CN114637967B - Accounting method for carbon emission in whole asphalt concrete pavement process - Google Patents
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- 239000011384 asphalt concrete Substances 0.000 title claims abstract description 149
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
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Abstract
The invention discloses a calculation method for carbon emission in the whole paving process of an asphalt concrete surface layer, which comprises the following steps: determining the whole process stage of asphalt pavement construction and corresponding accounting accuracy requirements; according to the calculation accuracy requirement of the whole process stage of asphalt pavement construction, calculating the carbon emission amount of the asphalt concrete production stage, the carbon emission amount of the asphalt concrete transportation stage and the carbon emission amount of the asphalt concrete on-site paving and rolling stage; and according to the carbon emission amount of the asphalt concrete production stage, the carbon emission amount of the asphalt concrete transportation stage and the carbon emission amount of the asphalt concrete on-site paving and rolling stage, accounting the total carbon emission amount of the asphalt concrete surface layer paving whole process. By adopting the technical scheme of the invention, the calculation of the carbon emission of the full chain of asphalt pavement is realized, and the method has important significance for future construction and evaluation of low-carbon environment-friendly asphalt pavement.
Description
Technical Field
The invention belongs to the technical field of energy conservation and emission reduction in traffic construction, and relates to an accounting method for carbon emission in the whole pavement process of an asphalt concrete surface layer.
Background
By 2020, the total road mileage reaches 519.81 ten thousand kilometers, wherein the expressway mileage reaches 18.56 ten thousand kilometers, and the mileage scale continues to keep the first place in the world. The asphalt pavement has remarkable advantages in the aspects of comfort, visual effect and maintenance convenience, the ratio of the asphalt pavement to the expressway pavement in China is more than 90%, a large amount of raw materials are required to be consumed in the construction process of the asphalt pavement, and a large amount of greenhouse gases are generated by using a large amount of mechanical equipment in the construction and maintenance processes. Therefore, it is necessary to develop carbon emission measurement and analysis of road engineering construction as early as possible, and to discuss the technical method for evaluating low-carbon roads, whether in response to the "low-carbon economy" being actively pursued or in response to the trend of carbon emission trading systems in China in the future.
At present, some researches on carbon emission accounting in the construction process of the asphalt concrete surface layer are carried out at home and abroad, but China is lack of a system and a standard for carbon emission accounting in the whole process of asphalt concrete surface layer pavement of a system, and no clear grading standard exists for different grades of asphalt surface layer concrete pavement tasks and carbon emission measurement requirements. In view of this, it is urgently required to establish an asphalt concrete pavement carbon emission accounting method suitable for each level of service level, so as to complete accurate evaluation of carbon emission reduction effects of new technologies, new materials and new equipment of low-carbon green asphalt pavements for construction units and construction enterprises.
Disclosure of Invention
The invention aims to solve the problem of providing the accounting method for carbon emission in the whole asphalt concrete pavement process, realizes the accounting of carbon emission of the whole asphalt pavement chain, and has important significance for future construction and evaluation of low-carbon environment-friendly asphalt pavement.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the accounting method of carbon emission in the whole asphalt concrete pavement process comprises the following steps:
step S1, determining the whole construction process stage of the asphalt pavement and corresponding accounting accuracy requirements; wherein, the whole process stage of the asphalt pavement construction comprises the following steps: an asphalt concrete production stage, an asphalt concrete transportation stage and an asphalt concrete field paving and rolling stage;
s2, according to the calculation accuracy requirement of the whole process stage of asphalt pavement construction, calculating the carbon emission amount of the asphalt concrete production stage, the carbon emission amount of the asphalt concrete transportation stage and the carbon emission amount of the asphalt concrete on-site paving and rolling stage;
and S3, according to the carbon emission amount of the asphalt concrete production stage, the carbon emission amount of the asphalt concrete transportation stage and the carbon emission amount of the asphalt concrete on-site paving and rolling stage, accounting the total carbon emission amount of the asphalt concrete surface layer paving whole process.
Preferably, the accounting accuracy requirement includes: the actual emissions accounting is calculated, combined with the empirical estimation, the empirical estimation.
