Overhead transmission line engineering construction carbon emission calculation method based on full life cycle method

Abstract

The invention discloses an overhead transmission line engineering construction carbon emission calculation method based on a full life cycle method. The calculation method comprises the following steps: S1, selecting GB / T 51366-2019 Building Carbon Emission Calculation Standard as an overhead transmission line carbon emission calculation criterion; s2, combining calculation standards, selecting a full life cycle method as a theoretical basis, and taking a carbon emission factor method as a main calculation method to carry out combined calculation; s3, carbon emission factors of electric energy, fossil fuel, mechanical equipment and building materials are compared in detail, and finally a carbon emission factor list suitable for overhead transmission line engineering construction is established; according to the method, the carbon emission is divided into three key stages, namely vehicle transportation, a construction process and building material use, on the basis of a full life cycle method, the complexity of analysis of main components and the overall structure of the overhead transmission line is simplified, the calculation workload and the calculation cost are reduced, and the method has wide applicability.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon emission calculation for overhead power transmission line project construction, and specifically is a method for calculating carbon emission for overhead power transmission line project construction based on a full life cycle method. Background Art

[0002] As a key component of the power system, the demand for transmission lines is rising amidst the backdrop of sustained economic growth. Although standards for carbon emission calculations have emerged in recent years, relatively few are specifically for overhead transmission lines. The existing standards are not only not close to actual projects in terms of calculation methods, but also have limitations in calculating the scope of carbon emissions from transmission lines.

[0003] The existing carbon emission calculation methods include input-output method, actual measurement method and material balance method, but all of them have certain defects. Among them, the input-output method needs to focus on the correlation between production quantity and consumption quantity, resulting in limited accuracy of the calculation results; the actual measurement method needs to first determine the carbon emission accounting boundary, and then calculate the carbon emissions by measuring the various types of gas emissions actually generated by the building. The calculation cost is high, the operation is difficult, and the versatility is limited; the material balance method conducts a comprehensive analysis and research on the input and output materials, which is labor-intensive and complex.

[0004] Therefore, the applicant has proposed a carbon emission calculation method for overhead transmission line project construction based on the full life cycle method to make up for the defects of the above-mentioned problems. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a method for calculating carbon emissions from overhead power transmission line project construction based on a full life cycle approach, which solves the problems and defects raised in the background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A method for calculating carbon emissions from overhead power transmission line construction based on a full life cycle approach, the method comprising the following steps: S1. After analyzing and comparing carbon emission calculation standards at home and abroad, GB / T 51366-2019 "Building Carbon Emission Calculation Standard" was selected as the carbon emission calculation standard for overhead transmission lines. This standard provides carbon emission calculation methods for different stages of buildings; S2. Combined with the calculation standards, based on the time range of overhead transmission line construction, the calculation boundary of carbon emissions of overhead transmission lines is determined from the product perspective. Combined with the complex construction process and large amount of engineering of overhead transmission line projects, the full life cycle method is selected as the theoretical basis and the carbon emission factor method is used as the main calculation method for combined calculation to improve the accuracy of carbon emission calculation; S3. By analyzing the carbon emission factors in industry specifications, professional research institute reports, international carbon emission databases, and research data from domestic and foreign scholars, and using timeliness, regionality, applicability, and authority as evaluation criteria, a detailed comparison of the carbon emission factors of electricity, fossil fuels, machinery and equipment, and building materials is conducted, and ultimately a list of carbon emission factors applicable to the construction of overhead transmission line projects is established; The full life cycle method of step S2 is specifically: The carbon emissions during the construction of overhead transmission line projects are divided into three stages: carbon emissions during the transportation stage, carbon emissions during the construction stage, and carbon emissions during the use of building materials. The specific calculation formula is as follows: (1) In the formula, The total carbon emissions from overhead transmission line construction projects are is the carbon emissions during the transportation phase, is the carbon emissions during the construction phase, It is the carbon emissions during the use phase of building materials.

[0007] As a further solution of the present invention: the carbon emissions of overhead power lines in the transportation stage are mainly derived from the energy consumption and related activities in the logistics transportation process, which include the fuel consumption of transportation tools and the energy consumption of mechanical equipment in the process of loading goods. The carbon emissions of the construction material transportation process of overhead power lines can be calculated based on the amount of construction materials used, transportation distance and transportation method. The specific calculation formula is as follows: (2) In the formula, i is the i-th type of transported building materials, is the transport mass of the i-th type of building materials, is the transportation distance of the i-th type of building materials, is the carbon emission factor per unit transportation distance under unit mass of the i-th type of building materials.

