A method for calculating energy efficiency ratio of a pump-type device based on data of the pump-type device of a ship

Abstract

The application discloses a method for calculating energy efficiency ratio of pump equipment based on ship pump equipment data, and belongs to the technical field of intelligent informationization of ships, and comprises the following steps: (1) uniform collection and processing of standard data of pump equipment; (2) establishment of a device energy efficiency calculation formula model; (3) adjustment of device energy efficiency calculation frequency; and (4) processing of device standard data collection abnormality and data calculation abnormality.The application can monitor the running state of pump equipment on line, calculate and analyze energy efficiency results, can prompt on-site operators to adjust the operation of the equipment, and can achieve the goal of energy saving and emission reduction.

Description

Technical Field

[0001] This invention belongs to the field of ship intelligent information technology, specifically relating to a method for calculating the energy efficiency ratio of ship pump equipment based on data from ship pump equipment. Background Technology

[0002] Carbon emission reduction is a key component of IMO (International Maritime Organization) greenhouse gas control, and the pressure to reduce carbon emissions from ships is significantly increasing. Ship equipment, as a major source of energy consumption, requires remote monitoring, analysis, and assessment of its energy consumption as an effective means to achieve carbon emission reductions and improve ship management. Conducting energy efficiency monitoring and assessment of ship equipment is of great significance for reducing carbon emissions and operating costs, and improving the level of energy efficiency management for ship equipment. In particular, pump equipment, which is a critical component of ship operation, mainly includes motors and pumps, generating substantial energy consumption during continuous operation. Without an effective method for monitoring energy efficiency, this could lead to energy waste and increased carbon emissions.

[0003] Currently, abnormal energy consumption of pump equipment is mainly judged manually, which has the problems of low accuracy in energy-saving assessment and poor energy-saving effect. Summary of the Invention

[0004] To address the issues of low accuracy and poor energy-saving performance in existing energy-saving assessment technologies, this invention provides a method for calculating the energy efficiency ratio of pump equipment based on data from marine pump equipment.

[0005] The technical solution of the present invention is as follows:

[0006] A method for calculating the energy efficiency ratio of marine pump equipment based on data from marine pump equipment, characterized by the following steps:

[0007] (1) Unified collection and processing of standard data for pump equipment;

[0008] (2) Establishment of equipment energy efficiency calculation formula model;

[0009] (3) Equipment energy efficiency calculation and frequency regulation;

[0010] (4) Handling abnormalities in equipment standard data acquisition and data calculation.

[0011] Preferably, the data to be collected in step (1) includes: pump motor flow rate, pump inlet pressure, pump outlet pressure, pump operating flow rate, pump motor operating voltage, and power factor.

[0012] Further preferred methods involve using data warehousing to perform unified data verification and data preprocessing on the monitoring data during the receiving process through a multi-threaded mechanism.

[0013] In a further preferred embodiment, the system connects to the ship's server and deploys an energy efficiency calculation program. First, a current sensor is installed at the motor's power input, pressure sensors at the pump inlet and outlet, and a flow meter at the pump outlet pipeline. Motor monitoring data and pump equipment monitoring data are collected via the current sensor, pressure sensor, and flow meter, respectively. Then, the system receives the collected information from the ship's pump equipment via TCP / IP in application / json format through the ship's local area network, receiving the data at a set frequency. The pump equipment monitoring data and maintenance parameters are synchronized to the operating condition server, and the instantaneous energy efficiency ratio is verified and calculated to obtain the equipment energy efficiency of the pump under test. Finally, the system connects to a MySQL database to store the equipment data, abnormal data, intermediate calculation values, and instantaneous energy efficiency ratio values.

[0014] Preferably, step (2) specifically includes the following steps:

[0015] The energy efficiency calculation formulas for ballast pumps, main seawater cooling pumps, cryogenic freshwater cooling pumps, and auxiliary boiler feedwater pumps are as follows:

[0016] ①

[0017] Where P in P is the input power of the pump motor. out The pump output power is expressed in kilowatts (kW).

[0018] Input power P of the ship pump set motor in The calculation formula is as follows:

[0019] ②

[0020] Where cosφ is the power factor;

[0021] P out The calculation formula is as follows:

[0022] ③

[0023] Where ρ is the density of the medium, g is the acceleration due to free fall, Q is the pump's operating flow rate, and H is the pump's head. The formula for calculating H is as follows:

[0024] ④

[0025] Where Δz is the height difference between the pump inlet and outlet, p1 is the pump inlet pressure, and p2 is the pump outlet pressure. Where Q is the pump inlet velocity, Q is the flow rate (read), and A1 is the pump inlet area (input). Let U1 be the pump outlet velocity, Q be the flow rate (read), and A2 be the pump outlet area (input). Substituting U1 and U2 into formula ④, and then substituting formula ④ into formula ③, we get:

[0026] ⑤;

[0027] When the ship pump set is a pipeline pump with equal inlet and outlet heights Δz=0, and the pump inlet and outlet areas A1 and A2 are the same, the output power formula can be simplified to:

[0028] ⑥;

[0029] The formula for the output power of the main engine oil pump is:

[0030] ⑦.

