Ship energy-saving system monitoring device and ship energy-saving system energy-saving efficiency calculation method

Abstract

The invention provides a ship energy-saving system monitoring device and a ship energy-saving system energy-saving efficiency calculation method. The ship energy-saving system monitoring device comprises a ship central control system, a host shaft power monitor, a ship power station management system and a log. The ship central control system is used for receiving and processing data sent by the main engine shaft power monitor, the ship power station management system and the log; the main engine shaft power monitor is used for detecting the running power of a main engine shaft; the ship power station management system is used for acquiring the output power PVFD0 of the frequency conversion system, the power generation power PSG of the axle generator and the power PALS0 consumed by starting the air resistance reduction system; the log is used for measuring the sailing speed of the ship. By adopting the method for calculating the energy-saving efficiency of the ship energy-saving system, the actual energy-saving efficiency of the ship energy-saving system can be accurately obtained in the trial voyage stage, and accurate energy-saving data are provided for operation management of the ship.

Description

Technical Field

[0001] The present application belongs to the field of ship energy-saving systems, and in particular, relates to a ship energy-saving system monitoring device and a ship energy-saving system energy-saving efficiency calculation method. Background Art

[0002] In order to meet environmental protection requirements, energy-saving systems are installed on ships. The energy-saving efficiency of energy-saving systems is usually calculated theoretically; or after the ship is delivered, the fuel consumption data is collected through the fuel mass flow meter installed on the ship, and then the total energy-saving data is calculated based on the statistics of ship data over the years. However, the energy-saving efficiency calculated by the above two methods has a large error with the actual energy-saving efficiency of the ship. Summary of the invention

[0003] One of the purposes of the present application is to provide a ship energy-saving system monitoring device and a ship energy-saving system energy-saving efficiency calculation method, which can obtain the actual energy-saving efficiency of the ship energy-saving system.

[0004] To achieve the above-mentioned purpose and other related purposes, the present application provides a ship energy-saving system monitoring device, the ship energy-saving system includes a frequency conversion system, a shaft generator system, and an air drag reduction system, and the shaft generator system includes a shaft generator; it is characterized in that the ship energy-saving system monitoring device includes: a ship central control system, a main engine shaft power monitor, a ship power station management system, and a speed meter;

[0005] The ship central control system is used to receive and process data sent from the main engine shaft power monitor, the ship power station management system, and the odometer;

[0006] The main engine shaft power monitor is used to detect the main engine shaft operating power;

[0007] The ship power station management system is used to obtain the output power P of the frequency conversion system VFD0 , the power generation power P of the shaft belt generator SG And the power consumed by turning on the air drag reduction system P ALS0 ;

[0008] The speedometer is used to measure the sailing speed of the ship.

[0009] The present application also provides a method for calculating the energy-saving efficiency of a ship energy-saving system, using the above-mentioned monitoring device, and the calculation method comprises the following steps:

[0010] The ship power station management system obtains the output power P of the frequency conversion system VFD0 , the power generation power P of the shaft belt generator SG , and the power P consumed by turning on the air drag reduction system ALS0; The odometer obtains the navigation speed; the main engine shaft power monitor obtains the main engine shaft operating power;

[0011] According to the output power P of the frequency conversion system VFD0 And the theoretical output power of the non-frequency conversion system, the energy-saving power P of the frequency conversion system is calculated VFD1 ;

[0012] According to the power generation power P of the shaft belt generator SG Calculation of energy-saving power P of shaft generator system SG1 ;

[0013] According to the navigation speed, the operating power of the main engine shaft and the power consumed by opening the air drag reduction system ALS0 , calculate the energy saving power P of the air drag reduction system ALS1 ;

[0014] According to the frequency conversion system energy saving power P VFD1 、The energy-saving power P of the shaft generator system SG1 And the energy saving power P of the air drag reduction system ALS1 , and get the energy-saving power P of the ship energy-saving system S , the energy-saving power P of the ship energy-saving system S The calculation formula is as follows:

[0015] P S =P VFD1 +P SG1 +P ALS1 .

[0016] This application has at least the following beneficial effects:

[0017] According to the ship energy-saving system monitoring device and the ship energy-saving system energy-saving efficiency calculation method of the present application, the actual energy-saving efficiency of the ship energy-saving system can be accurately obtained during the sea trial stage, which is used to verify the theoretical energy-saving effect of the ship energy-saving system and provide accurate energy-saving data for the operation and management of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural block diagram of a ship energy-saving system monitoring device according to an embodiment of the present application;

[0020] Figure 2 The data processing flow chart of the ship energy-saving system monitoring device according to the embodiment of the present application is shown;

[0021] Illustration Description:

[0022] 1. Ship central control system; 2. Main engine shaft power monitor; 3. Ship power station management system; 4. Speedometer; 5. Shaft generator system; 6. Frequency conversion system; 7. Air drag reduction system; 8. Engine room frequency conversion fan; 9. Seawater frequency conversion pump; 10. Main engine speed sensor. DETAILED DESCRIPTION

[0023] The following describes the implementation methods of the present application through specific specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementation methods, and the details in the present application can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0024] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be considered as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0025] In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more than two. For example, multiple processing units refer to two or more processing units, etc., and multiple elements refer to two or more elements, etc.

