Carbon emission accounting method and system based on turnover materials in the building construction stage

Abstract

The present invention relates to the field of carbon emission accounting technology, solves the technical problem that the recycling rate and turnover times of turnover materials are not considered in the prior art, resulting in incomplete carbon emission calculation and low accuracy of calculation results, and particularly relates to a carbon emission accounting method based on turnover materials in the building construction stage, comprising the following steps: obtaining relevant data of turnover materials; determining the functional unit and target range of carbon emission accounting of turnover materials in the building construction stage; obtaining relevant parameters of carbon emission accounting of turnover materials in each stage within the target range; and calculating the carbon emission of turnover materials in the building construction stage according to the relevant parameters of carbon emission accounting of turnover materials in each stage within the target range. The present invention recycles and reuses turnover materials according to their own characteristics, and performs comprehensive and effective calculations on the carbon emissions of turnover materials in the building construction stage, thereby improving the integrity and accuracy of carbon emission calculations in the building construction stage.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon emission accounting, and in particular to a carbon emission accounting method and system based on turnover materials in the construction stage of a building. Background Art

[0002] In recent years, my country's rapid urbanization has driven the sustained development of the construction industry. The scale of urban construction industry has continued to expand, greenhouse gas emissions have continued to grow, and the construction industry is under tremendous pressure to reduce carbon emissions. At present, the simplest method for calculating carbon emissions is the IPCC method. You only need to know the emission factor and then use the formula "carbon emissions = activity data × emission factor" to directly calculate carbon emissions. However, due to differences in production processes, geographical distribution and technical levels, the accuracy of carbon emission calculation results is relatively low.

[0003] After searching, the patent with application number 201711484771.2 discloses a method and system for calculating carbon emissions of construction projects, which calculates the carbon emissions of construction projects according to the functional unit, target range and the corresponding carbon emission factor within the target range, wherein the target range of carbon emission calculation includes: building material preparation stage, building material transportation stage and construction machinery stage; the patent with application number 202111627808 discloses a method for calculating carbon emissions in the construction stage, which calculates the carbon emissions of construction machinery according to the energy consumed by construction machinery. However, when using the above-mentioned construction project carbon emission calculation method to calculate the carbon emissions in the entire life cycle of construction, the carbon emission reduction generated by the recycling stage of turnover materials after the construction is completed is not taken into account, which will cause incomplete carbon emission calculation, and then lead to inaccurate carbon emission calculation results in the entire life cycle of construction. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a carbon emission accounting method and system based on circulating materials during the building construction stage, which solves the technical problem that the prior art does not take into account the recycling rate of circulating materials, resulting in incomplete carbon emission calculations and low accuracy of calculation results, thereby achieving the purpose of improving the completeness and accuracy of carbon emission calculations of circulating materials.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a method for calculating carbon emissions of turnover materials during the construction phase of a building, comprising the following steps:

[0006] Obtain relevant data on turnover materials;

[0007] Determine the functional units and target scope for carbon emission accounting of circulating materials during the construction phase of a building, where the target scope includes the production phase of circulating materials, the transportation phase of circulating materials, the installation phase of circulating materials, and the recycling phase of circulating materials;

[0008] Obtain relevant parameters for carbon emission accounting in the production stage of the turnover materials, relevant parameters for carbon emission accounting in the transportation stage of the turnover materials, relevant parameters for carbon emission accounting in the installation stage of the turnover materials, and relevant parameters for carbon emission reduction accounting in the recycling stage of the turnover materials;

[0009] Calculate the carbon emissions during the production stage of the turnover materials, the carbon emissions during the transportation stage of the turnover materials, the carbon emissions during the installation stage of the turnover materials, and the carbon emission reduction during the recycling stage of the turnover materials;

[0010] The carbon emissions of circulating materials in the building construction phase are calculated based on the carbon emissions in the circulating materials production phase, the carbon emissions in the circulating materials transportation phase, the carbon emissions in the circulating materials installation phase and the carbon emission reductions in the circulating materials recycling phase.