[0031] Preferably, step (3) specifically includes the following steps:

[0032] Different values ​​are set for the data receiving frequency and calculation frequency for each type of pump equipment. The instantaneous energy efficiency result is received according to the set instantaneous frequency, and the intermediate value and energy efficiency ratio are calculated at the same time. The average energy efficiency result is calculated according to the set frequency and the timer to complete the average energy efficiency ratio of a set of data.

[0033] Preferably, step (4) specifically includes the following steps:

[0034] By collecting equipment data, storing data that exceeds the valid range, fails data verification, or violates mathematical laws during calculations, and providing feedback on anomalies in different data under different circumstances, ship-shore personnel or equipment providers can quickly and accurately locate equipment data problems.

[0035] Further optimization allows for the configuration of the effective energy efficiency range in the custom settings: Level 3 energy efficiency range is 0%~60%, Level 2 energy efficiency range is 60%~80%, and Level 1 energy efficiency range is 80%~100%. Abnormal data includes data exceeding the specified range, or data that needs to be empty, such as an empty denominator in a calculation formula.

[0036] The technical effects of this invention are as follows:

[0037] This invention collects data from ship pumps, integrates energy efficiency data of major energy-consuming equipment on ships, develops and demonstrates an energy efficiency rating and optimization management system on ships, enables remote monitoring, analysis and rating of equipment energy consumption, and establishes a formula model to calculate the energy efficiency ratio of pumps, thereby strengthening the control of ship energy consumption, reducing ship carbon emissions, lowering ship operating costs, and effectively improving the energy efficiency management level of ship equipment.

[0038] This invention calculates the output and input energy of ship pumps based on monitoring data, reads custom input data, and summarizes energy efficiency calculation model formulas. The energy efficiency ratio is obtained by the ratio of output energy to input energy, which enables professionals to verify the energy efficiency ratio of ship pumps and effectively improves the quality of ship pump operation and management, and controls equipment energy.

[0039] This invention aims to detect the energy consumption of pump equipment, monitor its data, calculate energy consumption, and, based on the calculated energy efficiency results, perform energy efficiency rating, consumption comparison, and equipment adjustment during equipment operation to improve equipment energy efficiency management. Specifically, the pump energy efficiency calculation can be applied to five types of equipment: ballast pumps; main seawater cooling pumps; low-temperature freshwater cooling pumps; main lubricating oil pumps; and auxiliary boiler feedwater pumps.

[0040] Since the efficiency of pump equipment depends not only on the manufacturing level of the equipment itself, but also on the operating conditions of the motor and pump, online monitoring of the operating status of pump equipment and calculation and analysis of energy efficiency results can prompt on-site operators to make adjustments to the equipment to achieve the goal of energy conservation and emission reduction. Attached Figure Description

[0041] Figure 1 This is a flowchart illustrating the energy efficiency calculation process for pump-type equipment as an example. Detailed Implementation

[0042] To better understand the present invention, the invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0043] Example

[0044] like Figure 1 As shown, a method for calculating the energy efficiency ratio of ship pump equipment based on data of ship pump equipment includes the following steps:

[0045] (1) Unified collection and processing of equipment standard data.

[0046] The data to be collected includes: pump motor flow rate, pump inlet pressure, pump outlet pressure, pump operating flow rate, pump motor operating voltage, and power factor.

[0047] Through data warehousing, a multi-threaded mechanism is used to perform unified data verification, data preprocessing, and instantaneous energy efficiency data calculation on the monitoring data during the receiving process.

[0048] Preprocessing the collected data includes, for example, handling decimal places or performing some minor preprocessing before calculation. For instance, a certain calculation factor in the formula is not directly collected from the device, but needs to be preliminarily calculated based on the collected data.

[0049] Ships have various types of pumps, such as ballast pumps, main seawater cooling pumps, cryogenic freshwater cooling pumps, main engine lubricating oil pumps, and auxiliary boiler feed pumps. For different types of pumps, up to 20 threads are used to process and preprocess the data. The verification primarily involves data format validation and data range validation for different pump types. Since some calculation factors in the equipment's formulas are not directly obtained from the equipment but are derived through relatively simple calculations, some preprocessing calculations are performed during data collection before the data is entered into the database.

