q 3 The flow operating point under working conditions is determined, and the pump to be selected is determined based on the relevant parameters of the determined flow operating point. 2 Pump selection efficiency.

[0091] The above working characteristic curve S 1 and S 2 May not be the same, but in S 1 Q 1 , Q 2 , Q 3 With S 2 Q 1 , Q 2 , Q 3 In this way, the accuracy and reliability of determining the water pump selection efficiency of several water pumps to be selected can be improved.

[0092] In step 150 , when the electronic device has determined the water pump selection efficiency of each to-be-selected water pump in the above embodiment, the target water pump may be selected based on several water pump selection efficiencies.

[0093] 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 above-mentioned target water pump.

[0094] For another example, when the cost of a water pump is taken into consideration, the electronic device may use a water pump selection efficiency that is numerically higher among several water pump selection efficiencies and has the lowest purchase cost as the target water pump.

[0095] See also 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, the following number of water pumps and plate heat exchangers are turned on, and the corresponding working characteristic curves are: 1 water pump and 1 plate heat exchanger; 1 water pump and 2 plate heat exchangers; 1 water pump and 3 plate heat exchangers.

[0096] Please refer to Figure 5 , Figure 5 which is another working characteristic curve involved in the water pump selection method provided in the embodiments of the present application. Figure 5 Based on Figure 2 the ice water distribution system in when the working frequencies of the water pump are 25Hz, 30Hz, 35Hz, 40Hz, 45Hz and 50Hz respectively, the working characteristic curves corresponding to the following numbers of water pumps and plate heat exchangers are turned on: 2 water pumps and 1 plate heat exchanger; 2 water pumps and 2 plate heat exchangers; 2 water pumps and 3 plate heat exchangers; 2 water pumps and 4 plate heat exchangers;

[0097] Please refer to Figure 6 , Figure 6 which is another working characteristic curve involved in the water pump selection method provided in the embodiments of the present application. Figure 6 Based on Figure 2 the ice water distribution system in when the working frequencies of the water pump are 25Hz, 30Hz, 35Hz, 40Hz, 45Hz and 50Hz respectively, the working characteristic curves corresponding to the following numbers of water pumps and plate heat exchangers are turned on: 3 water pumps and 1 plate heat exchanger; 3 water pumps and 2 plate heat exchangers; 3 water pumps and 3 plate heat exchangers; 3 water pumps and 4 plate heat exchangers;

[0098] Please refer to Figure 7 , Figure 7 which is another working characteristic curve involved in the water pump selection method provided in the embodiments of the present application. Figure 7 Based on Figure 2 the ice water distribution system in when the working frequencies of the water pump are 25Hz, 30Hz, 35Hz, 40Hz, 45Hz and 50Hz respectively, the working characteristic curves corresponding to the following numbers of water pumps and plate heat exchangers are turned on: 4 water pumps and 2 plate heat exchangers; 4 water pumps and 3 plate heat exchangers; 4 water pumps and 5 plate heat exchangers.

[0099] Please refer to Figure 8 , Figure 8 which is another working characteristic curve involved in the water pump selection method provided by the embodiment of the present application. Figure 8 Based on Figure 2 in the ice water distribution system, when the working frequencies of the water pumps are 25 Hz, 30 Hz, 35 Hz, 40 Hz, 45 Hz and 50 Hz respectively, the working characteristic curves corresponding to the following numbers of water pumps and plate heat exchangers are turned on: 5 water pumps and 2 plate heat exchangers; 5 water pumps and 3 plate heat exchangers; 5 water pumps and 4 plate heat exchangers; 5 water pumps and 5 plate heat exchangers.

[0100] The 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 areas.

