Ship carbon emission accounting method and device and ship operation management system

Abstract

This application discloses a method, apparatus, and ship operation management system for calculating ship carbon emissions, belonging to the field of ship energy efficiency and environmental monitoring technology. The method includes: acquiring multi-source ship data, including ship fuel data and carbon emission monitoring data; calculating the total carbon emissions of the ship based on the fuel data and generating a first carbon emission dataset; calculating the total carbon emissions of the ship based on the carbon emission monitoring data and generating a second carbon emission dataset; comparing the first carbon emission dataset and the second carbon emission dataset, and outputting the optimal carbon emission result.

Description

Technical Field

[0001] This application relates to the field of ship energy efficiency and environmental monitoring technology, and in particular to a ship carbon emission accounting method, device and ship operation management system. Background Technology

[0002] Currently, ship carbon emission accounting mainly relies on two types of methods: one is the indirect calculation method based on fuel consumption, which uses theoretical estimation based on fuel consumption and carbon emission coefficients; the other is the direct measurement method based on real-time flue gas monitoring, which calculates emissions in real time by detecting CO2 concentration and flue gas flow rate in the flue. Each method has its own applicability and limitations: the indirect calculation method is affected by factors such as fuel composition and measurement errors, and cannot fully represent actual emissions; while the direct measurement method depends on the accuracy and stability of the monitoring equipment.

[0003] However, existing technologies lack carbon emission accounting methods that can systematically integrate the two types of data sources mentioned above and achieve cross-validation and optimized selection. Summary of the Invention

[0004] This application provides a method, apparatus, and ship operation management system for calculating ship carbon emissions, in order to at least partially solve the above-mentioned technical problems.

[0005] To achieve the above objectives, according to the first aspect of this application, a method for calculating ship carbon emissions is provided, comprising: Acquire multi-source data of the ship, which includes the ship's fuel data and carbon emission monitoring data; Based on the fuel data, the total carbon emissions of the ship are calculated, and a first carbon emissions dataset is generated. Based on the carbon emission monitoring data, the total carbon emissions of the ship are calculated, and a second carbon emission dataset is generated. Compare the first carbon emission dataset with the second carbon emission dataset, and output the optimal carbon emission result.

[0006] Optionally, the fuel data includes the fuel consumption of each type of fuel and its corresponding fuel carbon emission coefficient; The calculation of the ship's total carbon emissions based on the fuel data includes: The total carbon emissions of the ship are calculated based on the fuel consumption of each type of fuel and its corresponding fuel carbon emission coefficient.

[0007] Optionally, the fuel consumption is obtained through fuel refueling records, including: Based on the fuel refueling records, the initial fuel inventory, the ending fuel inventory, the quantity stated on the supply order, and the amount of fuel transferred out during the period are obtained respectively. The fuel consumption is calculated based on the beginning and ending stock of the fuel, the quantity stated in the supply order, and the amount of fuel discharged during the period.

[0008] Optionally, the fuel consumption is obtained through fuel tank level monitoring data of the ship during navigation, including: Based on the fuel tank level monitoring data of the ship during navigation, the first tank level when the ship leaves the current port of call and the second tank level when the ship arrives at the next adjacent port of call are obtained respectively. Based on the fuel tank level monitoring data of the ship during navigation, the first level difference when the ship is refueling during the voyage and the second level difference when the ship is unloading fuel during the voyage are obtained respectively. The fuel consumption is calculated based on the liquid level in the first chamber, the liquid level in the second chamber, the first liquid level difference, the second liquid level difference, the liquid surface area, and the fuel density.

[0009] Optionally, the fuel consumption is obtained through fuel tank level monitoring data when the ship is at port, including: Based on the fuel tank level monitoring data of the vessel when it is docked, the first tank level when the vessel leaves the current port of call and the third tank level when the vessel arrives at the current port of call are obtained respectively. Based on the fuel tank level monitoring data of the ship when it is docked, the third liquid level difference when the ship is refueling during the docking period and the fourth liquid level difference when the ship is unloading fuel during the docking period are obtained respectively. The fuel consumption is calculated based on the liquid level in the first chamber, the liquid level in the third chamber, the difference between the third and fourth liquid levels, the liquid surface area, and the fuel density.

