CN116183817A - Structure heat preservation integrated external wall panel full life cycle carbon emission calculation method - Google Patents
Structure heat preservation integrated external wall panel full life cycle carbon emission calculation method Download PDFInfo
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- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 307
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- 238000004364 calculation method Methods 0.000 title claims abstract description 57
- 238000004321 preservation Methods 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 claims abstract description 97
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- 239000002699 waste material Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000005431 greenhouse gas Substances 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims 1
- 229910002091 carbon monoxide Inorganic materials 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910018503 SF6 Inorganic materials 0.000 description 1
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- 239000007789 gas Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000001272 nitrous oxide Substances 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a full life cycle carbon emission accounting method of a structural heat preservation integrated external wall panel, which comprises the following steps: establishing a structural heat preservation integrated external wall panel full life cycle carbon emission accounting model; calculating carbon emission in the production stage of the external wall panel; calculating carbon emission of the external wall panel in the transportation stage; calculating carbon emission of the external wall panel in the construction stage; calculating carbon emission in the dismantling and recycling stage of the external wall panel; and calculating the carbon emission of the structural heat preservation integrated external wall panel at the full life cycle stage according to the carbon emission of the external wall panel at each stage. According to the invention, the calculation is carried out from a plurality of stages of outer wall plate production, transportation, construction, demolition and recovery, the artificial carbon emission in the production and construction processes of the structural heat-preservation integrated outer wall plate and the carbon emission used by the template in the production process are considered, and meanwhile, the carbon emission in the construction and demolition recovery stages is considered, and the energy consumption and the carbon emission amount in each stage are analyzed by an emission coefficient method, so that the method is beneficial to understanding the carbon emission condition of each stage in the whole life of the structural heat-preservation integrated outer wall plate and lays a foundation for the proposal of the carbon reduction technology.
Description
Technical Field
The invention relates to the technical field of carbon emission, in particular to a full life cycle carbon emission calculation method of a structural heat preservation integrated external wall panel.
Background
The national standard building energy conservation and renewable energy utilization general Specification GB 55015-2021 also proposes a mandatory requirement for calculating the carbon emission of a building.
The carbon emission calculation method at the present stage mainly comprises the following steps: (1) a material balance algorithm; (2) an actual measurement method; (3) and (5) an emission coefficient method. The method (1) is a quantitative analysis method, and follows the principle that the mass conservation law is that the input amount is equal to the output amount, the calculation result of the method is accurate, but the input and output in the production process of products or services need to be analyzed in detail, the process is relatively complex, the workload is large, and the method is suitable for calculating the carbon emission in the macroscopic field. The method (2) adopts a statistical measuring and calculating method for measuring and calculating the total gas emission amount by monitoring tools or measuring facilities and adopting national environmental protection department data, so that the result is reliable, but the method is limited by acquisition conditions, the data acquisition is difficult, a large amount of manpower and material resources are required to be input, and the method can only aim at research objects in the microscopic field. The method (3) adopts the product of the carbon source data and the emission factors of the specific countries to calculate the carbon emission, is suitable for estimating the long-term trend of the carbon emission and calculating the micro carbon emission, has relatively accurate accounting result and is more in line with the actual situation. The method has clear measuring and calculating thought and simpler data acquisition, and is the most commonly used method for measuring and calculating the carbon emission in the world at present.
In the aspect of the standard, GB/T51366 'building carbon emission calculation standard' is issued in China, and relevant regulations are made for carbon emission calculation of the whole life of a building including building material production, transportation and construction stages. At present, an ultralow energy consumption building with the heat transfer coefficient of the outer wall less than or equal to 0.4W/(m < 2 >. K) is becoming a development trend of building energy conservation, and a prefabricated external wall board (namely a structural heat preservation integrated external wall board) of a new enclosure system is an important component of the ultralow energy consumption building. Compared with the traditional external heat preservation system, the heat preservation integrated external wall panel with the structure is greatly popularized in the current national province, can reduce raw material energy consumption, improve energy utilization efficiency and construction efficiency, and ensure safe and durable service life, so that the comprehensive carbon emission level is low, the realization of a double-carbon target in the early stage is facilitated, and the heat preservation integrated external wall panel has become a main development trend of an external building enclosure system.
The structural heat-preservation integrated external wall panel is used as an important component for energy conservation and carbon reduction in the whole life of a general and ultra-low energy-consumption building, an accounting method and a related database are not established for the total life carbon emission accounting at present, and the carbon emission of the existing computing method cannot be accurately calculated. The carbon emission accounting basis, accounting boundary and accounting method of the building structure heat preservation integrated outer wall system are defined, and the method has a guiding effect on providing effective emission reduction strategies of all stages of the building full life cycle.