Preferably, in step S2, the carbon emission amount in the accounting asphalt concrete production stage is:
horizontal one: EC (EC) (M)i ＝AC i ；EE (M) ＝AE (M)
And (2) horizontal II: EC (EC) (M)i ＝T (M) ·UC (M)i ；EE (M) ＝T (M) ·UE (M)
And (3) horizontal III: EC (EC) (M)i ＝T (M) ·C (M)e ；EE (M) ＝T (M) ·E (M)e
Wherein i isThe energy source type consumed by asphalt heating during asphalt concrete mixing; j is a greenhouse gas type, j=1, 2, 3, respectively represents CO 2 、CH 4 、N 2 O；E CO2e(M) Carbon emission is generated in the mixing stage of asphalt concrete; EC (EC) (M)i The consumption of the ith energy source in the asphalt concrete mixing stage; DEF (DEF) (M)j Energy consumption type j greenhouse gas emission factors for the asphalt concrete mixing stage; GWP j Global warming potential values for class j greenhouse gases; NCV (NCV) i The average low-level heating value of the i-th energy source; EE (M) The electric energy consumed by the first mixing process; DEF (DEF) (M)e Greenhouse gas emission factors for the local area grid consumed by the blending stage; "level one" is accounting for actual emissions; level two is a combination of actual emissions accounting and empirical estimation; "level three" is an empirical estimate;
for level one: AC (alternating current) i The i-th energy consumed in the actual measurement mixing process; AE (AE) (M) The electric energy consumed for actually measuring the mixing process;
for level two: t (T) (M) Mixing task amount for the total asphalt concrete; UC (UC) (M)i I-type energy consumption amount which is unit workload of the mixing stage; UE (user Equipment) (M) The electric energy consumption of unit workload of the mixing stage;
for level three: c (C) (M)e The energy consumption is experienced in the mixing stage; e (E) (M)e Is the empirical power consumption of the blending stage.
Preferably, in step S2, the carbon emission amount in the asphalt concrete transportation stage is:
horizontal one:
and (2) horizontal II:
and (3) horizontal III: EC (EC) (T)i ＝S e ·C (T)e EE (T) ＝S e ·E (T)e
Wherein j is a greenhouse gas type, j=1, 2, 3, respectively represents CO 2 、CH 4 、N 2 O；E CO2e(T) Carbon emission is generated in the asphalt concrete transportation stage; EC (EC) (T)i I-type energy consumed in the transportation process; DEF (DEF) (T)j A class j greenhouse gas emission factor for transporting the consumed energy; GWP j Global warming potential values for class j greenhouse gases; NCV (NCV) i The average low-level heating value of the i-th energy source; EE (T) The amount of electricity consumed during transportation; DEF (DEF) (T)e Greenhouse gas emission factors for the local regional power grid consumed during the transportation phase; "level one" is accounting for actual emissions; level two is a combination of actual emissions accounting and empirical estimation; "level three" is an empirical estimate;
for level one: z is the vehicle of the actual measured energy consumption in the transportation stage; AF (AF) (i)z The method comprises the steps of (1) measuring the i-type energy consumption of the z-th vehicle for fully transporting asphalt concrete; AF' (i)z The method is characterized in that i-type energy consumption is actually measured when a z-th vehicle runs in an idle mode; AE (AE) z The electric energy consumption of the asphalt concrete is fully transported for the z-th vehicle; AE'. z The power consumption is actually measured when the z-th vehicle runs in an idle state;
for level two: s is S i The running distance of the asphalt concrete is fully transported for the vehicle; s is S i ' is the idle travel distance of the vehicle; n is n i A vehicle shift in the asphalt concrete transportation process; FCF (fiber reinforced fiber) i Constant speed fuel consumption for full load of the transportation vehicle; NCF (NCF) i Constant speed fuel consumption for full load of the transportation vehicle; FCE is the full-load constant-speed electric energy consumption of the transport vehicle; NCE is the full-load constant-speed electric energy consumption of the transport vehicle;
for level three: s is S e For the total mileage of the transport of asphalt concrete, n e For the total number of empirical vehicles for transporting asphalt concrete, C (T)e Empirical fuel consumption for transporting asphalt concrete; e (E) (T)e The method is an empirical power consumption for transporting asphalt concrete.
Preferably, in step S2, the carbon emission amount in the asphalt concrete field paving and rolling stage is as follows:
horizontal one: EC (EC) (C)m ＝AC m ；EE (C)m ＝AE m
And (2) horizontal II: EC (EC) (C)m ＝T (C)m ·UC (C)m ；EE (C)m ＝T (C)m ·UE (C)m
And (3) horizontal III: EC (EC) (C)m ＝T (C)m ·C (C)me ；EE (C)m ＝T (C)m ·E (C)me
Wherein m is each working procedure of pavement construction, and m=1, 2 and 3 respectively represent milling and cleaning of asphalt pavement, asphalt concrete paving and asphalt concrete rolling; j is a greenhouse gas type, j=1, 2, 3, respectively represents CO 2 、CH 4 、N 2 O；E CO2e(C) Carbon emission is generated in the asphalt surface layer construction stage; EC (EC) (C)m Energy consumed for the mth procedure; DEF (DEF) (C)j J greenhouse gas emission factors which consume energy in the construction stage; GWP j Global warming potential values for class j greenhouse gases; NCV (NCV) m The average low-level heating value of the energy consumed in the mth procedure; DEF (DEF) (C)e Greenhouse gas emission factors for the local area grid consumed at the construction stage; EE (C)m Electric energy consumed for the mth procedure; "level one" is accounting for actual emissions; level two is a combination of actual emissions accounting and empirical estimation; "level three" is an empirical estimate;
for level one: AC (alternating current) m Energy consumption is consumed for the m working procedure of the actual pavement construction; AE (AE) m The electric energy consumed by the mth working procedure of the actual pavement construction is consumed;
for level two: t (T) (C)m The total task amount of the mth procedure; UC (UC) (C)m The energy consumption of unit mileage construction of the mth procedure; UE (user Equipment) (C)m The power consumption is constructed for the unit mileage of the mth procedure;
for level three: c (C) (C)me Experience energy consumption for the mth process; e (E) (C)me Is the experience electricity consumption of the m-th procedure.
