Method for calculating carbon emission and strength of target ship in construction stage

Abstract

The invention discloses a method for calculating carbon emission and strength of a target ship in a building stage, and relates to the crossing field of ship building and environmental protection. According to the method, on the basis of actual resource and energy consumption and process workload of equipment and a production line in a target ship building period, process carbon emission in a target ship factory, in-factory auxiliary production carbon emission allocated to the target ship and target outboard committee carbon emission are calculated step by step, and in-factory COrecycling amount and carbon removal amount allocated to the target ship are deducted; the total carbon emission of the target ship in the building stage is obtained; meanwhile, the construction process carbon emission intensity of the target ship, the construction stage carbon emission intensity and the shipyard ship product average carbon emission index are defined, and a shipyard process level and production management evaluation method is established. The problems that the prior art is based on design estimation, the accounting range is narrow, and the result is not based on actual activity data are solved, accurate accounting of actual carbon emission is achieved, third-party authentication is supported, a green evaluation basis is provided for ship owners, shipyards and the like, and low-carbon transformation of the ship industry is assisted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carbon emission calculation of shipbuilding process, and particularly relates to a method for calculating carbon emission and intensity of target ship in shipbuilding stage. BACKGROUND

[0002] With the acceleration of global economic integration process, the scale of international trade continues to expand, and as the core tool for carrying more than 70% of global cargo transportation, the number and scale of shipbuilding are increasing year by year. According to the statistics of the International Maritime Organization (IMO), the global new ship order volume in 2024 broke through 120 million deadweight tons, increasing by nearly 60% compared with 2020, and the shipbuilding industry has become an important part of global manufacturing. However, the shipbuilding process has the characteristics of complex process, long industrial chain, and intensive energy consumption. From raw material procurement (such as steel, pipe, equipment and parts) to processing and manufacturing (such as steel pretreatment, cutting, welding), to total assembly, mooring test and trial, a large amount of greenhouse gas (mainly CO2) will be emitted in each link, which has become an important source of carbon emissions in the manufacturing industry. According to estimates, the carbon emissions of a single 100,000-ton bulk carrier during the construction stage can reach several thousand tons of CO2 equivalent, and the construction of large LNG ships and container ships has broken through the ten-thousand-ton level. Therefore, accurately accounting for the carbon footprint of the shipbuilding stage is of great significance for shipbuilding enterprises to realize low-carbon transformation and respond to the challenges of global climate change.

[0003] The current shipbuilding industry faces multiple challenges in carbon emission accounting. First, the complexity of shipbuilding process makes it difficult to collect energy consumption data. Shipbuilding is not a single process, but consists of dozens of interrelated process links. For example, ship structure construction needs to go through pretreatment, cutting, small assembly, medium assembly, large assembly, and total assembly. At the same time, pipe processing, machining, and equipment installation need to be carried out simultaneously. Finally, the performance of the ship needs to be verified through mooring test and trial. In actual production, cross-operation is very common. A cutting device may be used to process steel for 2-3 different ship types at the same time, and a painting workshop may alternate between painting sections for multiple ships. This multi-ship shared equipment / production line operation mode makes it difficult to accurately define the energy consumption allocation of a single ship. At the same time, there are many types of materials needed for shipbuilding, including more than ten types of steel, and the number of parts is in the tens of thousands. The material requisition presents the characteristics of "scattered and multiple batches", and there is a lack of systematic requisition record and energy consumption correlation mechanism, making it difficult to trace the resource and energy consumption data of some process links such as pipe processing and machining, further increasing the difficulty of carbon emission accounting.

[0004] Secondly, the carbon emission accounting standard system and database construction of the shipbuilding industry are lagging behind, which restricts the accuracy of the accounting. Compared with mature industries such as automobiles and machinery manufacturing, the shipbuilding industry has not yet formed a global unified carbon emission accounting standard for the construction phase. Different shipyards often develop accounting methods based on their own experience, resulting in a lack of comparability of the data. For example, some shipyards only account for the carbon emissions of major processes such as welding and painting, ignoring the emissions of auxiliary processes such as pretreatment and pipe processing, as well as the emissions of auxiliary production systems such as in-plant transportation and air compression stations. In addition, some shipyards do not include outsourcing operations (such as pipe system surface treatment and outfitting piece processing) in the accounting scope, while the carbon emissions of outsourcing operations account for 5%-15% of the total emissions, directly leading to an underestimation of the accounting results. Furthermore, the shipbuilding industry lacks mature energy consumption-carbon emission databases, and most shipyards can only record energy consumption (such as electricity consumption and diesel consumption), making it impossible to obtain accurate carbon emission factors for different equipment and different processes. Therefore, the industry average factor must be used for estimation, further amplifying the accounting error.

[0005] In the field of shipbuilding carbon footprint calculation technology, the existing technology still has obvious limitations. Two previously granted invention patents (Patent No. ZL202311439069.X, entitled "Single-ship construction carbon footprint accounting method, system and electronic device"; Patent No. ZL202410125682.2, entitled "Single-ship full life cycle carbon footprint calculation model and service platform") both estimate and account based on process design BOM tables (bill of materials) and unit process carbon emissions. This method is essentially a "design-side prediction method", which calculates the carbon footprint estimate by multiplying the material usage and process planning in the ship design phase with the preset unit process carbon emission factor. However, in the actual construction process, various factors can cause deviations between actual carbon emissions and estimated results: for example, fluctuations in equipment operating efficiency (such as 10%-20% higher energy consumption for old cutting equipment), differences in worker operation habits (such as 5%-8% higher welding material utilization rate for experienced welders), and deviations between actual material usage and design quantity (such as 2%-3% higher steel cutting loss rate than the design value). These deviations can accumulate to make the actual carbon emissions differ from the estimated results by 15%-25%, which cannot meet the data quality requirements of third-party certification of ship product carbon footprint (such as IMO ship energy efficiency design index EEDI and EU carbon emissions trading system ETS).

[0006] In addition, the prior art lacks an evaluation mechanism for carbon emission intensity indicators and shipyard process and production management level. When selecting a ship product or cooperating with a shipyard, the ship owner, cargo owner and investor need to measure the green level of the ship through specific indicators (such as carbon emission per unit deadweight ton), but the prior art can only provide total carbon emission and cannot compare the green level of different deadweight ton ships horizontally; at the same time, the shipyard also lacks a scientific evaluation method to identify the weak links of its own process and management, making it difficult to carry out energy-saving reconstruction targetedly. For example, a shipyard may know that the total carbon emission is high, but it cannot determine whether the cutting process energy consumption is too high or the rework rate in production management is too high, resulting in blind emission reduction measures and poor effect.

[0007] In summary, the current shipbuilding stage carbon emission accounting is facing problems such as "difficult data collection, narrow accounting range, lack of evaluation mechanism", and the existing technical scheme based on design estimation cannot meet the needs of the industry for actual carbon emission accounting and green evaluation. Developing a target ship building stage carbon emission calculation and evaluation method based on actual equipment energy consumption and process operation quantity, covering all process emission sources, supporting accurate accounting and scientific evaluation, has become an urgent need for the shipbuilding industry to realize low-carbon transformation and cope with global environmental policy pressure, and has important practical significance for promoting the green and sustainable development of the shipping industry. SUMMARY

[0008] The present application aims to overcome at least one of the above-mentioned deficiencies of the prior art, and provides a target ship building stage carbon emission calculation method; to achieve the purpose of accurate accounting and scientific evaluation of target ship building stage carbon emission calculation and evaluation method.

[0009] Specifically, the present application provides a target ship building stage carbon emission calculation method, comprising the following steps: S1: calculating the carbon emission of the target ship building stage, the carbon emission of the target ship's in-plant process, the carbon emission of the target ship's auxiliary production facilities, the carbon emission of the target ship's outsourcing, the CO2 recovery amount of the target ship's in-plant, and the carbon removal amount of the target ship's in-plant; S2: according to the calculation results in step S1, the target ship building stage carbon emission is calculated according to formula one: Formula one:

[0010] In the formula: is the carbon emission of the target ship building stage, with the unit of ton CO2 equivalent (tCO2eq); is the carbon emission of the target ship building stage, with the unit of ton CO2 equivalent (tCO2eq); Carbon emission of pre-treatment for target ship construction phase, unit: tCO2eq; Carbon emission of cutting for target ship construction phase, unit: tCO2eq; Carbon emission of CO2 recovery for target ship construction phase, unit: tCO2eq; Carbon emission of CO2 removal for target ship construction phase, unit: tCO2eq.

[0011] In the step S1, the target ship in-plant process carbon emission amount calculation method is calculated according to formula two; formula two: ； In the formula: Carbon emission of pre-treatment for target ship construction phase, unit: tCO2eq; Carbon emission of cutting for target ship construction phase, unit: tCO2eq; Carbon emission of cutting for target ship construction phase, unit: tCO2eq; Carbon emission of cutting for target ship construction phase, unit: tCO2eq; Carbon emission of cutting for target ship construction phase, unit: tCO2eq; Carbon emission of cutting for target ship construction phase, unit: tCO2eq; Carbon emission of cutting for target ship construction phase, unit: tCO2eq; Carbon emission of cutting for target ship construction phase, unit: tCO2eq; Carbon emission of cutting for target ship construction phase, unit: tCO2eq; Carbon emission of cutting for target ship construction phase, unit: tCO2eq; Carbon emission of cutting for target ship construction phase, unit: tCO2eq; Carbon emissions generated by other processes or links in the target ship construction stage, including tightness test, pressure test, cargo containment system installation, roll-on / roll-off system installation, etc., in tCO2eq.