Disclosure of Invention
The invention provides a method for calculating the carbon emission of the whole life cycle of an external wall panel integrated with heat preservation of a structure, which aims to solve the problem of lack of the method for calculating the carbon emission of the whole life cycle of the prefabricated external wall panel of a new enclosure system.
The problems to be solved can be implemented by the following technical scheme:
the invention provides a full life cycle carbon emission accounting method of a structural heat preservation integrated external wall panel, which comprises the following steps:
s1: establishing a structural heat preservation integrated external wall panel full life cycle carbon emission accounting model;
s2: calculating carbon emission in the production stage of the external wall panel;
s3: calculating carbon emission of the external wall panel in the transportation stage;
s4: calculating carbon emission of the external wall panel in the construction stage;
s5: calculating carbon emission in the dismantling and recycling stage of the external wall panel;
s6: and calculating the carbon emission of the structural heat preservation integrated external wall panel at the full life cycle stage according to the carbon emission of the external wall panel at each stage.
Preferably, in step S1, an emission factor method is used to build a full life cycle carbon emission accounting model of the structural heat preservation integrated external wall panel, and the basic calculation formula of the emission factor method is as follows:
E＝∑Q×EF
wherein E is structural heat preservation integrated external wall board CO 2 Emission, Q is activity level, the activity level data is quantized activity causing greenhouse gas emission, EF is emission factor, namely CO corresponding to each unit activity level 2 Discharge amount.
Preferably, the structural heat preservation integrated external wall panel full life cycle carbon emission accounting model in step S1 includes an external wall panel production stage, a transportation stage, a construction stage, a demolition stage and a recovery stage, and the calculation formula is as follows:
C QB ＝C sc +C ys +C sg +C cc +C hs
wherein C is QB Integrated thermal insulation external wall panel with unit structure and full life cycle carbon emission (kgCO) 2 e/m 3 )，C sc Carbon emission (kgCO) of unit external wall panel building material production stage 2 e/m 3 )，C ys Carbon emissions per external wall panel transportation (kgCO) 2 e/m 3 )，C sg Carbon emission (kgCO) in unit external wall panel construction process 2 e/m 3 )，C cc Carbon emissions (kgCO) for unit exterior wallboard removal process 2 e/m 3 )，C hs Carbon emissions (kgCO) for unit external wall panel recovery process 2 e/m 3 )。
Preferably, the carbon emission in the production stage of the external wall panel in step S2 is composed of raw material introduced carbon emission, raw material transportation carbon emission, production energy consumption carbon emission and chemical reaction carbon emission in the production process, and the calculation formula is as follows:
C sc ＝C K +C G +C N +C H +C Z +C R
wherein C is sc Carbon emissions (kgCO) for unit external wall panel production stage 2 e/m 3 )，C K Carbon emission (kgCO) in raw material production process of unit external wall panel 2 e/m 3 )，C G Carbon emission (kgCO) in raw material transportation process of unit external wall panel 2 e/m 3 )，C N Energy consumption carbon emission (kgCO) in unit external wall panel production process 2 e/m 3 )，C H Direct carbon emissions (chemical reactions induced carbon emissions) in unit external wall panel production (kgCO) 2 e/m 3 )，C Z Turnover material carbon emission (kgCO) in unit external wall panel production process 2 e/m 3 )，C R Artificial carbon emission (kgCO) in unit external wall panel production process 2 e/m 3 )。
More preferably, carbon emissions C from raw material production process in unit external wall panel K The calculation formula is determined by the consumption of each raw material and the corresponding carbon emission factor:
wherein C is K Carbon emission (kgCO) in raw material production process of unit external wall panel 2 e/m 3 )，M i The usage amount (t) of the i-class raw materials in the unit external wall panel; EF (electric F) i,K Carbon emission factor (kgCO) for production process of class i raw material 2 e/unit dose).