[0010] Optionally, the fuel consumption is obtained through fuel flow meter monitoring data during the ship's voyage, including: Based on the fuel flow meter monitoring data of the ship during navigation, the first fuel volume measured by the flow meter at each carbon emission source during the ship's voyage is obtained; Based on the first fuel volume and the corresponding fuel density, calculate the fuel consumption at each carbon emission source during the ship's voyage. The fuel consumption is obtained by summing the fuel consumption components at each carbon emission source during the ship's voyage; The carbon emission sources of the ship include at least one of the main engine, auxiliary engine, boiler, gas turbine and inert gas generator.

[0011] Optionally, the fuel consumption is obtained through fuel flow meter monitoring data when the ship is at port, including: The second fuel volume measured by the flow meter at each carbon emission source during the port stay is obtained based on the fuel flow meter monitoring data of the ship when it is docked. Based on the second fuel volume and the corresponding fuel density, calculate the fuel consumption at each carbon emission source during the port closure period; The fuel consumption amount is obtained by summing the fuel consumption components at each carbon emission source during the port closure period; The carbon emission sources of the ship include at least one of the main engine, auxiliary engine, boiler, gas turbine and inert gas generator.

[0012] Optionally, the carbon emission monitoring data is acquired through carbon emission monitoring equipment, which includes a monitoring cabinet and several sensor groups installed in each ship's smoke duct, and the sensor groups are all communicatively connected to the monitoring cabinet. Each of the sensor groups includes a flue gas sampling probe and a flue gas flow meter.

[0013] Optionally, calculating the total carbon emissions of the ship based on the carbon emission monitoring data includes: The instantaneous carbon emission mass flow rate within the corresponding ship exhaust duct is obtained based on each of the aforementioned sensor groups; The cumulative carbon emissions in each ship's smokestack are calculated based on the instantaneous carbon emission mass flow rate in each ship's smokestack. The total carbon emissions of the vessel are obtained by summing the cumulative carbon emissions from all the vessel's exhaust pipes.

[0014] Optionally, comparing the first carbon emission dataset and the second carbon emission dataset to output the optimal carbon emission result includes: Compare the total carbon emissions of the ships in the first carbon emission dataset and the second carbon emission dataset in each reporting period; Select the minimum value of the total carbon emissions as the optimal carbon emission result and output it; The reporting period is either a voyage or a calendar month.

[0015] According to a second aspect of this application, a ship carbon emission accounting device is provided, which applies the ship carbon emission accounting method described above, the ship carbon emission accounting device comprising: The data acquisition module is used to acquire multi-source data of the ship, which includes the ship's fuel data and carbon emission monitoring data; The first calculation module is used to calculate the total carbon emissions of the ship based on the fuel data and generate a first carbon emission dataset. The second calculation module is used to calculate the total carbon emissions of the ship based on the carbon emission monitoring data and generate a second carbon emission dataset. The output module is used to compare the first carbon emission dataset and the second carbon emission dataset and output the optimal carbon emission result.

[0016] According to a third aspect of this application, a ship operation management system is also provided, including the ship carbon emission accounting device described above.

[0017] In the ship carbon emission accounting method of this application embodiment, the total carbon emissions based on ship fuel data and the total carbon emissions based on ship carbon emission monitoring data are calculated in parallel and compared and verified. This allows ship owners to flexibly select the optimal carbon emission data for carbon intensity index rating or carbon tax declaration within a compliance framework, which helps to optimize operating costs. In addition, by automatically aggregating and standardizing the previously scattered data from multiple systems such as fuel, emissions, and navigation, ship owners and managers can clearly understand the total ship carbon emissions based on different accounting methods within a single interface, solving the problems of scattered data sources and difficulties in comparison.

[0018] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0020] Figure 1 This is a flowchart illustrating the ship carbon emission accounting method provided in an exemplary embodiment of this application; Figure 2 This is a schematic diagram of the logical architecture of the ship carbon emission accounting method provided in an exemplary embodiment of this application; Figure 3 This is a schematic diagram of the composition of the carbon emission monitoring device provided in an exemplary embodiment of this application; Figure 4 This is a schematic diagram of a module of a ship carbon emission accounting device provided in an exemplary embodiment of this application.

