Concrete member carbon emission calculation method, device, equipment, medium and product

Abstract

The invention discloses a concrete member carbon emission calculation method and device, equipment, a medium and a product, and the method comprises the steps: carrying out the data monitoring and collection of a prefabrication process of a concrete member, and obtaining the energy consumption data, material consumption data, CO2 filling amount, environment CO2 concentration dynamic change data and mold usage amount; according to the dynamic change data of the CO2 concentration of the environment, the CO2 unorganized dissipation amount is calculated; according to the usage amount of the mold, the carbon compensation amount of mold material recycling is calculated; and calculating the carbon emission of the concrete member prefabrication process and the carbon emission of the workshop sharing project according to the data, thereby obtaining the carbon emission of the prefabrication process. According to the method, all energy and material consumption caused by component prefabrication requirements in the prefabrication stage of the concrete component, carbon emission of workshop shared projects, carbon emission caused by CO2 inorganized dissipation and carbon emission reduction in the prefabrication process are considered, and therefore the accuracy of calculation of the carbon emission of the concrete component can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building carbon emissions, and in particular to a method, device, equipment, medium and product for calculating carbon emissions from concrete components. Background Art

[0002] The construction industry is a significant component of my country's carbon emissions. The mining, production, transportation, and construction of building materials generated by the construction industry account for over 20% of total carbon emissions. Prefabricated buildings are a key component of my country's new building industrialization, with concrete structures being the predominant structural type. By 2023, there were approximately 1,360 prefabricated concrete component manufacturers nationwide, producing prefabricated floor slabs, shear walls, staircases, and other prefabricated components that were widely used in residential and other buildings.

[0003] Current carbon emission calculation methods for concrete structures are applicable to the macro-level of industry, organization, and enterprise, but are not suitable for measuring product carbon emissions. Calculations only yield aggregate carbon emissions data, failing to reflect intermediate processes or identify emission sources. Furthermore, because factories fail to separate production from other energy uses, such as those for daily life, in real-world data management, data collected at the enterprise level is mixed with non-production energy use to varying degrees. Furthermore, this method is incomplete, failing to account for the material consumption and embodied carbon emissions associated with the prefabrication of concrete components. It also fails to consider the unique characteristics of prefabricated concrete materials and the prefabrication process, leading to inaccurate calculations. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method, device, equipment, medium and product for calculating the carbon emissions of concrete components, which takes into account all energy and material consumption generated by the prefabrication needs of components during the prefabrication stage of concrete components, the carbon emissions of workshop shared projects, the carbon emissions caused by unorganized CO2 escape, and the carbon emission reduction during the prefabrication process, thereby effectively improving the accuracy of the carbon emission calculation of concrete components.

[0005] To achieve the above objectives, an embodiment of the present invention provides a method for calculating carbon emissions of concrete components, comprising: monitoring and collecting data during the prefabrication process of each concrete component to obtain energy consumption data, material consumption data, CO2 injection volume, dynamic change data of ambient CO2 concentration, and mold usage data for each concrete component; Calculating the amount of unorganized CO2 emission based on the dynamic change data of the ambient CO2 concentration; Calculating the carbon compensation amount of the mold material recycling and reuse based on the mold usage; Calculate the carbon emissions of each concrete component prefabrication process based on the energy consumption data, the material consumption data, the CO2 injection amount, the CO2 fugitive emission amount, and the carbon compensation amount; Calculate the carbon emissions of each common project in the workshop based on the energy consumption data, material consumption data, carbon emission factor, volume of the concrete components, and the total volume of prefabricated components in the workshop; The carbon emissions of the prefabrication process and the carbon emissions of the workshop common projects are added together to obtain the carbon emissions of each concrete component prefabrication process.

[0006] As an improvement to the above solution, the calculation of the amount of unorganized CO2 emission based on the dynamic change data of the ambient CO2 concentration includes: According to the CO2 concentration dynamic change data, a CO2 concentration-time curve is obtained by fitting, and the CO2 concentration peak value is determined; Determine the CO2 release start time and CO2 decay end time according to the CO2 concentration-time curve and the CO2 concentration peak time; wherein the CO2 release period is from the CO2 release start time to the CO2 concentration peak time, and the CO2 decay period is from the CO2 concentration peak time to the CO2 decay end time; Fitting the CO2 decay period of the CO2 concentration-time curve to calculate the CO2 release rate; According to the CO2 release rate, the amount of CO2 unorganized escape is calculated.

[0007] As an improvement to the above solution, the carbon compensation amount of the mold material recycling and reuse is calculated based on the mold usage, including: Calculate the total carbon reduction from mold material recycling and reuse based on the mold usage, mold material recycling and reuse rate, carbon emission factor of virgin mold material, and carbon emission factor of recycled and reused mold material; The total carbon reduction amount of the recycled and reused mold material is multiplied by a preset value to obtain the carbon compensation amount of the recycled and reused mold material.

[0008] As an improvement to the above scheme, the carbon emissions of the prefabrication process include the carbon emissions of the prefabrication process of the factory and the carbon emissions of the prefabrication process of the outsourced factory, and the carbon emissions of the workshop shared projects include the carbon emissions of the workshop shared projects of the factory and the carbon emissions of the workshop shared projects of the outsourced factory.

[0009] As an improvement to the above solution, the prefabrication process includes a steel bar processing process, a concrete mixing process, a mold making process, and a concrete component making process. Then, the carbon emissions of each concrete component prefabrication process are calculated based on the energy consumption data, the material consumption data, the CO2 injection amount, the CO2 fugitive emission amount, and the carbon compensation amount, including: Determine at least one processing step of the steel bar processing process and a functional unit corresponding to each processing step; wherein the functional unit is a basic unit for calculating the carbon emissions of the corresponding processing step; Calculate the carbon emissions of the steel bar processing process based on the number of functional units, energy consumption data, material consumption data, and carbon emission factors corresponding to each processing process; Determining at least one processing step of the concrete mixing process and a functional unit corresponding to each processing step; Calculate the carbon emissions of the concrete mixing process based on the number of functional units, energy consumption data, carbon emission factors, and CO2 injection volume corresponding to each processing step; Determine at least one processing step of the mold manufacturing process and a functional unit corresponding to each processing step; Calculate the carbon emissions of the mold manufacturing process based on the number of functional units, energy consumption data, material consumption data, carbon emission factors, the amount of unorganized CO2 emissions, and the carbon compensation amount corresponding to each processing step; Determining at least one processing step of the concrete component manufacturing process and a functional unit corresponding to each processing step; Calculate the carbon emissions of the concrete component manufacturing process based on the number of functional units, energy consumption data, material consumption data, and CO2 injection amount corresponding to each processing step; The carbon emissions of the steel bar processing process, the carbon emissions of the concrete mixing process, the carbon emissions of the mold making process, and the carbon emissions of the concrete component making process are added together to obtain the carbon emissions of each concrete component prefabrication process.

[0010] As an improvement to the above solution, the method further includes: The carbon emissions of each concrete component prefabrication process, the carbon emissions of the prefabrication process, the carbon emissions of the workshop common projects, and the process analysis list are stored in layers; wherein, the process analysis list includes data on various energy sources, material consumption, CO2 injection volume, CO2 unorganized emission volume, carbon compensation volume, and corresponding carbon emission factor data.

[0011] An embodiment of the present invention further provides a device for calculating carbon emissions of concrete components, comprising: A data acquisition module is used to monitor and collect data on the prefabrication process of each concrete component to obtain energy consumption data, material consumption data, CO2 charging volume, dynamic change data of ambient CO2 concentration, and mold usage of each concrete component; a dissipation calculation module for calculating the amount of unorganized CO2 dissipation based on the dynamic change data of the ambient CO2 concentration; a carbon compensation calculation module for calculating the carbon compensation amount of mold material recycling and reuse based on the mold usage; a process carbon emission calculation module for calculating the carbon emissions of each concrete component prefabrication process based on the energy consumption data, the material consumption data, the CO2 charging amount, the unorganized CO2 dissipation amount, and the carbon compensation amount; a shared carbon emission calculation module for calculating the carbon emissions of the shared projects of the workshop based on the energy consumption data, material consumption data, carbon emission factors, the volume of the concrete components, and the total volume of prefabricated components in the workshop corresponding to each shared project in the workshop; The component carbon emission calculation module is used to add the carbon emission of the prefabrication process and the carbon emission of the workshop common project to obtain the carbon emission of each concrete component prefabrication process.