[0101] In a possible implementation manner, the preset water pump required flow rate includes N water pump required flow rates, and the working parameters include the water pump working head and the water pump working efficiency, where N is a positive integer; According to the preset water pump required flow rate and the water pump working head and water pump working efficiency of the flow working points of each water pump to be selected, determining the water pump selection efficiency of each water pump to be selected includes: Based on the N water pump required flow rates, performing a first preset operation on each water pump to be selected to obtain an index set corresponding to each water pump to be selected, where the index set includes a first type of index value and a second type of index value; Determining the ratio between the first type of index value and the second type of index value of each water pump to be selected as the water pump selection efficiency of each water pump to be selected; The first preset operation includes: For each flow working point among the M flow working points corresponding to each water pump required flow rate, determining the product of the corresponding water pump working head and water pump working efficiency as the first index value, obtaining M first index values, where M is a positive integer; Determining the product of each water pump required flow rate and the sum of its corresponding M first index values as the second index value, obtaining N second index values; Determining the sum of the N second index values as the first type of index value; For the M flow working points corresponding to the required flow rates of each water pump, the sum of the working heads of the M water pumps corresponding to them one by one is determined as the third index value to obtain N third index values; The product of each water pump required flow rate and its corresponding third index value is determined as the fourth index value to obtain N fourth index values; The sum of the N fourth index values is determined as the second type of index value.

[0102] In the embodiment of the present application, by performing a weighted average process on the working efficiencies of each candidate water pump under the preset water pump required flow rate, the water pump selection efficiency of each candidate water pump is obtained, and then the water pump selection can be accurately and reliably realized, so that the selected target water pump operates in the fluid distribution system, and the operating energy consumption of the fluid distribution system can be reduced.

[0103] The above N water pump required flow rates can be expressed as Q 1 、Q 2 、…、Q n 。

[0104] The above first index value is the product of the working head of the water pump corresponding to the flow working point and the working efficiency of the water pump. There are M first index values corresponding to the M flow working points.

[0105] Taking the candidate water pump Pump 1 as an example, in the characteristic working curve of the candidate water pump Pump 1 , the flow working point corresponding to the water pump required flow rate Q 1 is P 1 (Q 1 , H Q1-1 , η Q1-1 ), the flow working point corresponding to the water pump required flow rate Q 2 is P 2 (Q 2 , H Q2-1 , η Q2-1 )、P 3 (Q 2 , H Q2-2 , η Q2-2 )and P 4 (Q 2 , H Q2-3 , η Q2-3 )。

[0106] For the water pump required flow rate Q 1 and the water pump required flow rate Q 2 , the first index values include: H Q1-1 *η Q1-1 、H Q2-1 *η Q2-1 、H Q2-2 *ηQ2-2 、 H Q2-3 * η Q2-3 。

[0107] In the example, there are a total of 4 first index values. If there are M flow operating points, then there are M corresponding first index values.

[0108] The above second index value is the product of the sum of the pump demand flow rate and the above M first index values. N pump demand flow rates correspond to N second index values.

[0109] Taking the above-mentioned pump Pump to be selected 1 as an example, the second index value includes: Q 1 * H Q1-1 * η Q1-1 、 Q 2 * (H Q2-1 * η Q2-1 + H Q2-2 * η Q2-2 + H Q2-3 * η Q2-3 )。

[0110] In the example, there are a total of 2 second index values. If there are N pump demand flow rates, then there are N corresponding second index values.

[0111] The above first type of index value is the sum of N second index values.

[0112] Taking the above-mentioned pump Pump to be selected 1 , and the pump demand flow rate Q 1 and the pump demand flow rate Q 2 as an example, the first type of index value (A) can be expressed as: A = Q 1 * H Q1-1 * η Q1-1 + Q 2 * (H Q2-1 * η Q2-1 + H Q2-2 * η Q2-2 + H Q2-3 * η Q2-3 )。

[0113] The above third index value is the sum of the pump operating heads corresponding to each flow operating point corresponding to the pump demand flow rate. N pump demand flow rates correspond to N third index values.

[0114] Taking the above-mentioned pump Pump to be selected 1 , and the pump demand flow rate Q 1 and the pump demand flow rate Q 2 as an example, the third index value includes: HQ1-1 , H Q2-1 + H Q2-2 + H Q2-3 .

[0115] The above fourth index value is the product of the pump demand flow rate and the above third index value. There are N fourth index values corresponding to N pump demand flow rates.