[0021] Explanation of reference numerals in the attached figures: 1. Monitoring cabinet; 2. Communication line; 3. First ship flue; 4. Second ship flue; 5. nth ship flue; 6. First flue sampling probe; 7. Second flue sampling probe; 8. nth flue sampling probe; 9. First flue gas flow meter; 10. Second flue gas flow meter; 11. nth flue gas flow meter; 101. Data acquisition module; 102. First calculation module; 103. Second calculation module; 104. Output module. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0023] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0024] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0025] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not exclude the applicability to or configuration to devices performing additional tasks or steps. Additionally, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0026] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0027] In existing technologies, ship carbon emission accounting is mainly based on two methods: indirect calculation and direct measurement. However, indirect calculation is affected by factors such as fuel composition and measurement errors, and cannot fully represent actual emissions; direct measurement relies on the accuracy and stability of monitoring equipment. To improve ship management efficiency and optimize compliance decisions, ship operators and managers urgently need a carbon emission accounting method that can uniformly collect, compare, analyze, and output reliable carbon emission data to support emission monitoring, reporting, and compliance decisions. Currently, however, there is a lack of such a carbon emission accounting method that can systematically integrate the two types of data sources and achieve cross-validation and optimized selection.

[0028] In view of this, the embodiments of this application provide a method for calculating ship carbon emissions, which aims to achieve multi-source data collection, cross-calculation and intelligent management of ship carbon emissions, output the optimal carbon emission results, and realize a comprehensive visualization of the carbon emission situation of the entire ship.

[0029] Firstly, the ship carbon emission accounting method provided in this application can be applied to ship carbon emission accounting devices. Please refer to [link / reference]. Figure 1 , Figure 1 This is a flowchart illustrating the ship carbon emission accounting method provided in this application embodiment. The method specifically includes the following steps: S100: Acquire multi-source data from ships, including fuel data and carbon emission monitoring data.

[0030] In some embodiments, fuel data may include the fuel consumption of each type of fuel currently used on the ship and its corresponding fuel carbon emission coefficient, wherein the fuel consumption may be calculated based on the current fuel level or fuel flow meter reading or fuel filling record; carbon emission monitoring data may include CO2 concentration and flue gas flow rate of each ship's exhaust duct, etc.

[0031] Understandably, ship carbon emission accounting devices can automatically collect and uniformly process the aforementioned multi-source ship data from different ship systems through standard interfaces.

[0032] Further, please refer to Figure 2 The ship's carbon emission accounting device simultaneously collects basic ship information, as well as AIS information uploaded by the Automatic Identification System (AIS). The basic ship information includes the ship's name, IMO number (the ship's IMO identification code), port of registration, and owner information; the AIS information includes the ship's position information (latitude and longitude), speed, and route. This information is used to identify and locate ships for monitoring purposes.

[0033] S200: Based on fuel data, calculate the total carbon emissions of the ship and generate the first carbon emissions dataset.

[0034] This step aims to calculate the ship's total carbon emissions using an indirect accounting method. Specifically, the total carbon emissions for the current reporting period can be calculated based on the fuel consumption of each type of fuel used by the ship during the current reporting period. First, the carbon emissions for each type of fuel are calculated based on the fuel consumption and the corresponding fuel carbon emission factor. Then, these emissions are summed to obtain the total carbon emissions for the ship during the current reporting period. Both carbon emissions and fuel consumption are expressed in tons. The fuel carbon emission factor refers to the carbon emission coefficient per unit mass of fuel. The amount of CO2 released by complete combustion The unit is Its calculation method can be expressed as: .

[0035] The reporting period is set as either a voyage or a calendar month.

[0036] Furthermore, this embodiment can obtain the fuel consumption of each type of fuel currently used by the ship in the following ways: Method 1: Fuel consumption is obtained through fuel refueling records, which includes the following steps: S211. Based on the fuel refueling records, obtain the beginning inventory, ending inventory, quantity stated on the fuel supply order (BDN), and the amount of fuel transferred out during the period. S212. Based on the beginning and ending fuel inventories, the quantities stated in the fuel supply orders (BDNs), and the amount of fuel removed during the period, calculate the fuel consumption. The calculation method can be expressed as follows: .

[0037] In this way, the fuel consumption of each type of fuel currently used on the ship can be calculated based on the fuel refueling records.