[0011] Furthermore, relevant parameters for carbon emission accounting in the circulating material production stage are obtained, including: the consumption of circulating materials, the carbon emission factor of circulating material production, the amount of time the circulating materials are used during the construction period, and the amount of time specified in the circulating material quota.

[0012] Furthermore, relevant parameters for carbon emission accounting in the turnover material transportation stage are obtained, including: consumption of turnover materials, average transportation distance and carbon emission factor of transportation machinery.

[0013] Furthermore, relevant parameters for carbon emission accounting during the installation phase of circulating materials are obtained, including: the consumption of construction machinery shifts, the energy consumption of construction machinery shifts, and the carbon emission factor of the energy of construction machinery shifts.

[0014] Furthermore, relevant parameters for carbon emission reduction accounting in the turnover material recovery stage are obtained, including: the consumption of turnover materials, the recovery rate of turnover materials and the carbon emission factor of recycled materials.

[0015] Furthermore, the specific calculation formula for the carbon emissions of turnover materials during the building construction phase is:

[0016] C jc =(C jm +C jy +f cs -C hs ) / A

[0017] Among them, C jm Refers to the carbon emissions during the production stage of turnover materials, C jy Refers to the carbon emissions during the transportation stage of turnover materials, f cs Refers to the carbon emissions during the installation phase of turnover materials, C hs Refers to the carbon emission reduction in the recycling stage of turnover materials, and A refers to the building area of ​​the project being calculated.

[0018] Furthermore, the relevant data of the turnover materials include the types of turnover materials and the usage of each turnover material.

[0019] Furthermore, the functional unit refers to the carbon emissions of turnover materials per unit of building area.

[0020] The carbon emission accounting system based on circulating materials during the construction phase of a building includes:

[0021] A data acquisition module, wherein the data acquisition module is used to acquire relevant data of turnover materials;

[0022] A determination module, the determination module is used to determine the functional unit and target range of carbon emission accounting of turnover materials in the construction phase of the building, wherein the target range includes the production phase of turnover materials, the transportation phase of turnover materials, the installation phase of turnover materials and the recycling phase of turnover materials;

[0023] A parameter acquisition module, the parameter acquisition module is used to obtain relevant parameters for carbon emission accounting in the turnover material production stage, relevant parameters for carbon emission accounting in the turnover material transportation stage, relevant parameters for carbon emission accounting in the turnover material installation stage, and relevant parameters for carbon emission reduction accounting in the turnover material recovery stage;

[0024] A first calculation module, the first calculation module is used to calculate the carbon emissions in the production stage of the turnover materials, the carbon emissions in the transportation stage of the turnover materials, the carbon emissions in the installation stage of the turnover materials, and the carbon emission reduction in the recycling stage of the turnover materials;

[0025] The second calculation module is used to calculate the carbon emissions of circulating materials in the building construction phase according to the carbon emissions in the circulating materials production phase, the carbon emissions in the circulating materials transportation phase, the carbon emissions in the circulating materials installation phase and the carbon emission reduction in the circulating materials recycling phase.

[0026] By means of the above technical solution, the present invention provides a carbon emission accounting method and system based on turnover materials in the building construction stage, which has at least the following beneficial effects:

[0027] 1. The present invention clarifies the target scope of carbon emission accounting of circulating materials in the construction stage of a building from the perspective of the entire life cycle, including the production stage of circulating materials, the transportation stage of circulating materials, the installation stage of circulating materials and the recycling stage of circulating materials, and establishes a complete carbon emission inventory, which can comprehensively calculate the carbon emissions of circulating materials in the construction stage of a building, thereby improving the completeness and accuracy of the calculation of building carbon emissions.

[0028] 2. The present invention recycles and reuses circulating materials according to their own characteristics, and can comprehensively and effectively calculate the carbon emissions of circulating materials during the building construction phase, solving the problem of incomplete carbon emission accounting of circulating materials and providing a quantitative basis for conducting green building evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0030] Figure 1 It is a flow chart of the carbon emission accounting method based on the turnover materials in the building construction stage of the present invention;

[0031] Figure 2 This is the calculation range of carbon emissions from turnover materials during the building construction phase in the present invention;

[0032] Figure 3 This is an illustration of the carbon source of the turnover materials in the building construction stage of the present invention;

[0033] Figure 4 It is a block diagram of the carbon emission accounting system based on the turnover materials in the building construction stage of the present invention.

