Method, device and monitoring system for determining the operating efficiency of a feed pump turbine
Patent Information
- Application Number
- CN202310910363.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-21
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2043-07-21
Smart Images
Figure CN117191112B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of turbine operation monitoring technology, specifically to a method for determining the operating efficiency of a feedwater pump turbine, a device for determining the operating efficiency of a feedwater pump turbine, a feedwater pump turbine operating efficiency monitoring system, an electronic device, and a machine-readable storage medium. Background Technology
[0002] Boiler feedwater pumps are among the most power-consuming auxiliary machines in thermal power plants, accounting for approximately 2% to 4% of the main unit's power consumption. This energy consumption continues to increase with the continuous improvement of unit parameters and capacity. Since turbine-driven feedwater pumps offer significant operational economic advantages over electric motor-driven pumps, most boiler feedwater pumps in 300MW and above thermal power units are driven by small turbines. Therefore, online monitoring of the feedwater pump turbine efficiency is a primary task in diagnosing and improving its operational economy during actual operation.
[0003] Currently, online monitoring methods for feedwater pump turbine efficiency are complex and costly. Furthermore, due to the unique characteristics of turbines, the last-stage blades operate in the wet steam region, making it difficult to install measuring points and directly measure the exhaust humidity of small turbines. Therefore, it is impossible to directly and accurately determine the exhaust enthalpy of small turbines. Calculating the exhaust enthalpy of small turbines using the heat balance method requires monitoring multiple stages of steam parameters, which is cumbersome and difficult to operate. Summary of the Invention
[0004] The purpose of this invention is to provide a method for determining the operating efficiency of a feedwater pump turbine, so as to at least solve the problems that the above-mentioned methods for online monitoring of feedwater pump turbine efficiency are relatively complex and costly, and cannot directly and accurately determine the exhaust enthalpy of the small turbine. Calculating the exhaust enthalpy of the small turbine using the heat balance method requires monitoring multiple stages of steam parameters, which is cumbersome and difficult to operate.
[0005] To achieve the above objectives, a first aspect of the present invention provides a method for determining the operating efficiency of a feedwater pump turbine, the method comprising:
[0006] Obtain the inlet steam pressure, inlet steam temperature, inlet steam flow rate, speed, and torque of the feedwater pump turbine;
[0007] Based on the inlet steam pressure and the inlet steam temperature, the inlet steam enthalpy of the feedwater pump turbine is determined;
[0008] The operating efficiency of the feedwater pump turbine is determined based on the inlet steam flow rate, the rotational speed, the torque, and the inlet steam enthalpy.
[0009] Optionally, the enthalpy of the feedwater pump turbine is determined based on the inlet steam pressure and the inlet steam temperature, including:
[0010] Based on the inlet steam pressure and the inlet steam temperature, the inlet steam enthalpy of the feedwater pump turbine is determined by a preset relationship table or a preset fitting curve; wherein, the preset relationship table or the preset fitting curve is used to characterize the relationship between different inlet steam pressures and different inlet steam temperatures and the corresponding inlet steam enthalpy of the feedwater pump turbine.
[0011] Optionally, the operating efficiency of the feedwater pump turbine is determined based on the inlet steam flow rate, the rotational speed, the torque, and the inlet steam enthalpy, including:
[0012] The operating efficiency of the feedwater pump turbine is calculated using the following formula:
[0013]
[0014] Where, η T For the operating efficiency of the feedwater pump turbine; T QR N is the torque of the feedwater pump turbine; M is the speed of the feedwater pump turbine; H is the inlet steam flow rate of the feedwater pump turbine; η0 is the inlet steam enthalpy of the feedwater pump turbine; and η0 is the mechanical efficiency of the feedwater pump turbine transmission process.
[0015] A second aspect of the present invention provides a device for determining the operating efficiency of a feedwater pump turbine, the device comprising:
[0016] The parameter acquisition module is used to acquire the inlet steam pressure, inlet steam temperature, inlet steam flow rate, speed and torque of the feedwater pump turbine;
[0017] The steam inlet enthalpy determination module is used to determine the steam inlet enthalpy of the feedwater pump turbine based on the steam inlet pressure and the steam inlet temperature.