[0012] An embodiment of the present invention further provides a terminal device, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor implements any of the above-mentioned methods for calculating carbon emissions of concrete components when executing the computer program.

[0013] An embodiment of the present invention further provides a computer-readable storage medium, which includes a stored computer program. When the computer program is executed, the device where the computer-readable storage medium is located is controlled to execute any of the above-mentioned methods for calculating carbon emissions of concrete components.

[0014] An embodiment of the present invention further provides a computer program product, which includes a computer program or computer instructions. When the computer program or computer instructions are executed by a processor, any of the above-mentioned methods for calculating carbon emissions of concrete components is implemented.

[0015] Compared with the prior art, the advantageous effects of a method, device, equipment, medium and product for calculating carbon emissions of concrete components provided by an embodiment of the present invention are as follows: by monitoring and collecting data on the prefabrication process of each concrete component, energy consumption data, material consumption data, CO2 charging amount, dynamic change data of environmental CO2 concentration and mold usage of each concrete component are obtained; based on the dynamic change data of environmental CO2 concentration, the amount of CO2 fugitive emission is calculated; based on the mold usage, the amount of carbon compensation for mold material recycling and reuse is calculated; based on the energy consumption data, the material consumption data, the CO2 charging amount, the fugitive CO2 emission amount and the carbon compensation amount, the carbon emissions of each concrete component prefabrication process are calculated; based on the energy consumption data, the material consumption data, the CO2 charging amount, the fugitive CO2 emission amount and the carbon compensation amount, the carbon emissions of the common projects of the workshop are calculated according to the energy consumption data, the material consumption data, the carbon emission factor, the volume of the concrete component and the total volume of prefabricated components in the workshop corresponding to each common project of the workshop; the carbon emissions of the prefabrication process of each concrete component are added together with the carbon emissions of the common projects of the workshop to obtain the carbon emissions of each concrete component prefabrication process. The embodiment of the present invention takes into account all energy and material consumption generated by the prefabrication of concrete components, the carbon emissions of workshop shared projects, the carbon emissions caused by unorganized CO2 emission, and the carbon emission reduction during the prefabrication process, thereby effectively improving the accuracy of the carbon emission calculation of concrete components. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a flow chart of a preferred embodiment of a method for calculating carbon emissions of concrete components provided by the present invention; Figure 2 It is a schematic diagram of the whole life cycle stages of cast-in-place concrete building RC; Figure 3 It is a schematic diagram of the whole life cycle stages of prefabricated concrete building PC; Figure 4 This is a schematic diagram of the carbon emission measurement stage in a method for calculating carbon emissions of concrete components provided by the present invention; Figure 5 This is a schematic diagram of carbon compensation data allocation for mold material recycling and reuse in a method for calculating carbon emissions of concrete components provided by the present invention; Figure 6 It is a schematic diagram of prefabricated carbon emission measurement in the prior art; Figure 7 This is a schematic diagram of carbon emission measurement in the prefabrication process of a concrete component carbon emission calculation method provided by the present invention; Figure 8 This is a schematic diagram of hierarchical storage of calculation data in a method for calculating carbon emissions of concrete components provided by the present invention; Figure 9This is a schematic structural diagram of a preferred embodiment of a concrete component carbon emission calculation device provided by the present invention; Figure 10 It is a structural diagram of a preferred embodiment of a terminal device provided by the present invention. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0018] See also Figure 1 , Figure 1 The figure is a flow chart of a preferred embodiment of a method for calculating carbon emissions of concrete components provided by the present invention. The method for calculating carbon emissions of concrete components includes: S1, monitoring and collecting data on the prefabrication process of each concrete component to obtain energy consumption data, material consumption data, CO2 charging amount, dynamic change data of ambient CO2 concentration, and mold usage of each concrete component; S2, calculating the amount of unorganized CO2 emission based on the dynamic change data of the ambient CO2 concentration; S3, calculating the carbon compensation amount of the mold material recycling and reuse based on the mold usage; S4, calculating the carbon emissions of each concrete component prefabrication process based on the energy consumption data, the material consumption data, the CO2 injection amount, the CO2 fugitive emission amount, and the carbon compensation amount; S5, calculating the carbon emissions of each common project in the workshop based on the energy consumption data, material consumption data, carbon emission factor, volume of the concrete component, and the total volume of prefabricated components in the workshop; S6, adding the carbon emissions of the prefabrication process and the carbon emissions of the workshop common projects to obtain the carbon emissions of each concrete component prefabrication process.

[0019] It should be noted that among bulk industrial raw materials, cement production carbon emissions have received considerable attention both domestically and internationally. Based on the carbon emission calculation principles for general industries or products, carbon emission calculation methods have been developed for the cement industry and at the enterprise level. A typical example is CETS-AG-02.01-V01-2024, "Corporate Greenhouse Gas Emissions Accounting and Reporting Guidelines - Cement Industry," from the "Corporate Greenhouse Gas Emissions Accounting and Reporting Guidelines" series of specifications. The calculation is based on the input-output (IO) method, calculating carbon emissions at the industry or enterprise level using data on fossil fuel, electricity, cement clinker usage, and corresponding energy and material carbon emission factors.

[0020] In addition to cement, the China Association for Engineering Construction Standardization's standard "Technical Specifications for Calculating Greenhouse Gas Emissions from Ready-Mixed Concrete Enterprises" calculates the total greenhouse gas emissions of the reporting entity (enterprise) during the statistical period through the production process of purchased raw materials, the transportation process of purchased raw materials outside the factory, the transportation process of mobile sources within the factory, fixed source equipment within the factory, purchased electricity, purchased heat, fugitive source equipment within the factory, and the transportation process of ready-mixed concrete from outside the factory to the construction site.

[0021] Regarding prefabricated buildings, the Fujian Provincial Engineering Construction Local Standard, “Fujian Provincial Prefabricated Building Carbon Emission Calculation Standard,” does not provide a calculation method for prefabricated concrete components. Instead, it directly provides carbon emissions for seven products in five categories: steel tube truss prestressed concrete composite slabs, composite beams, composite floor slabs, stairs, and air conditioning panels, with carbon emissions ranging from 524 to 1566 kgCO2e / m 3 The "Calculation Standard and Analysis Method for Carbon Emissions of Prefabricated Buildings" published by the Zhongguancun Materials Testing Technology Alliance is similar, giving carbon emission factors for four products provided by a Fujian company, with the same values ​​as the above standards.

[0022] For prefabricated building components, the Zhejiang Provincial Group Standard "Carbon Footprint Accounting and Carbon Label Evaluation Standard for Prefabricated Building Components (Draft for Comments)" is calculated by adding up the carbon emissions from raw material production, raw material transportation, energy use in prefabricated component production, and waste treatment, minus the carbon emission reduction from renewable energy utilization and the carbon emission reduction from recycling waste generated in the production process of prefabricated building components as raw materials for self-use or as external supply of products.

[0023] However, the existing technology has the following limitations: 1) The above method is applicable to the macro-level of industry, organization, and enterprise, and is not suitable for measuring product carbon emissions. With the entire system as the boundary, input-output analysis can be used to reflect the physical relationship between energy and material inputs and outputs. This method requires less data and is highly operational, making it suitable for macro-system analysis (national, departmental, or organizational levels). However, the calculation results can only produce aggregate carbon emissions data, failing to reflect intermediate processes or the source of carbon emissions. Furthermore, because actual factory data management does not separate production and living energy consumption, data collected at the enterprise level is mixed with non-production energy consumption to varying degrees.

[0024] 2) The accounting results cannot reflect the differences in carbon emissions between different prefabricated concrete component products. By dividing the total carbon emissions mentioned above by the total factory output during the corresponding period, the result is the average carbon emissions of concrete components. This is not a problem for some products with a high degree of standardization and small differences between different models. However, prefabricated concrete components are often customized according to project needs. The processing steps and processing workload vary from product to product, resulting in significant differences. If the average is used, it will undoubtedly be significantly different from the actual situation.

[0025] 3) In practice, outsourcing of processing steps can easily lead to incomplete data collection. Research shows that the cost of prefabricated concrete component processing equipment is high, and the scale and type of machinery vary among factories. Some factories have complete prefabrication processes, while others may outsource some of the processes. Therefore, the measurement boundary for carbon emissions from prefabricated concrete components is not equivalent to the physical boundary of the factory. Where outsourced processes are present, data on these outsourced processes must also be traced; otherwise, complete product carbon emissions data cannot be obtained.