Preferably, the total carbon emission amount in the whole pavement process of the accounting asphalt concrete surface layer is as follows:
wherein E is CO2e Carbon emission is discharged in the whole process of paving asphalt pavement concrete; e (E) CO2e(M) Carbon emission for asphalt concrete production stage; e (E) CO2e(T) Carbon emission for asphalt concrete transportation stage; e (E) CO2e(C) Carbon emission of the asphalt concrete in the field paving and rolling stage.
According to the invention, all possible carbon emission sources caused by asphalt concrete pavement are fully considered, the actual measurement and prediction difficulty and the predicted requirement are combined, the calculation of the carbon emission amount of the asphalt pavement full chain is realized, and the method has important significance for future construction and evaluation of low-carbon environment-friendly asphalt pavement. The control type of the accounting accuracy of the differentiated pavement carbon emission accounting of the asphalt concrete surface layer facing to different grades of roads (roads and urban roads) or project requirements is divided into three accounting accuracy levels of actual emission accounting, combination of actual emission accounting and experience estimation.
Drawings
FIG. 1 is a flow chart of the accounting method of carbon emission in the whole process of asphalt concrete pavement.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Example 1:
as shown in FIG. 1, the invention provides an accounting method for carbon emission in the whole process of asphalt concrete pavement, which is used for accounting carbon emission of asphalt pavement construction for different grade roads (highway and urban road) or construction project requirements and implementing differentiated accounting accuracy control types, and is divided into three types of accounting accuracy, namely horizontal one, horizontal two and horizontal three. The construction projects of high-grade roads (expressways, primary roads, urban expressways and the like) or construction projects participating in national carbon trade markets should be completed according to 'level one', namely, the accounting process should be completed based on actual project carbon emission investigation or actual measurement data implementation. The medium-grade road construction (secondary road, city arterial road, etc.) or the construction project to participate in the national carbon trade market should at least complete the carbon emission accounting according to the level two, i.e. the accounting process should be completed based on the combined implementation of part of actual project carbon emission investigation or measured data and part of estimated data. The low-grade road construction (three-level highways and below, city secondary highways and below, etc.) or the carbon emission reduction check of the construction project is served, and the carbon emission check is completed at least according to the level three, namely, the check process is completed according to the local or national typical experience and the specific situation of the construction project. Wherein "level one" is a calculation of the actual emissions accounting; level two is a combination of actual emissions accounting and empirical estimation; "level three" is an empirical estimate.
The accounting method comprises the following steps:
step one, determining different accounting stages and corresponding accounting precision requirements according to engineering requirements
The carbon emission sources in the whole construction process of the asphalt pavement are respectively divided according to different working procedures: the method comprises an asphalt concrete mixing stage of a mixing station, a transportation stage of asphalt concrete from the mixing station to a construction site and a construction stage of an asphalt surface layer, wherein the three stages are three, and in addition, different energy consumption investigation data for asphalt surface layer construction are obtained according to different actual carbon emission measuring and calculating precision requirements of engineering projects.