[0026] Reference Figure 1 and Figure 2 The ship energy-saving system includes a frequency conversion system 6, a shaft generator system 5 (also referred to as a shaft generator system), and an air drag reduction system 7. The shaft generator system 5 includes a shaft generator.

[0027] The frequency conversion system 6 includes a cabin frequency conversion fan 8 (installed in the cabin area) and a seawater frequency conversion pump 9; the cabin frequency conversion fan 8 and the seawater frequency conversion pump 9 use frequency conversion motors, which can be adjusted according to user needs, thereby achieving frequency conversion and energy saving effects.

[0028] The shaft generator is installed on the main engine bearing, and the shaft generator uses the redundant power of the main engine to generate electricity. The air drag reduction system 7 is a ship energy-saving device, which blows compressed air to the bottom of the ship to generate bubbles at the bottom of the ship, and the bubbles reduce the ship's sailing resistance and increase the sailing speed.

[0029] The air drag reduction system 7 consumes a large amount of electrical energy. Therefore, when the air drag reduction system 7 is turned on, the shaft generator system 5 is turned on at the same time to provide the electrical energy consumed by the air drag reduction system 7 .

[0030] The present application provides a ship energy-saving system monitoring device, which includes: a ship central control system 1, a main engine shaft power monitor 2, a ship power station management system 3 and a speed meter 4;

[0031] The ship central control system 1 is used to receive and process data sent from the main engine shaft power monitor 2, the ship power station management system 3, and the speed meter 4;

[0032] Main engine shaft power monitor 2, used to detect the main engine shaft operating power;

[0033] Ship power station management system 3, used to obtain the output power P of the frequency conversion system VFD0 , the power generation of the shaft generator P SG And the power P consumed by opening the air drag reduction system 7 ALS0 The ship power station management system 3 can manage the electric energy generated by the ship generator and the shaft generator, and distribute electric energy to the frequency conversion system 6 and the air drag reduction system 7. The shaft generator is controlled by the ship power station management system 3. When the shaft generator is put into use, the ship power station management system 3 can reduce the power generation of other generators.

[0034] The speedometer 4 is used to measure the sailing speed of the ship.

[0035] In some embodiments, reference Figure 1 The monitoring device also includes a main engine speed sensor 10, which is used to collect the main engine speed and transmit the data containing the main engine speed to the ship central control system 1, so that the ship central control system 1 can select the main engine shaft operating power according to the main engine speed data.

[0036] In some embodiments, reference Figure 2 The monitoring device also includes an API interface, which is used to summarize the data processed by the ship central control system 1 and display it on the MIMIC diagram. VFD1 , Energy-saving power P of shaft generator system SG1 And the air drag reduction system energy saving power P ALS1 The values ​​can be summarized through the API interface and displayed in the MIMIC diagram, which is a data visualization diagram. The interface of the MIMIC diagram can be designed as a voyage energy-saving efficiency comparison diagram according to user needs, and real-time energy-saving efficiency monitoring can be performed for different energy-saving systems.

[0037] In some embodiments, reference Figure 2 The monitoring device also includes an API interface, which is used to transmit the data processed by the ship central control system 1 to the ship local area network. VFD1 , Energy-saving power P of shaft generator system SG1 And the air drag reduction system energy saving power P ALS1 The values ​​can also be sent to the ship operation management platform on shore for monitoring and analysis through the ship's local area network.