[0026] 4) The material consumption caused by the prefabrication process is not taken into account, resulting in embodied carbon emissions. Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the entire life cycle of cast-in-place concrete building RC. Figure 3This is a schematic diagram of the full lifecycle stages of prefabricated concrete buildings (PC). Existing methods consider the materials used to form the concrete components themselves, including the cement and rebar, which fall within stages A1-A3. This differs from the material consumption required for component prefabrication during the A3+ stage. For example, a release agent is applied to the concrete formwork floor to facilitate demolding after the components are formed. Tie wire is used to secure the rebar and prevent it from shifting due to impact during the concrete pouring process. The release agent and ties used in these processes are not raw materials for the components, but rather auxiliary materials for the A3+ component prefabrication process. Therefore, they are not included in the A1-A3 stages, but should be included in the A3+ component prefabrication stage. Existing methods ignore the embodied carbon emissions resulting from this material consumption, leading to an underestimation of carbon emissions during the A3+ stage.

[0027] 5) The characteristics of the prefabricated concrete material itself and the component prefabrication process are not taken into account. At the material level, compared with steel and wood, the injection of CO2 during the concrete mixing process is an important "Carbon Capture, Utilization and Storage (CCUS)" technology that can effectively reduce carbon emissions. The latest research shows that this technology can achieve 45% storage of injected CO2. As the technology matures and the technology of injecting CO2 during concrete mixing is popularized in the future, considering the carbon emission reduction of this process will become a necessary content for the A3+ stage carbon emission calculation, and the existing carbon emission calculation methods do not take this project into account. In addition, unlike the prefabrication of steel and wooden structure components, the production of concrete components needs to rely on formwork molding. At the same time, there are other special features such as concrete material loss. Corresponding methods are needed to include this part of the carbon emission source in the system boundary.

[0028] Based on this, an embodiment of the present invention provides a method for calculating carbon emissions of concrete components, which uses a method based on process analysis (PA) to measure the carbon emissions of prefabricated concrete components (PC components for short) in the factory prefabrication stage. First, the carbon emission-related processing procedures in the prefabrication stage before the PC component products leave the factory are sorted out, and the carbon emissions of each processing procedure are calculated item by item, and then the carbon emissions of the final PC component prefabrication stage are accumulated. It should be noted that, corresponding to ISO 21930, the carbon emissions of general building materials production include three parts: raw material mining (A1), transportation of raw materials to building materials product processing plants (A2), and production of building materials products (A3). A1-A3 are usually referred to as the "cradle to gate" stage. The carbon emission data of this stage are usually used as the factory carbon emission factors of bulk building materials, such as cement, steel bars and other products, and are used as the implicit carbon emissions of building materials in cast-in-place concrete buildings. However, unlike cast-in-place concrete buildings, the carbon emission factor for prefabricated concrete components is not the data for the A1-A3 stages for cement and steel bars. This is because the process of processing bulk raw materials such as cement and steel bars into prefabricated components still involves some production activities that generate carbon emissions. In this embodiment of the present invention, this factory prefabrication stage is referred to as A3+. Figure 4 , Figure 4 This is a schematic diagram of the carbon emission measurement stages in a method for calculating carbon emissions of concrete components provided by the present invention. The sources of carbon emissions in the A3+ stage of PC components mainly come from two parts: one part is the prefabrication process for specific components (including steel bar processing, concrete mixing, mold making and concrete component making), and the other part is the common items in the workshop, mainly the workshop gantry trucks and forklifts that assist in in-plant transportation where the above-mentioned prefabrication process is located; shared lighting systems and scattered electric fans; and necessary mechanical maintenance. Due to the differences in the objective measurement conditions of the two types of data, two calculation methods are used respectively to calculate the carbon emissions of the prefabrication process and the carbon emissions of the common items in the workshop, and then the units are unified and accumulated to obtain the carbon emissions of each concrete component prefabrication stage.

[0029] It should be noted that the calculation unit of carbon emissions during the prefabrication stage of PC components in the embodiment of the present invention should be kilograms of carbon dioxide equivalent per unit (kgCO2e / unit) or kilograms of carbon dioxide equivalent per cubic meter (kgCO2e / m 3 The embodiment of the present invention specifies the calculation unit of carbon emissions of PC components, involving two levels: the calculation unit of carbon emissions (numerator) and the calculation unit of product quantity (denominator).

[0030] For carbon emissions, carbon dioxide equivalent (CO2e) is used as the unit of calculation. The national standard "Building Carbon Emission Calculation Standard" GB / T51366-2019 defines "building carbon emissions" as "the sum of greenhouse gas emissions generated by a building during the production and transportation of building materials, construction and demolition, and operation stages, expressed in carbon dioxide equivalent (CO2e)". Internationally, carbon dioxide equivalent (CO2e) is also generally used as a unified unit of measurement for the overall greenhouse effect of various greenhouse gases. For product calculation units, for the purpose of this invention, two types are provided at the same time: One of the purposes of the present invention is to calculate the carbon emission value for each component individually, so kilograms of carbon dioxide equivalent per unit (kgCO2e / unit) is used as the unit of calculation for the carbon emission of PC components.

[0031] With "m 3 " is used as the denominator. Considering the PC structure industry product market transactions, enterprise output calculations and related carbon emission evaluation and certification standards, it is customary to use cubic meters (m 3 ) calculates the value of PC component transactions, production and use. To facilitate the connection with these application scenarios, kilograms of carbon dioxide equivalent per cubic meter (kgCO2e / m 3 ) as the unit of calculation.

[0032] The two calculation units mentioned above can be converted to each other. For the sake of simplicity, the following only uses kgCO2e / unit as the calculation unit for carbon emissions during the prefabrication stage of PC components.

[0033] Specifically, the embodiment of the present invention first monitors and collects data on the prefabrication process of each concrete component to obtain the energy consumption data, material consumption data, CO2 filling amount, dynamic change data of environmental CO2 concentration and mold usage of each concrete component. Then, based on the dynamic change data of environmental CO2 concentration, the CO2 unorganized escape amount is calculated. Based on the mold usage, the carbon compensation amount of mold material recycling and reuse is calculated. Based on the energy consumption data, material consumption data, CO2 filling amount, CO2 unorganized escape amount and carbon compensation amount, the carbon emissions of each concrete component prefabrication process are calculated. Among them, the prefabrication process includes steel bar processing process, concrete mixing process, mold making process and concrete component making process. Based on the energy consumption data, material consumption data, carbon emission factor, volume of concrete components and the total volume of prefabricated components in the workshop corresponding to each common project in the workshop, the carbon emissions of the common projects in the workshop are calculated. It should be noted that, through field research, it was found that the energy and material consumption of the factory is not only used for the production of PC components, but is often also used for catering, office work and other non-production activities. The embodiment of the present invention defines the calculation boundary within the scope of energy and material consumption related to prefabrication. The consumption caused by other non-production activities should be separated from it and not included in the carbon emissions of PC component prefabrication. The carbon emission calculation boundary defined by the embodiment of the present invention is not the physical boundary of the factory, but it is necessary to fully trace all relevant carbon emission sources of the PC component A3+ stage. Finally, the carbon emissions of the prefabrication process and the carbon emissions of the workshop common projects are added together to obtain the carbon emissions of each concrete component prefabrication process, that is: CE A3+ =PCE A3+ +SCE A3+ ; Where, CE A3+ Indicates the carbon emissions during the prefabrication stage of PC components, kgCO2e / unit; PCE A3+ Indicates the carbon emissions of the PC component prefabrication process, kgCO2e / unit; SCE A3+ Represents the carbon emissions of PC component workshop shared projects, kgCO2e / unit.

[0034] In another preferred embodiment, the step S2 of calculating the amount of unorganized CO2 emission based on the dynamic change data of the ambient CO2 concentration includes: S201, fitting a CO2 concentration-time curve based on the CO2 concentration dynamic change data, and determining the CO2 concentration peak value; S202, determining the CO2 release start time and CO2 decay end time based on the CO2 concentration-time curve and the CO2 concentration peak time; wherein the CO2 release period is from the CO2 release start time to the CO2 concentration peak time, and the CO2 decay period is from the CO2 concentration peak time to the CO2 decay end time; S203, fitting the CO2 decay period of the CO2 concentration-time curve to calculate the CO2 release rate; S204: Calculate the amount of unorganized CO2 dissipation based on the CO2 release rate.