[0012] Further, the carbon emissions generated by the target ship construction stage preprocessing are calculated by Formula Three; Formula Three: ; In the formula: i: the i-th device for preprocessing operation in the target ship construction period, including a steel plate leveling machine, a preprocessing line, and a preprocessing line RTO; s 预处理i : the amount of work of the i-th preprocessing device on the target ship in the target ship construction period, expressed in preprocessing area, in square meters; S 预处理i : the amount of work of the i-th preprocessing device on all ships under construction in the target ship construction period, expressed in preprocessing area, in square meters, etc. AD 预处理j : the j-th resource or energy consumed by the i-th preprocessing device in the target ship construction period, in tons, ten kilowatt-hours, or ten cubic meters, etc. EF 预处理j : the carbon emission factor of the j-th resource or energy, in tons of carbon dioxide per ton, tons of carbon dioxide per ten kilowatt-hours, or tons of carbon dioxide per ten cubic meters, etc. r i预处理 is the redundancy coefficient of the i-th preprocessing device, which is estimated by the shipyard according to the preprocessing requirements of the target ship and the rework rate, and the value of r ranges from 0.8 to 1.5.

[0013] Further, the carbon emissions generated by the target ship construction stage cutting are calculated by Formula Four; Formula Four: ; In the formula: i: the i-th related device for cutting operation in the target ship construction period, including a flame cutting machine, a plasma cutting machine, and a laser cutting machine; s 切割i : the amount of work of the i-th cutting device on the target ship in the target ship construction period, expressed in cutting cross-sectional area, in square meters; S 切割i : the amount of work of the i-th cutting device on all ships under construction in the target ship construction period, expressed in cutting cross-sectional area, in square meters 2 ; AD 切割j : the j-th resource or energy consumed by the i-th cutting device in the target ship construction period, in tons, ten kilowatt-hours, or ten cubic meters, etc. EF 切割j : Carbon emission factor of the jth resource or energy, in ton of carbon dioxide per ton, ton of carbon dioxide per 10,000 kilowatt hours, or ton of carbon dioxide per 10,000 cubic meters, etc. r i切割 : Redundancy coefficient of the ith cutting equipment, estimated by the shipyard according to the cutting requirements of the target ship and the rework rate, and the value of r ranges from 0.8 to 1.5.

[0014] Further, the carbon emissions generated by the sub-assembly group assembly in the target ship construction stage are calculated using Formula Five; Formula Five: ; In the formula: i: The ith equipment performing sub-assembly operations in the target ship construction period, including bridge cranes, semi-gantry cranes, manual welding machines, carbon dioxide welding machines, automatic submerged arc welding machines, submerged arc welding machines, part assembly lines, T-shaped automatic welding production lines, and silicon carbide carbon arc gas planers; s 小组立i : The operation amount of the ith sub-assembly equipment on the target ship in the target ship construction period; for welding equipment, the operation amount is represented by the welding material consumption, with the unit being kilograms; for other types of equipment, the operation amount is represented by the weight of the sub-assembly, with the unit being kilograms; S 小组立i : The operation amount of the ith sub-assembly equipment on all ships under construction in the target ship manufacturing period; for welding equipment, the operation amount is represented by the welding material usage, with the unit being kilograms; for other types of equipment, the operation amount is represented by the weight of the sub-assembly, with the unit being kilograms; AD 小组立j : The jth resource / energy consumed by the ith sub-assembly operation equipment in the target ship manufacturing period, with the unit being tons, 10,000 kilowatt hours, or 10,000 cubic meters, etc. EF 小组立j : Carbon emission factor of the jth resource / energy, in ton of carbon dioxide per ton, ton of carbon dioxide per 10,000 kilowatt hours, or ton of carbon dioxide per 10,000 cubic meters, etc. r i焊接 : Redundancy coefficient of the ith welding equipment, estimated by the shipyard according to the sub-assembly process requirements of the target ship and the rework rate, and the value of r ranges from 0.8 to 1.5.

[0015] Further, the carbon emissions generated by the sub-assembly group assembly in the target ship construction stage are calculated using Formula Five; Formula Five: ; In the formula: i: the ith equipment for intermediate assembly and large assembly in the target shipbuilding period, including bridge crane, semi-gantry crane, manual welding machine, carbon dioxide welding machine, automatic submerged arc welding machine, submerged arc welding machine, flat assembly line, ABCD assembly line, electromagnetic bridge crane, gantry crane, flux drying machine, axial flow fan; s 中组立大组立i : the operation amount of the ith intermediate assembly and large assembly equipment for the target ship in the target shipbuilding period; for welding equipment operation, expressed in consumable consumption, unit: kg; for other equipment operation, expressed in section weight, unit: kg; S 中组立大组立i : the operation amount of the ith intermediate assembly and large assembly equipment for all ships under construction in the target shipbuilding period; for welding equipment operation, expressed in welding material consumption, unit: kg; for other equipment operation, expressed in section weight, unit: kg; AD 中组立大组立 j: the jth resource or energy consumed by the ith intermediate assembly and large assembly equipment in the target shipbuilding period, unit: ton, ten kilowatt-hour, ten cubic meters, etc. EF 中组立大组立j : the carbon emission factor of the jth resource / energy, unit: ton of carbon dioxide per ton, ton of carbon dioxide per ten kilowatt-hour, or ton of carbon dioxide per ten cubic meters, etc. r i中组立大组立 r is the redundancy coefficient of the ith intermediate assembly and large assembly equipment, which is estimated by the shipyard according to the intermediate assembly and large assembly requirements of the target ship and the rework rate, and r value ranges from 0.8 to 1.5.

[0016] Further, the carbon emissions generated by the target ship construction stage painting are calculated using formula seven; formula seven: ; In the formula: i: the ith equipment for painting operation in the target shipbuilding period, including dehumidifier, sandblasting system, combined sanding machine, paint spraying machine, dust collector, recycling cleaning conveying system, sandblasting vacuum sand suction system, mobile vacuum cleaner, mobile vacuum sand suction machine, VOCs treatment device; s 涂装i : the operation amount of the ith painting operation equipment for the target ship in the target shipbuilding period; for sanding-related equipment operation, expressed in sanding area, unit: square meter; for spraying-related equipment operation, expressed in spraying area, unit: square meter, etc. S 涂装i : the operation amount of the ith painting equipment for all ships under construction in the target shipbuilding period; for sanding-related equipment operation, expressed in sanding area, unit: square meter; for spraying-related equipment operation, expressed in spraying area, unit: square meter, etc. AD喷涂j : the jth resource or energy consumed by the ith coating equipment in the target ship manufacturing period, in ton, ten kilowatt-hour or ten cubic meter; EF 喷涂j : the carbon emission factor of the jth resource or energy, in ton of carbon dioxide per ton, ten kilowatt-hour or ten cubic meter; r i喷涂 : the redundancy coefficient of the ith coating equipment, which is estimated by the shipyard according to the coating requirements of the target ship and the rework rate, and the value of r ranges from 0.8 to 1.5.

[0017] Further, the carbon emission amount generated in the pipe machining of the target ship construction stage is calculated by Formula Eight; Formula Eight: ; In the formula: i: the ith equipment for pipe machining in the target ship construction period, including cutting machine and welding machine; s 管加工i : the work amount of the ith pipe machining equipment for the target ship in the target ship construction period, expressed by the weight of machined parts, in kilogram; S 管加工i : the work amount of the ith pipe machining equipment for all vessels under construction in the target ship manufacturing period, expressed by the weight of machined parts, in kilogram; AD 管加工j : the jth resource or energy consumed by the ith pipe machining equipment in the target ship manufacturing period, in ton, ten kilowatt-hour or ten cubic meter, etc. EF 管加工j : the carbon emission factor of the jth resource or energy, in ton of carbon dioxide per ton, ten kilowatt-hour or ten cubic meter, etc. r i管加工 : the redundancy coefficient of the ith pipe machining equipment, which is estimated by the shipyard according to the pipe machining requirements of the target ship and the rework rate, and the value of r ranges from 0.8 to 1.5.