[0018] The operating efficiency determination module is used to determine the operating efficiency of the feedwater pump turbine based on the steam flow rate, the rotational speed, the torque, and the steam enthalpy.
[0019] Optionally, the steam inlet enthalpy determination module is specifically used for:
[0020] Based on the inlet steam pressure and the inlet steam temperature, the inlet steam enthalpy of the feedwater pump turbine is determined by a preset relationship table or a preset fitting curve; wherein, the preset relationship table or the preset fitting curve is used to characterize the relationship between different inlet steam pressures and different inlet steam temperatures and the corresponding inlet steam enthalpy of the feedwater pump turbine.
[0021] Optionally, the operating efficiency determination module is specifically used to calculate the operating efficiency of the feedwater pump turbine using the following formula:
[0022]
[0023] Where, η TFor the operating efficiency of the feedwater pump turbine; T QR N is the torque of the feedwater pump turbine; M is the speed of the feedwater pump turbine; H is the inlet steam flow rate of the feedwater pump turbine; η0 is the inlet steam enthalpy of the feedwater pump turbine; and η0 is the mechanical efficiency of the feedwater pump turbine transmission process.
[0024] A third aspect of the present invention provides a system for monitoring the operating efficiency of a feedwater pump turbine, the system comprising:
[0025] Pressure sensors, temperature sensors, and flow sensors are installed on the steam inlet pipe of the feedwater pump turbine to obtain the inlet steam pressure, inlet steam temperature, and inlet steam flow of the feedwater pump turbine.
[0026] A speed sensor is installed on the feedwater pump turbine to obtain the speed of the feedwater pump turbine;
[0027] A torque sensor is installed on the transmission clutch of the feedwater pump turbine to obtain the torque of the feedwater pump turbine.
[0028] The aforementioned feedwater pump turbine operating efficiency determination device is connected to the pressure sensor, the temperature sensor, the flow sensor, the speed sensor, and the torque sensor.
[0029] Optionally, the system further includes:
[0030] The display device, located in the central control room, is connected to the feedwater pump turbine operating efficiency determination device and is used to display the operating efficiency of the feedwater pump turbine in real time.
[0031] A fourth aspect of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-described method for determining the operating efficiency of a feedwater pump turbine.
[0032] On the other hand, the present invention also provides a machine-readable storage medium storing instructions for causing a machine to perform the above-described method for determining the operating efficiency of a feedwater pump turbine.
[0033] This scheme obtains the inlet steam pressure, inlet steam temperature, inlet steam flow rate, speed, and torque of the feedwater pump turbine. Based on the inlet steam pressure and temperature, the inlet steam enthalpy of the feedwater pump turbine is obtained. Then, using the inlet steam flow rate, speed, torque, and inlet steam enthalpy, the operating efficiency of the feedwater pump turbine is obtained. This method is simple to calculate, requires few parameters, and yields highly accurate operating efficiency results, providing data support for optimizing turbine operation.
[0034] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description
[0035] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:
[0036] Figure 1 This is a flowchart of the method for determining the operating efficiency of a feedwater pump turbine provided by the present invention;
[0037] Figure 2 This is a schematic diagram of the structure of the device for determining the operating efficiency of a water pump turbine provided by the present invention;
[0038] Figure 3 This is a schematic diagram of the structure of the feedwater pump turbine operating efficiency monitoring system provided by the present invention.
[0039] Explanation of reference numerals in the attached figures
[0040] 1- Device for determining the operating efficiency of the feedwater pump turbine; 2- Pressure sensor;
[0041] 3-Temperature sensor; 4-Flow sensor;
[0042] 5-Feedwater pump turbine; 6-Speed sensor;
[0043] 7-Torque sensor; 8-Display device;
[0044] 11-Parameter acquisition module; 12-Inlet steam enthalpy determination module;
[0045] 13-Operating efficiency determination module; 51-Steam inlet pipe;
[0046] 52 - Transmission clutch; 91 - Water pump;
[0047] 92-Condenser. Detailed Implementation
[0048] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.