Step two, determining carbon emission coefficients of various energy consumption
Selecting the average low-level heating value of energy sources, greenhouse gas emission factors and global warming potential values of various energy sources as calculated background data, and finally converting the calculation result into equivalent carbon dioxide emission of three gases of carbon dioxide, methane and nitrous oxide;
step three, accounting carbon emission of asphalt concrete production stage (asphalt concrete mixing stage of mixing station)
After determining the accuracy requirement of the carbon emission measurement in the asphalt concrete mixing stage, calculating the carbon emission result in the asphalt concrete mixing stage according to a formula (1) by combining the calculation parameters in the mixing stage and the engineering investigation result:
horizontal one: EC (EC) (M)i ＝AC i ；EE (M) ＝AE (M)
And (2) horizontal II: EC (EC) (M)i ＝T (M) ·UC (M)i ；EE (M) ＝T (M) ·UE (M)
And (3) horizontal III: EC (EC) (M)i ＝T (M) ·C (M)e ；EE (M) ＝T (M) ·E (M)e
Wherein i is the energy source consumed by asphalt heating during asphalt concrete mixing; j is a greenhouse gas type, j=1, 2, 3, respectively represents CO 2 、CH 4 、N 2 O；E CO2e(M) Carbon emission (kgCO) for asphalt concrete mixing stage 2 e)；EC (M)i Is the consumption of the ith energy source (solid or liquid fuel unit is t; gas fuel unit is km) in the asphalt concrete mixing stage 3 )；DEF (M)j Energy-consuming j-class greenhouse gas emission factors (kg/TJ) for the asphalt concrete mixing stage; GWP j Global warming potential values for class j greenhouse gases; NCV (NCV) i Average low heat generation (solid or liquid fuel unit is MJ/t; gas fuel unit is MJ/km) for class i energy 3 )；EE (M) Electric energy (kWh) consumed for the first mixing process；DEF (M)e Greenhouse gas emission factor (tCO) of a local area network consumed for the blending phase 2 e/MWh)；
For level one: AC (alternating current) i The i-th energy source consumed for actual measurement of the mixing process (solid or liquid fuel unit is t; gas fuel unit is km) 3 )；AE (M) The power consumption (kWh) for actually measuring the mixing process;
for level two: t (T) (M) Mixing task amount (t) for the total asphalt concrete; UC (UC) (M)i Class i energy consumption per unit of work in blending phase (solid or liquid fuel unit is t/t; gaseous fuel unit is km) 3 /t)；UE (M) Electric energy consumption per unit of work (kWh/km) for the blending phase;
for level three: c (C) (M)e Empirical energy consumption for blending stage (solid or liquid fuel unit is t/t; gaseous fuel unit is km) 3 /t)；E (M)e Is the empirical power consumption (kWh/t) of the mixing stage.
Step four, accounting the carbon emission of the asphalt concrete transportation stage (the transportation stage of asphalt concrete from mixing station to construction site)
After the calculation parameters of the asphalt concrete transportation link are determined, the situations of actual measurement of energy consumption, vehicle type, transportation distance and the like are combined, meanwhile, the formula considers the possible clean energy novel transportation vehicles consuming electric energy in the future, and the carbon emission result of the asphalt concrete transportation stage is calculated according to the formula (2):
horizontal one:
and (2) horizontal II:
and (3) horizontal III: EC (EC) (T)i ＝S e ·C (T)e EE (T) ＝S e ·E (T)e
Wherein j is a greenhouse gas type, j=1, 2, 3, respectively represents CO 2 、CH 4 、N 2 O；E CO2e(T) Carbon emission (kgCO) for asphalt concrete transportation stage 2 e)；EC (T)i The energy consumption of the i type for the transportation process (solid or liquid fuel unit is t; gas fuel unit is km) 3 )；DEF (T)j A class j greenhouse gas emission factor (kg/TJ) for transporting the consumed energy; GWP j Global warming potential values for class j greenhouse gases; NCV (NCV) i Average low heat generation (solid or liquid fuel unit is MJ/t; gas fuel unit is MJ/km) for class i energy 3 )；EE (T) Power consumed for transportation (kWh); DEF (DEF) (T)e Greenhouse gas emission factor (tCO) of a local regional power grid consumed for a transportation phase 2 e/MWh)；
For level one: z is the vehicle of the actual measured energy consumption in the transportation stage; AF (AF) (i)z Class i energy consumption (t/100 km) for full transport of asphalt concrete for the z-th vehicle; AF' (i)z I-type energy consumption (t/100 km) when the z-th vehicle runs in idle mode is actually measured; AE (AE) z The electric energy consumption (kWh/100 km) of the asphalt concrete for the z-th vehicle full load transportation is measured; AE'. z For actually measuring the electric energy consumption (kWh/100 km) of the z-th vehicle when the vehicle runs in an idle state;
for level two: s is S i Fully transporting asphalt concrete for the vehicle over a distance of travel (km); s is S i ' is the idle travel distance (km) of the vehicle; n is n i Vehicle shifts (shifts/projects) for asphalt concrete transportation; FCF (fiber reinforced fiber) i Constant speed fuel consumption (t/100 km) for full load of the transport vehicle; NCF (NCF) i Constant speed fuel consumption (t/100 km) for full load of the transport vehicle; FCE is the full-load constant-speed electric energy consumption (kWh/100 km) of the transport vehicle; NCE is the full-load constant-speed electric energy consumption (kWh/100 km) of the transport vehicle;
for level three: s is S e For the transport of asphalt concrete, total mileage (km), n e Total number of vehicles for transporting asphalt concrete, C (T)e Experience fuel consumption for transporting asphalt concretet/km)；E (T)e The electricity consumption (kWh/km) is experienced for transporting asphalt concrete.