[0018] Further, the carbon emission amount generated in the pipe machining of the target ship construction stage is calculated by Formula Eight; Formula Eight: ; In the formula: i: the ith equipment for pipe machining in the target ship construction period, including cutting machine and welding machine; s 机加工i : the work amount of the ith pipe machining equipment for the target ship in the target ship construction period, expressed by the weight of machined parts, in kilogram; S 机加工i: The operation amount of the i-th machining equipment on all the ships under construction in the target ship manufacturing period, expressed by the weight of the processed parts, with the unit of kilogram; AD 机加工j : The j-th resource or energy consumed by the i-th machining equipment in the target ship manufacturing period, with the unit of ton, ten kilowatt-hour, or ten cubic meters, etc. EF 机加工j : The carbon emission factor of the j-th resource or energy, with the unit of ton of carbon dioxide per ton, ton of carbon dioxide per ten kilowatt-hour, or ton of carbon dioxide per ten cubic meters, etc. r i机加工 The redundancy coefficient of the i-th machining equipment, which is estimated by the shipyard according to the machining requirements of the target ship and the rework rate, and the value of r ranges from 0.8 to 1.5.

[0019] Further, the carbon emission amount generated by the outfitting stage of the target ship is calculated by Formula Ten; Formula Ten: ; In the formula: i: The i-th equipment for outfitting operation in the target ship construction period, including cutting machines, welding machines, and cranes; s 舾装i : The operation amount of the i-th outfitting operation equipment on the target ship in the target ship construction period, expressed by the weight of the processed parts, with the unit of kilogram (kg); S 舾装i : The operation amount of the i-th outfitting equipment on all the ships under construction in the target ship manufacturing period, expressed by the weight of the processed parts, with the unit of kilogram; AD 舾装j : The j-th resource or energy consumed by the i-th outfitting equipment in the target ship manufacturing period, with the unit of ton, ten kilowatt-hour, or ten cubic meters, etc. EF 舾装j : The carbon emission factor of the j-th resource or energy, with the unit of ton of carbon dioxide per ton, ton of carbon dioxide per ten kilowatt-hour, or ton of carbon dioxide per ten cubic meters, etc. r i舾装 The redundancy coefficient of the i-th outfitting operation equipment, which is estimated by the shipyard according to the outfitting requirements of the target ship and the rework rate, and the value of r ranges from 0.8 to 1.5.

[0020] Further, the carbon emission amount generated by the total assembly stage of the target ship is calculated by Formula Eleven; Formula Eleven: ; In the formula: i: The i-th equipment for total assembly operation in the target ship construction period, including cutting machines, welding machines, and cranes; s 总组搭载i: The work amount of the i-th general assembly and outfitting equipment on the target ship in the construction period of the target ship; for the work amount of welding equipment, it is expressed by welding material consumption, with the unit of kilogram; for the work amount of equipment such as a crane, it is expressed by the weight of the general assembly and outfitting piece, with the unit of kilogram; S 总组搭载i : The work amount of the i-th general assembly and outfitting equipment on all ships under construction in the manufacturing period of the target ship; for the work amount of welding equipment, it is expressed by welding material consumption, with the unit of kilogram; for the work amount of equipment such as a crane, it is expressed by the weight of the general assembly and outfitting piece, with the unit of kilogram; AD 总组搭载j : The j-th resource or energy consumed by the i-th general assembly and outfitting work equipment in the manufacturing period of the target ship, with the unit of ton, ten kilowatt-hour or ten cubic meter, etc. EF 总组搭载j : The carbon emission factor of the j-th resource or energy, with the unit of ton of carbon dioxide per ton, ton of carbon dioxide per ten kilowatt-hour or ton of carbon dioxide per ten cubic meter, etc. r i总组搭载 is the redundancy coefficient of the i-th general assembly and outfitting equipment, which is estimated by the shipyard according to the general assembly and outfitting requirements of the target ship and the rework rate, and the value of r ranges from 0.8 to 1.5.

[0021] Further, the carbon emission amount generated by the mooring test in the manufacturing stage of the target ship is calculated by formula twelve; formula twelve: ; In the formula, AD 系泊i : The consumption amount of the i-th resource or energy consumed by the mooring test of the target ship, with the unit of ton, ten kilowatt-hour or ten cubic meter, etc. EF 系泊i : The carbon emission factor of the i-th resource or energy, with the unit of ton of carbon dioxide per ton, ton of carbon dioxide per ten kilowatt-hour or ton of carbon dioxide per ten cubic meter, etc.

[0022] Further, the carbon emission amount generated by the sea trial in the manufacturing stage of the target ship is calculated by formula thirteen; formula thirteen:

[0023] In the formula, i: The i-th energy resource consumed by the sea trial of the target ship, including diesel oil, fuel oil, liquefied natural gas, methanol, etc. AD 试航i : The consumption amount of the i-th energy resource, with the unit of ton or ten kilowatt-hour, etc. EF 试航i : The carbon emission factor of the i-th energy resource, with the unit of ton of carbon dioxide per ton or ton of carbon dioxide per ten kilowatt-hour, etc.

[0024] Further, in the step S1, the carbon emission amount of the target ship building stage generated by the auxiliary production facility in the shipyard is calculated by using formula fourteen. ; The CO2 recycling amount of the target ship building stage allocated to the target ship is calculated by using formula fifteen. ; The carbon removal amount of the target ship building stage allocated to the target ship is calculated by using formula sixteen. ; In the formula, H 目标船 : the steel consumption of the target ship building period, in tons; H 全厂 : the steel consumption of all ship products in the shipyard during the target ship building period, in tons; E 辅助生产 : the carbon emission amount generated by the auxiliary production system of the shipyard during the target ship manufacturing process, in tons of carbon dioxide; E 回收 : the carbon emission amount of the carbon dioxide generated by the emission source of the shipyard during the target ship manufacturing period, which is captured, treated and reused in the manufacturing process, in tons of carbon dioxide; E 清除 : the carbon removal amount within the boundary of the shipyard during the target ship manufacturing period, in tons of carbon dioxide.

[0025] The application further provides a calculation method of the process carbon emission intensity in the target ship building yard, which is calculated by using formula seventeen. ; C 厂内工艺 : the process carbon emission intensity of the target ship building stage in the shipyard, in tons of carbon dioxide / ton, which is the carbon emission intensity of one process or the cumulative carbon emission intensity of multiple processes; E 厂内工艺 : the process carbon emission amount of the target ship building process in the shipyard, in tons of carbon dioxide, which is the carbon emission amount of one process or the cumulative carbon emission amount of multiple processes; D 目标船 : the deadweight ton of the target ship, in tons, which is obtained from the ship specification parameters.

[0026] Further, the application further provides a calculation method of the carbon emission intensity of the target ship building stage, which is calculated by using formula eighteen.

[0027] In the formula, C 目标船 : Carbon intensity of target ship in shipbuilding stage, unit: ton CO2 / ton; E 目标船-建造 : Carbon emission of target ship in shipbuilding stage, unit: ton CO2; D 目标船 : Deadweight ton of target ship, unit: ton, obtained from ship specification parameters.

[0028] The application also provides a method for calculating average carbon emission and carbon intensity of shipyard ship products, which comprises the following steps: calculating the average carbon emission of shipyard ship products in a statistical period by formula 19: E = å (Ei / Di) / n (19) ; In the formula: E 船舶产品-AVE : Average carbon intensity of shipyard ship products in a statistical period, unit: ton CO2 / ton; E i-建造 : Carbon emission of the i-th ship product in the shipbuilding stage, unit: ton CO2 (tCO2eq); n: Number of ship products built in the statistical period; calculating the average carbon intensity of shipyard ship products in the statistical period by formula 20: C = å (Ei / Di) / n (20) ; In the formula: C 船舶产品-AVE : Average carbon intensity of shipyard ship products in a statistical period, unit: ton CO2 / ton; E i-建造 : Carbon emission of the i-th ship product in the shipbuilding stage, unit: ton CO2; D i : Deadweight ton of the i-th ship product built in the statistical period.

[0029] Compared with the prior art, the application has the following beneficial effects: 1) For the processes that do not have cross operations with other ship products (including but not limited to tightness test, pressure test, roll-on / roll-off system installation, cargo containment system installation, mooring test, trial voyage, etc.), the resource and energy consumption statistics and carbon emission calculation are performed on a single ship product (target ship); for the processes that have cross operations with other ship products (including but not limited to pretreatment, cutting, pipe processing, machining, small assembly, middle assembly, large assembly, section painting, outfitting, general assembly loading, etc.), the resource and energy consumption and carbon emission calculation of the target ship are performed according to the process characteristics to determine the allocation method, which is close to the actual process and can reduce the influence of ship type difference on the calculation results of energy resource consumption and carbon emission.

[0030] 2) Consider the carbon emissions of auxiliary production facilities (including but not limited to in-plant transportation, air compression station, lighting, office, laboratory, sewage treatment, waste treatment, etc.), outsourcing carbon emissions, carbon removal, and more comprehensive emission inventory identification for ship product construction phase.

[0031] 3) The present technology does not need to analyze and process million-level digital production design BOM data, reducing the workload; and the process quantity of the present technology is obtained based on production plans, production records, process settlement bills, etc., and the energy and resource consumption is obtained based on purchase orders, warehouse entry and exit records, etc. Activity data is easy to obtain and is primary data, which guarantees data quality and reliability. The calculation result is not a predicted result, which can be used for third-party authentication.