[0116] Still referring to the above example, the fourth index value includes: Q 1 * H Q1-1 , Q 2 * (H Q2-1 + H Q2-2 + H Q2-3 ).

[0117] The above second type of index value is the sum of the above N fourth index values.

[0118] Still referring to the above example, the second type of index value (B) can be expressed as: B = Q 1 * H Q1-1 + Q 2 * (H Q2-1 + H Q2-2 + H Q2-3 ).

[0119] The pump selection efficiency (η 1 ) of the above pump to be selected, Pump Pump1 can be expressed as: η Pump1 = A / B.

[0120] The above example is for the working parameters of the flow working points of the pump to be selected, Pump 1 at the pump demand flow rates Q 1 (corresponding to 1 flow working point) and Q 2 (corresponding to 3 flow working points). The pump selection efficiency of the pump to be selected, Pump 1 , can be calculated.

[0121] Then, for the pump to be selected, Pump 1 at N pump demand flow rates, and each pump demand flow rate corresponding to M flow working points respectively, the pump selection efficiency of the pump, Pump 1 , can be expressed by Formula 1: (1); Where:

[0122] The electronic device performs the same processing on each candidate water pump as that on candidate water pump Pump1, and thus the water pump selection efficiency of each candidate water pump can be obtained.

[0123] In a possible implementation manner, the preset water pump required flow rate includes N water pump required flow rates, and the operating parameters include the water pump operating head and the water pump operating efficiency, where N is a positive integer. Determining the water pump selection efficiency of each candidate water pump according to the preset water pump required flow rate, the water pump operating head, and the water pump operating efficiency at the flow working point of each candidate water pump includes: Based on the N water pump required flow rates, perform a second preset operation on each candidate water pump to obtain third - type index values corresponding to each candidate water pump one by one. Determine the ratio between the third - type index value of each candidate water pump and the number of working points at the flow working point of each candidate water pump as the water pump selection efficiency of each candidate water pump. The second preset operation includes: For each flow working point among the M flow working points corresponding to each water pump required flow rate respectively, determine the product of the corresponding water pump operating head and the water pump operating efficiency as the fifth index value, and obtain M fifth index values, where M is a positive integer. Determine the product of each water pump required flow rate and the sum of its corresponding M fifth index values as the fifth index value, and obtain N sixth index values. Determine the sum of the N sixth index values as the third - type index value.

[0124] For the above - mentioned third - type index value, refer to the introduction of the first - type index value in the above - mentioned embodiment, and details are not described herein again.

[0125] For the above - mentioned fifth index value, refer to the introduction of the first index value in the above - mentioned embodiment, and details are not described herein again.

[0126] For the above - mentioned sixth index value, refer to the introduction of the second index value in the above - mentioned embodiment, and details are not described herein again.

[0127] Taking the above - mentioned candidate water pump Pump 1 , and taking the example of M flow working points corresponding to N water pump required flow rates in total, the water pump selection efficiency (η 1 ) of candidate water pump Pump Pump1’ can be expressed by formula (2): (2); Similarly, the electronic device performs the same processing on each candidate water pump as that on the above - mentioned candidate water pump Pump1, and the water pump selection efficiency of each candidate water pump can be obtained.

[0128] In a possible implementation manner, determining a target water pump from several candidate water pumps according to the water pump selection efficiency of each candidate water pump includes: Determine the pump selection efficiency with the largest value from the pump selection efficiencies of all candidate pumps; Determine the candidate pump corresponding to the pump selection efficiency with the largest value as the target pump.

[0129] In the embodiment of the present application, from the pump selection efficiencies of all candidate pumps, the candidate pump corresponding to the pump selection efficiency with the largest value is determined as the target pump, so that the target pump can reduce the operating energy consumption of the fluid distribution system when operating in the fluid distribution system.

[0130] Exemplarily, several candidate pumps include 3 candidate pumps of different models, namely Pump 1 , Pump 2 , and Pump 3 . The pump selection efficiencies of the 3 candidate pumps are η 1 , η 2 , and η 3 , respectively, and η 1 < η 2 < η 3 . Then, the electronic device can use the candidate pump Pump 3 corresponding to η 3 as the above target pump.