[0035] Specifically, in the embodiment of the present invention, the amount of unorganized CO2 emission should be measured by setting up experimental conditions and using actual measurement methods. When the actual measurement conditions are not available, the supply amount can be used as the emission amount. The unorganized emission of CO2 in the prefabrication stage of concrete components mainly comes from the emission caused by the use of CO2 shielding gas during carbon dioxide gas shielded welding. Since CO2 undergoes a certain high-temperature decomposition around the welding gun, the amount of CO2 emission is not equal to its supply amount. In addition, since the workshop space is open, the escaped CO2 gas is quickly diluted into the surrounding air environment, making it difficult to accurately capture. It is necessary to design and set up reasonable experimental conditions for measurement.

[0036] For example, the method for calculating the amount of CO2 gas emitted during the carbon dioxide gas shielded welding (CO2 gas shielded welding) welding process in the embodiment of the present invention is as follows: 1) Record the CO2 concentration-time numerical points in the experimental operation room Build an enclosed experimental operation room, and arrange a two-way welding machine of the same model as that used in the actual mold manufacturing process in the operation room; A CO2 concentration detection instrument was placed in the operating room to record the air CO2 concentration at a frequency of once per minute. A two-stage welding experiment was carried out in the operating room, and the welding machine current, voltage and gas supply rate were stabilized each time for 30 minutes. Each set of experiments was repeated 3 times to obtain 3 groups of air CO2 concentration-time numerical points in the operating room.

[0037] 2) Synchronize with 1) and record the CO2 concentration-time numerical points outside the operating room 3) Identify the peak CO2 concentration in the operating room The CO2 concentration-time numerical points recorded in 1) were smoothed to obtain the CO2 concentration-time curve of the air in the operating room during the experiment; Based on the above curve, determine the peak CO2 concentration in the operating room air; 4) Identify the start and end of CO2 release 3) Check all three consecutive measurement values ​​before the obtained peak value to show zero or positive change data points, and the earliest point is identified as the release start time; 3) Check that all three consecutive measured values ​​after the obtained peak value show zero or negative changes in data points, and the latest point is identified as the end of decay; Among them, the time between the release start time and the CO2 concentration peak time is identified as the CO2 release period; the time between the CO2 concentration peak time and the decay end time is identified as the CO2 decay period.

[0038] 5) Calculate the CO2 loss rate in the experimental operation room (referring to the CO2 escape rate outside the operation room through the gaps because the operation room cannot be completely closed) The CO2 concentration-time curve was fitted throughout the decay period to determine the CO2 loss rate L during the experimental operation, which was solved by the following first-order mass balance equation: Where C in Indicates the CO2 concentration in the air of the operating room; C out represents the CO2 concentration in the air outside the operating room; P represents the permeability factor of the operating room; A represents the air exchange rate in the operating room; V represents the mixing volume, that is, the volume of the experimental operating room; E represents the CO2 release rate in the operating room.

[0039] During the decay period, E = 0, so the general solution of the above equation is as follows: C in (t)-C in_O =(C in (t d )-C in_O )×exp(-L(tt d )); Where C in (t d ) represents the CO2 concentration in the air of the operating room at the beginning of the decay period; C in_O represents the CO2 concentration of the air entering the operating room from outside the operating room, and takes the average CO2 concentration outside the operating room during the experiment; t represents the current time; t d Indicates the start time of the decay period.

[0040] The loss rate, L, is determined from the slope of a linear fit to the measured data, as shown in the following equation: 6) Calculate CO2 release rate Based on the determination of L in 5), the CO2 release rate is calculated by the following equation: Where E represents the CO2 release rate, which is obtained by linear model fitting, as shown in the following equation: Where m represents the slope determined from the linear model fit; C in(t0) represents the CO2 concentration in the air of the operating room at the beginning of the release period; t0 represents the time when the release period starts.

[0041] 7) Calculate the CO2 gas emission during the second welding process The total CO2 release CE was calculated based on the E value during the 30-min experiment. CO2 ; Weigh the wire consumption FU of the second welding in the corresponding period; Pass CE CO2 The quotient of FU and the unorganized emission of CO2 gas in the second welding process is PCE CO2,we (i.e. the amount of CO2 emitted when welding a unit weight of welding wire).

[0042] In another preferred embodiment, the step S3 of calculating the carbon compensation amount of the mold material recycled and reused based on the mold usage includes: S301, calculating the total carbon reduction from mold material recycling and reuse based on the mold usage, mold material recycling and reuse rate, the carbon emission factor of the original mold material, and the carbon emission factor of the recycled and reused mold material; S302: Multiply the total carbon reduction amount of the recycled and reused mold material by a preset value to obtain a carbon compensation amount of the recycled and reused mold material.

[0043] Specifically, the carbon reduction benefit of mold recycling and reuse in the embodiment of the present invention is calculated as the difference between the carbon emissions of producing the mold with virgin materials and the carbon emissions of producing the mold with recycled materials. The calculation formula is as follows: Where, PCE mo,RE Indicates the total carbon reduction from mold material recycling (kgCO2); W mo,i Indicates the usage of the mold (unit is t or m 3 );r i Represents the recycling rate of the i-th type mold material (%); CEF m,i represents the carbon emission factor of the i-th type of virgin mold material (kgCO2 / unit); CEF mr,i It represents the carbon emission factor (kgCO2 / unit) of the i-th type of recycled and reused mold materials.

[0044] Then, the total carbon reduction from mold material recycling and reuse is multiplied by the preset value to obtain the carbon compensation amount from mold material recycling and reuse. The calculation formula is as follows: PCE mo,re =PCE mo,RE ×a%; Where, PCE mo,reIndicates the carbon compensation amount of mold material recycling and reuse; a% represents the preset value.

[0045] For example, the carbon offset amount of the mold material recycling and reuse is calculated as 50% of the total carbon reduction amount of the mold material recycling and reuse, that is: PCE mo，re =PCE mo，RE ×50%; It should be noted that regarding "carbon offsets outside the system boundary", since mold material recycling and reuse occurs between the previous and next mold life cycles, a question arises: to whom should the carbon reduction benefits be allocated? Should they be credited to the previous life cycle in which these used mold materials were generated, or to the subsequent life cycle in which these materials are recycled and reused? Please refer to Figure 5 , Figure 5 This is a schematic diagram of the carbon offset data allocation for mold material recycling and reuse in a concrete component carbon emission calculation method provided by the present invention. The World Resources Institute (WRI) and the World Business Council for Sustainable Development (WBCSD) have proposed two methods, one of which is called the "Producer Benefit Method" (WRI 100-0 ), deducting the embodied carbon emissions of recycled materials in the previous life cycle; the opposite approach is called the "recycler benefit approach" (WRI 0-100 ), deducted in the next life cycle. The embodiment of the present invention adopts a compromise solution, which is equally distributed in the first and second life cycles, so only 50% is counted to the boundary of the component system.

[0046] In another preferred embodiment, the carbon emissions of the prefabrication process include the carbon emissions of the prefabrication process of the factory and the carbon emissions of the prefabrication process of the outsourced factory, and the carbon emissions of the workshop shared projects include the carbon emissions of the workshop shared projects of the factory and the carbon emissions of the workshop shared projects of the outsourced factory.

[0047] Specifically, the embodiment of the present invention mainly takes into account the objective conditions of each factory, such as the scale and type of machinery. Some factories have complete prefabrication processes, while others may have some processes outsourced. For the latter, carbon emissions calculation cannot be carried out only in the factory, and the data of the outsourced processes should also be traced back. Otherwise, it is impossible to obtain complete A3+ stage data. Therefore, in the embodiment of the present invention, whether it is the carbon emissions of the prefabrication process or the carbon emissions of the workshop shared project, in addition to calculating the carbon emissions of the factory, the carbon emissions of the outsourced factory should also be calculated. Only in this way can the relevant carbon emission sources of the concrete component A3+ stage be fully traced to ensure the accuracy of the carbon emission calculation of the concrete component.