[0032] 4) Solve the problem of "non-quantitative index of ship green degree": the existing technology provides estimated single-ship construction carbon emissions and carbon emissions per unit of output / ton of steel / corrected gross tonnage, which cannot be compared horizontally with the green level of different deadweight tonnage ships that have been completed. The strength index of the present invention can realize the horizontal comparison of the completed ships; at the same time, the present invention proposes the target ship construction phase carbon emissions and emission intensity, the target ship process carbon emissions and emission intensity, the shipyard ship product average carbon emissions and emission intensity index and calculation method, which provides a reference for shipowners, cargo owners, investors, shipyards, etc. to measure the green degree of ship products, and provides a reference for shipyards to obtain green financing, green credit, etc.

[0033] 5) The present invention supports process-level green optimization: the target ship-process can focus on the intensity level of specific processes, for example, the target ship-process of the target ship welding process = 0.03 tCO2eq / t, and the industry advanced level is 0.02 tCO2eq / t, which indicates that there is optimization space for the welding process. By introducing an automatic submerged arc welding machine (high efficiency, low energy consumption), the target ship-process can be reduced to 0.025 tCO2eq / t, improving the green degree of the process. Therefore, the shipyard process level and production management evaluation index and method proposed by the present invention provide a reference for green shipyard construction and evaluation. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 The present invention evaluates the carbon footprint of the target ship construction phase. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application are described in more detail with reference to the drawings in the embodiments of the present application. The same or similar reference numerals in the drawings represent the same or similar elements or elements having the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, rather than all the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application. The embodiments of the present application are described in detail below with reference to the drawings.

[0036] In the present application, the terms are defined as follows: (1) Construction phase: refers to the work performed by the shipbuilding enterprise after signing the shipbuilding contract with the ship owner, including processing, subassembly, general assembly, launching, outfitting, and test delivery, etc. It includes in-plant transportation during construction.

[0037] (2) In-plant process carbon emission: refers to the carbon emission generated by the in-plant process during the shipbuilding phase. The processes in the present application include but are not limited to common processes such as pretreatment, cutting, welding, subassembly, intermediate assembly, large assembly, subassembly painting, pipe processing, machining, outfitting, general assembly, mooring test, sea trial, and other special processes such as tightness test, pressure test, cargo containment system installation, and roll-on / roll-off system installation, etc.

[0038] (3) In-plant auxiliary production carbon emission: refers to the carbon emission generated by the in-plant auxiliary production system during the shipbuilding phase. The auxiliary production in the present application includes but is not limited to in-plant transportation, air compression station, lighting, office, experiment, sewage treatment, waste treatment, etc.

[0039] (4) Outsourcing carbon emission: refers to the carbon emission generated by outsourcing during the shipbuilding phase. The outsourcing in the present application includes but is not limited to pipe system surface treatment, outfitting processing, etc.

[0040] (5) In-plant CO2 recycling: refers to the amount of in-plant CO2 recycling during the shipbuilding phase.

[0041] (6) In-plant carbon removal: refers to the amount of in-plant carbon removal during the shipbuilding phase.

[0042] Embodiments I. Calculation method of carbon emission during the construction phase of the target ship

[0043] The carbon emission during the construction phase of the target ship is calculated according to Formula One.

[0044] ; In the formula: Carbon emissions for the target ship construction phase in tonnes of CO2 equivalent (tCO2eq); Carbon emissions for the target ship construction phase, generated by in-house processes of the target ship, in tCO2eq; Carbon emissions for the target ship construction phase, generated by in-house auxiliary production facilities allocated to the target ship, in tCO2eq; Carbon emissions for the target ship construction phase, generated by outsourcing of the target ship, in tCO2eq; Carbon emissions for the target ship construction phase, generated by in-house CO2 recycling allocated to the target ship, in tCO2eq; Carbon emissions for the target ship construction phase, generated by in-house carbon removal allocated to the target ship, in tCO2eq.

[0045] 1. In-house process carbon emissions calculation for the target ship

[0046] The in-house process carbon emissions for the target ship are calculated according to the following equation two.

[0047]

[0048] In which: Carbon emissions for the target ship construction phase, generated by pre-treatment, in tCO2eq; Carbon emissions for the target ship construction phase, generated by cutting, in tCO2eq; Carbon emissions for the target ship construction phase, generated by small group assembly of the target ship, in tCO2eq; Carbon emissions for the target ship construction phase, generated by medium assembly of the target ship, in tCO2eq; Carbon emissions for the target ship construction phase, generated by painting, in tCO2eq; Carbon emissions for the target ship construction phase, generated by pipe machining, in tCO2eq; Carbon emissions for the target ship construction phase, generated by machining, in tCO2eq; Carbon emissions for the target ship construction phase, generated by outfitting, in tCO2eq; Carbon emissions for the target ship construction phase, generated by total assembly and loading, in tCO2eq; Carbon emission for target ship construction phase mooring test, unit: tCO2eq; Carbon emission for target ship construction phase other processes or links (including but not limited to tightness test, pressure test, cargo containment system installation, roll-on / roll-off system installation, etc.), unit: tCO2eq.

[0049] Wherein the calculation method of each process carbon emission

[0050] According to the process operation amount of each equipment / production line of the ship total assembly enterprise to the target ship, the process operation amount to all in-construction ship products, and the resource and energy consumption amount of each equipment during the construction period of the target ship, the resource consumption amount of each process link of the target ship is obtained by determining the distribution method according to the process characteristics, and is calculated according to the following description.

[0051] 1.1, Pretreatment carbon emission

[0052] The pretreatment carbon emission is calculated by formula three, ; In the formula, i: the i-th equipment for pretreatment operation during the construction period of the target ship, including but not limited to a steel plate leveling machine, a pretreatment line, a pretreatment line RTO, etc.; si: the operation amount of the i-th pretreatment equipment to the target ship during the construction period of the target ship, for example, expressed by pretreatment area, unit: square meter (m 2 ); Si: the operation amount of the i-th pretreatment equipment to all in-construction ship products during the construction period of the target ship, for example, expressed by pretreatment area, unit: m 2 ; AD 预处理j : the j-th resource or energy consumed by the i-th pretreatment equipment during the construction period of the target ship, unit: ton (t), ten thousand kilowatt hours (10 4 kWh) or ten thousand cubic meters (10 4 m 3 ); EF 预处理j : the carbon emission factor of the j-th resource or energy, unit: ton of carbon dioxide per ton (tCO2 / t), ton of carbon dioxide per ten thousand kilowatt hours (tCO2 / 10 4 kWh) or ton of carbon dioxide per ten thousand cubic meters (tCO2 / 10 4 m 3 );

[0053] r i预处理Redundancy factor of the i-th pre-treatment equipment, estimated by shipyard according to pre-treatment requirements of target ship and rework rate (e.g. <1 for lower than other ship types, >1 for higher than other ship types), recommended from 0.8 to 1.5.

[0054] 1.2, Cutting carbon emissions

[0055] Cutting carbon emissions is calculated by Equation Four, ; In the equation, i: the i-th related equipment for cutting operation in the construction period of the target ship, including but not limited to flame cutting machine, plasma cutting machine, laser cutting machine, etc. si: the i-th cutting equipment operation amount for the target ship in the construction period of the target ship, for example, expressed in cutting cross-sectional area (cutting length x cutting thickness), unit in square meters (m 2 ); Si: the i-th cutting equipment operation amount for all ships under construction in the construction period of the target ship, for example, expressed in cutting cross-sectional area, unit in m 2 ; AD 切割j : the j-th resource or energy consumed by the i-th cutting equipment in the construction period of the target ship, unit in tons (t), ten thousand kilowatt-hours (10 4 kWh) or ten thousand cubic meters (10 4 m 3 ) etc. EF 切割j : carbon emission factor of the j-th resource or energy, unit in tons of carbon dioxide per ton (tCO2 / t), tons of carbon dioxide per ten thousand kilowatt-hours (tCO2 / 10 4 kWh) or tons of carbon dioxide per ten thousand cubic meters (tCO2 / 10 4 m 3 ) etc.

[0056] r i切割 Redundancy factor of the i-th cutting equipment, estimated by shipyard according to cutting requirements of target ship and rework rate (e.g. <1 for lower than other ship types, >1 for higher than other ship types), recommended from 0.8 to 1.5.

[0057] 1.3, Sectional assembly carbon emissions

[0058] Sectional assembly carbon emissions is calculated by Equation Five, ; In the equation, i: the ith equipment for sub-assembly operation in the construction period of the target ship, including but not limited to bridge crane, semi-gantry crane, manual welding machine, carbon dioxide welding machine, automatic submerged arc welding machine, submerged arc welding machine, component assembly line, T-shaped automatic welding production line, silicon carbide carbon arc gas planer, etc. si: the operation amount of the ith sub-assembly equipment for the target ship in the construction period of the target ship. For welding equipment operation amount, for example, expressed by welding material consumption, unit is kilogram (kg); for other equipment operation amount, for example, expressed by sub-assembly section weight, unit is kilogram (kg); Si: the operation amount of the ith sub-assembly equipment for all ships under construction in the construction period of the target ship. For welding equipment operation amount, for example, expressed by welding material consumption, unit is kilogram; for other equipment operation amount, for example, expressed by section weight, unit is kilogram; AD 小组立j : the jth resource or energy consumed by the ith sub-assembly operation equipment in the construction period of the target ship, unit is ton (t), ten thousand kilowatt hours (10 4 kWh) or ten thousand cubic meters (10 4 m 3 ) etc.; EF 小组立j : the carbon emission factor of the jth resource or energy, unit is ton of carbon dioxide per ton (tCO2 / t), ton of carbon dioxide per ten thousand kilowatt hours (tCO2 / 10 4 kWh) or ton of carbon dioxide per ten thousand cubic meters (tCO2 / 10 4 m 3 ) etc.