More preferably, carbon emissions C during raw material transportation in unit external wall panel G The method is determined by the consumption of each raw material, the transportation distance, the transportation mode and the corresponding carbon emission factor, and the calculation formula is as follows:
wherein C is G Carbon emission (kgCO) in raw material transportation process of unit external wall panel 2 e/m 3 )，M i The dosage (t) of the i-class raw materials in the unit external wall panel is H i Is the average transport distance (km) of the i-class raw materials in the unit external wall panel, EF i,G In the transport mode of the i-class raw materials in the unit external wall panel, the unit weight transport distance carbon emission factor (kgCO) 2 e/(t·km))。
More preferably, the energy consumption carbon emission C in the production process in the unit external wall panel N From various kinds in the production processThe energy consumption and the corresponding carbon emission factor are determined, and the calculation formula is as follows:
wherein C is N Energy consumption carbon emission (kgCO) in unit external wall panel production process 2 e/m 3 )，E i,N Is the total energy consumption (t), k of the class i i Is the i-class energy carbon emission factor (kgCO) 2 e/t), N is the yield (m) of the building material product 3 )。
More preferably, direct carbon emissions C in the production process in unit external wall panels H The carbonate content and the carbonate carbon emission factor in the production process are determined, and the calculation formula is as follows:
wherein C is H Direct carbon emission (kgCO) in unit external wall panel production process 2 e/m 3 )，Q i The content of the i-type carbonate in the unit external wall panel,
is a class i carbonate carbon emission factor.
More preferably, the turnover material carbon emission C in the production process in the unit external wall panel Z The turnover material carbon emission factor, the consumption and the turnover times used in the production process are determined, the turnover material is an aluminum template used in the production process of the external wall panel, and the like, and the calculation formula is as follows:
wherein C is Z Direct carbon emission (kgCO) in unit external wall panel production process 2 e/m 3 )，P i Is the dosage (t) of the i-type turnover material in the unit external wall panel, EF Z,i Carbon emission factor (kgCO) for class i transfer material 2 e/unit dosage), li is the turnover number (times) of the class i turnover material)。
More preferably, artificial carbon emission C in production process in unit external wall panel R The number of workers, the annual working time, the artificial carbon emission factor and the annual output in the production process are determined, and the calculation formula is as follows:
wherein C is R Artificial carbon emission (kgCO) in unit external wall panel production process 2 e/m 3 )，R sc Is the number of workers (people) and EF in the production process of the external wall panel R Is artificial carbon emission factor (kgCO) 2 e/day of the industry), T sc For each worker working time (day) each year, N is the annual output (m) of the external wall panel 3 )。
Preferably, in the step S3, the carbon emission in the transportation stage of the external wall panel is determined by the transportation distance from the production site of the prefabricated external wall panel to be transported to the construction site, the transportation mode and the corresponding carbon emission factor, and the calculation formula is as follows:
C ys ＝∑H·EF
wherein C is ys Carbon emissions per external wall panel transportation (kgCO) 2 e/m 3 ) H is the average transportation distance (km) of the prefabricated external wall panel, EF is the carbon emission factor (kgCO) per unit weight transportation distance in the prefabricated external wall panel transportation mode 2 e/(t·km))。
Preferably, in the step S4, the carbon emission of the external wall panel in the construction stage is determined by the energy type, the energy consumption, the energy carbon emission factor, the work type, the number of workers, the working time and the artificial carbon emission factor consumed in the construction process, and the calculation formula is as follows:
wherein C is sg Carbon emissions (kgCO) for unit external wall panel construction stage 2 e/m 3 )，E i,S For the energy consumption (t), EF of class i in the construction stage S,i Is the i-class energy carbon emission factor (kgCO) 2 e/t)，R j,sg For the number of workers (people) in class j in the construction stage of the external wall panel, EF R Is artificial carbon emission factor (kgCO) 2 e/day of the industry), T j,sg Working time (day) of each worker construction stage for j kinds of work, N sg Is the construction quantity (m) of the construction stage of the external wall panel 3 )。
Preferably, the carbon emission in the demolishing and recycling stage of the external wall panel in the step S5 is determined by demolishing operation carbon emission, demolishing object transportation carbon emission and demolishing object recycling carbon emission, and the calculation formula is as follows:
C cc ＝C D +C Y +C C
wherein C is cc Carbon emissions per external wallboard stage (kgCO) 2 e/m 3 )，C D Carbon emissions (kgCO) for unit exterior wallboard removal operations 2 e/m 3 )，C Y Carbon emissions (kgCO) for unit exterior wallboard demolition transport 2 e/m 3 )，C C Carbon emission (kgCO) recovery for unit exterior wallboard demolition 2 e/m 3 )。
More preferably, the demolition work carbon emission C in the unit exterior wallboard D The energy source type, the energy source consumption, the energy carbon emission factor, the work species, the number of workers, the working time and the artificial carbon emission factor consumed in the dismantling process are determined; the demolishing operation can be regarded as the reverse process of the construction stage, the generated carbon emission is calculated according to 90% of the generated carbon emission in the construction stage, and the calculation formula is as follows:
C D ＝C sg ×90％