[0038] This embodiment also provides a method for calculating the energy-saving efficiency of a ship energy-saving system, using the above-mentioned monitoring device, and the calculation method includes the following steps:

[0039] Ship power station management system 3 obtains the output power P of the frequency conversion system VFD0 , the power generation of the shaft generator P SG , and the power P consumed by opening the air drag reduction system 7 ALS0 ; The speedometer 4 obtains the navigation speed; the main engine shaft power monitor 2 obtains the main engine shaft operating power;

[0040] According to the output power P of the frequency conversion system VFD0 And the theoretical output power of the non-frequency conversion system, the energy-saving power P of the frequency conversion system is calculated VFD1 ;

[0041] According to the shaft generator power P SG Calculation of energy-saving power P of shaft generator system SG1 ;

[0042] According to the sailing speed, the main engine shaft operating power and the power consumed by the air drag reduction system 7, ALS0 , calculate the energy saving power P of the air drag reduction system ALS1 ;

[0043] According to the energy saving power P of the frequency conversion system VFD1 , Energy-saving power P of shaft generator system SG1 And the air drag reduction system energy saving power P ALS1 , and get the energy-saving power P of the ship energy-saving system S , energy-saving power of ship energy-saving system P S The calculation formula is as follows:

[0044] P S =P VFD1 +P SG1 +P ALS1

[0045] The following details the energy saving power P of the frequency conversion system VFD1 , Energy-saving power P of shaft generator system SG1 And the air drag reduction system energy saving power PALS1 Calculation method:

[0046] Calculate the energy-saving power P of the frequency conversion system VFD1 ; Frequency conversion system energy saving power P VFD1 is the difference between the operating power of the non-frequency conversion system and the output power of the frequency conversion system. The non-frequency conversion system includes the cabin non-frequency conversion fan and the seawater non-frequency conversion pump. The frequency conversion system 6 includes the cabin frequency conversion fan 8 and the seawater frequency conversion pump 9. Therefore, the energy-saving power of the frequency conversion system P VFD1 The calculation formula is as follows:

[0047] P VFD1 =P V0 +P S0 -P VFD0

[0048] Among them, P V0 is the theoretical operating power of the non-variable frequency fan in the nacelle, P S0 The theoretical operating power of the non-variable frequency fan in the engine room and the theoretical operating power of the non-variable frequency pump in the seawater can be obtained based on the energy consumed by the non-variable frequency fan in the engine room and the non-variable frequency pump in the seawater within a predetermined time. The energy consumed by the non-variable frequency fan in the engine room and the non-variable frequency pump in the seawater can be collected every 15 minutes. The theoretical operating power P of the non-variable frequency fan in the engine room can be calculated by calculating the average value of multiple sets of collected data. V0 Theoretical operating power P of seawater non-variable frequency pump S0 .

[0049] Theoretical operating power P of non-variable frequency fan in computer cabin V0 Theoretical operating power P of seawater non-variable frequency pump S0 When the non-converter system is used, the specifications of the cabin non-converter fan of the non-converter system and the frequency conversion system 6 including the cabin variable frequency fan 8 are required to be the same, and the specifications of the seawater non-converter pump of the non-converter system and the seawater variable frequency pump 9 of the frequency conversion system 6 are required to be the same.

[0050] Among them, P VFD0 is the output power of the frequency conversion system. VFD0 It is the sum of the output power of the engine room variable frequency fan 8 and the output power of the seawater variable frequency pump 9. The output power P of the variable frequency system VFD0 It can be obtained through the data obtained in real time by the ship's central control system 1.

[0051] Calculation of energy-saving power P of shaft generator system SG1 ; The shaft generator system 5 includes a shaft generator, the shaft generator system energy saving power P SG1 The power generated by the shaft generator is P SG .

[0052] Calculate the energy saving power P of the air drag reduction systemALS1 ; Calculate the energy saving power P of the air drag reduction system ALS1 The following calculation formula is used:

[0053] P ALS1 =(P m0 -P m1 )+P V2 -P ALS0

[0054] The main shaft operating power P without opening the air drag reduction system 7 m0 The main shaft operating power P with the air drag reduction system 7 turned on m1 It can be monitored by the main engine shaft power monitor 2.

[0055] The power gain P brought by turning on the air drag reduction system 7 to increase the sailing speed V2 The navigation gain speed V 2 The preset calculation formula is used to obtain the relationship between the navigation gain speed and the power gain brought by the navigation speed increase. The preset calculation formula can be pre-introduced into the ship central control system 1.

[0056] Sailing gain speed V 2 The cruising speed V with the air drag reduction system 7 turned on can be recorded by the speedometer 4 1 Compared with the cruising speed V without opening the air drag reduction system 7 0 The difference between the two is obtained. The cruising speed V without opening the air drag reduction system 7 0 It is the navigation speed of the ship in the navigation area under stable sea conditions during the sea trial.

[0057] The energy-saving efficiency calculation method of the ship energy-saving system can accurately obtain the energy-saving efficiency of the ship energy-saving system during the trial voyage, which is used to verify the theoretical energy-saving effect of the ship energy-saving system and provide accurate energy-saving data for the operation and management of the ship.

[0058] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present application. These improvements and substitutions should also be regarded as the scope of protection of the present application.