[0050] Specifically, the process involves connecting to the ship's server and deploying an energy efficiency calculation program. First, a current sensor is installed at the motor's power input, pressure sensors at the pump inlet and outlet, and a flow meter at the pump outlet. These sensors collect monitoring data for the motor and related pump equipment. Then, via the ship's local area network, the system receives the collected pump equipment information via TCP / IP in application / json format, receiving the data at a set frequency and synchronizing the pump equipment monitoring data and maintenance parameters to the operating condition server. The instantaneous energy efficiency ratio is then calculated to determine the energy efficiency of the pump equipment under test. Finally, the system connects to a MySQL database to store the equipment data, abnormal data, intermediate calculation values, and the instantaneous energy efficiency ratio.

[0051] The verification process typically involves randomly selecting some information samples and then manually calculating them according to the formula to verify whether the values ​​calculated by the program are accurate.

[0052] (2) Establishment of equipment energy efficiency calculation formula model.

[0053] Specifically, the following steps are included:

[0054] The energy efficiency calculation formulas for ballast pumps, main seawater cooling pumps, cryogenic freshwater cooling pumps, and auxiliary boiler feedwater pumps are as follows:

[0055] ①

[0056] Where P in P is the input power of the pump motor. out The pump output power is expressed in kilowatts (kW).

[0057] Input power P of the ship pump set motor in The calculation formula is as follows:

[0058] ②

[0059] Where cosφ is the power factor;

[0060] Pout The calculation formula is as follows:

[0061] ③

[0062] Where ρ is the density of the medium, g is the acceleration due to free fall, Q is the pump's operating flow rate, and H is the pump's head. The formula for calculating H is as follows:

[0063] ④

[0064] Where Δz is the height difference between the pump inlet and outlet, p1 is the pump inlet pressure, and p2 is the pump outlet pressure. The pump inlet velocity is (Q is the flow rate - read, A1 is the pump inlet area - input). The pump outlet velocity is represented by Q (flow rate - readout) and A2 (pump outlet area - input). The pump inlet area refers to the effective flow area at the pump inlet (usually the cross-sectional area corresponding to the suction flange or suction pipe diameter), and is one of the important parameters for measuring the pump's suction capacity. The pump outlet area is the effective flow area at the outlet. This data is not collected by the equipment but is measured and manually entered into the system by management personnel; therefore, it is referred to as pump inlet area - input and pump outlet area - input.

[0065] Substituting U1 and U2 into formula ④, and then substituting formula ④ into formula ③, we get:

[0066] ⑤;

[0067] When the ship pump set is a pipeline pump with equal inlet and outlet heights Δz=0, and the pump inlet and outlet areas A1 and A2 are the same, the output power formula can be simplified to:

[0068] ⑥;

[0069] The formula for the output power of the main engine oil pump is:

[0070] ⑦.

[0071] (3) Equipment energy efficiency calculation and frequency regulation.

[0072] Based on the operating status of pump equipment, different values ​​are set for the data reception frequency and calculation frequency for each type of pump equipment. The instantaneous energy efficiency result is received according to the set instantaneous frequency, and the intermediate value and energy efficiency ratio are calculated simultaneously. The average energy efficiency result is calculated according to the set frequency and timer to complete the average energy efficiency ratio of a set of data.

[0073] Each device's raw values ​​correspond to a data range, and the calculation frequency can be adjusted by customizing the average energy efficiency calculation and instantaneous energy efficiency calculation frequency for each device.

[0074] The default calculation frequency is usually once per minute. Since the required calculation frequency may vary depending on the business scenario, the instantaneous energy efficiency and average energy efficiency calculation frequency of pump equipment can be set separately in the management system for the specific scenario. For example, it can be calculated once every 10 seconds or once every 2 minutes to meet the calculation needs of different scenarios.

[0075] Connecting to the MySQL database of the energy efficiency assessment service, the system queries the data range required for the average energy efficiency ratio (EER) calculation according to the set average calculation frequency. Using the intermediate values ​​calculated during data reception and the received data, the system calculates the sum of the input and output power of the pump data within this range to obtain the average EER for the pump equipment. Compared to the instantaneous EER, the average EER provides a more objective and accurate reflection of the energy consumption and operating status of the pump equipment.

[0076] (4) Handling abnormalities in equipment standard data acquisition and data calculation.

[0077] By collecting equipment data, storing data that exceeds the valid range, fails data verification, or violates mathematical laws during calculations, and providing feedback on anomalies in different data under different circumstances, ship-shore personnel or equipment providers can quickly and accurately locate equipment data problems.

[0078] The effective range of energy efficiency can be configured in the custom settings. The range for Level 3 energy efficiency is 0%~60%, for Level 2 it is 60%~80%, and for Level 1 it is 80%~100%. Abnormal data includes data that exceeds the specified range, or data that needs to be empty, such as an empty denominator in a calculation formula.

