Method and system for determining optimization range and energy consumption curve of constant-rotating-speed pump unit

Abstract

The invention belongs to the technical field of pump units, and discloses a method and system for determining the optimization range and energy consumption curve of a constant-speed pump unit, and the method comprises the steps: enabling the system to provide a pressure requirement p; the corresponding flow Qmax is calculated according to the inlet flow-pressure curve and the lift-flow curve; all power from Qmin to Qmax is extracted, and the extracted power and the flow from Qmin to Qmax form an energy consumption curve of the pump; fitting the curve to obtain a flow-energy consumption relational expression; the system for determining the optimization range and the energy consumption curve of the constant-rotating-speed pump unit comprises an outlet pressure calculation module, a pressure-flow relational expression determination module, a flow calculation module, a power determination module and a curve fitting module. The energy consumption curve provided by the invention is a set of all operational working condition points capable of meeting the system pressure requirement.

Description

Technical Field

[0001] This invention belongs to the field of pump unit technology, and particularly relates to a method and system for determining the optimization range and energy consumption curve of a constant speed pump unit. Background Technology

[0002] Currently, to optimize the pump's operating point and achieve optimal energy consumption, it is essential to understand its energy consumption values ​​under different operating conditions (flow rates). Only then can subsequent optimization proceed. Although the pump's manufacturer's datasheet includes a flow-power curve, showing the relationship between flow rate and shaft power at a certain speed, this differs from the desired energy consumption curve in the following ways: The energy consumption curve here includes the concept of the pump unit, not just the pump itself. In other words, the energy consumption here includes a series of devices such as the motor, coupling, and frequency converter. This makes the power coordinates, although similar, different.

[0003] Existing technologies face the following main problems and shortcomings when optimizing pump operating points to achieve optimal energy consumption:

[0004] 1. The difference between the energy consumption curve and the flow-power curve:

[0005] The manufacturer's datasheet for existing pumps typically provides a flow-power curve, which reflects the relationship between flow rate and pump shaft power at a given speed. However, this differs significantly from the energy consumption curve required for actual operation. The energy consumption curve includes not only the pump's power consumption but also the energy consumption of the entire pump unit, including the energy consumption of the motor, coupling, frequency converter, and other related equipment. Therefore, simply relying on the flow-power curve cannot accurately reflect the actual energy consumption of the pump unit.

[0006] 2. Lack of comprehensive energy consumption assessment:

[0007] Current technologies lack a comprehensive method for assessing the overall energy consumption of pump units. Most manufacturer data focuses only on the energy consumption of the pump itself, neglecting the energy consumption of other auxiliary equipment. This makes it difficult to achieve comprehensive optimization of pump unit energy consumption in practical applications. This limitation is especially pronounced when operating under varying conditions.

[0008] 3. Incomplete data makes optimization difficult:

[0009] Because the data provided in the factory specifications does not include energy consumption information for equipment such as motors, couplings, and frequency converters, there is a lack of complete data support when performing energy consumption optimization. The absence of this crucial data makes it impossible to accurately assess the total energy consumption under each operating condition, thus making it difficult to find the optimal operating point and resulting in unsatisfactory energy consumption optimization results.

[0010] 4. Difficult to adapt to changing operating conditions:

[0011] Existing flow-power curves are typically measured under fixed operating conditions, while in real-world applications, the operating conditions of pump units change constantly. Current technologies struggle to quickly adjust and optimize pump unit energy consumption under varying conditions, making energy management and optimization under different operating conditions difficult and further limiting the system's energy-saving potential.

[0012] In summary, existing technologies for optimizing pump unit energy consumption mainly face problems and shortcomings such as incomplete energy consumption curves, lack of comprehensive evaluation, incomplete data, and difficulty in adapting to changing operating conditions. Summary of the Invention

[0013] To address the problems existing in the prior art, this invention provides a method and system for determining the optimization range and energy consumption curve of a constant speed pump unit, and particularly relates to a method, system, medium, equipment, and terminal for determining the optimization range and energy consumption curve of a non-variable frequency pump unit.