[0048] It should be noted that in the embodiment of the present invention, the carbon emissions of the prefabrication process of the factory and the carbon emissions of the prefabrication process of the outsourced factory are calculated using the same method; the carbon emissions of the shared projects of the factory workshop and the carbon emissions of the shared projects of the outsourced factory workshop are calculated using the same method.

[0049] In another preferred embodiment, the prefabrication process includes a steel bar processing process, a concrete mixing process, a mold making process, and a concrete component making process. Then, S4, calculating the carbon emissions of each concrete component prefabrication process based on the energy consumption data, the material consumption data, the CO2 injection amount, the CO2 fugitive emission amount, and the carbon compensation amount, includes: S401, determining at least one processing step of the steel bar processing process and a functional unit corresponding to each processing step; wherein the functional unit is a basic unit for calculating carbon emissions of the corresponding processing step; S402, calculating the carbon emissions of the steel bar processing process based on the number of functional units, energy consumption data, material consumption data, and carbon emission factors corresponding to each processing process; S403, determining at least one processing step of the concrete mixing process and the functional unit corresponding to each processing step; S404, calculating the carbon emissions of the concrete mixing process based on the number of functional units corresponding to each processing step, energy consumption data, carbon emission factor, and the CO2 injection amount; S405, determining at least one processing step of the mold manufacturing process and a functional unit corresponding to each processing step; S406, calculating the carbon emissions of the mold manufacturing process based on the number of functional units, energy consumption data, material consumption data, carbon emission factors, the CO2 fugitive emission amount, and the carbon compensation amount corresponding to each processing step; S407, determining at least one processing step of the concrete component manufacturing process and a functional unit corresponding to each processing step; S408, calculating the carbon emissions of the concrete component manufacturing process based on the number of functional units, energy consumption data, material consumption data, and CO2 injection amount corresponding to each processing step; S409: Add the carbon emissions of the steel bar processing process, the carbon emissions of the concrete mixing process, the carbon emissions of the mold making process, and the carbon emissions of the concrete component making process to obtain the carbon emissions of each concrete component prefabrication process.

[0050] Specifically, the concrete component prefabrication process in the embodiment of the present invention includes four parts, namely, the steel bar processing process, the concrete mixing process, the mold making process, and the concrete component making process. For example, each prefabrication process includes the following typical processing steps: 1) Steel bar processing process: including 5 processes of steel bar straightening and cutting, steel bar bending and hoop, truss welding, mesh welding and mesh binding.

[0051] 2) Concrete mixing process: includes two processes: concrete mixing and torpedo tank transportation.

[0052] 3) Mold production process: 5 processes including mold plate production, plate cutting, mold welding, mold bolt connection, and mold material recycling.

[0053] 4) Concrete component production process: This includes pre-production work, material distribution, and hoisting and stacking. Pre-production work includes five steps: cleaning the base formwork, marking, installing the formwork, applying glue, and spraying release oil. Material distribution includes five steps: placing the anti-fouling tripod, connecting the materials, distributing the materials, vibrating, and roughening. Hoisting and stacking includes three steps: removing the side formwork, transporting, and curing. Curing is divided into natural curing and steam curing.

[0054] For the A3+ stage of PC components, the embodiment of the present invention proposes a carbon emission measurement method based on the prefabrication process function unit (FU) as the basic unit. FU is a unit of measurement that represents the workload of the prefabrication process of PC components in the factory (i.e., prefabrication process activity data). For example, the workload of straightening steel bars is represented by the length of the steel bar (m), so 1m of steel bar is regarded as 1 FU of the straightening process; concrete mixing is represented by the concrete volume (m 3 ) characterizes the amount of stirring work, so 1m 3 Concrete is used as 1 FU in the concrete mixing process, and so on.

[0055] 1) Determine at least one processing step of the steel bar processing process and the functional unit corresponding to each processing step, as shown in Table 1 below.

[0056] Table 1 Rebar processing procedures, functional units, carbon emission sources and carbon emission reduction projects Among them, carbon emission sources include energy consumption and material consumption. For the carbon emission sources of the above processes, the following calculation method is adopted: Where, PCE s Represents the carbon emissions of steel bar processing, kgCO2e / piece; PCE s,i represents the carbon emission of the i-th processing step of steel bar processing, kgCO2e / FU; PAD s,iRepresents the workload (i.e., activity data) of the i-th processing step of steel bar processing, FU / piece; PADe s,i.j Indicates the energy consumption of the jth type of steel bar processing step i, kg / FU, L / FU or kWh / FU; PADm s,i.j Indicates the consumption of the jth material in the i-th processing step of steel bar processing, kg / FU or t / FU; CEFe j represents the carbon emission factor of the jth energy source, kgCO2e / kg, kgCO2e / L or kgCO2e / kWh; CEFm j Represents the carbon emission factor of the jth material, kgCO2e / kg or kgCO2e / t.

[0057] 2) Determine at least one processing step of the concrete mixing process and the functional unit corresponding to each processing step, as shown in Table 2 below.

[0058] Table 2 Concrete mixing process processing steps, functional units, carbon emission sources and carbon emission reduction projects Among them, carbon emission sources include energy consumption, while the injection of CO2 during the concrete mixing process can seal a certain amount of CO2, achieving carbon emission reduction. For the carbon emission sources and carbon emission reduction projects in the above process, the following calculation method is adopted: Where, PCE c Indicates the carbon emissions of the concrete mixing process, kgCO2e / unit; PCE c,i represents the carbon emission of the concrete mixing process i, kgCO2e / FU; PAD c,i represents the workload (i.e., activity data) of the concrete mixing process, FU / piece; PADe c,i.j represents the energy consumption of the jth type of concrete mixing process in kg / FU, L / FU or kWh / FU; CEFe j represents the carbon emission factor of the jth energy source, kgCO2e / kg, kgCO2e / L or kgCO2e / kWh; PCE CO2,c Indicates the CO2 gas filling amount in the concrete mixing process, kg / FU, which can be read from the CO2 gas filling dial of the mixing station.

[0059] 3) Determine at least one processing step of the mold manufacturing process and the functional unit corresponding to each processing step, as shown in Table 3 below.

[0060] Table 3 Mould manufacturing process, processing steps, functional units, carbon emission sources and carbon emission reduction projects Among them, carbon emission sources include energy consumption, material consumption, and the unorganized emission of CO2 shielding gas during the second welding process. The recycling and reuse of molds after use can be calculated based on a certain carbon compensation amount. For the carbon emission sources and carbon emission reduction projects in the above processes, the following calculation method is adopted: Where, PCE mo Indicates the carbon emissions of the mold manufacturing process, kgCO2e / piece; PCE mo,i represents the carbon emissions of the i-th processing step in mold making, kgCO2e / FU; PAD mo,i Represents the workload (i.e., activity data) of the i-th processing step in mold making, FU / piece; PADe mo,i.j Indicates the energy consumption of the jth type in the i-th processing step of mold making, kg / FU, L / FU or kWh / FU; PADm mo,i.j Indicates the consumption of the jth material in the i-th processing step of mold making, kg / FU or t / FU; CEFe j represents the carbon emission factor of the jth energy source, kgCO2e / kg, kgCO2e / L or kgCO2e / kWh; CEFm j Indicates the carbon emission factor of the jth material, kgCO2e / kg or kgCO2e / t; PCE CO2,we Indicates the unorganized emission of CO2 gas during the mold welding process, kg / FU; PCE mo,re Indicates the carbon compensation amount of mold material recycling and reuse, kg / FU.

[0061] 4) Determine at least one processing step in the concrete component manufacturing process and the functional unit corresponding to each processing step, as shown in Table 4 below.

[0062] Table 4 Processing procedures, functional units, carbon emission sources and carbon reduction projects of PC component manufacturing modules Among them, carbon emission sources include energy consumption and material consumption. For the carbon emission sources of the above processes, the following calculation method is adopted: Where, PCE p Indicates the carbon emissions of the PC component manufacturing process, kgCO2e / unit; PCE p,i represents the carbon emissions of the i-th processing step in the production of PC components, kgCO2e / FU; PAD p,i It represents the workload (i.e., activity data) of the i-th processing step in PC component manufacturing, FU / piece; PADe p,i.jPADm represents the energy consumption of the jth process in the i-th process of PC component production, kg / FU, L / FU or kWh / FU; p,i.j Indicates the consumption of the jth material in the i-th processing step of PC component production, kg / FU or t / FU; CEFe j represents the carbon emission factor of the jth energy source, kgCO2e / kg, kgCO2e / L or kgCO2e / kWh; CEFm j Represents the carbon emission factor of the jth material, kgCO2e / kg or kgCO2e / t.