wherein C is D Carbon emissions (kgCO) for unit exterior wallboard removal operations 2 e/m 3 )，C sg Carbon emissions (kgCO) for unit external wall panel construction stage 2 e/m 3 )。
More preferably, the demolition transport carbon emissions C in the unit exterior wallboard Y The method is determined by the demolishd material quantity, the transportation distance and the transportation mode carbon emission factor; the demolition transportation can be regarded as the reverse process of the transportation stage of the external wall panel, the generated carbon emission is calculated according to 90% of the generated carbon emission in the transportation stage, and the calculation formula is as follows:
C Y ＝C ys ×90％
wherein C is Y Carbon emissions (kgCO) for unit exterior wallboard demolition transport 2 e/m 3 )，C ys Carbon emissions (kgCO) for unit external wall panel transportation stage 2 e/m 3 )。
More preferably, the demolition recovery carbon emissions C in the unit exterior wallboard C The method is determined by the recyclable building material amount, the recyclable building material waste utilization rate and the recyclable building material carbon emission factor, and the calculation formula is as follows:
wherein C is C Carbon emission (kgCO) recovery for unit exterior wallboard demolition 2 e/m 3 )，C i The recovery quantity (t) and eta of i building materials of the external wall panel are as unit i Is the waste utilization rate of i building materials, EF i,C Is i kinds of building material carbon emission factors (kgCO) 2 e/m 3 )。
Compared with the prior art, the invention has the beneficial effects that: according to the method for calculating the carbon emission of the whole life cycle of the structural heat-preservation integrated external wall panel, disclosed by the invention, the proposed calculation theory gives consideration to the artificial carbon emission in the production and construction processes of the structural heat-preservation integrated external wall panel and the carbon emission used by the template in the production process, and simultaneously considers the carbon emission in the construction, dismantling and recycling stages of the structural heat-preservation integrated external wall panel, so that more accurate carbon emission factors and carbon emission amounts in all stages of the structural heat-preservation integrated external wall panel can be calculated, the situation of the carbon emission in all stages of the whole life cycle of the structural heat-preservation integrated external wall panel can be known, and a foundation is laid for the proposal of a carbon reduction technology.
Detailed Description
The technical scheme of the invention is explained below by means of examples.
Example 1
The embodiment provides a full life cycle carbon emission accounting method of a structural heat preservation integrated external wall panel, which comprises the following steps:
s1, establishing a full life cycle carbon emission accounting method of the structural heat preservation integrated external wall panel. The calculated carbon emissions of this example refer to carbon dioxide asQuantity (CO) 2 e) Is the sum of six types of greenhouse gases, including carbon dioxide, methane, nitrous oxide, sulfur hexafluoride, hydrofluorocarbon and perfluorocarbon. The method for calculating the carbon emission of the whole life cycle of the structural heat-preservation integrated external wall panel is established by using an emission factor method, and the basic calculation formula of the emission factor method is as follows:
E＝∑Q×EF
wherein E is CO 2 Emission, Q is activity level, the activity level data is quantized activity causing greenhouse gas emission, EF is emission factor, namely CO corresponding to each unit activity level 2 Discharge amount.
The structural heat preservation integrated external wall panel full life cycle carbon emission accounting method comprises an external wall panel production stage, a transportation stage, a construction stage, a dismantling stage and a recovery stage, wherein the calculation formula is as follows:
C QB ＝C sc +C ys +C sg +C cc +C hs
wherein C is QB Integrated thermal insulation external wall panel with unit structure and full life cycle carbon emission (kgCO) 2 e/m 3 )，C sc Carbon emission (kgCO) of unit external wall panel building material production stage 2 e/m 3 )，C ys Carbon emissions per external wall panel transportation (kgCO) 2 e/m 3 )，C sg Carbon emission (kgCO) in unit external wall panel construction process 2 e/m 3 )，C cc Carbon emissions (kgCO) for unit exterior wallboard removal process 2 e/m 3 )，C hs Carbon emissions (kgCO) for unit external wall panel recovery process 2 e/m 3 )。
The carbon emission of the external wall panel in the production stage consists of raw material introduced carbon emission, raw material transportation carbon emission, production energy consumption carbon emission and chemical reaction carbon emission in the production process, and the calculation formula is as follows:
C sc ＝C K +C G +C N +C H +C Z +C R
wherein C is sc Carbon emissions (kgCO) for unit external wall panel production stage 2 e/m 3 )，C K Carbon emission (kgCO) in raw material production process of unit external wall panel 2 e/m 3 )，C G Carbon emission (kgCO) in raw material transportation process of unit external wall panel 2 e/m 3 )，C N Energy consumption carbon emission (kgCO) in unit external wall panel production process 2 e/m 3 )，C H Direct carbon emissions (chemical reactions induced carbon emissions) in unit external wall panel production (kgCO) 2 e/m 3 )，C Z Turnover material carbon emission (kgCO) in unit external wall panel production process 2 e/m 3 )，C R Artificial carbon emission (kgCO) in unit external wall panel production process 2 e/m 3 )。
Carbon emission C in raw material production process of unit external wall panel K The calculation formula is determined by the consumption of each raw material and the corresponding carbon emission factor:
wherein C is K Carbon emission (kgCO) in raw material production process of unit external wall panel 2 e/m 3 )，M i The usage amount (t) of the i-class raw materials in the unit external wall panel; EF (electric F) i,K Carbon emission factor (kgCO) for production process of class i raw material 2 e/unit dose).