[0038] Method 2: Fuel consumption is obtained through fuel tank level monitoring data during the ship's voyage, which includes the following steps: S221. Based on the fuel tank level monitoring data of the ship during navigation, the first tank level when the ship leaves the current port of call and the second tank level when the ship arrives at the next adjacent port of call are obtained respectively. S222. Based on the fuel tank level monitoring data of the ship during navigation, obtain the first level difference when the ship is refueling during the voyage and the second level difference when the ship is unloading fuel during the voyage. S223. Calculate fuel consumption based on the liquid level in the first compartment, the liquid level in the second compartment, the first liquid level difference, the second liquid level difference, the liquid surface area, and the fuel density. The unit for liquid level is meters. Fuel density refers to the mass of fuel per unit volume, and the unit is 1. Its calculation method can be expressed as: .

[0039] In this way, the fuel consumption of each type of fuel during navigation can be calculated based on the fuel tank level monitoring data.

[0040] Method 3: Fuel consumption is obtained through fuel tank level monitoring data when the ship is at port, which includes the following steps: S231. Based on the fuel tank level monitoring data of the ship when it is at the port of call, the first tank level when the ship leaves the current port of call and the third tank level when the ship arrives at the current port of call are obtained respectively. S232. Based on the fuel tank level monitoring data of the ship when it is docked, obtain the third level difference when the ship is refueling during the docking period and the fourth level difference when the ship is unloading fuel during the docking period. S233. Based on the liquid level in the first compartment, the liquid level in the third compartment, the difference between the third and fourth liquid levels, the liquid surface area, and the fuel density, calculate the fuel consumption. The calculation method can be expressed as follows: .

[0041] In this way, the fuel consumption of each type of fuel when the ship is at port can be calculated based on the fuel tank level monitoring data.

[0042] Method 4: Fuel consumption is obtained by monitoring data from the ship's fuel flow meter during navigation, which includes the following steps: S241. Based on the fuel flow meter monitoring data of the ship during navigation, obtain the first fuel volume measured by the flow meter at each carbon emission source during the ship's voyage; S242. Based on the first fuel volume and the corresponding fuel density, calculate the fuel consumption at each carbon emission source during the ship's voyage. S243. Summate the fuel consumption components at each carbon emission source during the ship's voyage to obtain the total fuel consumption. The unit for fuel volume is cubic meters. Fuel density refers to the mass of fuel per unit volume, and the unit is 1. Its calculation method can be expressed as: .

[0043] It should be noted that the carbon emission sources of a ship include at least one of the main engine, auxiliary engine, boiler, gas turbine, and inert gas generator.

[0044] In this way, the fuel consumption of each type of fuel during navigation can be calculated based on the fuel flow meter monitoring data.

[0045] Method 5: Fuel consumption is obtained through fuel flow meter monitoring data when the ship is in port, which includes the following steps: S251. Based on the fuel flow meter monitoring data of the ship when it is docked, obtain the second fuel volume measured by the flow meter at each carbon emission source during the docking period; S252. Based on the second fuel volume and the corresponding fuel density, calculate the fuel consumption at each carbon emission source during the port closure period. S253. Summing up the fuel consumption components at each carbon emission source during the port closure period yields the total fuel consumption, which can be expressed as follows: .

[0046] Similarly, carbon emission sources for ships include at least one of the main engine, auxiliary engine, boiler, gas turbine, and inert gas generator.

[0047] In this way, the fuel consumption of each type of fuel when the ship is at port can be calculated based on the fuel flow meter monitoring data.

[0048] Furthermore, the ship carbon emission accounting device has a built-in carbon emission coefficient for the corresponding marine fuel. For example, different types of marine fuel and their corresponding carbon emission coefficients are shown in Table 1 below: Table 1. Marine fuel types and their corresponding carbon emission coefficients

[0049] The ship carbon emission accounting device can automatically match the corresponding carbon emission coefficient based on the input fuel type, calculate the fuel consumption of each type of fuel, and then calculate the carbon emission of each type of fuel. These calculations are then summed to obtain the total carbon emissions of the ship in the current reporting period. Finally, the ship carbon emission accounting device will aggregate the total carbon emissions of the ship in all reporting periods to generate the first carbon emission dataset.