[0034] In the figure: 10, data acquisition module; 20, determination module; 30, parameter acquisition module; 40, first calculation module; 50, second calculation module. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0036] Those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, so the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0037] It should be noted that for the construction industry, the "Building Carbon Emission Calculation Standard" GB / T51366-2019 is currently the only standard for calculating building carbon emissions. In practice, it is found that the "Building Carbon Emission Calculation Standard" GB / T51366-2019 includes the carbon emissions of the entire life cycle of the production and transportation stage, construction stage, operation stage and demolition stage. Among them, the carbon emissions in the construction stage account for about 2%-3% of the total carbon emissions. According to relevant data verification, the carbon emissions of circulating materials in the construction stage account for about 70% of the construction stage.

[0038] Please refer to Figure 1-Figure 3 , shows a carbon emission accounting method based on turnover materials in the building construction stage according to this embodiment, which specifically includes the following steps:

[0039] S101. Obtain relevant data of turnover materials.

[0040] Circulation materials refer to materials that can be used multiple times during the construction process and basically maintain their original physical form while gradually transferring their value. There are many types of circulation materials, and the type of circulation materials required can be determined based on actual needs.

[0041] In this embodiment, the types of circulating materials in the building construction phase include: wooden formwork, steel formwork, wooden squares, full-frame steel pipes, full-frame fasteners, scaffolding steel pipes, scaffolding fasteners, scaffolding sheets and safety nets, and the amount of each circulating material can be calculated based on the location of the construction project.

[0042] S102. Determine the functional unit and target range for carbon emission accounting of turnover materials during the construction phase of a building.

[0043] Specifically, buildings can be divided into residential buildings, office buildings, and commercial buildings. However, different types of buildings have different structural systems, structural strengths, and required performances. In order to reasonably evaluate the carbon emissions of turnover materials during the construction phase of different types of buildings, in this embodiment, the carbon emissions of turnover materials per unit building area (kgCO2e / m 2 ) is used as the functional unit for carbon emission accounting of turnover materials during the construction phase of a building.

[0044] The carbon emission accounting of circulating materials covers the entire life cycle of the building construction stage, and the time boundary should be the time from the start of the project to the use of each sub-project in the final acceptance. Therefore, in this embodiment, the target range of the carbon emission accounting of circulating materials in the building construction stage includes four stages: the circulating material production stage, the circulating material transportation stage, the circulating material installation stage and the circulating material recycling stage.

[0045] S103. Obtain relevant parameters for carbon emission accounting in the production stage of turnover materials.

[0046] Specifically, the relevant parameters for carbon emission accounting in the production stage of circulating materials include: the consumption of circulating materials, the carbon emission factor of circulating materials production, the amount of time the circulating materials are used during the construction period, and the amount of time specified in the circulating materials quota.

[0047] In this embodiment, the consumption of turnover materials can be determined according to the quota standard of the construction project location, and the carbon emission factor corresponding to each turnover material is shown in Table 1:

[0048] Table 1 Carbon emission factors for turnover material production

[0049] Types of turnover materials unit <![CDATA[Carbon emission factor (kgCO2e)]]> Wood formwork <![CDATA[m 3 ]]> 487 Steel formwork kg 3.15 Wood <![CDATA[m 3 ]]> 139 Full frame steel pipe kg 3.15 Full frame fasteners kg 3.15 Scaffolding steel pipe kg 3.15 Scaffolding fasteners kg 3.15 Scaffolding <![CDATA[m 2 ]]> 1.72 Safety Net <![CDATA[m 2 ]]> 3.7

[0050] In this embodiment, the usage time of each turnover material during the construction period and the usage time specified by the quota of each turnover material are shown in Table 2:

[0051] Table 2 The usage time of turnover materials during construction and the usage time specified in the turnover material quota

[0052]

[0053]

[0054] S104. Calculate the carbon emissions in the production stage of circulating materials according to the relevant parameters of carbon emissions accounting in the production stage of circulating materials. The specific calculation formula is as follows:

[0055]

[0056] Among them, C jm Refers to the carbon emissions during the production stage of turnover materials, M i Refers to the consumption of the i-th turnover material, F i Refers to the carbon emission factor of the production of the i-th turnover material, C ZX1 Refers to the amount of time that turnover materials are used during construction, C ZX2 Refers to the amount of time specified in the turnover material quota.

[0057] S105. Obtain relevant parameters for carbon emission accounting in the turnover material transportation stage.

[0058] Specifically, the relevant parameters for carbon emission accounting during the transportation stage of circulating materials include: the consumption of circulating materials, the average transportation distance and the carbon emission factor of transportation machinery.

[0059] It should be noted that the carbon emission accounting in the turnover material transportation stage should theoretically also include processes such as the production of transportation machinery and the construction of infrastructure such as transportation roads. However, considering that the basic data on processes such as the production of transportation machinery and the construction of infrastructure such as transportation roads are still incomplete, and the environmental impact of such processes on the transportation of turnover materials is relatively small, they can be ignored.

[0060] In this embodiment, the consumption and average transportation distance of various turnover materials used in the building construction stage can be calculated and determined according to the construction project, and the mechanical equipment used to transport turnover materials includes gasoline trucks and diesel trucks, and both gasoline trucks and diesel trucks are divided into three types: light, medium and heavy. The carbon emission factors of the transportation machinery used to transport turnover materials in the building construction stage are shown in Table 3:

[0061] Table 3 Carbon emission factors of transport machinery

[0062] Type of transportation <![CDATA[Carbon emission factor (kgCO2e / (t·km))]]> Light gasoline truck transportation (load 2t) 0.334 Medium-sized gasoline truck transportation (load capacity 8t) 0.115 Heavy gasoline truck transportation (load 10) 0.104 Heavy gasoline truck transportation (load capacity 18) 0.104 Light diesel truck transportation (load 2t) 0.286 Medium diesel truck transportation (load capacity 8t) 0.179 Heavy diesel truck transport (load 10) 0.162 Heavy diesel truck transport (load capacity 18) 0.129 Heavy diesel truck transport (load capacity 30) 0.078

[0063] S106. Calculate the carbon emissions in the turnover material transportation stage according to the relevant parameters of carbon emissions accounting in the turnover material transportation stage. The specific calculation formula is as follows:

[0064]

[0065] Among them, C jy Refers to the carbon emissions during the transportation stage of turnover materials, M i Refers to the consumption of the i-th turnover material, D i Refers to the average transportation distance of the i-th turnover material, T i Refers to the carbon emission factor per unit weight and transportation distance under the transportation mode of the i-th turnover material (kgCO2e / (t·km)), 1 refers to the unilateral transportation of turnover materials from the material factory to the construction project, α HSi Refers to the one-way transportation of non-consumable circulating materials from the circulating materials factory to the construction project.

[0066] S107. Obtain relevant parameters for carbon emission accounting during the installation phase of turnover materials.

[0067] Specifically, the relevant parameters for carbon emission accounting during the installation phase of circulating materials include: the consumption of construction machinery shifts, the energy consumption of construction machinery shifts, and the carbon emission factor of the energy of construction machinery shifts.