[0131] In a possible implementation manner, after determining the target pump from several candidate pumps according to the pump selection efficiencies of each candidate pump, the method further includes: Determine the target flow operating point corresponding to the target demand flow from the operating characteristic curve of the target pump; Determine the target operating region corresponding to the target flow operating point on the operating characteristic curve of the target pump; Determine the target control strategy from multiple preset pump control strategies according to the target demand flow and the target operating region.

[0132] In the embodiment of the present application, the target pump control strategy can be determined from multiple preset pump control strategies based on the operating characteristic curve of the target pump. The target pump control strategy can respond quickly during the actual operation stage of the pump, without the need for manual adjustment by staff, and can avoid the inefficiencies and high operating energy consumption caused by staff adjusting relevant parameters according to work experience to meet the flow requirements of the system.

[0133] Taking the example of the ice water distribution system in Figure 2 as an example, the above relevant parameters may include at least one of the number of target pumps turned on / off, the number of plate heat exchangers turned on / off, and the operating frequency of the target pump.

[0134] The above target demand flow can be understood as for Figure 2The most common working flow rate of the ice water distribution system during actual operation, or it can be understood as the working flow rate with the highest working frequency.

[0135] Please refer to Figure 9 , Figure 9 which is another working characteristic curve involved in the pump selection method provided by the embodiment of the present application. Figure 9 The working characteristic curve in Figure 3 adds the working frequency curve of the pump on the basis of the above, and the working frequencies include 25Hz, 30Hz, 35Hz, 40Hz, 45Hz and 50Hz.

[0136] The above preset pump control strategy includes Figure 9 the pump working flow rate, pump working efficiency, pump working frequency and pump working head corresponding to any point on the working characteristic curve in

[0137] If Figure 9 is the working characteristic curve of the above target pump, then the target flow working point corresponding to the target demand flow rate can be determined from the working characteristic curve of the target pump. Then, according to the curve where the target flow working point is located, the target working area is determined. Finally, the target control strategy can be determined from multiple preset pump control strategies according to the target demand flow rate and the target working area.

[0138] Exemplarily, 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.

[0139] The curve corresponding to the target flow working point P800 is the curve corresponding to the working condition of pump 3 (the number of pumps turned on is 3). To more clearly observe the working area of the pump corresponding to the number of pumps turned on being 3, please refer to Figure 6 .

[0140] The target control strategy corresponding to the above target flow working point P800 may include: The pump working head is 7 meters; The pump working frequency is 29 Hz; The pump working efficiency is 77%.

[0141] In a possible implementation manner, the working parameters include the pump working head; Determining the target flow working point corresponding to the target demand flow rate from the working characteristic curve of the target pump includes: Determining at least one flow working point corresponding to the target demand flow rate from the working characteristic curve of the target pump; When determining the pump operating head corresponding to each flow operating point, the flow operating point corresponding to the minimum pump operating head among multiple pump operating heads is used as the target flow operating point.

[0142] In the embodiment of the present application, by determining the flow operating point corresponding to the minimum pump operating head as the target flow operating point, the pump with a smaller pump operating head requires less power and consumes less electrical energy during operation. In this way, under the target control strategy determined by the target flow operating point with a small pump operating head value, it is possible to reduce the working energy consumption of the target pump while meeting the actual water usage requirements, especially in the case of long-term use, which can significantly reduce the operating cost of the system.

[0143] Still taking Figure 9 or Figure 6 as an example, the target demand flow rate is 800 cubic meters per hour, and there are 5 corresponding flow operating points. Among them, the pump operating head of the flow operating point with the lowest pump operating head is 7 meters. The electronic device can use the flow operating point corresponding to the pump operating head of 7 meters as the above-mentioned target flow operating point.