[0008] As a further solution of the present invention: the carbon emissions of overhead transmission lines during the construction phase are determined by calculating the total consumption of each energy source and multiplying it by the corresponding carbon emission factor. The construction phase is subdivided into six stages: foundation engineering, tower engineering, grounding engineering, line engineering, accessory installation engineering, and auxiliary engineering. The carbon emissions of each stage are further divided into two parts: construction machinery and construction personnel. The specific calculation formula is as follows: (3) in, The carbon emissions of construction workers, Carbon emissions from construction machinery and equipment; For the carbon emissions of construction machinery, the calculation method is as follows: (4) In the formula, j is the jth type of construction machinery and equipment, is the number of shifts of the jth type of construction machinery, is the carbon emission coefficient corresponding to the j-th mechanical equipment, is the workload of the jth mechanical equipment; The carbon emissions of construction workers are calculated as follows: (5) In the formula, r is the rth project, is the labor required for the rth unit project, The carbon emissions generated by the daily life of the staff per working day, is the engineering volume of the rth project, where the carbon emissions generated by personnel life per working day are based on the statistical data of existing statistical departments. It is a fixed value obtained by calculating the national annual personnel life electricity and water consumption and multiplying it by the corresponding carbon emission factor. The specific calculation formula is as follows: (6) Where W is the national annual living water consumption, is the carbon emission factor of water, I is the annual electricity consumption of people in China, is the carbon emission factor of electricity.

[0009] As a further solution of the present invention: the carbon emissions of overhead power transmission lines during the construction material use stage are mainly generated by the consumption of construction materials during the construction process. The specific calculation is shown as follows: (7) In the formula, k is the kth building material, is the consumption of the kth building material, is the carbon emission factor of the kth building material.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention clarifies the calculation standard, calculation boundary and calculation method of carbon emissions of overhead transmission lines, identifies the carbon emission sources in each stage of overhead transmission line project construction, sets the index for converting carbon dioxide, lays the foundation for the establishment of a carbon emission calculation model for overhead transmission line project construction, establishes a carbon emission factor library for electricity, fossil fuels, transportation vehicles, construction machinery, etc., and constructs a carbon emission calculation model for overhead transmission line project construction with a full life cycle method as the theoretical basis and a carbon emission factor method as the main calculation method. The calculation model divides carbon emissions into three key stages: vehicle transportation, construction process and building materials use, simplifies the complexity of the analysis of the main components and overall structure of overhead transmission lines, and reduces the calculation workload. In addition, the calculation model has wide applicability, can adapt to overhead transmission line projects under various voltage levels, has low calculation cost, less difficulty in data acquisition, and a simple calculation process. DETAILED DESCRIPTION

[0011] The following will be combined with specific examples in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0012] Example The present invention provides a method for calculating carbon emissions from overhead power transmission line construction based on a full life cycle method, the method comprising the following steps: 1. After analyzing and comparing domestic and foreign carbon emission calculation standards, GB / T 51366-2019 "Building Carbon Emission Calculation Standard" was selected as the carbon emission calculation standard for overhead transmission lines. This standard provides carbon emission calculation methods for different stages of buildings.