[0049] In the embodiments of the present invention, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use.
[0050] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0051] The terms "parallel" and "perpendicular" do not mean that the components must be absolutely parallel or perpendicular, but rather that they can be slightly tilted. For example, "parallel" simply means that its direction is more parallel than "perpendicular," not that the structure must be completely parallel, but that it can be slightly tilted.
[0052] The terms "horizontal," "vertical," and "sag" do not imply that a component must be absolutely horizontal, vertical, or sagging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.
[0053] Furthermore, terms like "roughly" and "basically" are used to indicate that the content does not require absolute precision, but rather allows for a certain degree of deviation. For example, "roughly equal" does not simply mean absolute equality; in actual production and operation, achieving absolute "equality" is difficult, and a certain degree of deviation is generally present. Therefore, besides absolute equality, "roughly equal to" also includes the aforementioned situation where a certain degree of deviation exists. Using this as an example, in other cases, unless otherwise specified, terms like "roughly" and "basically" have similar meanings.
[0054] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0055] Figure 1 This is a flowchart of the method for determining the operating efficiency of a feedwater pump turbine provided by the present invention; Figure 2 This is a schematic diagram of the structure of the device for determining the operating efficiency of a water pump turbine provided by the present invention; Figure 3 This is a schematic diagram of the structure of the feedwater pump turbine operating efficiency monitoring system provided by the present invention.
[0056] Example 1
[0057] like Figure 1 As shown in the figure, this embodiment provides a method for determining the operating efficiency of a feedwater pump turbine, the method comprising:
[0058] Step 101: Obtain the inlet steam pressure, inlet steam temperature, inlet steam flow rate, speed, and torque of the feedwater pump turbine;
[0059] Specifically, in this embodiment, the inlet steam pressure, inlet steam temperature, inlet steam flow rate, speed, and torque of the feedwater pump turbine are all collected by corresponding sensors.
[0060] Step 102: Determine the enthalpy of the feedwater pump turbine based on the inlet steam pressure and the inlet steam temperature;
[0061] Specifically, in this embodiment, determining the enthalpy of the feedwater pump turbine based on the inlet steam pressure and the inlet steam temperature includes:
[0062] Based on the inlet steam pressure and the inlet steam temperature, the inlet steam enthalpy of the feedwater pump turbine is determined using a preset relationship table or a preset fitting curve. The preset relationship table or the preset fitting curve characterizes the relationship between different inlet steam pressures and temperatures and the corresponding inlet steam enthalpy of the feedwater pump turbine. The preset relationship table or preset fitting curve is obtained by analyzing and fitting historical data.
[0063] In another implementation, the enthalpy of the feedwater pump turbine can also be calculated using software for calculating the properties of water and steam, i.e., H = f(p,t).
[0064] Step 103: Determine the operating efficiency of the feedwater pump turbine based on the steam flow rate, the rotational speed, the torque, and the steam enthalpy.
[0065] In this embodiment, the operating efficiency of the feedwater pump turbine is calculated using the following formula:
[0066]
[0067] Where, η T For the operating efficiency of the feedwater pump turbine; T QR N is the torque of the feedwater pump turbine; M is the speed of the feedwater pump turbine; H is the inlet steam flow rate of the feedwater pump turbine; η0 is the inlet steam enthalpy of the feedwater pump turbine; and η0 is the mechanical efficiency of the feedwater pump turbine transmission process.
[0068] In another implementation, an alarm is generated when the calculated operating efficiency of the feedwater pump turbine is not within the preset range, so as to remind engineering technicians to optimize the operation mode of the small turbine in a timely manner to improve its efficiency and the thermal economy of the entire unit.
[0069] This solution involves fewer monitoring data points, uses a simple efficiency calculation method, and is flexible and convenient to apply. It can effectively monitor the efficiency of feedwater pump turbines online, helping engineers to grasp the efficiency of small turbines in a timely manner, providing data support for diagnosing the status of small turbines, and facilitating the optimization of small turbine operation, thereby improving its efficiency and the overall thermal economy of the unit.