[0050] S300: Based on carbon emission monitoring data, calculate the total carbon emissions of ships and generate a second carbon emission dataset.

[0051] This step aims to calculate the ship's total carbon emissions through direct measurement methods. Specifically, carbon emission monitoring equipment can be used to obtain carbon emission monitoring data for the current reporting period. It should be understood that ships have multiple exhaust ducts, and the carbon emission monitoring data can include CO2 concentration and flue gas flow rate for each duct. The carbon emissions from each exhaust duct can then be calculated, and these emissions are summed to obtain the total carbon emissions for the current reporting period.

[0052] Further, please refer to Figure 3 In some embodiments, the carbon emission monitoring equipment may include a monitoring cabinet 1 and several sensor groups respectively installed in each of the ship's smoke ducts, with each sensor group being communicatively connected to the monitoring cabinet 1 via a communication line 2. Each sensor group includes a smoke duct sampling probe and a flue gas flow meter. It should be understood that the number of sensor groups should be consistent with the number of ship smoke ducts to achieve carbon emission monitoring for each ship smoke duct.

[0053] For example, assuming a ship has n ship flues, where n is an integer greater than or equal to 1, then n sensor groups should be installed, one-to-one in each ship flue. For instance, a first sensor group is installed in the first ship flue 3, containing a first flue sampling probe 6 and a first flue gas flow meter 9; a second sensor group is installed in the second ship flue 4, containing a second flue sampling probe 7 and a second flue gas flow meter 10; and so on, with an nth sensor group installed in the nth ship flue 5, containing an nth flue sampling probe 8 and an nth flue gas flow meter 11, thereby acquiring carbon emission monitoring data for each ship flue.

[0054] It should be understood that the carbon emission monitoring data collected by each sensor group will be transmitted in real time to the monitoring cabinet 1 via communication line 2, and then uploaded by the monitoring cabinet 1 to the ship carbon emission accounting device in real time.

[0055] Furthermore, the carbon emission sources of a ship include at least one of the main engine, auxiliary engine, boiler, gas turbine, and inert gas generator. Therefore, in order to ensure the integrity and accuracy of carbon emission accounting, the sensor group of the carbon emission monitoring equipment must cover all flue gas emission points that generate carbon emissions from all carbon emission sources on the ship, that is, all ship flues, to achieve one monitoring per flue.

[0056] The ship carbon emission accounting device can acquire real-time carbon emission monitoring data for each ship's exhaust duct during the current reporting period based on the aforementioned sensor array, and use this data to calculate the total carbon emissions of the ship during the current reporting period. The calculation process includes the following steps: S301. Obtain the instantaneous carbon emission mass flow rate in the corresponding ship's flue based on each sensor group.

[0057] In some embodiments, the instantaneous carbon emission mass flow rate can be calculated as follows: (1); In formula (1): Indicates instantaneous carbon emission mass flow rate, in units of ; Indicates the first The CO2 volume concentration in each flue, expressed as a percentage, is measured in real time by a gas analyzer in the carbon emission monitoring equipment. Indicates the first The flue gas volumetric flow rate under operating conditions for each flue is measured in real time by a flue gas flow meter, taking parameters such as temperature, pressure, and flow rate of the flue gas. This measurement is then converted into the flue gas volumetric flow rate under standard conditions, with the unit being [unit missing]. ; This represents the density of CO2 under standard conditions, and its unit is 1. .

[0058] S302. Calculate the cumulative carbon emissions in each ship's smoke duct based on the instantaneous carbon emission mass flow rate in each ship's smoke duct.

[0059] In some embodiments, the cumulative carbon emissions per ship exhaust duct (in units of...) The calculation of ) can be expressed as: .

[0060] S303. Sum the cumulative carbon emissions from all ship exhaust pipes to obtain the total carbon emissions of the ship.

[0061] In some embodiments, the total carbon emissions of a ship (in tons) can be obtained by summing the cumulative carbon emissions from all of the ship's exhaust pipes, and the calculation can be expressed as follows: .

[0062] This allows for the calculation of a ship's total carbon emissions for the current reporting period using direct measurement methods. Finally, the ship carbon emission accounting device will aggregate the total carbon emissions of the ship for each reporting period to generate a second carbon emission dataset.