[0144] In a possible implementation manner, the target working area includes pump operation frequency curves corresponding to multiple preset pump control strategies; Determining a target control strategy from multiple preset pump control strategies according to the target demand flow rate and the target working area includes: Determining a target pump operation frequency curve whose straight line corresponding to the target demand flow rate has an intersection point among the pump operation frequency curves corresponding to multiple preset pump control strategies; Determining the preset pump control strategy corresponding to the target pump operation frequency curve as the target control strategy.

[0145] In the embodiment of the present application, the corresponding target control strategy can be determined by determining the target pump operation frequency curve.

[0146] The above-mentioned target pump operation frequency curve is the pump operation frequency curve where the above-mentioned target flow operating point is located among several pump operation frequency curves.

[0147] Taking Figure 9 as an example, the pump operation frequency corresponding to the target demand flow rate of 800 cubic meters per hour is 29 Hz. The target pump operation frequency curve is the curve corresponding to 29 Hz. The target control strategy in this embodiment includes the operation frequency of the target pump.

[0148] In some embodiments, based on Figure 2 the ice water distribution system and the candidate pump Pump 1 in it, the above-mentioned candidate pump Pump 1The calculation formula for the working head H in the working characteristic curve is Formula 3: (3); (4); Among them, Pout represents the pressure test value at the water outlet; Pin represents the pressure test value at the water inlet; represents the local resistance loss (which can refer to the head loss of the fluid passing through parts such as pipe fittings and valves. In this embodiment, it includes the flexible connection at the outlet and the reducing and expanding adapters); represents the frictional resistance loss along the path (which can refer to the head loss of the fluid flowing through the straight pipe section. In this embodiment, it is the sum of the hydraulic losses caused by all the straight pipe sections between the pressure gauges at the inlet and outlet of the water pump); represents the resistance loss through the software head; represents the resistance loss of the reducing adapter; represents the resistance loss of the expanding adapter.

[0149] In the above ice water distribution system, the local resistance of the pipeline is obtained according to Formula 5, and the frictional resistance along the pipeline can be calculated using the pipeline friction coefficient, that is, obtained according to Formula 6: (5); (6); Among them, ζ represents the local resistance coefficient, generally determined by experiments; ρ represents the fluid density in the pipeline, generally the density of water, with the unit of kg / m 3 ; f represents the pipeline friction coefficient; D represents the pipe diameter, with the unit of m; L represents the pipeline length, with the unit of m.

[0150] The above pipeline friction coefficient f can be calculated by Formula 7: (7); (8); Among them, e represents the roughness, with the unit of m; Re represents the Reynolds number; D represents the characteristic length (i.e., the diameter of the pipeline); μ represents the dynamic viscosity of the fluid (water), with the unit of Pa·s.

[0151] Corresponding to the above method embodiments, an embodiment of the present application further provides a water pump selection system. Please refer to Figure 10 , Figure 10 which is a schematic diagram of the functional modules of a water pump selection system provided by an embodiment of the present application. Among them, the water pump selection system 1000 includes: A first acquisition module 1010, configured to acquire a plurality of candidate water pumps and the working characteristic curves of each candidate water pump; A first determination module 1020, configured to determine the flow working points of each candidate water pump corresponding to the preset water pump demand flow rate from the working characteristic curves of each candidate water pump; A second acquisition module 1030, configured to acquire the working parameters of the flow working points of each candidate water pump; A second determination module 1040, configured 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 working points of each candidate water pump; A third determination module 1050, 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.

[0152] The water pump selection system provided by the embodiment of the present application can implement each process implemented by the method embodiment in Figure 1 , and can achieve similar or the same technical effects. To avoid repetition, it will not be elaborated here.

[0153] In a possible implementation manner, 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; The second determination module 1040 is further configured to: Based on the N water pump demand flow rates, perform a first preset operation for each candidate water pump to obtain an index set corresponding to each candidate water pump, where the index set includes a first type of index value and a second type of index value; Determine the ratio between the first type of index value and the second type of index value of each candidate water pump as the water pump selection efficiency of each candidate water pump; The first preset operation includes: For each flow working point among the M flow working points corresponding to each water pump demand flow rate, determine the product of the corresponding water pump working head and the water pump working efficiency as a first index value, and obtain M first index values, where M is a positive integer; Determine the product of each water pump demand flow rate and the sum of its corresponding M first index values as a second index value, and obtain N second index values; Determine the sum of the N second index values as the first type of index value; For the M flow working points corresponding to the required flow rates of each water pump respectively, determine the sum of the working heads of the M water pumps corresponding to them one by one as the third index value, so as to obtain N third index values; Determine the product of each required water pump flow rate 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 type of index value.