Carbon emission C in raw material transportation process of unit external wall panel G The method is determined by the consumption of each raw material, the transportation distance, the transportation mode and the corresponding carbon emission factor, and the calculation formula is as follows:
wherein C is G Carbon emission (kgCO) in raw material transportation process of unit external wall panel 2 e/m 3 )，M i The dosage (t) of the i-class raw materials in the unit external wall panel is H i Is the average transport distance (km) of the i-class raw materials in the unit external wall panel, EF i,G In the transport mode of the i-class raw materials in the unit external wall panel, the unit weight transport distance carbon emission factor (kgCO) 2 e/(t·km))。
Carbon emission C of energy consumption in production process in unit external wall panel N The method is determined by the consumption of various energy sources and corresponding carbon emission factors in the production process, and the calculation formula is as follows:
wherein C is N Energy consumption carbon emission (kgCO) in unit external wall panel production process 2 e/m 3 )，E i,N Is the total energy consumption (t), k of the class i i Is the i-class energy carbon emission factor (kgCO) 2 e/t), N is the yield (m) of the building material product 3 )。
Direct carbon emission C in production process in unit external wall panel H The carbonate content and the carbonate carbon emission factor in the production process are determined, and the calculation formula is as follows:
wherein C is H Direct carbon emission (kgCO) in unit external wall panel production process 2 e/m 3 )，Q i The content of the i-type carbonate in the unit external wall panel,
is a class i carbonate carbon emission factor.
Turnover material carbon emission C in production process in unit external wall panel Z The turnover material carbon emission factor, the consumption and the turnover times used in the production process are determined, the turnover material is an aluminum template used in the production process of the external wall panel, and the like, and the calculation formula is as follows:
wherein C is Z Direct carbon emission (kgCO) in unit external wall panel production process 2 e/m 3 )，P i Is the dosage (t) of the i-type turnover material in the unit external wall panel, EF Z,i Carbon emission factor (kgCO) for class i transfer material 2 e/unit dosage), li is the turnover number (times) of the class i turnover material.
Artificial carbon emission C in production process in unit external wall panel R The number of workers, the annual working time, the artificial carbon emission factor and the annual output in the production process are determined, and the calculation formula is as follows:
wherein C is R Artificial carbon emission (kgCO) in unit external wall panel production process 2 e/m 3 )，R sc Is the number of workers (people) and EF in the production process of the external wall panel R Is artificial carbon emission factor (kgCO) 2 e/day of the industry), T sc For each worker working time (day) each year, N is the annual output (m) of the external wall panel 3 )。
The carbon emission of the external wall panel in the transportation stage is determined by the transportation distance from the production place to the construction site of the prefabricated external wall panel to be transported, the transportation mode and the corresponding carbon emission factor, and the calculation formula is as follows:
C ys ＝∑H·EF
wherein C is ys Carbon emissions per external wall panel transportation (kgCO) 2 e/m 3 ) H is the average transportation distance (km) of the prefabricated external wall panel, EF is the carbon emission factor (kgCO) per unit weight transportation distance in the prefabricated external wall panel transportation mode 2 e/(t·km))。
The carbon emission of the external wall panel in the construction stage is determined by the type of energy consumed in the construction process, the energy consumption, the carbon emission factor of energy, the type of work, the number of workers, the working time and the artificial carbon emission factor, and the calculation formula is as follows:
wherein C is sg Carbon emissions (kgCO) for unit external wall panel construction stage 2 e/m 3 )，E i,S For the energy consumption (t), EF of class i in the construction stage S,i For class i energySource carbon emission factor (kgCO) 2 e/t)，R j,sg For the number of workers (people) in class j in the construction stage of the external wall panel, EF R Is artificial carbon emission factor (kgCO) 2 e/day of the industry), T j,sg Working time (day) of each worker construction stage for j kinds of work, N sg Is the construction quantity (m) of the construction stage of the external wall panel 3 )。