[0063] S400: Compare the first carbon emission dataset and the second carbon emission dataset, and output the optimal carbon emission result.

[0064] Specifically, the ship carbon emission accounting device can display the carbon emission data from the first and second carbon emission datasets side by side in the platform interface in the form of charts and other formats, enabling intuitive comparison.

[0065] The ship carbon emission accounting device automatically selects the minimum total carbon emission value as the optimal carbon emission result and outputs it by comparing the total carbon emissions of ships in the first and second carbon emission datasets for each reporting period. In some optional implementations, the optimal carbon emission result can also be selected and output manually.

[0066] The purpose of ship carbon emission accounting devices is to provide shipowners with flexibility in data selection, allowing them to choose the optimal carbon emission results while meeting regulatory requirements, for use in scenarios such as CII (Carbon Intensity Index) rating and carbon tax declaration. After selecting data, standardized reports that comply with the requirements of IMO (International Maritime Organization) and EU MRV (Monitoring, Reporting and Verification) can be generated with one click, simplifying the declaration process.

[0067] Thus, the ship carbon emission accounting method of this application automatically aggregates and standardizes previously scattered data from multiple systems such as fuel, emissions, and navigation. Ship owners and managers can clearly understand the total ship carbon emissions based on different accounting methods within a single interface, achieving centralized management and panoramic display of the entire ship's carbon emission data, and solving the problems of scattered data sources and difficulties in comparison.

[0068] Meanwhile, by comparing carbon emission data in parallel, shipowners can flexibly select the most favorable carbon emission data for CII rating or carbon tax declaration within the compliance framework, which helps optimize operating costs. Furthermore, the platform automatically generates standard reports, improving the efficiency and accuracy of data reporting and reducing management burden.

[0069] Secondly, a ship carbon emission accounting device applies the ship carbon emission accounting method described above. Please refer to [link / reference]. Figure 4 The ship carbon emission accounting device includes: The data acquisition module 101 is used to acquire multi-source data of the ship, which includes the ship's fuel data and carbon emission monitoring data; The first calculation module 102 is used to calculate the total carbon emissions of the ship based on the fuel data and generate a first carbon emission dataset. The second calculation module 103 is used to calculate the total carbon emissions of the ship based on the carbon emission monitoring data and generate a second carbon emission dataset. Output module 104 is used to compare the first carbon emission dataset and the second carbon emission dataset and output the optimal carbon emission result.

[0070] Thirdly, a ship operation management system is also provided, including the ship carbon emission accounting device described above.

[0071] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0072] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A method for calculating ship carbon emissions, characterized in that, The ship carbon emission accounting method includes: Acquire multi-source data of the ship, which includes the ship's fuel data and carbon emission monitoring data; Based on the fuel data, the total carbon emissions of the ship are calculated, and a first carbon emissions dataset is generated. Based on the carbon emission monitoring data, the total carbon emissions of the ship are calculated, and a second carbon emission dataset is generated. Compare the first carbon emission dataset with the second carbon emission dataset, and output the optimal carbon emission result.

2. The ship carbon emission accounting method according to claim 1, characterized in that, The fuel data includes the fuel consumption of each type of fuel and its corresponding fuel carbon emission coefficient. The calculation of the ship's total carbon emissions based on the fuel data includes: The total carbon emissions of the ship are calculated based on the fuel consumption of each type of fuel and its corresponding fuel carbon emission coefficient.

3. The ship carbon emission accounting method according to claim 2, characterized in that, The fuel consumption is obtained through fuel refueling records, including: Based on the fuel refueling records, the initial fuel inventory, the ending fuel inventory, the quantity stated on the supply order, and the amount of fuel transferred out during the period are obtained respectively. The fuel consumption is calculated based on the beginning and ending stock of the fuel, the quantity stated in the supply order, and the amount of fuel discharged during the period.

4. The ship carbon emission accounting method according to claim 2, characterized in that, The fuel consumption is obtained through fuel tank level monitoring data of the ship during navigation, including: Based on the fuel tank level monitoring data of the ship during navigation, the first tank level when the ship leaves the current port of call and the second tank level when the ship arrives at the next adjacent port of call are obtained respectively. Based on the fuel tank level monitoring data of the ship during navigation, the first level difference when the ship is refueling during the voyage and the second level difference when the ship is unloading fuel during the voyage are obtained respectively. The fuel consumption is calculated based on the liquid level in the first chamber, the liquid level in the second chamber, the first liquid level difference, the second liquid level difference, the liquid surface area, and the fuel density.