Step five, accounting the carbon emission of the asphalt concrete in-situ paving and rolling stage (the construction stage of the asphalt surface layer)
After the carbon emission measurement precision requirement of asphalt pavement is determined, calculating the carbon emission result of asphalt pavement according to a formula (3) by combining construction stage calculation parameters and engineering investigation results:
level one EC (C)m ＝AC m ；EE (C)m ＝AE m
And (2) horizontal II: EC (EC) (C)m ＝T (C)m ·UC (C)m ；EE (C)m ＝T (C)m ·UE (C)m
And (3) horizontal III: EC (EC) (C)m ＝T (C)m ·C (C)me ；EE (C)m ＝T (C)m ·E (C)me
Wherein m is each working procedure of pavement construction, and m=1, 2 and 3 respectively represent milling and cleaning (maintenance) of asphalt pavement, asphalt concrete paving and asphalt concrete rolling; j is a greenhouse gas type, j=1, 2, 3, respectively represents CO 2 、CH 4 、N 2 O；E CO2e(C) Carbon emission (kgCO) of asphalt surface layer in construction stage 2 e)；EC (C)m The energy consumed for the mth step (solid or liquid fuel unit is t; gas fuel unit is km) 3 )；DEF (C)j A j-class greenhouse gas emission factor (kg/TJ) that consumes energy for the construction stage; GWP j Global warming potential values for class j greenhouse gases; NCV (NCV) m Average low-grade heating value (solid or liquid fuel unit is MJ/t; gas fuel unit is MJ/km) for energy consumption in the mth step 3 )；DEF (C)e Greenhouse gas emission factor (tCO) of local area power grid consumed for construction stage 2 e/MWh)；EE (C)m Electric energy (kWh) consumed for the mth process;
for level one: AC (alternating current) m Energy consumption for the mth process of actually measuring pavement construction (solid or liquid fuel unit is t; gas fuel unit is km) 3 )；AE m The power consumption (kWh) of the mth process for actually measuring the pavement construction;
for level two: t (T) (C)m Total task amount (km) for the mth process; UC (UC) (C)m Energy consumption per unit mileage of the mth process (solid or liquid fuel unit is t/km; gas fuel unit is km) 3 /km)；UE (C)m The power consumption (kWh/km) is constructed for the unit mileage of the mth procedure;
for level three: c (C) (C)me Empirical energy consumption for the mth process (solid or liquid fuel unit is t/km; gaseous fuel unit is km) 3 /km)；E (C)me The power consumption is the experience of the mth procedure (kWh/km).
Step six, accounting the total carbon emission amount of the whole asphalt concrete surface pavement process
Calculating the total amount of three-stage carbon emission according to the formula (4):
wherein E is CO2e Carbon emission (kgCO) of asphalt surface concrete pavement in whole process 2 e)；E CO2e(M) Carbon emissions (kgCO) for asphalt concrete production stage 2 e)；E CO2e(T) Carbon emissions (kgCO) for asphalt concrete transportation stage 2 e)；E CO2e(C) Carbon emissions (kgCO) for asphalt concrete in situ paving and rolling stage 2 e)。
Because the carbon emission evaluation system in the whole asphalt pavement process is established on the investigation data, in order to embody the carbon emission source in the asphalt pavement construction process and the data collection level in the field investigation process, the invention combines the investigation experience of the past asphalt pavement, and respectively draws reasonable pavement construction energy consumption related data for the scene of calculating three precision requirements of the carbon emission of the future asphalt pavement concrete pavement so as to explain the detailed calculation process of the invention.
The following is based on data investigation of new projects of first-class highway asphalt pavement in certain province in northern China (wherein the asphalt surface layer structure is 5cm medium-grain modified asphalt concrete and 7cm coarse-grain asphalt concrete), and the carbon emission accounting method provided by the invention is applied to the carbon emission accounting process under the requirement of differential accounting precision. The method specifically comprises the following steps:
step one, determining different accounting stages and corresponding accounting precision requirements according to engineering requirements
Dividing carbon emission sources in the whole construction process of the asphalt pavement into: the asphalt concrete mixing stage, the asphalt concrete transportation stage from the mixing station to the construction site and the asphalt surface layer construction stage are three stages; according to different pavement grade requirements, three stages of carbon emission measurement standards are divided into: actual emissions accounting, combination of actual emissions accounting with empirical estimation, three different demand scenarios will be calculated here.