[0068] In this embodiment, the number of construction machinery shifts during the installation phase of circulating materials can be determined according to the quota standard of the construction project location, and the consumption of construction machinery shifts for circulating materials is shown in Table 4:

[0069] Table 4 Construction machinery unit consumption

[0070]

[0071] In this embodiment, the energy consumption of the construction machinery during the turnover material installation phase is shown in Table 5:

[0072] Table 5 Energy consumption of construction machinery shifts

[0073]

[0074] In this embodiment, the carbon emission factor of the energy consumed by the construction machinery shift during the turnover material installation phase (which can be obtained based on the latest data published by the National Development and Reform Commission) is shown in Table 6:

[0075] Table 6 Carbon emission factors of energy consumption per construction machine shift

[0076] Energy Name Carbon emission factor North China Regional Power Grid <![CDATA[0.8843kgCO2 / kWh]]> Northeast Regional Power Grid <![CDATA[0.7769kgCO2 / kWh <!-- 6 -->]]> East China Regional Power Grid <![CDATA[0.7035kgCO2 / kWh]]> Central China Regional Power Grid <![CDATA[0.5257kgCO2 / kWh]]> Northwest Regional Grid <![CDATA[0.6671kgCO2 / kWh]]> Southern Regional Grid <![CDATA[0.5271kgCO2 / kWh]]> gasoline <![CDATA[2.26kgCO2 / kg]]>

[0077] S108. Calculate the carbon emissions during the installation phase of circulating materials based on the relevant parameters of carbon emissions accounting during the installation phase of circulating materials. The specific calculation formula is as follows:

[0078]

[0079] Among them, f cs Refers to the carbon emissions of construction machinery shifts for turnover materials, T j Refers to the j-type construction machinery unit consumption, R j Refers to the energy consumption of the jth type of construction machinery shift, EF l Refers to the carbon emission factor of the first type of energy.

[0080] S109. Obtain relevant parameters for carbon emission reduction accounting in the recycling stage of turnover materials.

[0081] Specifically, the relevant parameters for carbon emission reduction accounting in the recycling stage of circulating materials include: the consumption of circulating materials, the recycling rate of circulating materials and the carbon emission factor of recycled materials.

[0082] It should be noted that the recycling rate of the turnover materials and the carbon emission factor of the recycled materials can be determined according to relevant standards or literature. In this embodiment, the recycling rate of the turnover materials and the carbon emission factor of the recycled materials are as shown in Table 7:

[0083] Table 7 Recycling rate of circulating materials and carbon emission factors of recycled materials

[0084] Types of turnover materials Recycling rate Recycled materials Carbon emission factors for recycled materials Wood formwork 0.5 wood 139kgCO2e / m3 Steel formwork 0.9 crude steel 1942.5kgCO2e / t Wood 0.65 wood 139kgCO2e / m3 Full frame steel pipe 0.9 crude steel 1942.5kgCO2e / t Full frame fasteners 0.9 crude steel 1942.5kgCO2e / t Scaffolding steel pipe 0.9 crude steel 1942.5kgCO2e / t Scaffolding fasteners 0.9 crude steel 1942.5kgCO2e / t Scaffolding none none - Safety Net none none -

[0085] S110. Calculate the carbon emission reduction amount in the recycling stage of circulating materials according to the relevant parameters of carbon emission reduction accounting in the recycling stage of circulating materials. The specific calculation formula is as follows:

[0086]

[0087] Among them, C hs Refers to the carbon emission reduction in the recycling stage of turnover materials, M i Refers to the consumption of the i-th turnover material, η i Refers to the recycling rate of the i-th turnover material, EF i Refers to the carbon emission factor of the i-th turnover material.

[0088] S111. Calculate the carbon emissions of the circulating materials in the construction phase according to the carbon emissions in the production phase of the circulating materials, the carbon emissions in the transportation phase of the circulating materials, the carbon emissions in the installation phase of the circulating materials, and the carbon emission reduction in the recycling phase of the circulating materials. The specific calculation formula is as follows:

[0089] C jc =(C jm +C jy +f cs -C hs ) / A

[0090] Among them, C jm Refers to the carbon emissions during the production stage of turnover materials, C jy Refers to the carbon emissions during the transportation stage of turnover materials, f cs Refers to the carbon emissions during the installation phase of turnover materials, C hs Refers to the carbon emission reduction in the recycling stage of turnover materials, and A refers to the building area of ​​the project being calculated.