[0063] Finally, the carbon emissions PCE of the steel bar processing process s , Carbon emissions PCE of concrete mixing process c , Carbon emissions PCE of mold manufacturing process mo and the carbon emissions PCE of the concrete component production process p Adding them together, we can get the carbon emissions of each concrete component prefabrication process. The calculation formula is as follows: PCE A3+ =PCE s +PCE c +PCE mo +PCE p ; Where, PCE s 、PCE c 、PCE mo 、PCE p Respectively represent the carbon emissions of steel bar processing, concrete mixing, mold making and PC component manufacturing module processes, kgCO2e / unit.

[0064] It's important to note that the shared energy consumption in the concrete component prefabrication process is calculated based on the total energy consumption of the workshop and allocated to each component using accounting rules. Field research has revealed that in addition to the aforementioned process carbon emission sources, actual factories also have other shared energy sources. These include: forklifts, which consume diesel for intra-plant transportation; gantry trucks, which consume electricity for intra-plant transportation; lighting systems, which consume electricity; scattered electric fans, which consume electricity; and necessary mechanical maintenance, which consumes hydraulic, cooling, and gear oil. The energy consumption of these shared machinery can be measured in total over a specific period, but cannot be directly quantified for individual components.

[0065] The embodiment of the present invention provides a distribution scheme for these data. For forklift transportation, in the national standard "Building Carbon Emission Calculation Standard" GB / T 51366-2019, the carbon emissions of building material transportation are the product of the weight of building materials, transportation distance and transportation mode carbon emission factor. That is, it is believed that when the means of transportation and transportation distance are constant, the transportation carbon emissions are directly proportional to the weight of building materials. Therefore, for PC component production, the total fuel consumption data of the workshop can be obtained through the oil gauge or refueling records for a certain period of time, and then allocated to the components according to the calculation rules. Assuming that all components have traveled the same distance from entering the factory, passing through the assembly line operation, and finally leaving the factory, then referring to the calculation method of carbon emissions from building material transportation, it is believed that the fuel consumption of component transportation is proportional to the weight of the component, then: Similarly, assuming the same lighting requirements, the amount of fans required to maintain worker thermal comfort, and mechanical maintenance during PC component processing, the energy and material consumption for in-plant transportation, compressed air, lighting, fan systems, and mechanical maintenance can be assumed to be proportional to the weight of the PC components. Assuming the apparent density of PC components is essentially constant, these consumptions can also be assumed to be proportional to the component volume. Therefore, the total volume of PC components can be measured and allocated to each component according to the following rules.

[0066] Where, SCE A3+ Indicates the carbon emissions of workshop shared projects, kgCO2e / unit; SCE i represents the carbon emissions of the i-th common project in the workshop during the measurement period, kgCO2e; v represents the volume of the measured PC component, m 3 ; V represents the total volume of PC components in the workshop during the measurement period, m 3 ;SADe i,a Indicates the energy consumption of the ath type of the i-th common project in the workshop, kg, L or kWh; SADm j,b Indicates the consumption of the bth type of material in the jth common project of the workshop, kg or L; CEFe a Indicates the carbon emission factor of the a-type energy, kgCO2e / kg, kgCO2e / L or kgCO2e / kWh; CEFm b Indicates the carbon emission factor of type b material, kgCO2e / kg or kgCO2e / L.

[0067] It should be noted that on-site data collection in the workshop includes energy and material consumption and unorganized CO2 emissions. Energy is categorized as fossil energy and electricity consumption, while materials are categorized by their form: solid, liquid, and gaseous. Fossil energy consumption should be measured on-site using appropriate equipment by weight, volume, or capacity. Electricity consumption should be measured by real-time monitoring of voltage and current using a tiered electrical box on-site, with active power integration used to calculate power consumption. Solid material consumption should be measured on-site using appropriate equipment by weight or volume. Liquid and gaseous material consumption should be measured on-site using appropriate equipment by weight or volume. For carbon emissions measurement in prefabrication processes, the sample size should not be less than 30 groups, and the p-value of the fitting result between process carbon emissions and functional unit data should not be higher than 0.05. For carbon emissions measurement of shared items in the workshop, the measurement cycle should not be shorter than one year and should not be shorter than one month.

[0068] The measurement error of material measuring instruments and equipment should not exceed ±0.1% of the total measurement volume.

[0069] The measurement accuracy level of energy-related measuring instruments and equipment shall comply with the relevant provisions of the current national standard GB / T 17167 "General Rules for the Equipment and Management of Energy Metering Instruments in Energy-consuming Units", as shown in Table 5 below.

[0070] Table 5 "Accuracy requirements for energy measuring instruments for energy-consuming units" as specified in GB / T 17167

[0071] It should be noted that the energy and material consumption data collected on-site need to be converted into carbon emission data using the corresponding carbon emission factors. Therefore, regarding the values ​​of energy and material carbon emission factors: the carbon emission factors of fossil energy should be determined in accordance with the current national standard "Building Carbon Emission Calculation Standard" GB / T 51366. The carbon emission factor of electricity should preferably use the latest provincial average carbon emission factor of electricity published by the local administrative department. When there is no provincial data, the latest regional average carbon emission factor of electricity published by the Ministry of Ecology and Environment can be used. When there is no regional data, the latest national average carbon emission factor of electricity published by the Ministry of Ecology and Environment can be used. The carbon emission factor of basic materials should use data audited by a third party. When no third party provides it, the updated carbon emission database can be used.

[0072] It's important to note that assigning a unique carbon emission factor to each component requires differentiating the carbon emissions of different components. This carbon emission value depends on the production process and is affected by the process. While the commonly used input-output (IO) method cannot achieve this, the proposed measurement method, based on process analysis (PA), can distinguish the differences in carbon emissions between components by measuring process data from each component's production phase.

[0073] Furthermore, due to the varying scale, machinery types, and other factors of PC component production plants, some factories maintain complete prefabrication processes, while others may outsource some. For the latter, carbon emissions measurement must not be conducted solely within the factory; data from these outsourced processes must also be traced. Otherwise, complete A3+ data cannot be obtained. A process-based measurement approach facilitates the identification of the processes requiring tracing and allows for targeted data collection.

[0074] The embodiment of the present invention uses the process as the measurement unit and can collect data without affecting the normal production of concrete components. This means that it is not necessary to conduct a separate experiment and cannot assume that only the test object is being produced on the production line. It is necessary to consider the reality that continuous production makes it difficult to separate the data between different components.

[0075] See also Figure 6 , Figure 6 This is a schematic diagram of prefabricated carbon emissions measurement in existing technology. The conventional approach is to track the complete flow of a single component from its entry to exit from the workshop. This is the ideal measurement and accounting method, and the data obtained from full tracking is the most reliable. However, it is rarely feasible for the following reasons: 1. Some factory processes are outsourced, making it impossible to track complete data in a single workshop; 2. In actual production, many processes are not processed one by one. On assembly lines or in large-scale equipment, many components are processed together in a batch, making it impossible to distinguish between them without stopping production of other components.

[0076] See also Figure 7 , Figure 7 This is a schematic diagram of carbon emission measurement of the prefabrication process in a method for calculating carbon emission of concrete components provided by the present invention. The measurement idea proposed by the present invention is to fit the carbon emission parameters of the process by tracking the production process and testing sufficient samples. First, determine the appropriate unit of representation of the process workload - functional unit FU. For example, the FU of concrete mixing is volume (m 3 ); then conduct multiple carbon emission tests on the process, complete the process FU carbon emission quota, and then calculate the component carbon emission based on this; for example, composite panels, balconies, bay windows, different types of PC components, different volumes, but the solution provided by the present invention only measures the stirring of 1m 3 The carbon emissions generated by concrete are used to obtain the process carbon emission parameters, and then the carbon emissions of concrete mixing in each of the above PC components are calculated.

[0077] In another preferred embodiment, the method further comprises: The carbon emissions of each concrete component prefabrication process, the carbon emissions of the prefabrication process, the carbon emissions of the workshop common projects, and the process analysis list are stored in layers; wherein, the process analysis list includes data on various energy sources, material consumption, CO2 injection volume, CO2 unorganized emission volume, carbon compensation volume, and corresponding carbon emission factor data.