[0013] 2. Combined with the calculation standards, based on the time range of overhead transmission line project construction, the calculation boundary of carbon emissions of overhead transmission lines is determined from the product perspective. Combined with the complex construction process and large engineering volume of overhead transmission line projects, the full life cycle method is selected as the theoretical basis and the carbon emission factor method is used as the main calculation method for combined calculation to improve the accuracy of carbon emission calculation. The details are as follows: Based on the full life cycle method, the carbon emissions during the construction of overhead transmission line projects are divided into three stages: carbon emissions in the transportation stage, carbon emissions in the construction stage, and carbon emissions in the building materials use stage. The specific calculation formula is as follows: (1) In the formula, The total carbon emissions from overhead transmission line construction projects are is the carbon emissions during the transportation phase, is the carbon emissions during the construction phase, Carbon emissions during the use of building materials; The carbon emissions of overhead transmission lines during the transportation stage mainly come from energy consumption and related activities during the logistics transportation process, including fuel consumption of transportation tools and energy consumption of mechanical equipment during the loading process. The carbon emissions of the transportation process of construction materials for overhead transmission lines can be calculated based on the amount of construction materials used, transportation distance and transportation method. The specific calculation formula is as follows: (2) In the formula, i is the i-th type of transported building materials, is the transport mass of the i-th type of building materials, is the transportation distance of the i-th type of building materials, is the carbon emission factor per unit transportation distance under unit mass of the i-th type of building materials; The carbon emissions of overhead transmission lines during the construction phase are determined by calculating the total consumption of each energy source and multiplying it by the corresponding carbon emission factor. The construction phase is subdivided into six stages: foundation engineering, tower engineering, grounding engineering, line engineering, accessory installation engineering, and auxiliary engineering. The carbon emissions of each stage are further divided into two parts: construction machinery and construction personnel. The specific calculation formula is as follows: (3) in, The carbon emissions of construction workers, Carbon emissions from construction machinery and equipment; For the carbon emissions of construction machinery, the calculation method is as follows: (4) In the formula, j is the jth type of construction machinery and equipment, is the number of shifts of the jth type of construction machinery, is the carbon emission coefficient corresponding to the j-th mechanical equipment, is the workload of the jth mechanical equipment; The carbon emissions of construction workers are calculated as follows: (5) In the formula, r is the rth project, is the labor required for the rth unit project, The carbon emissions generated by the daily life of the staff per working day, is the engineering volume of the rth project, where the carbon emissions generated by personnel life per working day are based on the statistical data of existing statistical departments. It is a fixed value obtained by calculating the national annual personnel life electricity and water consumption and multiplying it by the corresponding carbon emission factor. The specific calculation formula is as follows: (6) Where W is the national annual living water consumption, is the carbon emission factor of water, I is the annual electricity consumption of people in China, is the carbon emission factor of electricity; The carbon emissions of overhead transmission lines during the construction material use phase are mainly generated by the consumption of construction materials during the construction process. The specific calculation is as follows: (7) In the formula, k is the kth building material, is the consumption of the kth building material, is the carbon emission factor of the kth building material.

[0014] 3. Through the analysis of carbon emission factors in industry norms, professional research institute reports, international carbon emission databases, and research data from domestic and foreign scholars, with timeliness, regionality, applicability, and authority as evaluation criteria, a detailed comparison of carbon emission factors for electricity, fossil fuels, mechanical equipment, and building materials is conducted, and ultimately a list of carbon emission factors applicable to the construction of overhead transmission line projects is established.

[0015] The specific present invention takes the 110kV overhead power transmission line project of Jingui Road, Jiangjiadong, Hubei as an example to calculate its carbon emissions: The project scale is as follows: 5.76km of new overhead double-circuit single-hung angle steel tower lines, 0.1km of double-circuit single-hung steel tube pole lines, JL3 / G1A-300 / 40 steel core aluminum stranded wire used in the new section, 2 site levelings, 1 steel plate laying, OPGW optical cables: 2 × 5.86km, pole tower planning is as follows: 24 new pole towers will be built in this project, including 12 double-circuit straight angle steel towers, 10 double-circuit tension angle steel towers, and 2 double-circuit tension steel tube poles. The truck transportation distance is 3km.

[0016] In the unit project budget table, the types, units and quantities of building materials to be transported are listed in detail. The basis for the preparation of the budget corresponds to the quota number in the "Electric Power Construction Project Budget Quota", thereby clarifying the type of vehicle used. The transportation weight, transportation distance and carbon emission factor of the various building materials obtained are substituted into formula (2) for calculation. The carbon emissions of the transportation stage of this example are calculated to be 804.63 kgCO2e. The transportation details are shown in Table 1 below: ; During the construction phase, taking the foundation project as an example, to calculate the carbon emissions of construction workers, it is necessary to match the compilation basis in the budget estimate with the quota number in the "Electric Power Construction Project Budget Quota" to obtain the number of man-days for each project, and then substitute the number of projects in the budget estimate into formula (5). The details of some construction workers are shown in Table 2 below. To calculate the carbon emissions of construction machinery, substitute the corresponding number of construction machinery equipment types, the corresponding carbon emission factors and the project quantity into formula (4). The details of some construction machinery are shown in Table 3 below. Substitute the calculated carbon emissions of construction workers and construction machinery into formula (3) to obtain the carbon emissions of the foundation project during the construction phase. The carbon emissions of other engineering projects are calculated in the same way. After calculation, the carbon emissions of the construction phase are 81624.21 kgCO2e.