[0014] This invention is implemented as follows: a method for determining the optimization range and energy consumption curve of a constant-speed pump unit, comprising:

[0015] The system specifies a pressure requirement p; the corresponding flow rate Q is calculated based on the inlet flow-pressure curve and the head-flow curve. max Extract from Q min To Q max All power, and the extracted power is compared with Q. min To Q max The flow rate constitutes the pump's energy consumption curve; by fitting the curve, the flow rate-energy consumption relationship is obtained.

[0016] Furthermore, the method for determining the optimization range and energy consumption curve of the constant speed pump unit includes the following steps:

[0017] Step 1: The system proposes pressure requirements and calculates the outlet pressure at each flow point;

[0018] Step 2: Obtain the pressure-flow rate relationship based on each flow point and the corresponding outlet pressure;

[0019] Step 3: Substitute the system pressure requirement into the pressure-flow ratio to obtain Q. max ;

[0020] Step 4: Based on the running database, determine Q1-Q max Power P corresponding to each flow point i ;

[0021] Step 5: Determine the energy consumption curve based on the flow rate and corresponding power, and fit the flow rate-energy consumption relationship.

[0022] Furthermore, the system in step one requires a water supply flow rate and pressure of p.

[0023] Find the pressure h1 between points Q1 and Q2 in the characteristic database, and calculate the outlet pressure at each flow point using the following formula:

[0024] ;

[0025] in, This indicates the outlet pressure corresponding to the flow rate point, in MPa. Indicates the head corresponding to the flow rate point, in MPa; This indicates the inlet pressure corresponding to the flow rate point, in MPa.

[0026] Furthermore, in step two, the flow-pressure relationship is derived based on each flow point and the corresponding outlet pressure. And take the inverse function to form the pressure-flow relationship. .

[0027] Furthermore, in step three, the system pressure requirements are substituted... Find Q as Q max .

[0028] Furthermore, in step five, the flow rate and corresponding power are energy consumption curves, which are fitted to obtain the flow rate-energy consumption relationship. .

[0029] Another object of the present invention is to provide a system for determining the optimization range and energy consumption curve of a constant-speed pump unit using the aforementioned method, wherein the system comprises:

[0030] The outlet pressure calculation module is used by the system to propose pressure requirements and calculate the outlet pressure at each flow point;

[0031] The pressure-flow rate relationship determination module is used to obtain the pressure-flow rate relationship based on each flow point and the corresponding outlet pressure.

[0032] The flow calculation module is used to calculate Q by substituting the system pressure requirement into the pressure-flow relationship. max ;

[0033] The power determination module is used to determine Q1-Q based on the operating database. max Power P corresponding to each flow point i ;

[0034] The curve fitting module is used to determine the energy consumption curve based on the flow rate and corresponding power, and to fit the flow rate-energy consumption relationship.

[0035] Another object of the present invention is to provide a computer device comprising a memory and a processor, the memory storing a computer program, which, when executed by the processor, causes the processor to perform the following steps:

[0036] The system specifies a pressure requirement p; the corresponding flow rate Q is calculated based on the inlet flow-pressure curve and the head-flow curve. max Extract from Q min To Q max All power, and the extracted power is compared with Q. min To Q max The flow rate constitutes the pump's energy consumption curve; by fitting the curve, the flow rate-energy consumption relationship is obtained.

[0037] Another object of the present invention is to provide a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform the following steps:

[0038] The system specifies a pressure requirement p; the corresponding flow rate Q is calculated based on the inlet flow-pressure curve and the head-flow curve. max Extract from Q min To Q max All power, and the extracted power is compared with Q. min To Q max The flow rate constitutes the pump's energy consumption curve; by fitting the curve, the flow rate-energy consumption relationship is obtained.

[0039] Another objective of this invention is to provide an information data processing terminal, which is used to implement the optimization range and energy consumption curve determination system of the constant speed pump unit.

[0040] Based on the above technical solutions and the technical problems solved, please analyze the advantages and positive effects of the technical solution to be protected by this invention from the following aspects:

[0041] First, the energy consumption curve of this invention is a set of all operating conditions that can meet the system pressure requirements.

[0042] First, this invention addresses the problem of low operating efficiency of constant-speed pump units in existing industrial applications. In traditional industrial applications, due to a lack of precise optimization methods and energy consumption analysis, pump units often cannot operate at their most efficient state. This leads to energy waste and increased operating costs. This invention proposes an optimization range and energy consumption curve determination method, which can accurately find the high-efficiency operating range of the pump unit, thereby significantly improving operating efficiency.