[0078] For details, please refer to Figure 8 , Figure 8 This is a schematic diagram of the hierarchical storage of calculation data in a method for calculating carbon emissions of concrete components provided by the present invention. In the embodiment of the present invention, the carbon emission measurement results of the prefabrication stage of PC components are calculated according to Figure 8 stratified storage, including total carbon emissions (CE A3+ ), carbon emissions sub-item (PCE A3+ and SCE A3+ ), and the process analysis (PA) list. Each layer is linked through the corresponding formulas above and ultimately connected to the PA list. The PA list consists of data on energy, material consumption, CO2 charge, CO2 fugitive emissions, carbon offset and corresponding carbon emission factors, CO2 charge, and mold recycling and reuse.

[0079] It should be noted that this data structure is convenient for CE A3+ Update in time to make CE A3+ The measurement results represent the actual situation. On the one hand, local updates can be made according to the changes in local processes. For example, in a certain year, a CE A3+甲,A The following year, Factory A changed a process so that it could use fewer PADs to complete the 1FU process. e,a , or the equipment of the processing plant is broken, and the processing is entrusted to Factory B. Factory B needs more PAD to complete the 1FU process. e,a In this case, the measurement scheme proposed by the present invention allows data update for this process alone to obtain the CE of component A that represents the actual situation. A3+ On the other hand, the relevant measurement results associated with the database can be updated in a timely manner according to the changes in the carbon emission factors of energy and basic materials. For example, as the national grid gradually decarbonizes, the carbon emission factor of electricity decreases year by year, or when the test results in a certain province are migrated to another province, due to the differences between provincial electricity carbon emission factors, in these scenarios, the latest local electricity CEF published by the Ministry of Ecology and Environment and other competent departments can be used. e Data can be updated without the need to perform a complete re-measurement.

[0080] Correspondingly, the present invention also provides a concrete component carbon emission calculation device, which can implement all the processes of the concrete component carbon emission calculation method in the above embodiment.

[0081] See also Figure 9 , Figure 9 The figure is a schematic diagram of a preferred embodiment of a concrete component carbon emission calculation device provided by the present invention. The concrete component carbon emission calculation device comprises: The data acquisition module 901 is used to monitor and collect data on the prefabrication process of each concrete component to obtain energy consumption data, material consumption data, CO2 charging amount, dynamic change data of ambient CO2 concentration, and mold usage of each concrete component; The emission calculation module 902 is used to calculate the CO2 fugitive emission amount based on the dynamic change data of the ambient CO2 concentration; the carbon compensation calculation module 903 is used to calculate the carbon compensation amount of the mold material recycling and reuse based on the mold usage; the process carbon emission calculation module 904 is used to calculate the carbon emission of each concrete component prefabrication process based on the energy consumption data, the material consumption data, the CO2 charging amount, the CO2 fugitive emission amount and the carbon compensation amount; the shared carbon emission calculation module 905 is used to calculate the carbon emission of the shared projects of the workshop based on the energy consumption data, material consumption data, carbon emission factor, volume of the concrete component and the total volume of prefabricated components in the workshop corresponding to each shared project of the workshop; The component carbon emission calculation module 906 is used to add the carbon emission of the prefabrication process and the carbon emission of the workshop common project to obtain the carbon emission of each concrete component prefabrication process.

[0082] Preferably, the dissipation amount calculation module 902 is specifically configured to: According to the CO2 concentration dynamic change data, a CO2 concentration-time curve is fitted and a CO2 concentration peak is determined; according to the CO2 concentration-time curve and the CO2 concentration peak, the CO2 release start time and the CO2 decay end time are determined; wherein, the CO2 release period is from the CO2 release start time to the CO2 concentration peak time, and the CO2 decay period is from the CO2 concentration peak time to the CO2 decay end time; Fitting the CO2 decay period of the CO2 concentration-time curve to calculate the CO2 release rate; According to the CO2 release rate, the amount of CO2 unorganized escape is calculated.

[0083] Preferably, the carbon compensation amount calculation module 903 is specifically used to: Calculate the total carbon reduction from mold material recycling and reuse based on the mold usage, mold material recycling and reuse rate, carbon emission factor of virgin mold material, and carbon emission factor of recycled and reused mold material; The total carbon reduction amount of the recycled and reused mold material is multiplied by a preset value to obtain the carbon compensation amount of the recycled and reused mold material.

[0084] Preferably, the carbon emissions of the prefabrication process include the carbon emissions of the prefabrication process of the factory and the carbon emissions of the prefabrication process of the outsourced factory, and the carbon emissions of the workshop shared projects include the carbon emissions of the workshop shared projects of the factory and the carbon emissions of the workshop shared projects of the outsourced factory.

[0085] Preferably, the prefabrication process includes a steel bar processing process, a concrete mixing process, a mold making process, and a concrete component making process. The process carbon emission calculation module 904 is specifically used to: Determine at least one processing step of the steel bar processing process and a functional unit corresponding to each processing step; wherein the functional unit is a basic unit for calculating the carbon emissions of the corresponding processing step; Calculate the carbon emissions of the steel bar processing process based on the number of functional units, energy consumption data, material consumption data, and carbon emission factors corresponding to each processing process; Determining at least one processing step of the concrete mixing process and a functional unit corresponding to each processing step; Calculate the carbon emissions of the concrete mixing process based on the number of functional units, energy consumption data, carbon emission factors, and CO2 injection volume corresponding to each processing step; Determine at least one processing step of the mold manufacturing process and a functional unit corresponding to each processing step; Calculate the carbon emissions of the mold manufacturing process based on the number of functional units, energy consumption data, material consumption data, carbon emission factors, the amount of unorganized CO2 emissions, and the carbon compensation amount corresponding to each processing step; Determining at least one processing step of the concrete component manufacturing process and a functional unit corresponding to each processing step; Calculate the carbon emissions of the concrete component manufacturing process based on the number of functional units, energy consumption data, material consumption data, and CO2 injection amount corresponding to each processing step; The carbon emissions of the steel bar processing process, the carbon emissions of the concrete mixing process, the carbon emissions of the mold making process, and the carbon emissions of the concrete component making process are added together to obtain the carbon emissions of each concrete component prefabrication process.

[0086] Preferably, the device further comprises: The data storage module is used to store the carbon emissions of each concrete component prefabrication process, the carbon emissions of the prefabrication process, the carbon emissions of the workshop common projects, and a process analysis list in a hierarchical manner; wherein the process analysis list includes data on various energy sources, material consumption, CO2 injection volume, CO2 unorganized emission volume, carbon compensation volume, and corresponding carbon emission factors.

[0087] In specific implementation, the working principle, control process and technical effects achieved by the concrete component carbon emission calculation device provided in the embodiment of the present invention are the same as those of the concrete component carbon emission calculation method in the above embodiment, and will not be repeated here.

[0088] See also Figure 10 , Figure 10 1 is a schematic diagram of a preferred embodiment of a terminal device provided by the present invention. The terminal device includes a processor 1001, a memory 1002, and a computer program stored in the memory 1002 and configured to be executed by the processor 1001. When the processor 1001 executes the computer program, it implements the method for calculating carbon emissions of concrete components described in any of the above embodiments.

[0089] Preferably, the computer program can be divided into one or more modules / units (e.g., computer program 1, computer program 2, ...), which are stored in the memory 1002 and executed by the processor 1001 to implement the present invention. The one or more modules / units can be a series of computer program instruction segments capable of performing specific functions, and the instruction segments are used to describe the execution process of the computer program in the terminal device.

[0090] The processor 1001 can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor, or the processor 1001 can be any conventional processor. The processor 1001 is the control center of the terminal device, and various parts of the terminal device are connected using various interfaces and lines.

[0091] The memory 1002 mainly includes a program storage area and a data storage area. The program storage area can store an operating system, at least one application required for a function, and the data storage area can store related data. In addition, the memory 1002 can be a high-speed random access memory or a non-volatile memory, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, and a Flash Card. Alternatively, the memory 1002 can be other volatile solid-state memory devices.

[0092] It should be noted that the above terminal device may include, but is not limited to, a processor and a memory. Those skilled in the art will understand that Figure 10 The structural diagram is only an example of the above-mentioned terminal device and does not constitute a limitation on the above-mentioned terminal device. It may include more or fewer components than shown in the figure, or combine certain components, or different components.