[0017] The building materials in this example mainly include concrete, steel bars, etc. The consumption is calculated based on the design usage and loss rate in the budget estimate. The consumption of some building materials is shown in Table 4 below. Substituting into formula (7), the carbon emissions during the building materials use stage are 289419.86 kgCO2e.

[0018] In summary, substituting the carbon emissions calculated in the three stages into formula (1), we can get the carbon emissions of the entire overhead transmission line construction stage to be 371848.7 kgCO2e. From the analysis of carbon emissions in each stage, the construction stage and the building materials use stage are the main sources of carbon emissions. Therefore, the implementation of energy-saving and emission reduction measures should focus on these two links.

[0019] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for calculating carbon emissions from overhead power line construction based on the full life cycle approach, characterized in that: The calculation method includes the following steps: S1. After analyzing and comparing carbon emission calculation standards at home and abroad, GB / T 51366-2019 "Building Carbon Emission Calculation Standard" was selected as the carbon emission calculation standard for overhead transmission lines; S2. Combined with the calculation standards, the full life cycle method is selected as the theoretical basis and the carbon emission factor method is used as the main calculation method for combined calculation to improve the accuracy of carbon emission calculation; S3. Make a detailed comparison of carbon emission factors of electricity, fossil fuels, machinery and equipment, and building materials, and ultimately establish a list of carbon emission factors applicable to the construction of overhead transmission line projects; The full life cycle method of step S2 is specifically: The carbon emissions during the construction of overhead transmission line projects are divided into three stages: carbon emissions during the transportation stage, carbon emissions during the construction stage, and carbon emissions during the use of building materials. The specific calculation formula is as follows: （1） In the formula, The total carbon emissions from overhead transmission line construction projects are is the carbon emissions during the transportation phase, is the carbon emissions during the construction phase, It is the carbon emissions during the use phase of building materials.

2. The method for calculating carbon emissions from overhead power line construction based on the full life cycle approach according to claim 1 is characterized by: The carbon emissions of overhead transmission lines during the transportation stage mainly come from energy consumption and related activities during the logistics transportation process, including fuel consumption of transportation tools and energy consumption of mechanical equipment during the loading process. The carbon emissions of the transportation process of construction materials for overhead transmission lines can be calculated based on the amount of construction materials used, transportation distance and transportation method. The specific calculation formula is as follows: （2） In the formula, i is the i-th type of transported building materials, is the transport mass of the i-th type of building materials, is the transportation distance of the i-th type of building materials, is the carbon emission factor per unit transportation distance under unit mass of the i-th type of building materials.

3. The method for calculating carbon emissions from overhead power line construction based on the full life cycle approach according to claim 2 is characterized by: The carbon emissions of overhead transmission lines during the construction phase are determined by calculating the total consumption of each energy source and multiplying it by the corresponding carbon emission factor. Therefore, the construction phase is subdivided into six stages: foundation engineering, tower engineering, grounding engineering, line engineering, accessory installation engineering, and auxiliary engineering. The carbon emissions of each stage are further divided into two parts: construction machinery and construction personnel. The specific calculation formula is as follows: （3） in, The carbon emissions of construction workers, Carbon emissions from construction machinery and equipment; For the carbon emissions of construction machinery, the calculation method is as follows: （4） In the formula, j is the jth type of construction machinery and equipment, is the number of shifts of the jth type of construction machinery, is the carbon emission coefficient corresponding to the j-th mechanical equipment, is the workload of the jth mechanical equipment; The carbon emissions of construction workers are calculated as follows: （5） In the formula, r is the rth project, is the labor required for the rth unit project, The carbon emissions generated by the daily life of the staff per working day, is the engineering volume of the rth project, where the carbon emissions generated by personnel life per working day are based on the statistical data of existing statistical departments. It is a fixed value obtained by calculating the national annual personnel life electricity and water consumption and multiplying it by the corresponding carbon emission factor. The specific calculation formula is as follows: （6） Where W is the national annual living water consumption, is the carbon emission factor of water, I is the annual electricity consumption of people in China, is the carbon emission factor of electricity.

4. The method for calculating carbon emissions from overhead power line construction based on the full life cycle approach according to claim 3 is characterized by: The carbon emissions of overhead transmission lines during the construction material use phase are mainly generated by the consumption of construction materials during the construction process. The specific calculation is as follows: （7） In the formula, k is the kth type of building material, is the consumption of the kth building material, is the carbon emission factor of the kth building material.

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