Step two, determining carbon emission coefficients of various energy consumption
The average low-grade heating value of energy sources, the greenhouse gas emission factors of various energy sources and the global warming potential value are selected as calculated background data, the calculation result is finally converted into carbon dioxide, methane and nitrous oxide, the equivalent carbon dioxide emission of three gases, the average low-grade heating value of all asphalt pavement mixing and construction activities possibly using energy materials and the energy greenhouse gas emission factors provided by IPCC report are calculated by table 2, the global warming potential value calculated by converting three greenhouse gases into equivalent carbon dioxide is calculated by table 3, and the carbon emission factor of the power grid of the 2015-2017 middle-national region causing carbon dioxide emission caused by all electric energy consumption is calculated.
TABLE 1 energy average low calorific value and greenhouse gas emission factor
TABLE 2 global warming potential values for greenhouse gases (100 years)
| Greenhouse gases | Global warming potential value |
| CO 2 | 1 |
| CH 4 | 25 |
| N 2 O | 298 |
Table 3 regional grid carbon emission factors of China 2015-2017
According to different actual carbon emission measurement accuracy requirements of engineering projects, different asphalt surface layer construction energy consumption investigation data are obtained, wherein the assumed 30km asphalt concrete upper surface layer construction energy consumption is taken as an example, construction energy consumption investigation tables 4, 5 and 6 are respectively provided, and three accuracy requirements of actual emission accounting, combination of actual emission accounting and experience estimation are correspondingly calculated.
Table 4 carbon emission level-investigation table for asphalt surface layer construction
Table 5 two investigation table for asphalt surface layer construction carbon emission level
Table 6 three investigation table for asphalt surface layer construction carbon emission level
For level one: actual emissions accounting
Step three, accounting carbon emission in asphalt concrete production stage
After determining the accuracy requirement of the carbon emission measurement in the asphalt concrete mixing stage, calculating the carbon emission result in the asphalt concrete mixing stage according to a formula (1) and a table 4 by combining the calculation parameters in the mixing stage and the engineering investigation result:
EC (M)i ＝AC i ＝63(km 3 )；EE (M) ＝AE (M) ＝5130(kwh)
step four, accounting carbon emission in asphalt concrete transportation stage
After the calculation parameters of the asphalt concrete transportation link are determined, the situations of actual measurement energy consumption, vehicle type, transportation distance and the like are combined, meanwhile, the formula considers the possible clean energy novel transportation vehicles consuming electric energy in the future, and the carbon emission result of the asphalt concrete transportation stage is calculated according to the formula (2) and the table 4:
step five, accounting carbon emission of asphalt concrete in-situ paving and rolling stages
After the accuracy requirement of the carbon emission measurement of asphalt pavement is determined, calculating the carbon emission result of asphalt pavement according to a formula (3) and a table 4 by combining the construction stage calculation parameters and the engineering investigation result:
EC (C)m ＝AC m ＝33.2(t)；EE (C)m ＝AE m ＝200(kWh)
step six, calculating the total carbon emission of the asphalt concrete pavement according to a formula (4) in the whole asphalt concrete pavement process:
for level two: combination of actual emissions accounting with empirical estimation
Step three, accounting carbon emission in asphalt concrete production stage
After determining the accuracy requirement of the carbon emission measurement in the asphalt concrete mixing stage, calculating the carbon emission result in the asphalt concrete mixing stage according to the formula (1) and the table 5 by combining the calculation parameters in the mixing stage and the engineering investigation result:
EC (M)i ＝T (M) ·UC (M)i ＝2.9×32100÷1000＝93.09(km 3 )；
EE (M) ＝T (M) ·UE (M) ＝193.5×32100÷1000＝6211.35(kWh)
step four, accounting carbon emission in asphalt concrete transportation stage
After the calculation parameters of the asphalt concrete transportation link are determined, the situations of actual measurement energy consumption, vehicle type, transportation distance and the like are combined, meanwhile, the formula considers the possible clean energy novel transportation vehicles consuming electric energy in the future, and the carbon emission result of the asphalt concrete transportation stage is calculated according to the formula (2) and the table 5:
step five, accounting carbon emission of asphalt concrete in-situ paving and rolling stages
After the accuracy requirement of the carbon emission measurement of asphalt pavement is determined, calculating the carbon emission result of asphalt pavement according to a formula (3) and a table 5 by combining the construction stage calculation parameters and the engineering investigation result:
EC (C)m ＝T (C)m ·UC (C)m ＝0.13×30+1.065×15＝35.85(t)；
EE (C)m ＝T (C)m ·UE (C)m ＝30×10＝300(kWh)
step six, accounting the total carbon emission amount of the whole asphalt concrete surface pavement process
Calculating the total amount of carbon emission of asphalt concrete pavement of the second level according to the formula (4):
for level three: empirical estimation
Step three, accounting carbon emission in asphalt concrete production stage
After determining the accuracy requirement of the carbon emission measurement in the asphalt concrete mixing stage, calculating the carbon emission result in the asphalt concrete mixing stage according to a formula (1) and a table 6 by combining the calculation parameters in the mixing stage and the engineering investigation result:
EC (M)i ＝T (M) ·C (M)e ＝2.55×30＝76.5(km 3 )；
EE (M) ＝T (M) ·E (M)e ＝225×30＝6750(kWh)
step four, accounting carbon emission in asphalt concrete transportation stage
After the calculation parameters of the asphalt concrete transportation link are determined, the situations of actual measurement of energy consumption, vehicle type, transportation distance and the like are combined, meanwhile, the formula considers the possible clean energy novel transportation vehicles consuming electric energy in the future, and the carbon emission result of the asphalt concrete transportation stage is calculated according to the formula (2) and the table 6:
step five, accounting carbon emission of asphalt concrete in-situ paving and rolling stages
After the accuracy requirement of the carbon emission measurement of asphalt pavement is determined, calculating the carbon emission result of asphalt pavement according to a formula (3) and a table 6 by combining the construction stage calculation parameters and the engineering investigation result:
EC (C)m ＝T (C)m ·C (C)me ＝30×1.05＝31.5(t)；
EE (C)m ＝T (C)m ·E (C)me ＝30×10＝300(kWh)
step six, accounting the total carbon emission amount of the whole asphalt concrete surface pavement process
Calculating the total amount of carbon emission of asphalt concrete surface pavement of the third level according to a formula (4):
finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (3)
1. The accounting method of the carbon emission in the whole asphalt concrete pavement process is characterized by comprising the following steps of:
step S1, determining the whole construction process stage of the asphalt pavement and corresponding accounting accuracy requirements; wherein, the whole process stage of the asphalt pavement construction comprises the following steps: an asphalt concrete production stage, an asphalt concrete transportation stage and an asphalt concrete field paving and rolling stage;
s2, according to the calculation accuracy requirement of the whole process stage of asphalt pavement construction, calculating the carbon emission amount of the asphalt concrete production stage, the carbon emission amount of the asphalt concrete transportation stage and the carbon emission amount of the asphalt concrete on-site paving and rolling stage;
s3, according to the carbon emission amount of the asphalt concrete production stage, the carbon emission amount of the asphalt concrete transportation stage and the carbon emission amount of the asphalt concrete on-site paving and rolling stage, accounting the total carbon emission amount of the asphalt concrete surface layer paving whole process;
in the step S2, the carbon emission amount of the production stage of the accounting asphalt concrete is as follows:
horizontal one: EC (EC) (M)i ＝AC i ；EE (M) ＝AE (M)
And (2) horizontal II: EC (EC) (M)i ＝T (M) ·UC (M)i ；EE (M) ＝T (M) ·UE (M)
And (3) horizontal III: EC (EC) (M)i ＝T (M) ·C (M)e ；EE (M) ＝T (M) ·E (M)e
Wherein i is the energy source consumed by asphalt heating during asphalt concrete mixing; j is a greenhouse gas type, j=1, 2, 3, respectively represents CO 2 、CH 4 、N 2 O；E CO2e(M) Carbon emission is generated in the mixing stage of asphalt concrete; EC (EC) (M)i The consumption of the ith energy source in the asphalt concrete mixing stage; DEF (DEF) (M)j Energy consumption type j greenhouse gas emission factors for the asphalt concrete mixing stage; GWP j Global warming potential values for class j greenhouse gases; NCV (NCV) i The average low-level heating value of the i-th energy source; EE (M) The electric energy consumed by the first mixing process; DEF (DEF) (M)e Greenhouse gas emission factors for the local area grid consumed by the blending stage; "level one" is accounting for actual emissions; level two is a combination of actual emissions accounting and empirical estimation; "level three" is an empirical estimate;
for level one: AC (alternating current) i The i-th energy consumed in the actual measurement mixing process; AE (AE) (M) The electric energy consumed for actually measuring the mixing process;
for level two: t (T) (M) Mixing task amount for the total asphalt concrete; UC (UC) (M)i I-type energy consumption amount which is unit workload of the mixing stage; UE (user Equipment) (M) The electric energy consumption of unit workload of the mixing stage;
for level three: c (C) (M)e The energy consumption is experienced in the mixing stage; e (E) (M)e The empirical power consumption for the blending stage;