[0091] Through this embodiment, the present invention clarifies the target scope of carbon emission accounting of circulating materials in the building construction stage from the perspective of the whole life cycle, including the circulating materials production stage, the circulating materials transportation stage, the circulating materials installation stage and the circulating materials recycling stage, and establishes a complete carbon emission inventory, so as to be able to comprehensively calculate the carbon emissions of circulating materials in the measures fee in the building construction stage, and the carbon emissions of circulating materials account for about 70% of the carbon emissions in the building construction stage, thereby improving the completeness and accuracy of the building carbon emission calculation.

[0092] Please refer to Figure 4 This embodiment also provides a system for implementing the above-mentioned carbon emission accounting method based on turnover materials in the building construction stage, including:

[0093] Data acquisition module 10, the data acquisition module 10 is used to obtain the relevant data of turnover materials. According to the construction organization design, the relevant data of the turnover materials used in the construction project can be obtained, including the types of turnover materials and the amount of each turnover material;

[0094] Determination module 20, determination module 20 is used to determine the functional unit and target range of carbon emission accounting of turnover materials in the building construction stage, wherein the target range of carbon emission accounting of turnover materials in the building construction stage includes the turnover material production stage, turnover material transportation stage, turnover material installation stage and turnover material recovery stage;

[0095] A parameter acquisition module 30 is used to acquire relevant parameters for carbon emission accounting in the production stage of the turnover materials, relevant parameters for carbon emission accounting in the transportation stage of the turnover materials, relevant parameters for carbon emission accounting in the installation stage of the turnover materials, and relevant parameters for carbon emission reduction accounting in the recycling stage of the turnover materials;

[0096] The first calculation module 40 is used to calculate the carbon emissions in the production stage of the turnover materials, the carbon emissions in the transportation stage of the turnover materials, the carbon emissions in the installation stage of the turnover materials, and the carbon emission reduction in the recycling stage of the turnover materials according to the obtained relevant parameters of the carbon emissions in the production stage of the turnover materials, the relevant parameters of the carbon emissions in the transportation stage of the turnover materials, the relevant parameters of the carbon emissions in the installation stage of the turnover materials, and the relevant parameters of the carbon emission reduction in the recycling stage of the turnover materials;

[0097] The second calculation module 50 is used to calculate the carbon emissions of the circulating materials in the building construction phase according to the carbon emissions in the circulating materials production phase, the carbon emissions in the circulating materials transportation phase, the carbon emissions in the circulating materials installation phase and the carbon emission reduction in the circulating materials recycling phase.

[0098] Through this embodiment, the present invention establishes a complete carbon emission inventory for circulating materials, which can comprehensively calculate the carbon emissions of circulating materials in the measures fee during the construction phase of a building. Moreover, after verification by the construction project data, the carbon emissions of circulating materials account for approximately 70% of the carbon emissions during the construction phase of the building, thereby improving the completeness and accuracy of the building carbon emission calculation.

[0099] The carbon emission accounting system based on circulating materials in the building construction stage of this embodiment is used to implement the corresponding carbon emission accounting methods based on circulating materials in the building construction stage in the aforementioned multiple method embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0100] Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the above embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiments.