5. The ship carbon emission accounting method according to claim 2, characterized in that, The fuel consumption is obtained through fuel tank level monitoring data when the ship is at port, including: Based on the fuel tank level monitoring data of the vessel when it is docked, the first tank level when the vessel leaves the current port of call and the third tank level when the vessel arrives at the current port of call are obtained respectively. Based on the fuel tank level monitoring data of the ship when it is docked, the third liquid level difference when the ship is refueling during the docking period and the fourth liquid level difference when the ship is unloading fuel during the docking period are obtained respectively. The fuel consumption is calculated based on the liquid level in the first chamber, the liquid level in the third chamber, the difference between the third and fourth liquid levels, the liquid surface area, and the fuel density.

6. The ship carbon emission accounting method according to claim 2, characterized in that, The fuel consumption is obtained through data monitored by the ship's fuel flow meter during navigation, including: Based on the fuel flow meter monitoring data of the ship during navigation, the first fuel volume measured by the flow meter at each carbon emission source during the ship's voyage is obtained; Based on the first fuel volume and the corresponding fuel density, calculate the fuel consumption at each carbon emission source during the ship's voyage. The fuel consumption is obtained by summing the fuel consumption components at each carbon emission source during the ship's voyage; The carbon emission sources of the ship include at least one of the main engine, auxiliary engine, boiler, gas turbine and inert gas generator.

7. The ship carbon emission accounting method according to claim 2, characterized in that, The fuel consumption is obtained through data monitored by the fuel flow meter when the ship is at port, including: The second fuel volume measured by the flow meter at each carbon emission source during the port stay is obtained based on the fuel flow meter monitoring data of the ship when it is docked. Based on the second fuel volume and the corresponding fuel density, calculate the fuel consumption at each carbon emission source during the port closure period; The fuel consumption amount is obtained by summing the fuel consumption components at each carbon emission source during the port closure period; The carbon emission sources of the ship include at least one of the main engine, auxiliary engine, boiler, gas turbine and inert gas generator.

8. The ship carbon emission accounting method according to claim 1, characterized in that, The carbon emission monitoring data is acquired through carbon emission monitoring equipment, which includes a monitoring cabinet and several sensor groups installed in each ship's smoke duct. All of the sensor groups are communicatively connected to the monitoring cabinet. Each of the sensor groups includes a flue gas sampling probe and a flue gas flow meter.

9. The ship carbon emission accounting method according to claim 8, characterized in that, The calculation of the ship's total carbon emissions based on the carbon emission monitoring data includes: The instantaneous carbon emission mass flow rate within the corresponding ship exhaust duct is obtained based on each of the aforementioned sensor groups; The cumulative carbon emissions in each ship's smokestack are calculated based on the instantaneous carbon emission mass flow rate in each ship's smokestack. The total carbon emissions of the vessel are obtained by summing the cumulative carbon emissions from all the vessel's exhaust pipes.

10. The ship carbon emission accounting method according to claim 1, characterized in that, The step of comparing the first carbon emission dataset and the second carbon emission dataset to output the optimal carbon emission result includes: Compare the total carbon emissions of the ships in the first carbon emission dataset and the second carbon emission dataset in each reporting period; Select the minimum value of the total carbon emissions as the optimal carbon emission result and output it; The reporting period is either a voyage or a calendar month.

11. A ship carbon emission accounting device, characterized in that, The ship carbon emission accounting device, using the ship carbon emission accounting method as described in any one of claims 1-10, comprises: The data acquisition module is used to acquire multi-source data of the ship, which includes the ship's fuel data and carbon emission monitoring data; The first calculation module is used to calculate the total carbon emissions of the ship based on the fuel data and generate a first carbon emission dataset. The second calculation module is used to calculate the total carbon emissions of the ship based on the carbon emission monitoring data and generate a second carbon emission dataset. The output module is used to compare the first carbon emission dataset and the second carbon emission dataset and output the optimal carbon emission result.

12. A ship operation management system, characterized in that, Includes the ship carbon emission accounting device as described in claim 11.

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