[0154] In a possible implementation manner, the preset required water pump flow rates include N required water pump flow rates, and the working parameters include the working head of the water pump and the working efficiency of the water pump, where N is a positive integer; The second determination module 1040 is further configured to: Based on the N required water pump flow rates, perform a second preset operation on each candidate water pump to obtain the third type of index values corresponding to each candidate water pump one by one; Determine the ratio between the third type of index value of each candidate water pump and the number of working points of the flow working points of each candidate water pump as the water pump selection efficiency of each candidate water pump; The second preset operation includes: For each flow working point among the M flow working points corresponding to each required water pump flow rate respectively, determine the product of the corresponding working head of the water pump and the working efficiency of the water pump as the fifth index value, to obtain M fifth index values, where M is a positive integer; Determine the product of each required water pump flow rate and the sum of its corresponding M fifth index values as the fifth index value, to obtain N sixth index values; Determine the sum of the N sixth index values as the third type of index value.

[0155] In a possible implementation manner, the third determination module 1050 is further configured to: Determine the water pump selection efficiency with the largest value from the water pump selection efficiencies of all candidate water pumps; Determine the candidate water pump corresponding to the water pump selection efficiency with the largest value as the target water pump.

[0156] In a possible implementation manner, the water pump selection system 1000 further includes a fourth determination module, and this fourth determination module is used for: Determine the target flow working point corresponding to the target required flow rate from the working characteristic curve of the target water pump; Determine the target working area corresponding to the target flow working point in the working characteristic curve of the target water pump; According to the target required flow rate and the target working area, determine the target control strategy from multiple preset water pump control strategies.

[0157] In a possible implementation manner, the working parameters include the working head of the water pump, and the fourth determination module is further specifically configured to: Determine at least one flow operating point corresponding to the target required flow rate from the operating characteristic curve of the target water pump; When determining the working head of the water pump corresponding to each flow operating point, use the flow operating point corresponding to the minimum working head among the multiple working heads of the water pump as the target flow operating point.

[0158] In a possible implementation manner, the target working area includes the water pump operation frequency curves corresponding to multiple preset water pump control strategies; The fourth determination module is further specifically configured to: Determine the target water pump operation frequency curve where there is an intersection point between the straight lines corresponding to the target required flow rate from the water pump operation frequency curves corresponding to multiple preset water pump control strategies; Determine the preset water pump control strategy corresponding to the target water pump operation frequency curve as the target control strategy.

[0159] The embodiments of the present application also provide an electronic device. The present application also provides an electronic device. Please refer to Figure 11 , Figure 11 which is an internal structure diagram of an electronic device provided by an embodiment of the present application. Among them, the electronic device includes a processor, a memory, and a network interface connected through a system bus. Among them, the memory includes a non-volatile storage medium and an internal memory. The non-volatile storage medium of this electronic device stores an operating system and can also store a computer program. When the computer program is executed by the processor, the processor can implement the method for selecting a water pump applied to the electronic device in the above embodiments. The internal memory can also store a computer program. When the computer program is executed by the processor, the processor can execute the method for selecting a water pump. Those skilled in the art can understand that Figure 11 the structure shown in

[0160] The embodiments of the present application also disclose a computer-readable storage medium. A computer program is stored on the computer-readable storage medium. When the computer program is executed by the processor, the method for selecting a water pump in the method embodiment is implemented.

[0161] The embodiments of the present application provide a computer program product. The program product is stored in a storage medium. The program product is executed by at least one processor to implement each process of the above embodiments of the method for selecting a water pump and can achieve similar or the same technical effects. To avoid repetition, it will not be described in detail here.