[0043] Secondly, this invention solves the problem of high energy consumption in pump units in industrial applications. In the past, due to a lack of scientific energy consumption assessment methods, enterprises often could not accurately understand the energy consumption of pump units and found it difficult to take effective energy-saving measures. This invention, by constructing energy consumption curves, enables enterprises to clearly understand the energy consumption of pump units at different flow rates, providing strong data support for formulating energy-saving strategies.

[0044] Furthermore, this invention also solves the problem of improper pump unit selection in industrial applications. Traditional selection methods are often based on experience or rough estimations, resulting in pump units failing to achieve optimal performance in actual operation. This invention, through scientific calculation and analysis, provides an accurate basis for pump unit selection, ensuring that the selected pump unit can achieve optimal performance in actual operation.

[0045] Finally, through the application of this invention, industrial enterprises have achieved significant technological progress in the operation and management of pump units. Enterprises can more accurately control the operating parameters of pump units, achieving energy conservation and emission reduction goals. At the same time, this invention also improves the operational efficiency and management level of enterprises, laying a solid foundation for their sustainable development.

[0046] Third, this invention solves the problem of high energy consumption in existing constant-speed pump units during operation. Traditional constant-speed pumps typically cannot flexibly adjust operating parameters according to system requirements, resulting in significant unnecessary energy waste while meeting pressure requirements. By optimizing the relationship between flow rate and pressure, this invention provides a solution that can dynamically adapt to system needs, effectively reducing energy consumption.

[0047] First, this invention accurately calculates the outlet pressure at each flow point based on the pressure requirements proposed by the system, thus establishing a pressure-flow relationship. Traditional methods often lack precision in calculating outlet pressure, leading to significant errors in flow rate selection. This invention, however, employs a refined calculation method to ensure that the pressure at each flow point precisely matches the system requirements, thereby optimizing flow rate allocation.

[0048] Secondly, when determining the optimized flow range, this invention leverages data from a running database to quickly determine the power corresponding to each flow point. This method avoids the inefficient process of relying on experience and repeated experiments to determine power, thus improving the accuracy and efficiency of the calculation. By fitting the flow and power data, an accurate flow-energy consumption relationship is obtained, making energy consumption prediction more scientific and reliable.

[0049] Finally, the energy consumption curve fitting method provided by this invention makes the relationship between flow rate and energy consumption more intuitive and clear, facilitating energy management in practical applications. Compared with traditional methods, this invention demonstrates significant technological progress in optimizing flow rate and reducing energy consumption, providing an effective solution for energy saving in industrial and civil pump units. This technological advancement not only reduces operating costs but also contributes to green environmental protection and sustainable development. Attached Figure Description

[0050] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] Figure 1 This is a flowchart of the method for determining the optimization range and energy consumption curve of a constant speed pump unit provided in an embodiment of the present invention;

[0052] Figure 2 This is a schematic diagram of the method for determining the optimization range and energy consumption curve of a constant speed pump unit provided in an embodiment of the present invention;

[0053] Figure 3 This is a block diagram of the system structure for determining the optimization range and energy consumption curve of a constant speed pump unit provided in an embodiment of the present invention;

[0054] Figure 4 The embodiments of this invention provide that, within the operational range, the output of the pump can be adjusted via valves to ensure that the actual pump output meets the requirements.

[0055] Figure 5 This is a curve showing the comparative power provided in an embodiment of the present invention;

[0056] Figure 6 This is a schematic diagram of the operating principle provided in the embodiment of the present invention;

[0057] In the diagram: 1. Outlet pressure calculation module; 2. Pressure-flow relationship determination module; 3. Flow calculation module; 4. Power determination module; 5. Curve fitting module. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0059] To address the problems existing in the prior art, the present invention provides a method and system for determining the optimization range and energy consumption curve of a constant speed pump unit. The present invention will be described in detail below with reference to the accompanying drawings.