The carbon emission of the outer wall plate in the demolishing and recycling stage is determined by the carbon emission of demolishing operation, the carbon emission of demolishing object transportation and the carbon emission of demolishing object recycling, and the calculation formula is as follows:
C cc ＝C D +C Y +C C
wherein C is cc Carbon emissions per external wallboard stage (kgCO) 2 e/m 3 )，C D Carbon emissions (kgCO) for unit exterior wallboard removal operations 2 e/m 3 )，C Y Carbon emissions (kgCO) for unit exterior wallboard demolition transport 2 e/m 3 )，C C Carbon emission (kgCO) recovery for unit exterior wallboard demolition 2 e/m 3 )。
Carbon emission C of demolition operation in unit external wall panel D Is determined by the type of energy consumed in the dismantling process, the energy consumption, the energy carbon emission factor, the work species, the number of workers, the working time and the artificial carbon emission factor. The demolishing operation can be regarded as the reverse process of the construction stage, the generated carbon emission is calculated according to 90% of the generated carbon emission in the construction stage, and the calculation formula is as follows:
C D ＝C sg ×90％
wherein C is D Carbon emissions (kgCO) for unit exterior wallboard removal operations 2 e/m 3 )，C sg Carbon emissions (kgCO) for unit external wall panel construction stage 2 e/m 3 )。
Demolition transport carbon emissions C in unit exterior wallboard Y Is determined by the demolition amount, the transportation distance and the transportation mode carbon emission factor. The demolition transportation can be regarded as the reverse process of the transportation stage of the external wall panel, the generated carbon emission is calculated according to 90% of the generated carbon emission in the transportation stage, and the calculation formula is as follows:
C Y ＝C ys ×90％
wherein C is Y Carbon emissions (kgCO) for unit exterior wallboard demolition transport 2 e/m 3 )，C ys Carbon emissions (kgCO) for unit external wall panel transportation stage 2 e/m 3 )。
Recovering carbon emission C from demolishd matter in unit external wall panel C The method is determined by the recyclable building material amount, the recyclable building material waste utilization rate and the recyclable building material carbon emission factor, and the calculation formula is as follows:
wherein C is C Carbon emission (kgCO) recovery for unit exterior wallboard demolition 2 e/m 3 )，C i The recovery quantity (t) and eta of i building materials of the external wall panel are as unit i Is the waste utilization rate of i building materials, EF i,C Is i building material carbon emission factors.
The foregoing is merely illustrative of the principles of the invention and various modifications and changes may be made by those skilled in the art without departing from the general inventive concept and such changes and modifications are intended to be within the scope of the invention as claimed.
Claims (9)
1. The full life cycle carbon emission accounting method of the structural heat preservation integrated external wall panel is characterized by comprising the following steps of:
s1: establishing a structural heat preservation integrated external wall panel full life cycle carbon emission accounting model;
s2: calculating carbon emission in the production stage of the external wall panel;
s3: calculating carbon emission of the external wall panel in the transportation stage;
s4: calculating carbon emission of the external wall panel in the construction stage;
s5: calculating carbon emission in the dismantling and recycling stage of the external wall panel;
s6: and calculating the carbon emission of the structural heat preservation integrated external wall panel at the full life cycle stage according to the carbon emission of the external wall panel at each stage.
2. The method for calculating the total life cycle carbon emission of the structural heat-preserving integrated external wall panel according to claim 1, wherein in the step S1, an emission factor method is used to build a structural heat-preserving integrated external wall panel total life cycle carbon emission calculation model, and a basic calculation formula of the emission factor method is as follows:
E＝∑Q×EF
wherein E is structural heat preservation integrated external wall board CO 2 Emission, Q is activity level, the activity level data is quantized activity causing greenhouse gas emission, EF is emission factor, namely CO corresponding to each unit activity level 2 Discharge amount.