[0070] Example 2
[0071] like Figure 2 As shown, this embodiment provides a device 1 for determining the operating efficiency of a feedwater pump turbine, the device comprising:
[0072] The parameter acquisition module 11 is used to acquire the inlet steam pressure, inlet steam temperature, inlet steam flow rate, speed and torque of the feedwater pump turbine;
[0073] The inlet steam enthalpy determination module 12 is used to determine the inlet steam enthalpy of the feedwater pump turbine based on the inlet steam pressure and the inlet steam temperature;
[0074] The steam enthalpy determination module 12 is specifically used for:
[0075] Based on the inlet steam pressure and the inlet steam temperature, the inlet steam enthalpy of the feedwater pump turbine is determined by a preset relationship table or a preset fitting curve; wherein, the preset relationship table or the preset fitting curve is used to characterize the relationship between different inlet steam pressures and different inlet steam temperatures and the corresponding inlet steam enthalpy of the feedwater pump turbine.
[0076] The operating efficiency determination module 13 is used to determine the operating efficiency of the feedwater pump turbine based on the steam flow rate, the rotational speed, the torque, and the steam enthalpy.
[0077] The operating efficiency determination module 13 is specifically used to calculate the operating efficiency of the feedwater pump turbine using the following formula:
[0078]
[0079] Where, η T For the operating efficiency of the feedwater pump turbine; T QR N is the torque of the feedwater pump turbine; M is the speed of the feedwater pump turbine; H is the inlet steam flow rate of the feedwater pump turbine; η0 is the inlet steam enthalpy of the feedwater pump turbine; and η0 is the mechanical efficiency of the feedwater pump turbine transmission process.
[0080] In another embodiment, the device further includes an alarm module, which generates an alarm when the calculated operating efficiency of the feedwater pump turbine is not within a preset range, so as to remind engineering technicians to optimize the operation mode of the small turbine in a timely manner to improve its efficiency and improve the thermal economy of the entire unit.
[0081] This solution involves fewer monitoring data points, uses a simple efficiency calculation method, and is flexible and convenient to apply. It can effectively monitor the efficiency of feedwater pump turbines online, helping engineers to grasp the efficiency of small turbines in a timely manner, providing data support for diagnosing the status of small turbines, and facilitating the optimization of small turbine operation, thereby improving its efficiency and the overall thermal economy of the unit.
[0082] Example 3
[0083] like Figure 3 As shown, a third aspect of the present invention provides a feedwater pump turbine operating efficiency monitoring system, the system comprising:
[0084] Pressure sensor 2, temperature sensor 3 and flow sensor 4 are installed on the steam inlet pipe 51 of the feedwater pump turbine 5 to obtain the steam inlet pressure, steam inlet temperature and steam inlet flow of the feedwater pump turbine 5.
[0085] A speed sensor 6 is installed on the feedwater pump turbine 5 to obtain the speed of the feedwater pump turbine 5;
[0086] A torque sensor 7 is installed on the transmission clutch 52 of the feedwater pump turbine 5 to obtain the torque of the feedwater pump turbine 5.
[0087] The aforementioned feedwater pump turbine operating efficiency determination device 1 is electrically or communicatively connected to the pressure sensor 2, the temperature sensor 3, the flow sensor 4, the speed sensor 5, and the torque sensor 7. The feedwater pump turbine operating efficiency determination device 1 includes:
[0088] The parameter acquisition module 11 is used to acquire the inlet steam pressure, inlet steam temperature, inlet steam flow rate, speed and torque of the feedwater pump turbine 5;
[0089] The inlet steam enthalpy determination module 12 is used to determine the inlet steam enthalpy of the feedwater pump turbine based on the inlet steam pressure and the inlet steam temperature;
[0090] The steam enthalpy determination module 12 is specifically used for:
[0091] Based on the inlet steam pressure and the inlet steam temperature, the inlet steam enthalpy of the feedwater pump turbine is determined by a preset relationship table or a preset fitting curve; wherein, the preset relationship table or the preset fitting curve is used to characterize the relationship between different inlet steam pressures and different inlet steam temperatures and the corresponding inlet steam enthalpy of the feedwater pump turbine.