[0060] like Figure 1 As shown, the method for determining the optimization range and energy consumption curve of a constant-speed pump unit provided in this embodiment of the invention includes the following steps:

[0061] S101, the system proposes pressure requirements and calculates the outlet pressure at each flow point;

[0062] S102, the pressure-flow relationship is obtained based on each flow point and the corresponding outlet pressure;

[0063] S103, Substitute the system pressure requirements into the pressure-flow relationship to obtain Q. max ;

[0064] S104, Based on the running database, determine Q1-Q max Power P corresponding to each flow point i ;

[0065] S105. Determine the energy consumption curve based on the flow rate and corresponding power, and fit the flow rate-energy consumption relationship.

[0066] The working principle of the method for determining the optimization range and energy consumption curve of the constant speed pump unit provided in this embodiment of the invention can be summarized in detail as follows:

[0067] Step S101: The system proposes pressure requirements and calculates the outlet pressure at each flow point.

[0068] First, based on the actual needs of the industrial application system, specific pressure requirements should be proposed, which are the basic parameters to ensure the normal operation of the system.

[0069] Next, for different flow points, the outlet pressure value corresponding to each flow point is determined by measurement or calculation. This step is to establish the relationship between flow rate and outlet pressure.

[0070] Step S102: Obtain the pressure-flow ratio based on each flow point and the corresponding outlet pressure.

[0071] After collecting sufficient data points, analyzing this data allows us to derive a mathematical expression describing the relationship between outlet pressure and flow rate. This expression forms the basis for subsequent optimization and energy consumption analysis.

[0072] Step S103: Substitute the system pressure requirement into the pressure-flow rate formula to obtain Qmax.

[0073] Using the pressure-flow rate relationship obtained in step S102, and combining it with the system's pressure requirements, the maximum flow rate Qmax that satisfies the pressure requirements can be calculated. This value represents the maximum flow rate that the pump unit can handle while meeting the system pressure requirements.

[0074] Step S104: Determine Q1-Qmax based on the running database. Power Pi corresponding to each flow point

[0075] By accessing the pump unit's operating database, data from Q1 to Qmax can be obtained. Within the flow range, the power value Pi corresponding to each flow point. These data reflect the actual energy consumption of the pump unit at different flow rates.

[0076] Step S105: Determine the energy consumption curve based on the flow rate and corresponding power, and fit the flow rate-energy consumption relationship.

[0077] Using the flow rate and power data collected in step S104, the pump's energy consumption curve can be plotted. This curve visually illustrates the energy consumption of the pump unit at different flow rates.

[0078] Furthermore, by fitting these data using mathematical methods, a mathematical expression describing the relationship between flow rate and energy consumption can be obtained. This expression is of great significance for predicting the energy consumption of pump units, formulating energy-saving strategies, and optimizing operating parameters.

[0079] In summary, the working principle of this invention is to determine the optimal operating range and energy consumption characteristics of a constant-speed pump unit by establishing and analyzing pressure-flow rate, flow rate-power ratio, and flow rate-energy consumption ratio. This method not only improves the operating efficiency of the pump unit but also provides strong technical support for energy conservation, emission reduction, and cost control in industrial enterprises.

[0080] The principle diagram of the method for determining the optimization range and energy consumption curve of the constant speed pump unit provided in this embodiment of the invention is shown below. Figure 2 As shown.

[0081] like Figure 3 As shown, the optimization range and energy consumption curve determination system for the constant speed pump unit provided in this embodiment of the invention includes:

[0082] The outlet pressure calculation module 1 is used by the system to propose pressure requirements and calculate the outlet pressure at each flow point;

[0083] Pressure-flow relationship determination module 2 is used to obtain the pressure-flow relationship based on each flow point and the corresponding outlet pressure;

[0084] Flow calculation module 3 is used to calculate Q by substituting the system pressure requirement into the pressure-flow relationship. max ;

[0085] Power determination module 4 is used to determine Q1-Q based on the operating database. max Power P corresponding to each flow point i ;

[0086] The curve fitting module 5 is used to determine the energy consumption curve based on the flow rate and corresponding power, and to fit the flow rate-energy consumption relationship.

[0087] The technical solution of the present invention will be further described below with reference to specific embodiments.

[0088] The flow-power curve is the curve from 0 flow rate to the manufacturer's specified maximum flow rate, while the energy consumption curve has the maximum flow rate point Q specified through field testing. max and minimum flow point Q min .