[0162] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. This program 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 methods. Among them, any reference to a memory, storage, database, or other medium used in the embodiments provided in this application can include non-volatile and / or volatile memories. 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. By way of 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 (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and Rambus dynamic RAM (RDRAM), etc.

[0163] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, 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, it should be considered as the scope described in 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 a working characteristic curve of each of the water pumps to be selected; Determine the flow rate operating point of each of the water pumps to be selected corresponding to the preset water pump demand flow rate from the working characteristic curve of each of the water pumps to be selected; Obtaining the working parameters of the flow working 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 according to the preset water pump demand flow rate and the working parameters of the flow rate working point of each of the water pumps to be selected; According to the water pump selection efficiency of each of the water pumps to be selected, a target water pump is determined from the plurality of water pumps to be selected.

2. The method according to claim 1, characterized in that The preset water pump demand flow rate includes N water pump demand flow rates, the working parameters include the water pump working head and the water pump working efficiency, and N is a positive integer; The method of 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 water pump working head and water pump working efficiency at the flow working point of each of the water pumps to be selected includes: Based on the required flow rates of the N water pumps, a first preset operation is performed for each of the water pumps to be selected, so as to obtain an indicator set corresponding to each of the water pumps to be selected, wherein the indicator set includes a first indicator value and a second indicator value; Determine the ratio between the first index value of each of the water pumps to be selected and the second index value of each of the water pumps to be selected as the water pump selection efficiency of each of the water pumps to be selected; The first preset operation includes: For each flow rate operating point among 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 the first index value, to obtain M first index values, where M is a positive integer; The product of the required flow rate of each water pump and the sum of the M first index values ​​corresponding to it is determined as the second index value to obtain N second index values; Determine the sum of the N second index values ​​as the first type index value; For the M flow 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 the third index value to obtain N third index values; The product of the required flow rate of each water pump and the third index value corresponding thereto is determined as the fourth index value to obtain N fourth index values; The sum of the N fourth index values ​​is determined as the second-category index value.

3. The method according to claim 1, characterized in that The preset water pump demand flow rate includes N water pump demand flow rates, the working parameters include the water pump working head and the water pump working efficiency, and N is a positive integer; The method of 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 water pump working head and water pump working efficiency at the flow working point of each of the water pumps to be selected includes: 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 index value corresponding to each of the water pumps to be selected; The ratio between the third index value of each of the water pumps to be selected and the number of working points of the flow working point of each of the water pumps to be selected is determined as the water pump selection efficiency of each of the water pumps to be selected; The second preset operation includes: For each flow rate operating point among 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 the 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 the M fifth index values ​​corresponding thereto 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.

4. The method according to claim 1, characterized in that The step of determining a target water pump from the plurality of water pumps to be selected according to the water pump selection efficiency of each of the water pumps 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.

5. The method according to claim 1, characterized in that After determining the target water pump from the plurality of water pumps to be selected according to the water pump selection efficiency of each of the water pumps to be selected, 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 working area corresponding to the target flow rate working point in the working 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.

6. The method according to claim 5, 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 the operating characteristic curve of the target water pump comprises: 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 of the flow operating points 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.

7. The method according to claim 5, 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: Determine, from the water pump operation frequency curves corresponding to the plurality of preset water pump control strategies, a target water pump operation frequency curve having an intersection with the straight line corresponding to the target demand flow rate; The preset water pump control strategy corresponding to the target water pump operation frequency curve is determined as the target control strategy.

8. 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 determination module is used to determine the flow rate operating point of each of the water pumps to be selected corresponding to the preset water pump demand flow rate from the working characteristic curve of each of the water pumps to be selected; A second acquisition module is used to acquire the working parameters of the flow working point of each of the to-be-selected water pumps; A second determination module is used to determine the water pump selection efficiency of each of the water pumps to be selected according to the preset water pump demand flow and the working parameters of the flow working point of each of the water pumps to be selected; The third determination module is used to determine a target water pump from the plurality of water pumps to be selected according to the water pump selection efficiency of each of the water pumps to be selected.

9. 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 7 is implemented.

10. 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 7.

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