in step S2, the carbon emission amount in the asphalt concrete transportation stage is:
horizontal one:
and (2) horizontal II:
and (3) horizontal III: EC (EC) (T)i ＝S e ·C (T)e EE (T) ＝S e ·E (T)e
Wherein j is a greenhouse gas type, j=1, 2, 3, respectively represents CO 2 、CH 4 、N 2 O；E CO2e(T) Carbon emission is generated in the asphalt concrete transportation stage; EC (EC) (T)i I-type energy consumed in the transportation process; DEF (DEF) (T)j A class j greenhouse gas emission factor for transporting the consumed energy; GWP j Global warming potential values for class j greenhouse gases; NCV (NCV) i The average low-level heating value of the i-th energy source; EE (T) The amount of electricity consumed during transportation; DEF (DEF) (T)e Greenhouse gas emission factors for the local regional power grid consumed during the transportation phase; "level one" is accounting for actual emissions; level two is a combination of actual emissions accounting and empirical estimation; "level three" is an empirical estimate;
for level one: z is the vehicle of the actual measured energy consumption in the transportation stage; AF (AF) (i)z The method comprises the steps of (1) measuring the i-type energy consumption of the z-th vehicle for fully transporting asphalt concrete; AF' (i)z The method is characterized in that i-type energy consumption is actually measured when a z-th vehicle runs in an idle mode; AE (AE) z The electric energy consumption of the asphalt concrete is fully transported for the z-th vehicle; AE'. z The power consumption is actually measured when the z-th vehicle runs in an idle state;
for level two: s is S i The running distance of the asphalt concrete is fully transported for the vehicle; s is S i ' is the idle travel distance of the vehicle; n is n i A vehicle shift in the asphalt concrete transportation process; FCF (fiber reinforced fiber) i Constant speed fuel consumption for full load of the transportation vehicle; NCF (NCF) i Constant speed fuel consumption for full load of the transportation vehicle; FCE is the full-load constant-speed electric energy consumption of the transport vehicle; NCE is the full-load constant-speed electric energy consumption of the transport vehicle;
for level three: s is S e For the total mileage of the transport of asphalt concrete, C (T)e Empirical fuel consumption for transporting asphalt concrete; e (E) (T)e The power consumption is experienced for transporting asphalt concrete;
in the step S2, the carbon emission amount of the asphalt concrete in the on-site paving and rolling stage is as follows:
horizontal one: EC (EC) (C)m ＝AC m ；EE (C)m ＝AE m
And (2) horizontal II: EC (EC) (C)m ＝T (C)m ·UC (C)m ；EE (C)m ＝T (C)m ·UE (C)m
And (3) horizontal III: EC (EC) (C)m ＝T (C)m ·C (C)me ；EE (C)m ＝T (C)m ·E (C)me
Wherein m is each working procedure of pavement construction, and m=1, 2 and 3 respectively represent milling and cleaning of asphalt pavement, asphalt concrete paving and asphalt concrete rolling; j is a greenhouse gas type, j=1, 2, 3, respectively represents CO 2 、CH 4 、N 2 O；E CO2e(C) Is asphaltCarbon emission in the surface layer construction stage; EC (EC) (C)m Energy consumed for the mth procedure; DEF (DEF) (C)j J greenhouse gas emission factors which consume energy in the construction stage; GWP j Global warming potential values for class j greenhouse gases; NCV (NCV) m The average low-level heating value of the energy consumed in the mth procedure; DEF (DEF) (C)e Greenhouse gas emission factors for the local area grid consumed at the construction stage; EE (C)m Electric energy consumed for the mth procedure; "level one" is accounting for actual emissions; level two is a combination of actual emissions accounting and empirical estimation; "level three" is an empirical estimate;
for level one: AC (alternating current) m Energy consumption is consumed for the m working procedure of the actual pavement construction; AE (AE) m The electric energy consumed by the mth working procedure of the actual pavement construction is consumed;
for level two: t (T) (C)m The total task amount of the mth procedure; UC (UC) (C)m The energy consumption of unit mileage construction of the mth procedure; UE (user Equipment) (C)m The power consumption is constructed for the unit mileage of the mth procedure;
for level three: c (C) (C)me Experience energy consumption for the mth process; e (E) (C)me Is the experience electricity consumption of the m-th procedure.
2. The method for accounting carbon emission in the whole asphalt concrete pavement process according to claim 1, wherein the accounting accuracy requirement comprises: the actual emissions accounting is calculated, combined with the empirical estimation, the empirical estimation.
3. The method for accounting carbon emissions in the whole asphalt concrete pavement according to claim 2, wherein the total carbon emissions in the whole asphalt concrete pavement are calculated as follows:
wherein E is CO2e Carbon emission is discharged in the whole process of paving asphalt pavement concrete; e (E) CO2e(M) For drainingCarbon emission in the green concrete production stage; e (E) CO2e(T) Carbon emission for asphalt concrete transportation stage; e (E) CO2e(C) Carbon emission of the asphalt concrete in the field paving and rolling stage.
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