[0089] The flow-power curve is the relationship between flow rate and shaft power within the operating range of the pump, provided by the manufacturer. The energy consumption curve refers to the flow range within which the pump can operate while meeting the system's specified head, and the corresponding energy consumption of the pump unit within this flow range.

[0090] In fact, it's at the point of maximum flow Q. max Based on this, further revisions were made to form Q. max This invention considers Q at this time to be... min To Q max The flow rate and pump unit power constitute the energy consumption curve. This invention interprets this curve as the set of all operating conditions that can meet the system pressure requirements.

[0091] The method for obtaining the energy consumption curve of a non-inverter unit provided in this embodiment of the invention includes the following steps:

[0092] (1) The system proposes pressure requirements: Assume that the system has clear requirements p for the flow rate and pressure of the water supply.

[0093] (2) According to the characteristic database, find the pressure h1 between points Q1 and Q2, and then use the formula... Calculate the outlet pressure at each flow point;

[0094] In the formula, This indicates the outlet pressure (MPa) corresponding to the flow rate point. Indicates the head (MPa) corresponding to the flow rate point; This indicates the inlet pressure (MPa) corresponding to the flow rate point.

[0095] (3) Based on each flow point and the corresponding outlet pressure, derive the flow-pressure relationship. And take its inverse function to form the pressure-flow relationship. .

[0096] (4) Substitute according to system pressure requirements Find Q as Q max .

[0097] (5) Based on the running database, find Q1-Q max The power P corresponding to each flow point in the middle i .

[0098] This flow rate and its corresponding power constitute the energy consumption curve, and fitting it yields the flow rate-energy consumption relationship. .

[0099] like Figure 4 As shown, within the operating range, the output of the actual pump can be adjusted by the valve to meet the requirements.

[0100] like Figures 5-6 As shown, after the pressure is reduced by the outlet valve, the corresponding demand pressure can be achieved regardless of the outlet pressure.

[0101] Based on the study of comparative power, Q is present across the entire curve. max This point represents the most energy-efficient point while meeting the required pressure. The energy consumption at this point can be understood as Q... max This point requires energy consumption.

[0102] The following are four examples of industrial applications illustrating the application of the optimization range and energy consumption curve determination method for constant speed pump units.

[0103] Example 1: Water Supply System

[0104] In a water supply system, a constant-speed pump unit is responsible for drawing water from the water source and delivering it to the user. To optimize the operating efficiency and energy consumption of the pump unit, the aforementioned optimization range and energy consumption curve determination method can be used.

[0105] 1. The system specifies a water supply pressure requirement p, which is the minimum pressure required to ensure normal water use at the user end.

[0106] 2. Based on the inlet flow-pressure curve and head-flow curve, and considering the system's pressure requirements, calculate the maximum flow rate Qmax that meets the pressure requirements. This flow rate is the upper limit at which the pump unit can operate efficiently.

[0107] 3. Extract the minimum flow rate (Qmin) to the maximum flow rate (Qmax) from the running database. The power values ​​corresponding to all flow points within the range. This data will be used to construct the pump's energy consumption curve.

[0108] 4. Using the extracted power data and corresponding flow rate data, plot the pump's energy consumption curve. By fitting the curve, the mathematical relationship between flow rate and energy consumption can be obtained.

[0109] 5. Based on this relationship, energy consumption under different flow rates can be predicted, thereby guiding the optimized operation of pump units. For example, during peak water usage periods, energy consumption can be reduced by adjusting the operating status of the pump units to operate within their high-efficiency range.

[0110] Example 2: Chemical Plant Circulation System

[0111] In chemical plants, circulation systems typically require pump units to circulate fluids such as coolants and reactants. To reduce energy consumption and improve production efficiency, the aforementioned optimization range and energy consumption curve determination method can be used to optimize the pump units.

[0112] 1. Based on the needs of the chemical production process, the system proposes a pressure requirement p for the circulating fluid.

[0113] 2. By analyzing the inlet flow-pressure curve and the head-flow curve, the maximum flow rate Qmax that meets the pressure requirement is calculated. This flow rate represents the upper limit at which pump units in a chemical plant's circulating system can operate efficiently.