[0059] r i组立 is the redundancy coefficient of the ith sub-assembly equipment, which is estimated by the shipyard according to the sub-assembly process requirements and rework rate of the target ship (such as lower than other ship types <1, higher than other ship types >1), and the value is recommended to be between 0.8-1.5.

[0060] 1.4, carbon emission of medium assembly and large assembly The carbon emission of medium assembly and large assembly is calculated by formula six, ; In the formula, i: the ith equipment for medium assembly and large assembly in the construction period of the target ship, including bridge crane, semi-gantry crane, manual welding machine, carbon dioxide welding machine, automatic submerged arc welding machine, submerged arc welding machine, planar assembly line, ABCD assembly line, electromagnetic bridge crane, gantry crane, welding flux drying machine, axial flow fan, etc. s i: The amount of work of the ith intermediate assembly and large assembly equipment on the target ship during the target ship construction period. For welding equipment work, for example, expressed in terms of consumable consumption, unit: kilogram (kg); for other equipment work, for example, expressed in terms of section weight, unit: kilogram (kg); S i : The amount of work of the ith intermediate assembly and large assembly equipment on all ships under construction during the target ship construction period. For welding equipment work, for example, expressed in terms of welding material consumption, unit: kilogram; for other equipment work, for example, expressed in terms of section weight, unit: kilogram; AD 中组立大组立j : The jth resource or energy consumed by the ith intermediate assembly and large assembly equipment during the target ship construction period, unit: ton (t), ten thousand kilowatt-hours (10 4 kWh), or ten thousand cubic meters (10 4 m 3 ), etc. EF 中组立大组立j : The carbon emission factor of the jth resource or energy, unit: ton of carbon dioxide per ton (tCO2 / t), ton of carbon dioxide per ten thousand kilowatt-hours (tCO2 / 10 4 kWh), or ton of carbon dioxide per ten thousand cubic meters (tCO2 / 10 4 m 3 ), etc.

[0061] r i中组立大组立 : The redundancy coefficient of the ith intermediate assembly and large assembly equipment, estimated by the shipyard according to the intermediate assembly and large assembly requirements of the target ship and the rework rate (such as lower than other ship types <1, higher than other ship types >1), recommended to be between 0.8-1.5.

[0062] 1.5, coating carbon emissions The coating carbon emissions are calculated using Formula Seven, ; In the formula, i: The ith equipment for coating work during the construction period of the target ship, including dehumidifiers, sandblasting systems, combined sanding machines, paint sprayers, dust collectors, recycling cleaning conveying systems, sandblasting vacuum sand suction systems, mobile vacuum cleaners, mobile vacuum sand suction machines, VOCs treatment devices, etc. s i : The amount of work of the ith coating work equipment on the target ship during the target ship construction period. The amount of work of equipment related to sanding (such as sanding, dust removal), for example, expressed in terms of sanding area, unit: m2; the amount of work of equipment related to spraying (such as painting, dehumidifying, VOCs treatment), for example, expressed in terms of spraying area, unit: m2; S i: The operation amount of the i-th coating equipment to all the under-construction ships in the target ship manufacturing period. The operation amount of the equipment related to sanding is expressed by sanding area, with unit of m2; the operation amount of the equipment related to spraying is expressed by spraying area, with unit of m2; AD 喷涂j : The j-th resource or energy consumed by the i-th coating equipment in the target ship manufacturing period, with unit of ton (t), ten thousand kilowatt-hours (10 4 kWh), or ten thousand cubic meters (10 4 m 3 , etc. EF 喷涂j : The carbon emission factor of the j-th resource or energy, with unit of ton of carbon dioxide per ton (tCO2 / t), ton of carbon dioxide per ten thousand kilowatt-hours (tCO2 / 10 4 kWh), or ton of carbon dioxide per ten thousand cubic meters (tCO2 / 10 4 m 3 , etc. r i涂装 : The redundancy coefficient of the i-th coating equipment, which is estimated by the shipyard according to the coating requirements of the target ship and the rework rate (e.g. lower than other ship types <1, higher than other ship types >1), and is recommended to be between 0.8-1.5.

[0063] 1.6, Carbon emission of pipe machining The carbon emission of pipe machining is calculated by Formula Eight, ; In the formula, i: The i-th equipment for pipe machining in the target ship construction period, including cutting machine, welding machine, etc. s i : The operation amount of the i-th pipe machining equipment to the target ship in the target ship construction period, expressed by the weight of machined parts, with unit of kilogram (kg). S i : The operation amount of the i-th pipe machining equipment to all the under-construction ships in the target ship manufacturing period, expressed by the weight of machined parts, with unit of kilogram. AD 管加工j : The j-th resource or energy consumed by the i-th pipe machining equipment in the target ship manufacturing period, with unit of ton (t), ten thousand kilowatt-hours (10 4 kWh), or ten thousand cubic meters (10 4 m 3 , etc. EF 管加工j : The carbon emission factor of the j-th resource or energy, with unit of ton of carbon dioxide per ton (tCO2 / t), ton of carbon dioxide per ten thousand kilowatt-hours (tCO2 / 10 4 kWh), or ton of carbon dioxide per ten thousand cubic meters (tCO2 / 104 m 3 )wait.

[0064] r i管加工 The redundancy coefficient of the i-th type of pipe processing equipment is estimated by the shipyard based on the pipe processing requirements and rework rate of the target ship (e.g., <1 if lower than other ship types, >1 if higher than other ship types), and is suggested to be between 0.8 and 1.5.

[0065] 1.7 Carbon emissions from machining Carbon emissions from machining are calculated using Formula Nine. ; In the formula: i: The i-th type of equipment used for machining during the construction period of the target ship, including marine three-roll plate bending machine, profile cold bending machine, rib cold bending machine, etc. s i During the construction period of the target ship, the amount of work done by the i-th type of machining equipment on the target ship, for example, expressed in terms of the weight of the processed parts, in kilograms (kg). S i : The amount of work done by the i-th type of machining equipment on all ship products under construction during the target ship manufacturing cycle, for example, expressed as the weight of the machined parts, in kilograms; AD 机加工j During the target ship manufacturing cycle, the j-th type of resource or energy consumed by the i-th type of machining equipment, in tons (t) or ten thousand kilowatt-hours (10 4 kWh) or 10,000 cubic meters (10 4 m 3 )wait; EF 机加工j : The carbon emission factor of the j-th resource or energy source, in tons of carbon dioxide per ton (tCO2 / t) or tons of carbon dioxide per 10,000 kilowatt-hours (tCO2 / 10 4 kWh) or tonnes of carbon dioxide per 10,000 cubic meters (tCO2 / 10 4 m 3 )wait.

[0066] r i机加工 The redundancy coefficient of the i-th type of machining equipment is estimated by the shipyard based on the machining requirements and rework rate of the target ship (e.g., <1 if lower than other ship types, >1 if higher than other ship types), and is suggested to be between 0.8 and 1.5.

[0067] 1.8. Outfitting carbon emissions

[0068] Outfitting carbon emissions are calculated using Formula 10. ; In the formula: i: the ith equipment for outfitting operation in the construction period of the target ship, including cutting machine, welding machine, crane, etc. s i : the operation amount of the ith outfitting operation equipment for the target ship in the construction period of the target ship, for example, expressed by the weight of processed parts, in kilograms (kg); S i : the operation amount of the ith outfitting equipment for all ships under construction in the construction period of the target ship, for example, expressed by the weight of processed parts, in kilograms (kg); AD 舾装j : the jth resource or energy consumed by the ith outfitting equipment in the construction period of the target ship, in tons (t), ten thousand kilowatt-hours (10 4 kWh) or ten thousand cubic meters (10 4 m 3 , etc. EF 舾装j : the carbon emission factor of the jth resource or energy, in tons of carbon dioxide per ton (tCO2 / t), tons of carbon dioxide per ten thousand kilowatt-hours (tCO2 / 104kWh) or tons of carbon dioxide per ten thousand cubic meters (tCO2 / 104m3), etc.

[0069] r i舾装 is the redundancy coefficient of the ith outfitting operation equipment, which is estimated by the shipyard according to the outfitting requirements of the target ship and the rework rate (such as <1 for other ship types and >1 for other ship types), and is recommended to be between 0.8 and 1.5.