[0093] An embodiment of the present invention further provides a computer-readable storage medium, which includes a stored computer program. When the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the method for calculating carbon emissions of concrete components described in any of the above embodiments.

[0094] An embodiment of the present invention further provides a computer program product, which includes a computer program or computer instructions. When the computer program or computer instructions are executed by a processor, the method for calculating carbon emissions of concrete components described in any of the above embodiments is implemented.

[0095] An embodiment of the present invention provides a method, device, equipment, medium and product for calculating carbon emissions of concrete components. The method monitors and collects data on the prefabrication process of each concrete component to obtain energy consumption data, material consumption data, CO2 charging amount, dynamic change data of environmental CO2 concentration and mold usage of each concrete component; calculates the CO2 fugitive emission amount based on the dynamic change data of environmental CO2 concentration; calculates the carbon compensation amount of mold material recycling and reuse based on the mold usage; calculates the carbon emissions of each concrete component prefabrication process based on the energy consumption data, the material consumption data, the CO2 charging amount, the CO2 fugitive emission amount and the carbon compensation amount; calculates the carbon emissions of the common projects in the workshop based on the energy consumption data, material consumption data, carbon emission factor corresponding to each common project in the workshop, the volume of the concrete component and the total volume of prefabricated components in the workshop; and adds the carbon emissions of the prefabrication process and the carbon emissions of the common projects in the workshop to obtain the carbon emissions of each concrete component prefabrication process. The embodiment of the present invention takes into account all energy and material consumption generated by the prefabrication of concrete components, the carbon emissions of workshop shared projects, the carbon emissions caused by unorganized CO2 emission, and the carbon emission reduction during the prefabrication process, thereby effectively improving the accuracy of the carbon emission calculation of concrete components.

[0096] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for calculating carbon emissions of concrete components, characterized in that: include: Monitor and collect data on the prefabrication process of each concrete component to obtain energy consumption data, material consumption data, CO2 injection volume, dynamic change data of ambient CO2 concentration, and mold usage of each concrete component; Calculating the amount of unorganized CO2 emission based on the dynamic change data of the ambient CO2 concentration; Calculating the carbon compensation amount of the mold material recycling and reuse based on the mold usage; Calculate the carbon emissions of each concrete component prefabrication process based on the energy consumption data, the material consumption data, the CO2 injection amount, the CO2 fugitive emission amount, and the carbon compensation amount; Calculate the carbon emissions of each common project in the workshop based on the energy consumption data, material consumption data, carbon emission factor, volume of the concrete components, and the total volume of prefabricated components in the workshop; The carbon emissions of the prefabrication process and the carbon emissions of the workshop common projects are added together to obtain the carbon emissions of each concrete component prefabrication process.

2. The method for calculating carbon emissions of concrete components according to claim 1, wherein: Calculating the amount of unorganized CO2 emission based on the dynamic change data of the ambient CO2 concentration includes: According to the CO2 concentration dynamic change data, a CO2 concentration-time curve is fitted and a CO2 concentration peak is determined; according to the CO2 concentration-time curve and the CO2 concentration peak, the CO2 release start time and the CO2 decay end time are determined; wherein, the CO2 release period is from the CO2 release start time to the CO2 concentration peak time, and the CO2 decay period is from the CO2 concentration peak time to the CO2 decay end time; Fitting the CO2 decay period of the CO2 concentration-time curve to calculate the CO2 release rate; According to the CO2 release rate, the amount of CO2 unorganized escape is calculated.

3. The method for calculating carbon emissions of concrete components according to claim 1, wherein: Calculating the carbon compensation amount of mold material recycling and reuse based on the mold usage includes: Calculate the total carbon reduction from mold material recycling and reuse based on the mold usage, mold material recycling and reuse rate, carbon emission factor of virgin mold material, and carbon emission factor of recycled and reused mold material; The total carbon reduction amount of the recycled and reused mold material is multiplied by a preset value to obtain the carbon compensation amount of the recycled and reused mold material.

4. The method for calculating carbon emissions of concrete components according to claim 1, wherein: The carbon emissions of the prefabrication process include the carbon emissions of the prefabrication process of this factory and the carbon emissions of the prefabrication process of the outsourced factory, and the carbon emissions of the workshop shared projects include the carbon emissions of the workshop shared projects of this factory and the carbon emissions of the workshop shared projects of the outsourced factory.

5. The method for calculating carbon emissions of concrete components according to claim 4, wherein: The prefabrication process includes a steel bar processing process, a concrete mixing process, a mold making process, and a concrete component making process. Calculating the carbon emissions of each concrete component prefabrication process based on the energy consumption data, the material consumption data, the CO2 injection amount, the CO2 fugitive emission amount, and the carbon compensation amount includes: Determine at least one processing step of the steel bar processing process and a functional unit corresponding to each processing step; wherein the functional unit is a basic unit for calculating the carbon emissions of the corresponding processing step; Calculate the carbon emissions of the steel bar processing process based on the number of functional units, energy consumption data, material consumption data, and carbon emission factors corresponding to each processing process; Determining at least one processing step of the concrete mixing process and a functional unit corresponding to each processing step; Calculate the carbon emissions of the concrete mixing process based on the number of functional units, energy consumption data, carbon emission factors, and CO2 injection volume corresponding to each processing step; Determine at least one processing step of the mold manufacturing process and a functional unit corresponding to each processing step; Calculate the carbon emissions of the mold manufacturing process based on the number of functional units, energy consumption data, material consumption data, carbon emission factors, the amount of unorganized CO2 emissions, and the carbon compensation amount corresponding to each processing step; Determining at least one processing step of the concrete component manufacturing process and a functional unit corresponding to each processing step; Calculate the carbon emissions of the concrete component manufacturing process based on the number of functional units, energy consumption data, material consumption data, and CO2 injection amount corresponding to each processing step; The carbon emissions of the steel bar processing process, the carbon emissions of the concrete mixing process, the carbon emissions of the mold making process, and the carbon emissions of the concrete component making process are added together to obtain the carbon emissions of each concrete component prefabrication process.

6. The method for calculating carbon emissions of concrete components according to claim 5, wherein: The method further comprises: The carbon emissions of each concrete component prefabrication process, the carbon emissions of the prefabrication process, the carbon emissions of the workshop common projects, and the process analysis list are stored in layers; wherein, the process analysis list includes data on various energy sources, material consumption, CO2 injection volume, CO2 unorganized emission volume, carbon compensation volume, and corresponding carbon emission factor data.

7. A device for calculating carbon emissions of concrete components, characterized in that: include: A data acquisition module is used to monitor and collect data on the prefabrication process of each concrete component to obtain energy consumption data, material consumption data, CO2 charging volume, dynamic change data of ambient CO2 concentration, and mold usage of each concrete component; The emission calculation module is used to calculate the unorganized emission of CO2 based on the dynamic change data of the ambient CO2 concentration; A carbon compensation amount calculation module, used to calculate the carbon compensation amount of mold material recycling and reuse based on the mold usage; a process carbon emission calculation module, configured to calculate the carbon emission of each concrete component prefabrication process based on the energy consumption data, the material consumption data, the CO2 injection amount, the CO2 fugitive emission amount, and the carbon compensation amount; a shared carbon emission calculation module, configured to calculate the carbon emissions of the shared items in the workshop based on the energy consumption data, material consumption data, carbon emission factors, the volume of the concrete components, and the total volume of prefabricated components in the workshop corresponding to each shared item in the workshop; The component carbon emission calculation module is used to add the carbon emission of the prefabrication process and the carbon emission of the workshop common project to obtain the carbon emission of each concrete component prefabrication process.

8. A terminal device, characterized in that: The method comprises a processor and a memory, wherein a computer program is stored in the memory and configured to be executed by the processor, and wherein the method for calculating carbon emissions of a concrete component according to any one of claims 1 to 6 is implemented when the processor executes the computer program.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, wherein when the device where the computer-readable storage medium is located executes the computer program, the method for calculating carbon emissions of concrete components according to any one of claims 1 to 6 is implemented.

10. A computer program product, characterized in that The computer program product includes a computer program or computer instructions, and when the computer program or the computer instructions are executed by a processor, the method for calculating carbon emissions of concrete components according to any one of claims 1 to 6 is implemented.

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