3. The method for calculating the full life cycle carbon emission of the structural heat-preserving integrated external wall panel according to claim 1, wherein the structural heat-preserving integrated external wall panel full life cycle carbon emission calculation model in the step S1 comprises an external wall panel production stage, a transportation stage, a construction stage, a dismantling stage and a recovery stage, and the calculation formula is as follows:
C QB ＝e sc +C ys +C sg +C cc +C hs
wherein C is QB Integrated thermal insulation external wall panel with unit structure and full life cycle carbon emission and kgCO (carbon monoxide) 2 e/m 3 ；C sc Carbon emission and kgCO in unit external wall panel building material production stage 2 e/m 3 ；C ys Carbon emission and kgCO in unit external wall board transportation process 2 e/m 3 ；C sg Carbon emission and kgCO in unit external wall panel construction process 2 e/m 3 ；C cc Carbon emission and kgCO in unit external wall panel dismantling process 2 e/m 3 ；C hs Carbon emission and kgCO in unit external wall panel recovery process 2 e/m 3 。
4. The method for accounting the carbon emission of the whole life cycle of the structural heat preservation integrated external wall panel according to claim 1, wherein the carbon emission of the external wall panel in the production stage in the step S2 is composed of raw material introduced carbon emission, raw material transportation carbon emission, production energy consumption carbon emission and chemical reaction carbon emission in the production process, and the calculation formula is as follows:
C sc ＝C K +C G +C N +C H +C z +C R
wherein C is sc Carbon emission and kgCO in unit external wall panel production stage 2 e/m 3 ；C K Carbon emission and kgCO in raw material production process of unit external wall panel 2 e/m 3 ；C G Carbon emission and kgCO in raw material transportation process of unit external wall panel 2 e/m 3 ；C N Is energy consumption carbon emission and kgCO in the production process of unit external wall panel 2 e/m 3 ；C H Direct carbon emission and kgCO in unit external wall panel production process 2 e/m 3 ；C Z Turnover material carbon emission in unit external wall panel production process, kgCO 2 e/m 3 ；C R Is artificial carbon emission and kgCO in the production process of unit external wall boards 2 e/m 3 。
5. The method for accounting carbon emission in full life cycle of structural insulation integrated external wall panel according to claim 4, wherein carbon emission C in raw material production process of unit external wall panel K The calculation formula is determined by the consumption of each raw material and the corresponding carbon emission factor:
wherein C is K Carbon emission and kgCO in raw material production process of unit external wall panel 2 e/m 3 ；M i The consumption of the i-class raw materials in the unit external wall panel is t; EF (electric F) i,K For the production process of i-class raw materials, the carbon emission factor, kgCO 2 e/unit dose;
carbon emission C in raw material transportation process of unit external wall panel G The method is determined by the consumption of each raw material, the transportation distance, the transportation mode and the corresponding carbon emission factor, and the calculation formula is as follows:
wherein C is G Carbon emission and kgCO in raw material transportation process of unit external wall panel 2 e/m 3 ；M i The consumption of the i-class raw materials in the unit external wall panel is t; h i The average transport distance of the i-class raw materials in the unit external wall panel is km; EF (electric F) i,G In the transportation mode of i-class raw materials in unit external wall panel, the unit weight transportation distance is equal to the carbon emission factor, kgCO 2 e/(t·km)；
Carbon emission C of energy consumption in production process in unit external wall panel N The method is determined by the consumption of various energy sources and corresponding carbon emission factors in the production process, and the calculation formula is as follows:
wherein C is N Is energy consumption carbon emission and kgCO in the production process of unit external wall panel 2 e/m 3 ；E i,N The total energy consumption of the i types is t; k (k) i Is i-type energy carbon emission factor, kgCO 2 e/t; n is the yield of building material products, m 3 ；
Direct carbon emission C in production process in unit external wall panel H The carbonate content and the carbonate carbon emission factor in the production process are determined, and the calculation formula is as follows:
wherein C is H Direct carbon emission and kgCO in unit external wall panel production process 2 e/m 3 ；Q i The content of the i-type carbonate in the unit external wall panel; EF (electric F) CO3,i Is a class i carbonate carbon emission factor;
turnover material carbon emission C in production process in unit external wall panel Z From the carbon emission factor, the dosage and the like of the turnover materials used in the production processTurnover times are determined, the turnover materials are aluminum templates and the like used in the production process of the external wall boards, and the calculation formula is as follows:
wherein C is Z Direct carbon emission and kgCO in unit external wall panel production process 2 e/m 3 ；P i The dosage of the i-type turnover material in the unit external wall panel is t; EF (electric F) Z,i Is i-class turnover material carbon emission factor, kgCO 2 e/unit dose; li is the turnover number of class i turnover materials, and the turnover number is twice;
artificial carbon emission C in production process in unit external wall panel R The number of workers, the annual working time, the artificial carbon emission factor and the annual output in the production process are determined, and the calculation formula is as follows:
wherein C is R Is artificial carbon emission and kgCO in the production process of unit external wall boards 2 e/m 3 ；R sc The number of workers in the production process of the external wall panel is the number of people; EF (electric F) R As artificial carbon emission factor, kgCO 2 e/day of work; t (T) sc Working time and day of each worker each year; n is the annual output of the external wall panel, m 3 。
6. The method for calculating the carbon emission of the whole life cycle of the structural heat-insulating integrated external wall panel according to claim 1, wherein in the step S3, the carbon emission of the transportation stage of the external wall panel is determined by the transportation distance from the production place to the construction site of the prefabricated external wall panel to be transported, the transportation mode and the corresponding carbon emission factor, and the calculation formula is as follows:
C ys ＝∑H·EF
wherein C is ys Carbon emission and kgCO in unit external wall board transportation process 2 e/m 3 The method comprises the steps of carrying out a first treatment on the surface of the H is the average transportation distance of prefabricated external wall panelsSeparating from km; EF is the carbon emission factor per unit weight transportation distance and kgCO in the prefabricated external wall panel transportation mode 2 e/(t·km)。
7. The method for calculating the carbon emission of the whole life cycle of the structural heat-insulating integrated external wall panel according to claim 1, wherein in the step S4, the carbon emission of the construction stage of the external wall panel is determined by the type of energy consumed in the construction process, the energy consumption, the energy carbon emission factor, the work type, the number of workers, the working time and the artificial carbon emission factor, and the calculation formula is as follows:
wherein C is sg Carbon emission and kgCO in unit external wall panel construction stage 2 e/m 3 ；E i,S The energy consumption of class i in the construction stage is t; EF (electric F) S,i Is i-type energy carbon emission factor, kgCO 2 e/t；R j,sg The number of workers is j class of workers in the construction stage of the outer wall plate; EF (electric F) R As artificial carbon emission factor, kgCO 2 e/day of work; t (T) j,sg Working time and day of construction stage of each worker for j kinds of work species; n (N) sg Is the construction quantity, m, of the construction stage of the external wall panel 3 。
8. The method for accounting the carbon emission of the whole life cycle of the structural heat preservation integrated external wall panel according to claim 1, wherein the carbon emission of the demolition recovery stage of the external wall panel in the step S5 is determined by demolition operation carbon emission, demolition transportation carbon emission and demolition recovery carbon emission, and the calculation formula is:
C cc ＝C D +C y +C C
wherein C is cc Is the carbon emission of the external wall plate stage of the unit and kgCO 2 e/m 3 ；C D Carbon emission for unit external wall panel dismantling operation and kgCO 2 e/m 3 ；C Y Carbon emission, kgCO, is transported for unit external wall panel demolishs 2 e/m 3 ；C C Recovery of carbon emissions, kgCO, for unit exterior wallboard demolishs 2 e/m 3 。
9. The method for accounting for full life cycle carbon emissions of a structural insulated integrated exterior wall panel according to claim 8, wherein carbon emissions C for demolition operations in a unit exterior wall panel D The energy source type, the energy source consumption, the energy carbon emission factor, the work species, the number of workers, the working time and the artificial carbon emission factor consumed in the dismantling process are determined; the demolishing operation can be regarded as the reverse process of the construction stage, the generated carbon emission is calculated according to 90% of the generated carbon emission in the construction stage, and the calculation formula is as follows:
C D ＝C sg ×90％
wherein C is D Carbon emission for unit external wall panel dismantling operation and kgCO 2 e/m 3 ；C sg Carbon emission and kgCO in unit external wall panel construction stage 2 e/m 3 ；
Demolition transport carbon emissions C in unit exterior wallboard Y The method is determined by the demolishd material quantity, the transportation distance and the transportation mode carbon emission factor; the demolition transportation can be regarded as the reverse process of the transportation stage of the external wall panel, the generated carbon emission is calculated according to 90% of the generated carbon emission in the transportation stage, and the calculation formula is as follows:
C Y ＝C ys ×90％
wherein C is Y Carbon emission, kgCO, is transported for unit external wall panel demolishs 2 e/m 3 ；C ys Carbon emission in unit external wall panel transportation stage and kgCO 2 e/m 3 ；
Recovering carbon emission C from demolishd matter in unit external wall panel C The method is determined by the recyclable building material amount, the recyclable building material waste utilization rate and the recyclable building material carbon emission factor, and the calculation formula is as follows:
wherein C is C Recovery of carbon emissions, kgCO, for unit exterior wallboard demolishs 2 e/m 3 ；C i The recovery quantity of i building materials of the external wall panel is t; η (eta) i Is the waste utilization rate of i building materials, EF i,C Is i building material carbon emission factors, kgCO 2 e/m 3 。
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