[0070] 1.9, total assembly carbon emissions

[0071] The total assembly carbon emissions are calculated using Formula XI, ; In the formula: i: the ith equipment for total assembly operation in the construction period of the target ship, including cutting machine, welding machine, crane, etc. s i : the operation amount of the ith total assembly equipment for the target ship in the construction period of the target ship. For the operation amount of welding equipment, for example, expressed by the consumption of welding materials, in kilograms (kg); for the operation amount of equipment such as cranes, for example, expressed by the weight of total assembly parts, in kilograms (kg); S i : the operation amount of the ith total assembly equipment for all ships under construction in the construction period of the target ship. For the operation amount of welding equipment, for example, expressed by the consumption of welding materials, in kilograms (kg); for the operation amount of equipment such as cranes, for example, expressed by the weight of total assembly parts, in kilograms (kg); AD 总组搭载jDuring the target ship manufacturing cycle, the j-th type of resource or energy consumed by the i-th type of assembly equipment, in tons (t) or 10,000 kilowatt-hours (10 4 kWh) or 10,000 cubic meters (10 4 m 3 )wait; EF 总组搭载j : The carbon emission factor of the j-th resource or energy source, in tons of carbon dioxide per ton (tCO2 / t) or tons of carbon dioxide per 10,000 kilowatt-hours (tCO2 / 10 4 kWh) or tonnes of carbon dioxide per 10,000 cubic meters (tCO2 / 10 4 m 3 )wait.

[0072] r i总组搭载 The redundancy coefficient of the i-th type of assembly equipment is estimated by the shipyard based on the assembly requirements and rework rate of the target ship (e.g., less than 1 for lower than other ship types, greater than 1 for higher than other ship types), and is recommended to be between 0.8 and 1.5.

[0073] 1.10. Carbon emissions from mooring tests

[0074] The target vessel's mooring trials do not overlap with other ship products, and resource or energy consumption can be separately tallied without allocation. Carbon emissions from mooring trials are calculated using Formula XII. ; In the formula: i: The i-th type of energy resource consumed in the target ship's mooring test, including electricity, diesel, fuel oil, liquefied natural gas, methanol, etc.; AD 系泊i The consumption of the i-th type of resource or energy. The unit is tons (t), ten thousand kilowatt-hours (10⁴ kWh), or ten thousand cubic meters (10⁴ m³). 4 m 3 )wait; EF 系泊i : The carbon emission factor of the i-th resource or energy, in tons of carbon dioxide per ton (tCO2 / t) or tons of carbon dioxide per 10,000 kilowatt-hours (tCO2 / 10 4 kWh) or tonnes of carbon dioxide per 10,000 cubic meters (tCO2 / 10 4 m 3 )wait.

[0075] 1.11. Trial voyage carbon emission resources or energy The sea trials of the target vessel do not overlap with other shipbuilding operations, and resource or energy consumption can be separately accounted for without allocation. Carbon emissions from the sea trials are calculated using Formula Thirteen. ; In the formula: i: the i-th energy resource consumed by the target ship during the trial, including diesel, fuel oil, liquefied natural gas, methanol, etc. AD 试航i : the i-th resource energy consumption, in tons (t) or ten thousand kilowatt-hours (10 4 kW.h), etc. EF 试航i : the i-th resource energy carbon emission factor, in tons of carbon dioxide per ton (tCO2 / t) or tons of carbon dioxide per ten thousand kilowatt-hours (tCO2 / 10 4 kW.h), etc.

[0076] Note: The energy consumption of diesel, fuel oil, liquefied natural gas, methanol, etc. during the trial process comes from production statistics records.

[0077] 1.12, Other carbon emissions The target ship tightness test, pressure test, cargo containment system installation, roll-on / roll-off system installation, etc. do not have cross-operation with other ship products, and the resource or energy consumption can be calculated separately, and no allocation is involved. Refer to relevant specifications or established methods for execution.

[0078] 2, Carbon emissions of auxiliary production in the factory allocated to the target ship The energy consumption carbon emissions of auxiliary production systems are calculated using Formula Fourteen: ; In the formula: H 目标船 : the amount of steel consumed during the construction period of the target ship, in tons (t); H 全厂 : the amount of steel consumed by all ship products in the factory during the construction period of the target ship, in tons (t).

[0079] E 辅助生产 : the amount of carbon emissions generated by the energy consumption of auxiliary production systems in the shipyard during the manufacturing process of the target ship, in tons of carbon dioxide (tCO2eq).

[0080] 3, Carbon emissions of outsourcing processing of the target ship Outsourcing processing carbon emissions prefer to use data calculated by third-party institutions at outsourcing processing units. If it cannot be provided, refer to relevant specifications or established methods for execution.

[0081] 4, CO2 recycling amount allocated to the target ship The carbon dioxide recycling allocated to the target ship is calculated using Formula Fifteen: ; In the formula: E 回收: The amount of carbon dioxide (tCO2eq) captured, treated and reused in the manufacturing process of the target ship within the shipyard during the target ship manufacturing period. Refer to relevant standards or established methods for implementation.

[0082] 5. Carbon removal amount in the target ship yard The carbon removal amount in the target ship yard is calculated using Formula Sixteen: ; In the formula, E 清除 : The amount of carbon removal (tCO2) within the entire shipyard boundary during the target ship manufacturing period. Refer to relevant standards, specifications or established methods for implementation.

[0083] II. Definition and calculation of carbon emission intensity index 1. Carbon emission intensity of the target ship building process The carbon emission intensity of the target ship building process is calculated using Formula Seventeen: ; In the formula, C 厂内工艺 : The carbon emission intensity of the target ship building process, which can be the carbon emission intensity of one process or the cumulative carbon emission intensity of multiple processes, with the unit of tons of carbon dioxide per ton (tCO2eq / t).

[0084] E 厂内工艺 : The carbon emission of the target ship building process in the shipyard, which can be the carbon emission of one process or the cumulative carbon emission of multiple processes, with the unit of tons of carbon dioxide (tCO2eq).

[0085] D 目标船 : The deadweight tonnage of the target ship, with the unit of tons (t), obtained from the ship specification parameters.

[0086] 2. Carbon emission intensity of the target ship building stage The carbon emission intensity of the target ship building stage is calculated using Formula Eighteen: ; In the formula, C 目标船 : The carbon emission intensity of the target ship building stage, with the unit of tons of carbon dioxide per ton (tCO2eq / t).

[0087] E 目标船-建造 : The carbon emission of the target ship building stage, with the unit of tons of carbon dioxide, calculated using Formula One.

[0088] 3. Average carbon emission of shipyard ship products The average carbon emission of shipyard ship products is calculated by Formula 19: ; In the formula, E 船舶产品-AVE : The average carbon emission of shipyard ship products in the statistical period, in units of tons of carbon dioxide per ton (tCO2eq / t).

[0089] E i-建造 : The carbon emission of the i-th ship product in the construction stage, in units of tons of carbon dioxide (tCO2eq); n: The number of ship products constructed in the statistical period.

[0090] 4. Average carbon emission intensity of shipyard ship products The average carbon emission intensity of shipyard ship products is calculated by Formula 20: ; In the formula, C 船舶产品-AVE : The average carbon emission intensity of shipyard ship products in the statistical period, in units of tons of carbon dioxide per ton (tCO2eq / t).

[0091] E i-建造 : The carbon emission of the i-th ship product in the construction stage, in units of tons of carbon dioxide (tCO2eq); D i : The deadweight tonnage (t) of the i-th ship product constructed in the statistical period.

[0092] III. Evaluation of process level and production management Review the report files, statistical reports, and original records, and conduct on-site investigations, sampling investigations, etc. according to the actual situation to ensure the completeness and accuracy of the data.

[0093] Evaluate the energy consumption and carbon emission level of the process by referring to relevant data released by the industry, determine the energy consumption level of the enterprise, find out the weak links, and propose improvement measures.

[0094] Table 1: Evaluation table for shipyard process level

[0095] Note: The above values below or above include the base number. The score distribution, benchmark value, and deduction standard can be adjusted regularly according to the actual situation. 90-100 is excellent, 80-89 is good, 70-79 is medium, 60-69 is pass, and below 60 is not passing.

[0096] Table 2: Evaluation table for shipyard production management

[0097] Note: The above lower or higher than the parity number. Score distribution, points deduction standards can be adjusted regularly according to the actual situation. 90-100 for excellent, 80-89 for good, 70-79 for medium, 60-69 for pass, less than 60 for fail.

[0098] IV. Carbon emission analysis of target ship building stage The physical energy and resource consumption, comprehensive energy consumption, and carbon emission of each process link of the target ship are statistically analyzed to obtain the proportion of the physical energy and resource consumption, comprehensive energy consumption, and carbon emission of each process link.

[0099] The carbon emission and emission intensity of the target ship building stage are analyzed and evaluated. According to the carbon emission analysis of the target ship building stage, the process level and production management of the shipyard are analyzed and evaluated, the weak links of the enterprise process and production management are identified, and improvement measures are proposed.

[0100] The above implementation manners are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application. Those skilled in the art can also make other changes within the spirit of the present application and use them in the design of the present application, as long as they do not deviate from the technical effects of the present application. These changes made in accordance with the spirit of the present application should be included in the scope of the present application.