[0092] The operating efficiency determination module 13 is used to determine the operating efficiency of the feedwater pump turbine 5 based on the steam flow rate, the rotational speed, the torque, and the steam enthalpy.
[0093] The operating efficiency determination module 13 is specifically used to calculate the operating efficiency of the feedwater pump turbine 5 using the following calculation formula:
[0094]
[0095] Where, ηT The operating efficiency of the feedwater pump turbine is expressed as a percentage (%); T QR The torque of the feedwater pump turbine is N / m; N is the rotational speed of the feedwater pump turbine, r / min; M is the inlet steam flow rate of the feedwater pump turbine, t / h; H is the inlet steam enthalpy of the feedwater pump turbine, kJ / kg; η0 is the mechanical efficiency of the feedwater pump turbine transmission process, in %.
[0096] Specifically, in this embodiment, a transmission clutch 52 is provided on the rotating shaft of the feedwater pump turbine. The transmission clutch 52 is equipped with a gear transmission device and a clutch inside, which is used to engage or disengage the torque sensor 7 online. This not only allows professional testing and inspection institutions to replace the high-precision torque meter online and carry out performance testing, but also makes it convenient for power plant engineers to disassemble the torque sensor 7 for periodic calibration and other work.
[0097] Optionally, the system further includes:
[0098] Display device 8, located in the central control room, is connected to the device for determining the operating efficiency of the feedwater pump turbine 5. It is used to display the operating efficiency of the feedwater pump turbine 5 in real time so as to intuitively obtain the trend of operating efficiency changes.
[0099] In another embodiment, the system further includes:
[0100] An audible and visual alarm device is installed in the central control room and connected to the feedwater pump turbine 5 operating efficiency determination device. It is used to generate an audible and visual alarm when the calculated operating efficiency of the feedwater pump turbine is not within the preset range, so as to remind engineering technicians to optimize the operation mode of the small turbine in time to improve its efficiency and improve the thermal economy of the entire unit.
[0101] More specifically, such as Figure 3 As shown, the drive shaft of the feedwater pump turbine 5 is connected to the feedwater pump, driving the feedwater pump 91 to supply water to the boiler; the exhaust end of the feedwater pump turbine 5 is also connected to the condenser 92 through the exhaust steam pipe.
[0102] In summary, this solution has the following advantages:
[0103] 1. The required online monitoring data is small, and the data analysis and calculation process is simple, which can effectively improve the online monitoring accuracy of the device;
[0104] 2. By setting up a transmission clutch, the torque sensor can be put into and taken out online. This not only allows professional testing and inspection institutions to replace high-precision torque meters online and conduct performance tests, but also makes it easier for power plant engineers to disassemble the torque sensor for periodic calibration and other work.
[0105] 3. By monitoring the efficiency of small steam turbines online, power plant engineers can understand the economics of their operation, which is conducive to optimizing the operation mode of small steam turbines, improving their efficiency, and improving the thermal economy of the entire unit.
[0106] 4. By monitoring the efficiency data of small steam turbines in real time, key data support can be provided for calculating the efficiency of boiler feedwater pumps, making it easier for power plant technicians to further obtain information on boiler feedwater pump efficiency.
[0107] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-described method for determining the operating efficiency of a feedwater pump turbine.
[0108] On the other hand, the present invention also provides a machine-readable storage medium storing instructions for causing a machine to perform the above-described method for determining the operating efficiency of a feedwater pump turbine.
[0109] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a microcontroller, chip, or processor to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.
[0110] The optional embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details described above. Within the scope of the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe the various possible combinations.
[0111] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the embodiments of the present invention, they should also be regarded as the content disclosed by the embodiments of the present invention.