[0114] 3. Extract data from the chemical plant's operational database, ranging from Qmin to Qmax. Power data corresponding to all flow points within the range. These data reflect the actual energy consumption of the pump unit at different flow rates.

[0115] 4. Use this data to construct the pump's energy consumption curve, and derive the mathematical relationship between flow rate and energy consumption through fitting. This relationship can help engineers predict and adjust the pump unit's operating status to achieve energy-saving goals.

[0116] 5. Based on energy consumption curves and formulas, chemical plants can adjust the operating parameters of pump units, such as speed and flow rate, at different production stages to ensure that the pump units always operate within their high-efficiency range. This not only reduces energy costs but also improves production efficiency and extends equipment lifespan.

[0117] Example 3: Oilfield Water Injection System

[0118] During oilfield development, water needs to be injected into oil wells through a water injection system to increase reservoir pressure and improve oil production efficiency. Constant-speed pump units play a crucial role in this system.

[0119] 1) Determine the water injection pressure: The oilfield engineer first proposes the pressure requirement p of the water injection system based on the characteristics of the oil well and the production needs.

[0120] 2) Calculate the maximum flow rate: Using the inlet flow-pressure curve and the head-flow curve, the engineer calculates the maximum flow rate Qmax under the condition of meeting the injection pressure requirements. This flow rate value will serve as a reference upper limit for the operation of the pump unit.

[0121] 3) Extracting power data: From the historical operating data of the water injection system, engineers extract data from the minimum flow rate Qmin to the maximum flow rate Qmax. Within the range, the power data corresponding to each flow point.

[0122] 4) Constructing an energy consumption curve: Using the extracted power and flow data, an energy consumption curve for the pump is constructed. This curve visually displays the energy consumption of the pump unit at different flow rates.

[0123] 5) Optimized operation: Based on the energy consumption curve, oilfield managers can adjust the operating status of the pump unit to make it work in the high-efficiency energy consumption range, thereby reducing energy consumption and improving water injection efficiency.

[0124] Example 4: Electric Cooling Water Circulation System

[0125] In the power industry, cooling water circulation systems are crucial for heat dissipation of power generation equipment. Constant-speed pump units are responsible for circulating cooling water to ensure the normal operation of the power generation equipment.

[0126] 1) Determine the cooling water pressure: Based on the heat dissipation requirements of the power generation equipment, the power system engineer proposes the pressure requirement p of the cooling water circulation system.

[0127] 2) Calculate the efficient operating range: Using the inlet flow-pressure curve and head-flow curve, calculate the efficient operating flow range under the cooling water pressure requirements, especially the maximum flow rate Qmax. .

[0128] 3) Analyze historical data: Extract data from the historical operating data of the power cooling water circulation system, ranging from the minimum flow rate Qmin to the maximum flow rate Qmax. Power data corresponding to each flow point.

[0129] 4) Plot the energy consumption curve: Based on the extracted data, plot the energy consumption curve of the pump unit, and fit the relationship between flow rate and energy consumption using mathematical methods.

[0130] 5) Optimize energy consumption: Power system operators can adjust the operating parameters of pump units, such as flow rate and running time, based on energy consumption curves and formulas, in order to reduce energy consumption while meeting cooling requirements.

[0131] These two examples demonstrate the application of the optimization range and energy consumption curve determination method for constant speed pump units in different industrial fields. Through this method, enterprises can more accurately control the operation of pump units and achieve the goals of energy conservation, emission reduction and efficiency improvement.

[0132] It should be noted that embodiments of the present invention can be implemented in hardware, software, or a combination of both. The hardware portion can be implemented using dedicated logic; the software portion can be stored in memory and executed by a suitable instruction execution system, such as a microprocessor or dedicated-design hardware. Those skilled in the art will understand that the above-described devices and methods can be implemented using computer-executable instructions and / or included in processor control code, for example, such code provided on a carrier medium such as a disk, CD, or DVD-ROM, a programmable memory such as read-only memory (firmware), or a data carrier such as an optical or electronic signal carrier. The devices and modules of the present invention can be implemented by hardware circuitry such as very large-scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, or programmable hardware devices such as field-programmable gate arrays, programmable logic devices, etc., or by software executed by various types of processors, or by a combination of the above-described hardware circuitry and software, such as firmware.