Claims

1. A method of calculating carbon emissions for a target ship construction phase, characterized in that, Comprising the following steps: S1: target ship construction phase, calculation of carbon emissions generated by the in-plant process of the target ship, calculation of carbon emissions generated by the in-plant auxiliary production facilities allocated to the target ship, calculation of carbon emissions generated by the outsourcing of the target ship, calculation of the in-plant CO2 recovery allocated to the target ship, calculation of the in-plant carbon removal allocated to the target ship; S2: According to the calculation results in the step S1, the target ship construction phase carbon emission calculation is carried out according to formula one: Formula one: ； In the formula: Carbon emissions during the construction phase of the target ship, expressed in tons of CO2 equivalent; Carbon emissions from the in-plant process of the target ship, in tons of CO2 equivalent, for the target ship building phase; Carbon emissions for the target ship construction phase, in tonnes of CO2 equivalent, allocated to the carbon emissions generated by the in-house auxiliary production facilities for the target ship; Target Ship Construction Phase, the carbon emissions generated by the outsourcing of the target ship, in tons of CO2 equivalent; Target ship construction phase, the amount of in-plant CO2 recovery and utilization allocated to the target ship, in tons of CO2 equivalent; Carbon removal in the yard for the target ship, in tons of CO2 equivalent, allocated to the target ship.

2. The method of claim 1, wherein, In the step S1, the target ship in-plant process carbon emission calculation method is calculated according to formula two; Formula two: ； In the formula: Carbon emissions in tons of CO2 equivalent produced by pre-treatment for the construction phase of the target ship; Carbon emissions in tons of CO2 equivalent produced by cutting for the construction phase of the target ship; Carbon emissions in tonnes of CO2 equivalent for the construction phase of the target ship resulting from the production of the sub-assemblies of the hull block; Carbon emissions from the assembly of large blocks in the construction phase of the target ship, in tonnes of CO2 equivalent; Carbon emissions from painting for the construction phase of the target ship, in tons of CO2 equivalent; Carbon emissions from the construction phase of the target ship in tonnes of CO2 equivalent; Carbon emissions from machining for the construction phase of the target ship, in tonnes of CO2 equivalent; Carbon emissions in tons of CO2 equivalent for the construction phase outfitting of the target ship; Carbon emissions from the total assembly of the shipbuilding phase for the target ship, in tons of CO2 equivalent; Carbon emissions in tonnes of CO2 equivalent generated for the construction phase of the target vessel for the mooring trial; Carbon emissions in tonnes of CO2 equivalent generated by the target ship for the purpose of building phase trials; Carbon emissions from other processes or activities in the construction phase of the target ship, including air tightness testing, pressure testing, cargo containment system installation, roll on roll off system installation, in tonnes of CO2 equivalent.

3. The method of claim 2, wherein, The carbon emissions generated by the target ship construction phase pretreatment are calculated by formula three; Formula three: ； In the formula: i: the i-th device for pretreatment operation in the target ship construction period, including steel plate leveling machine, pretreatment line, pretreatment line RTO; s 预处理i : the amount of work of the ith pretreatment device on the target ship within the target ship construction period, expressed in pretreatment area, in square meters; S 预处理i : the amount of work of the i-th pre-treatment device on all the ships under construction in the target shipbuilding period, in terms of pre-treatment area, in square meters; AD 预处理j : the jth resource or energy consumed by the ith pretreatment device in the target shipbuilding period, in tons, ten kilowatt-hours, or ten cubic meters EF 预处理j : carbon emission factor of the jth resource or energy, in ton of carbon dioxide per ton, ton of carbon dioxide per 10,000 kilowatt-hours, or ton of carbon dioxide per 10,000 cubic meters; r i预处理 The redundancy coefficient r of the i-th pre-treatment device is estimated by the shipyard according to the pre-treatment requirements of the target ship and the rework rate, and the value of r ranges from 0.8 to 1.

5.

4. The method of claim 2, wherein, The carbon emissions generated by the cutting of the target ship construction phase are calculated by formula four; Formula four: ； In the formula: i: the i-th related equipment for cutting operation in the target ship construction period, including flame cutting machine, plasma cutting machine, laser cutting machine; s 切割i : the work amount of the i-th cutting device to the target ship in the target ship building period, expressed by the cutting cross-sectional area, in square meters; S 切割i : the work amount of the i-th cutting device to all the under-construction ship products in the target ship manufacturing period, in terms of the cutting cross-sectional area, in units of m 2 ; AD 切割j : the jth resource or energy consumed by the ith cutting equipment in the target shipbuilding period, in tons, ten kilowatt-hours, or ten cubic meters EF 切割j : carbon emission factor of the jth resource or energy, in ton of carbon dioxide per ton, ton of carbon dioxide per 10,000 kilowatt-hours, or ton of carbon dioxide per 10,000 cubic meters; r i切割 The redundancy coefficient r of the i-th cutting device is estimated by the shipyard according to the cutting requirements of the target ship and the rework rate, and the value of r ranges from 0.8 to 1.

5.

5. The method of claim 2, wherein, The carbon emissions generated by the target ship construction phase segment small group assembly are calculated by formula five; Formula five: ； In the formula: i: the i-th equipment for small group assembly operation in the target ship construction period, including bridge crane, semi-gantry crane, manual welding machine, carbon dioxide welding machine, automatic submerged arc welding machine, submerged arc welding machine, part assembly line, T-shaped automatic welding production line, silicon controlled carbon arc gas planer; s 小组立i : the work amount of the ith type of subassembly equipment to the target ship in the target ship building period; for welding type equipment, the work amount is represented by welding material consumption, in kilograms; for other types of equipment, the work amount is represented by the weight of the subassembly section, in kilograms; S 小组立i : the work amount of the i-th small group outfitting equipment to all the ships under construction in the target shipbuilding period; For welding equipment operation, the amount of welding material used is expressed in kilograms; for other types of equipment, the amount of operation is expressed in kilograms; AD 小组立j : the jth resource / energy consumed by the ith group assembly operation equipment in the target shipbuilding period, in ton, ten kilowatt-hour or ten cubic meter EF 小组立j : Carbon emission factor of the jth resource / energy, in ton of CO2 per ton, ton of CO2 per 10,000 kWh, or ton of CO2 per 10,000 cubic meters; r i焊接 The redundancy coefficient r of the i-th welding equipment is estimated by the shipyard according to the small group assembly process requirements and rework rate of the target ship, and the value of r ranges from 0.8 to 1.

5.

6. The method of claim 2, wherein, The carbon emissions generated by the target ship construction phase medium assembly large assembly are calculated by formula six; Formula six: ； In the formula: i: the i-th equipment for medium assembly and large assembly in the target ship construction period, including bridge crane, semi-gantry crane, manual welding machine, carbon dioxide welding machine, automatic submerged arc welding machine, submerged arc welding machine, planar assembly line, ABCD assembly line, electromagnetic bridge crane, gantry crane, flux drying machine, axial flow fan; s 中组立大组立i : the work amount of the ith medium-block assembly large-block assembly equipment to the target ship in the target ship construction period; for welding equipment work, expressed by consumable consumption, unit: kilogram; for other equipment work, expressed by the weight of the block, unit: kilogram; S 中组立大组立i : The work amount of the i-th sub-assembly large assembly equipment for all the ships under construction in the target ship's manufacturing cycle; for welding equipment work, expressed in welding material consumption, unit: kg; for other equipment work, expressed in the weight of the section, unit: kg; AD 中组立大组立j : the jth resource or energy consumed by the ith medium assembly equipment in the target shipbuilding period, in tons, ten kilowatt-hours or ten cubic meters EF 中组立大组立j : carbon emission factor of the jth resource / energy, in ton of CO2 per ton, ton of CO2 per 10,000 kWh or ton of CO2 per 10,000 m3; r i中组立大组立 The redundancy coefficient of the i-th mid-ship erection large-ship erection device is estimated by the shipyard according to the mid-ship erection large-ship erection requirement of the target ship and the rework rate, and the value of r ranges from 0.8 to 1.

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7. The method of claim 2, wherein, The carbon emissions generated by the target ship construction phase coating are calculated by formula seven; Formula seven: ； In the formula: i: the i-th equipment for coating operation in the target ship construction period, including dehumidifier, sandblasting system, combined sanding machine, paint spraying machine, dust collector, recycling cleaning conveying system, sandblasting vacuum sand suction system, mobile vacuum cleaner, mobile vacuum sand suction machine, VOCs treatment device; s 涂装i : target ship construction cycle, the amount of work of the i-th painting operation equipment on the target ship; the sanding-related equipment work is expressed in terms of sanding area, with units of square meters; The amount of equipment operation related to spraying is expressed in square meters; S 涂装i : The operation amount of the i-th coating equipment to all the ships under construction in the target ship manufacturing period, the sanding-related equipment operation uses the sanding area, with the unit of square meters; the equipment operation related to spraying uses the spraying area, with the unit of square meters; AD 喷涂j : the jth resource or energy consumed by the ith coating equipment in the target shipbuilding period, in tons, ten kilowatt-hours, or ten cubic meters EF 喷涂j : carbon emission factor of the jth resource or energy, in ton of carbon dioxide per ton, ton of carbon dioxide per 10,000 kilowatt-hours, or ton of carbon dioxide per 10,000 cubic meters; r i喷涂 The redundancy coefficient r of the i-th coating equipment is estimated by the shipyard according to the coating requirements of the target ship and the rework rate, and the value of r ranges from 0.8 to 1.