Claims
1. A method for determining the operating efficiency of a feedwater pump turbine, characterized in that, The method includes: Obtain the inlet steam pressure, inlet steam temperature, inlet steam flow rate, speed, and torque of the feedwater pump turbine; Based on the inlet steam pressure and the inlet steam temperature, the inlet steam enthalpy of the feedwater pump turbine is determined; The operating efficiency of the feedwater pump turbine is determined based on the inlet steam flow rate, the rotational speed, the torque, and the inlet steam enthalpy. The determination of the operating efficiency of the feedwater pump turbine based on the inlet steam flow rate, the rotational speed, the torque, and the inlet steam enthalpy includes: The operating efficiency of the feedwater pump turbine is calculated using the following formula: ； in, To improve the operating efficiency of the feedwater pump turbine; The torque of the feedwater pump turbine; N The rotational speed of the feedwater pump turbine; M This refers to the steam inlet flow rate of the feedwater pump turbine. H The enthalpy of the steam entering the feedwater pump turbine; The mechanical efficiency of the steam turbine transmission process of the water pump.
2. The method for determining the operating efficiency of a feedwater pump turbine according to claim 1, characterized in that, Determining the inlet steam enthalpy of the feedwater pump turbine based on the inlet steam pressure and the inlet steam temperature includes: Based on the inlet steam pressure and the inlet steam temperature, the inlet steam enthalpy of the feedwater pump turbine is determined by a preset relationship table or a preset fitting curve; wherein, the preset relationship table or the preset fitting curve is used to characterize the relationship between different inlet steam pressures and different inlet steam temperatures and the corresponding inlet steam enthalpy of the feedwater pump turbine.
3. A device for determining the operating efficiency of a feedwater pump turbine, characterized in that, The device includes: The parameter acquisition module is used to acquire the inlet steam pressure, inlet steam temperature, inlet steam flow rate, speed and torque of the feedwater pump turbine; The steam inlet enthalpy determination module is used to determine the steam inlet enthalpy of the feedwater pump turbine based on the steam inlet pressure and the steam inlet temperature. The operating efficiency determination module is used to determine the operating efficiency of the feedwater pump turbine based on the steam flow rate, the rotational speed, the torque, and the steam enthalpy. Specifically, the operating efficiency determination module is used to calculate the operating efficiency of the feedwater pump turbine using the following formula: ； in, To improve the operating efficiency of the feedwater pump turbine; The torque of the feedwater pump turbine; N The rotational speed of the feedwater pump turbine; M This refers to the steam inlet flow rate of the feedwater pump turbine. H The enthalpy of the steam entering the feedwater pump turbine; The mechanical efficiency of the steam turbine transmission process of the water pump.
4. The device for determining the operating efficiency of a feedwater pump turbine according to claim 3, characterized in that, The steam enthalpy determination module is specifically used for: Based on the inlet steam pressure and the inlet steam temperature, the inlet steam enthalpy of the feedwater pump turbine is determined by a preset relationship table or a preset fitting curve; wherein, the preset relationship table or the preset fitting curve is used to characterize the relationship between different inlet steam pressures and different inlet steam temperatures and the corresponding inlet steam enthalpy of the feedwater pump turbine.
5. A system for monitoring the operating efficiency of a feedwater pump turbine, characterized in that, The system includes: Pressure sensors, temperature sensors, and flow sensors are installed on the steam inlet pipe of the feedwater pump turbine to obtain the inlet steam pressure, inlet steam temperature, and inlet steam flow of the feedwater pump turbine. A speed sensor is installed on the feedwater pump turbine to obtain the speed of the feedwater pump turbine; A torque sensor is installed on the transmission clutch of the feedwater pump turbine to obtain the torque of the feedwater pump turbine. The feedwater pump turbine operating efficiency determination device according to any one of claims 3-4, wherein the feedwater pump turbine operating efficiency determination device is connected to the pressure sensor, the temperature sensor, the flow sensor, the speed sensor and the torque sensor.
6. The feedwater pump turbine operating efficiency monitoring system according to claim 5, characterized in that, The system also includes: The display device, located in the central control room, is connected to the feedwater pump turbine operating efficiency determination device and is used to display the operating efficiency of the feedwater pump turbine in real time.
7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method for determining the operating efficiency of a feedwater pump turbine as described in any one of claims 1-2.
8. A machine-readable storage medium storing instructions for causing a machine to perform the method for determining the operating efficiency of a feedwater pump turbine as described in any one of claims 1-2.