[0101] The above implementation methods have been described in detail. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A carbon emission accounting method based on circulating materials during the construction phase of a building, characterized in that: The following steps are involved: Obtain relevant data on turnover materials; Determine the functional units and target scope for carbon emission accounting of circulating materials during the construction phase of a building, where the target scope includes the production phase of circulating materials, the transportation phase of circulating materials, the installation phase of circulating materials, and the recycling phase of circulating materials; Obtain relevant parameters for carbon emission accounting in the production stage of the turnover materials, relevant parameters for carbon emission accounting in the transportation stage of the turnover materials, relevant parameters for carbon emission accounting in the installation stage of the turnover materials, and relevant parameters for carbon emission reduction accounting in the recycling stage of the turnover materials; The carbon emissions in the production stage of the turnover materials, the carbon emissions in the transportation stage of the turnover materials, the carbon emissions in the installation stage of the turnover materials and the carbon emission reduction in the recycling stage of the turnover materials are calculated. The calculation formula for the carbon emissions in the transportation stage of the turnover materials is as follows: Among them, C jy Refers to the carbon emissions during the transportation stage of turnover materials, M i Refers to the consumption of the i-th turnover material, D i Refers to the average transportation distance of the i-th turnover material, T i Refers to the carbon emission factor per unit weight and transportation distance under the transportation mode of the i-th turnover material, 1 refers to the unilateral transportation of turnover materials from the material factory to the construction project, α HSi Refers to the one-way transportation of non-consumable turnover materials from the turnover material factory to the construction project; The carbon emissions of the circulating materials in the construction phase are calculated based on the carbon emissions in the production phase of the circulating materials, the carbon emissions in the transportation phase of the circulating materials, the carbon emissions in the installation phase of the circulating materials, and the carbon emission reduction in the recycling phase of the circulating materials. The calculation formula is: C jc =(C jm +C jy +f cs -C hs ) / A Among them, C jm Refers to the carbon emissions during the production stage of turnover materials, C jy Refers to the carbon emissions during the transportation stage of turnover materials, f cs Refers to the carbon emissions during the installation phase of turnover materials, C hs Refers to the carbon emission reduction in the recycling stage of turnover materials, and A refers to the building area of ​​the project being calculated.

2. The carbon emission accounting method according to claim 1, characterized in that: Obtain relevant parameters for carbon emission accounting in the turnover material production stage, including: the consumption of turnover materials, the carbon emission factor of turnover material production, the amount of time the turnover materials are used during the construction period, and the amount of time specified in the turnover material quota.

3. The carbon emission accounting method according to claim 1, characterized in that: Obtain relevant parameters for carbon emission accounting during the turnover material transportation stage, including: consumption of turnover materials, average transportation distance, and carbon emission factor of transportation machinery.

4. The carbon emission accounting method according to claim 1, characterized in that: Relevant parameters for carbon emission accounting during the installation phase of the turnover materials are obtained, including: the consumption of construction machinery shifts, the energy consumption of construction machinery shifts, and the carbon emission factor of the energy of construction machinery shifts.

5. The carbon emission accounting method according to claim 1, characterized in that: Obtain relevant parameters for carbon emission reduction accounting in the turnover material recycling stage, including: the consumption of turnover materials, the recycling rate of turnover materials and the carbon emission factor of recycled materials.

6. The carbon emission accounting method according to claim 1, characterized in that: The relevant data of the turnover materials include the types of turnover materials and the usage of each turnover material.

7. The carbon emission accounting method according to claim 1, characterized in that: The functional unit refers to the carbon emissions of turnover materials per unit of building area.

8. A system for implementing the carbon emission accounting method according to any one of claims 1 to 7, characterized in that: include: A data acquisition module (10), the data acquisition module (10) being used to acquire relevant data of turnover materials; A determination module (20), the determination module (20) is used to determine the functional unit and target range of carbon emission accounting of turnover materials in the building construction stage, wherein the target range includes the turnover material production stage, the turnover material transportation stage, the turnover material installation stage and the turnover material recovery stage; A parameter acquisition module (30), the parameter acquisition module (30) is used to acquire relevant parameters for carbon emission accounting in the turnover material production stage, relevant parameters for carbon emission accounting in the turnover material transportation stage, relevant parameters for carbon emission accounting in the turnover material installation stage, and relevant parameters for carbon emission reduction accounting in the turnover material recovery stage; A first calculation module (40), the first calculation module (40) is used to calculate the carbon emissions in the production stage of the turnover materials, the carbon emissions in the transportation stage of the turnover materials, the carbon emissions in the installation stage of the turnover materials, and the carbon emission reduction in the recycling stage of the turnover materials; The second calculation module (50) is used to calculate the carbon emissions of the circulating materials in the building construction stage based on the carbon emissions in the circulating materials production stage, the carbon emissions in the circulating materials transportation stage, the carbon emissions in the circulating materials installation stage and the carbon emission reduction in the circulating materials recycling stage.

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