[0133] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in the present invention, and within the spirit and principles of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for determining the optimization range and energy consumption curve of a constant-speed pump unit, characterized in that, include: The system specifies a pressure requirement p; The corresponding flow rate Q is calculated based on the inlet flow rate-pressure curve and the head-flow rate curve. max Extract from Q min To Q max All power, and the extracted power is compared with Q. min To Q max The flow rate constitutes the pump's energy consumption curve; by fitting the curve, the flow rate-energy consumption relationship is obtained.

2. The method for determining the optimization range and energy consumption curve of a constant-speed pump unit as described in claim 1, characterized in that, The method for determining the optimization range and energy consumption curve of the constant speed pump unit includes the following steps: Step 1: The system proposes pressure requirements and calculates the outlet pressure at each flow point; Step 2: Obtain the pressure-flow rate relationship based on each flow point and the corresponding outlet pressure; Step 3: Substitute the system pressure requirement into the pressure-flow ratio to obtain Q. max ; Step 4: Based on the running database, determine Q1-Q max Power P corresponding to each flow point i ; Step 5: Determine the energy consumption curve based on the flow rate and corresponding power, and fit the flow rate-energy consumption relationship.

3. The method for determining the optimization range and energy consumption curve of a constant-speed pump unit as described in claim 2, characterized in that, The system in step one requires a water supply flow rate and pressure of p; Find the pressure h1 between points Q1 and Q2 in the characteristic database, and calculate the outlet pressure at each flow point using the following formula: ； in, This indicates the outlet pressure corresponding to the flow rate point, in MPa. Indicates the head corresponding to the flow rate point, in MPa; This indicates the inlet pressure corresponding to the flow rate point, in MPa.

4. The method for determining the optimization range and energy consumption curve of a constant-speed pump unit as described in claim 2, characterized in that, In step two, the flow-pressure relationship is derived based on each flow point and the corresponding outlet pressure. And take the inverse function to form the pressure-flow relationship. .

5. The method for determining the optimization range and energy consumption curve of a constant-speed pump unit as described in claim 2, characterized in that, In step three, the system pressure requirements are substituted... Find Q as Q max .

6. The method for determining the optimization range and energy consumption curve of a constant-speed pump unit as described in claim 2, characterized in that, In step five, the flow rate and corresponding power are energy consumption curves, which are fitted to obtain the flow rate-energy consumption relationship. .

7. A system for determining the optimization range and energy consumption curve of a constant-speed pump unit using the method for determining the optimization range and energy consumption curve as described in any one of claims 1 to 6, characterized in that, The optimization range and energy consumption curve determination system for the constant speed pump unit includes: The outlet pressure calculation module is used by the system to propose pressure requirements and calculate the outlet pressure at each flow point; The pressure-flow rate relationship determination module is used to obtain the pressure-flow rate relationship based on each flow point and the corresponding outlet pressure. The flow calculation module is used to calculate Q by substituting the system pressure requirement into the pressure-flow relationship. max ; The power determination module is used to determine Q1-Q based on the operating database. max Power P corresponding to each flow point i ; The curve fitting module is used to determine the energy consumption curve based on the flow rate and corresponding power, and to fit the flow rate-energy consumption relationship.

8. A computer device, characterized in that, The computer device includes a memory and a processor. The memory stores a computer program, which, when executed by the processor, causes the processor to perform the following steps: The system specifies a pressure requirement p; the corresponding flow rate Q is calculated based on the inlet flow-pressure curve and the head-flow curve. max Extract from Q min To Q max All power, and the extracted power is compared with Q. min To Q max The flow rate constitutes the pump's energy consumption curve; by fitting the curve, the flow rate-energy consumption relationship is obtained.

9. A computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform the following steps: The system specifies a pressure requirement p; the corresponding flow rate Q is calculated based on the inlet flow-pressure curve and the head-flow curve. max Extract from Q min To Q max All power, and the extracted power is compared with Q. min To Q max The flow rate constitutes the pump's energy consumption curve; by fitting the curve, the flow rate-energy consumption relationship is obtained.

10. An information data processing terminal, characterized in that, The information data processing terminal is used to implement the optimization range and energy consumption curve determination system for the constant speed pump unit as described in claim 7.

Images