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8. The method of claim 2, wherein, The carbon emissions generated by the target ship construction phase pipe processing are calculated by formula eight; Formula eight: ； In the formula: i: the i-th equipment for pipe processing in the target ship construction period, including cutting machine, welding machine; s 管加工i : the work load of the i-th pipe processing equipment to the target ship in the target ship construction period, expressed by the weight of the processed parts, in kg; S 管加工i : The work amount of the i-th pipe processing equipment for all the ships under construction in the target ship manufacturing cycle, expressed in terms of the processing piece weight, in kilograms; AD 管加工j : the jth resource or energy consumed by the ith pipe processing equipment in the target shipbuilding period, in ton, kilowatt-hour or cubic meter EF 管加工j : carbon emission factor of the jth resource or energy, in ton of carbon dioxide per ton, ton of carbon dioxide per 10,000 kilowatt-hours, or ton of carbon dioxide per 10,000 cubic meters; r i管加工 The redundancy coefficient r of the i-th pipe processing equipment is estimated by the shipyard according to the pipe processing requirements of the target ship and the rework rate, and the value of r ranges from 0.8 to 1.

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9. The method of claim 2, wherein, The carbon emissions generated by the target ship construction phase machining are calculated by formula nine; Formula nine: ； In the formula: i: the i-th equipment for machining in the target ship construction period, including ship three-roll plate bending machine, profile cold bending machine, rib cold bending machine; s 机加工i : the work load of the i-th machining equipment to the target ship in the target ship construction period, expressed by the weight of the machined parts, in kg; S 机加工i : The work amount of the i-th machining equipment to all the ships under construction in the target ship manufacturing cycle, expressed in terms of the weight of machined parts, in kilograms; AD 机加工j : the jth resource or energy consumed by the ith machining equipment in the target shipbuilding period, in ton, kilowatt-hour or cubic meter EF 机加工j : carbon emission factor of the jth resource or energy, in ton of carbon dioxide per ton, ton of carbon dioxide per 10,000 kilowatt-hours, or ton of carbon dioxide per 10,000 cubic meters; r i机加工 The redundancy coefficient r of the i-th machining equipment is estimated by the shipyard according to the machining requirements of the target ship and the rework rate, and the value of r ranges from 0.8 to 1.

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10. The method of claim 2, wherein, The carbon emission amount generated by the outfitting of the target ship construction stage is calculated by Formula Ten; Formula Ten: ； In the formula: i: the i-th equipment for outfitting operation in the construction period of the target ship, including cutting machine, welding machine, and crane; s 舾装i : the work amount of the ith outfitting operation equipment to the target ship in the target ship construction period, expressed by the weight of the processed piece, in kilograms (kg); S 舾装i : The work amount of the i-th outfitting equipment for all the ships under construction in the target ship's manufacturing cycle, expressed in terms of the weight of processed pieces, in kilograms; AD 舾装j : the jth resource or energy consumed by the ith outfitting equipment in the target shipbuilding period, in tons, ten kilowatt-hours or ten cubic meters EF 舾装j : carbon emission factor of the jth resource or energy, in ton of carbon dioxide per ton, ton of carbon dioxide per 10,000 kilowatt-hours, or ton of carbon dioxide per 10,000 cubic meters; r i舾装 The redundancy coefficient r of the i-th outfitting equipment is estimated by the shipyard according to the outfitting requirements of the target ship and the rework rate, and the value of r ranges from 0.8 to 1.

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11. The method of claim 2, wherein, The carbon emission amount generated by the total assembly loading of the target ship construction stage is calculated by Formula Eleven; Formula Eleven: ； In the formula: i: the i-th equipment for total assembly loading operation in the construction period of the target ship, including cutting machine, welding machine, and crane; s 总组搭载i : the work amount of the i-th total assembly equipment to the target ship in the target ship construction period; for the work amount of the welding equipment, it is expressed by the welding material consumption amount, for example, in kilograms; for the work amount of the crane equipment, it is expressed by the total assembly piece weight, for example, in kilograms; S 总组搭载i : The operation amount of the i-th total assembly equipment to all under-construction ship products in the target ship manufacturing period; for the welding equipment, the operation amount is represented by the welding material consumption, with the unit of kilogram; for the crane equipment, the operation amount is represented by the total assembly equipment weight, with the unit of kilogram; AD 总组搭载j : the jth resource or energy consumed by the ith total group of equipment for the target shipbuilding cycle, in tons, ten kilowatt-hours, or ten cubic meters EF 总组搭载j : carbon emission factor of the jth resource or energy, in ton of carbon dioxide per ton, ton of carbon dioxide per 10,000 kilowatt-hours, or ton of carbon dioxide per 10,000 cubic meters; r i总组搭载 The redundancy coefficient r of the i-th total assembly is estimated by the shipyard according to the total assembly requirements of the target ship and the rework rate, and the value of r ranges from 0.8 to 1.

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12. The method of claim 2, wherein, The carbon emission amount generated by the mooring test of the target ship construction stage is calculated by Formula Twelve; Formula Twelve: ； In the formula: i: the i-th resource energy consumed by the mooring test of the target ship, including electricity, diesel, fuel oil, liquefied natural gas, and methanol; AD 系泊i : the consumption of the ith resource or energy, in tons, kilowatt-hours or cubic meters EF 系泊i : Carbon emission factor of the i-th resource or energy, in ton of CO2 per ton, ton of CO2 per 10,000 kWh, or ton of CO2 per 10,000 m3.

13. The method of claim 2, wherein: The carbon emission amount generated by the sea trial of the target ship construction stage is calculated by Formula Thirteen; Formula Thirteen: ； In the formula: i: the i-th resource energy consumed by the sea trial of the target ship, including diesel, fuel oil, liquefied natural gas, and methanol; AD 试航i : the consumption of the i-th resource energy, in tons or kilowatt-hours EF 试航i : Carbon emission factor of the i-th resource energy, in ton of CO2 per ton or ton of CO2 per 10,000 kWh.

14. The method of claim 1, wherein: In the step S1, The carbon emission amount generated by the in-plant auxiliary production facilities of the target ship construction stage is calculated by Formula Fourteen, Formula Fourteen: ； The in-plant CO2 recovery amount of the target ship construction stage is calculated by Formula Fifteen, Formula Fifteen: ； The in-plant carbon removal amount of the target ship construction stage is calculated by Formula Sixteen, Formula Sixteen: ； In the formula: H 目标船 : the amount of steel consumed in the construction period of the target ship, in tons; H 全厂 : Steel consumption of all ship products in the whole plant during the construction period of the target ship, in tons; E 辅助生产 : Carbon emissions from the shipyard auxiliary production system during the target shipbuilding process, in tons of CO2 E 回收 : The amount of carbon emissions, in tons of CO2, that a shipyard will capture, treat, and reuse during the manufacturing process of a target ship during its construction period from sources of emissions. E 清除 : The amount of carbon removal in tons of CO2 within the plant boundary during the target shipbuilding period.

15. A method of calculating the process carbon intensity of a target shipbuilding yard, characterized in that, The target ship construction phase carbon emission amount calculation method according to any one of claims 2 to 14 calculates In combination with formula seventeen, formula seventeen: ； C 目标船-工艺 : the in-plant process carbon intensity of the target ship building stage, in ton of CO2 / ton, is the carbon intensity of one process or the cumulative carbon intensity of multiple processes; D 目标船 : deadweight tonnage of the target ship in tons, obtained from the ship specification parameters.

16. A method of calculating the carbon intensity of a target ship building phase, characterized in that, The target ship construction phase carbon emission amount is calculated according to the method of any one of claims 1-14 and formula 18, formula 18: ； In the formula: C 目标船 : Carbon intensity of the target ship building phase in tons of CO2 per ton; E 目标船-建造 : Carbon emissions of the target ship building phase in tons of CO2; D 目标船 : deadweight tonnage of the target ship in tons, obtained from the ship specification parameters.

17. A method of calculating the average carbon intensity of a shipyard ship product, characterized in that, The target ship construction phase carbon emission amount is calculated according to the method of any one of claims 1 to 14 The average carbon emission amount of the shipyard ship product is calculated again by Formula Nineteen, Formula Nineteen: ； In the formula: E 船舶产品-AVE : Average carbon emissions of shipyard ship products in the statistical period, in tons of CO2 per ton; E i-建造 : Carbon emissions of the i-th ship product construction phase in tons of carbon dioxide (tCO2eq); n: the number of ship products built in the statistical period; The average carbon emission intensity of the shipyard ship products is calculated by Formula Twenty, Formula Twenty: ； In the formula: C 船舶产品-AVE : average carbon intensity of shipyard ship products in the statistical period, in tons of CO2 per ton; E i-建造 : Carbon emissions of the i-th ship product construction phase in tons of CO2; D i : deadweight tons of the i-th ship product built in the statistical period.

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