[0079] After collecting data from pump equipment, the marine equipment energy efficiency data integration system pushes the data to the energy efficiency assessment service via TCP / IP protocol. The energy efficiency assessment service then activates multiple threads (up to 20) to receive data from different pump equipment. After data verification and preprocessing calculations, the data is stored in the database. Based on the instantaneous energy efficiency ratio calculation frequency settings in the custom configuration, the system calculates the instantaneous energy efficiency ratio according to the formula. The average energy efficiency ratio is calculated by averaging all instantaneous energy efficiency ratio data within a specified time period, based on the time settings in the custom configuration, to obtain more objective and accurate energy efficiency ratio data.

[0080] When data acquisition is abnormal, such as exceeding the data size range or the necessary data being empty, the system will record a log and the testing personnel will report it to the ship equipment energy efficiency data integration system to check the cause and readjust the data to be sent.

Claims

1. A method for calculating the energy efficiency ratio of marine pump equipment based on data from marine pump equipment, characterized in that, Includes the following steps: (1) Unified collection and processing of standard data for pump equipment; (2) Establishment of equipment energy efficiency calculation formula model; (3) Frequency adjustment for equipment energy efficiency calculation; (4) Handling abnormalities in equipment standard data acquisition and data calculation.

2. The method according to claim 1, characterized in that, The data to be collected in step (1) includes: pump motor flow rate, pump inlet pressure, pump outlet pressure, pump operating flow rate, pump motor operating voltage, and power factor.

3. The method according to claim 2, characterized in that, By using data warehousing methods, a multi-threaded mechanism is used to perform unified data verification and data preprocessing on the monitoring data during the receiving process.

4. The method according to claim 3, characterized in that, The process involves connecting to the ship's server and deploying an energy efficiency calculation program. First, a current sensor is installed at the motor's power input, pressure sensors at the pump inlet and outlet, and a flow meter at the pump outlet pipeline. These sensors collect monitoring data for the motor and pumps, respectively. Then, the system receives the pump data via TCP / IP in application / json format through the ship's local area network, receiving the data at a set frequency. The pump monitoring data and maintenance parameters are synchronized to the operating condition server, and the instantaneous energy efficiency ratio is calculated to obtain the energy efficiency of the pump under test. Finally, the system connects to a MySQL database to store the equipment data, abnormal data, intermediate calculation values, and instantaneous energy efficiency ratio values.

5. The method according to claim 1, characterized in that, Step (2) specifically includes the following steps: The energy efficiency calculation formulas for ballast pumps, main seawater cooling pumps, cryogenic freshwater cooling pumps, and auxiliary boiler feedwater pumps are as follows: ① Where P in P is the input power of the pump motor. out The pump output power is expressed in kilowatts (kW). Input power P of the ship pump set motor in The calculation formula is as follows: ② Where cosφ is the power factor; P out The calculation formula is as follows: ③ Where ρ is the density of the medium, g is the acceleration due to free fall, Q is the pump's operating flow rate, and H is the pump's head. The formula for calculating H is as follows: ④ Where Δz is the height difference between the pump inlet and outlet, p1 is the pump inlet pressure, and p2 is the pump outlet pressure. Where Q is the pump inlet velocity, Q is the flow rate (read), and A1 is the pump inlet area (input). Let U1 be the pump outlet velocity, Q be the flow rate (read), and A2 be the pump outlet area (input). Substituting U1 and U2 into formula ④, and then substituting formula ④ into formula ③, we get: ⑤； When the ship pump set is a pipeline pump with equal inlet and outlet heights Δz=0, and the pump inlet and outlet areas A1 and A2 are the same, the output power formula can be simplified to: ⑥； The formula for the output power of the main engine oil pump is: ⑦。 6. The method according to claim 1, characterized in that, Step (3) specifically includes the following steps: Different values ​​are set for the data receiving frequency and calculation frequency for each type of pump equipment. The instantaneous energy efficiency result is received according to the set instantaneous frequency, and the intermediate value and energy efficiency ratio are calculated at the same time. The average energy efficiency result is calculated according to the set frequency and the timer to complete the average energy efficiency ratio of a set of data.

7. The method according to claim 1, characterized in that, Step (4) specifically includes the following steps: By collecting equipment data, storing data that exceeds the valid range, fails data verification, or violates mathematical laws during calculations, and providing feedback on anomalies in different data under different circumstances, ship-shore personnel or equipment providers can quickly and accurately locate equipment data problems.

8. The method according to claim 7, characterized in that, The effective range of energy efficiency is configured in the custom settings. The range for Level 3 energy efficiency is 0%~60%, for Level 2 it is 60%~80%, and for Level 1 it is 80%~100%.

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