Claims

1. A monitoring device for a ship energy-saving system, wherein the ship energy-saving system comprises a frequency conversion system, a shaft generator system, and an air drag reduction system, wherein the shaft generator system comprises a shaft generator; characterized in that: The ship energy-saving system monitoring device includes: a ship central control system, a main engine shaft power monitor, a ship power station management system and a speed meter; The ship central control system is used to receive and process data sent from the main engine shaft power monitor, the ship power station management system, and the odometer; The main engine shaft power monitor is used to detect the main engine shaft operating power; The ship power station management system is used to obtain the output power P of the frequency conversion system VFD0 , the power generation power P of the shaft belt generator SG And the power consumed by turning on the air drag reduction system P ALS0 ; The speedometer is used to measure the sailing speed of the ship.

2. The monitoring device according to claim 1, characterized in that: The monitoring device also includes a main engine speed sensor, which is used to collect the main engine speed and transmit data containing the main engine speed to the ship's central control system, so that the ship's central control system can select the main engine shaft operating power according to the main engine speed data.

3. The monitoring device according to claim 1, characterized in that: The monitoring device also includes an API interface, and the API interface is used to summarize the data processed by the ship central control system and display it on a MIMIC diagram.

4. The monitoring device according to claim 1, characterized in that: The monitoring device also includes an API interface, which is used to transmit the data processed by the ship's central control system to the ship's local area network.

5. A method for calculating energy-saving efficiency of a ship energy-saving system, characterized in that: Using the monitoring device according to any one of claims 1 to 4, the calculation method comprises the following steps: The ship power station management system obtains the output power P of the frequency conversion system VFD0 , the power generation power P of the shaft belt generator SG , and the power P consumed by turning on the air drag reduction system ALS0 ; The odometer obtains the navigation speed; the main engine shaft power monitor obtains the main engine shaft operating power; According to the output power P of the frequency conversion system VFD0 And the theoretical output power of the non-frequency conversion system, the energy-saving power P of the frequency conversion system is calculated VFD1 ; According to the power generation power P of the shaft belt generator SG Calculation of energy-saving power P of shaft generator system SG1 ; According to the navigation speed, the operating power of the main engine shaft and the power consumed by opening the air drag reduction system ALS0 , calculate the energy saving power P of the air drag reduction system ALS1 ; According to the frequency conversion system energy saving power P VFD1 、The energy-saving power P of the shaft generator system SG1 And the energy saving power P of the air drag reduction system ALS1 , and get the energy-saving power P of the ship energy-saving system S , the energy-saving power P of the ship energy-saving system S The calculation formula is as follows: P S =P VFD1 +P SG1 +P ALS1 。 6. The method for calculating energy-saving efficiency of a ship energy-saving system according to claim 5, characterized in that: Calculate the energy saving power P of the frequency conversion system VFD1 The following calculation formula is used: P VFD1 =P V0 +P S0 -P VFD0 Among them, the non-variable frequency system includes the engine room non-variable frequency fan and the seawater non-variable frequency pump, P V0 is the theoretical operating power of the non-variable frequency fan in the nacelle, P S0 is the theoretical operating power of the seawater non-variable frequency pump, P VFD0 The frequency conversion system outputs power.

7. The method for calculating energy-saving efficiency of a ship energy-saving system according to claim 5, characterized in that: The energy saving power P of the shaft generator system SG1 The power generated by the shaft generator is P SG .

8. The method for calculating energy-saving efficiency of a ship energy-saving system according to claim 5, characterized in that: Calculate the energy saving power P of the air drag reduction system ALS1 The following calculation formula is used: P ALS1 =(P m0 -P m1 )+P V2 -P ALS0 Among them, P m0 is the main engine shaft operating power without opening the air drag reduction system, P m1 The main shaft operating power of the air drag reduction system is P V2 To turn on the air drag reduction system to increase the sailing speed and bring about the power gain, P ALS0 The power consumed to activate the air drag reduction system.

9. The method for calculating energy-saving efficiency of a ship energy-saving system according to claim 8, characterized in that: The power gain P brought about by turning on the air drag reduction system to increase the sailing speed V2 The navigation gain speed V2 is obtained by substituting the navigation gain speed V2 into a preset calculation formula. The navigation gain speed V2 is obtained by the difference between the navigation speed V1 with the air drag reduction system turned on and the navigation speed V0 without the air drag reduction system turned on, as recorded by the odometer. The preset calculation formula is the relationship between the navigation gain speed and the power gain brought about by the increase in navigation speed.

10. The method for calculating energy-saving efficiency of a ship energy-saving system according to claim 8, characterized in that: The sailing speed V0 without turning on the air drag reduction system is the sailing speed of the ship in the sailing area under stable sea conditions during the sea trial.

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