A method for accurately accounting for carbon emissions in construction of a hybrid building structure

Abstract

The present application relates to carbon emission accounting technical field, specifically to a kind of building hybrid structure construction carbon emission accurate accounting method, comprising the following steps: step one, according to building type, obtain the parameter data of building hybrid structure;Step two, construct life cycle carbon emission model;Step three, construct carbon emission factor library model;Step four, calculate building material production stage carbon emission, traffic transportation stage carbon emission, construction stage carbon emission, operation and maintenance stage carbon emission, and waste dismantling stage stage carbon emission;Step five, calculate total life cycle carbon emission amount.The present application calculates by the material list of building hybrid structure, construction technology parameter, operation and maintenance and dismantling recycling data, combined with the carbon emission of five stages of building material production, traffic transportation, construction, operation and maintenance and waste dismantling, improves the accuracy of building carbon emission accounting result.

Description

Technical Field

[0001] This invention relates to the field of carbon emission accounting technology, specifically to a method for accurate carbon emission accounting of building hybrid structures. Background Technology

[0002] Since the alarm bells of global warming were sounded in 1988, the environmental problems caused by the continuous increase of greenhouse gases such as carbon dioxide have attracted increasing attention, and the development of a low-carbon economy has become an international consensus. Accurately measuring carbon emission performance in various sectors is of great practical significance for achieving low-carbon urbanization. However, existing methods for accurately calculating carbon emissions from mixed-structure building construction can only represent the carbon emissions of a building at a certain stage or period, and research on the carbon emission patterns of buildings throughout their entire life cycle is still insufficient, resulting in inaccurate carbon emission calculation results. Therefore, a method for accurately calculating carbon emissions from mixed-structure building construction was designed. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned shortcomings by providing a method for accurately calculating carbon emissions from the construction of hybrid building structures. This method calculates carbon emissions by combining the carbon emissions from five stages: building material production, transportation, construction, operation and maintenance, and demolition and recycling data. This improves the accuracy of building carbon emission calculation results.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A method for accurately calculating carbon emissions from the construction of hybrid building structures includes the following steps:

[0006] Step 1: Based on the building type, obtain the material list, construction process parameters, operation and maintenance, and demolition and recycling data for the mixed-structure building.

[0007] Step 2: Construct a full life cycle carbon emission model, covering five stages: building material production, transportation, construction, operation and maintenance, and demolition.

[0008] Step 3: Construct a carbon emission factor library model;

[0009] The carbon emission factor library includes carbon emission factors for non-metallic building materials, carbon emission factors for metallic building materials, carbon emission factors for prefabricated components, carbon emission factors for energy, carbon emission factors for transportation, carbon emission factors for construction machinery, and carbon emission factors for human activities.

[0010] Step 4: Calculate carbon emissions during the building materials production stage. Carbon emissions during the transportation phase Carbon emissions during the construction phase Carbon emissions during operation and maintenance phase Carbon emissions during the demolition and abandonment phase ;

[0011] Step 5: Calculate the total carbon emissions over the entire life cycle;

[0012] Calculate the total life-cycle carbon emissions based on the results of step four and formula 1. :

[0013] (Formula 1).

[0014] Furthermore, in step three, the carbon emission factor library is obtained based on the parameters in the "Building Carbon Emission Calculation Standard" (GB / T51366-2019).

[0015] Furthermore, in step four, the carbon emissions during the building materials production stage... According to formula 2:

[0016] (Formula 2);

[0017] in, This represents the energy consumption of mechanical equipment required in the production process of the i-th type of building material, in units of fossil energy kg or electricity kW·h;

[0018] This represents the carbon emission factor of fossil energy or electricity consumed by the mechanical equipment required in the production process of the i-th type of building material, in units of kg·kg⁻¹ or kg·kW⁻¹·h⁻¹.

[0019] The quantity of building materials required for the i-th type of building (unit: t or m3).

[0020] The carbon emission factor of the i-th material (unit: kg·t-1 or kg·m-3).

[0021] The consumption of prefabricated steel structure components of type i (unit: t);

[0022] Let be the carbon emission factor of the i-th type of prefabricated component (unit: kg·t⁻¹).

[0023] Furthermore, in step four, carbon emissions during the transportation phase... According to formula 3:

[0024] (Formula 3);

[0025] in, The material consumption for the eth type, calculated by volume (unit: m³). 3 );

[0026] W represents the volumetric capacity of a single transport trip by a truck or concrete mixer truck (unit: m³). 3 );

[0027] , The transport distances of building materials, calculated by volume and weight respectively (unit: km);

[0028] Diesel consumption per km for transport trucks or concrete mixer trucks (unit: L / km).

[0029] Carbon emission factor of diesel fuel in fossil fuels (unit: kgCO2 / L). The weight of building materials of category f (in tons).

[0030] The carbon emission factor (unit: kgCO2 ( / t·km) represents the transportation method used to transport the j-th type of building material.

[0031] Furthermore, in step four, carbon emissions during the construction phase... According to formula 4:

[0032] (Formula 4);

[0033] in, Let be the daily consumption of the i-th type of machine;

[0034] Let be the carbon emission factor (kgCO2 / shift) of the i-th type of machinery unit shift.

[0035] Labor consumption (work / day);

[0036] The carbon emission factor is artificial (kgCO2 / workday).

[0037] Furthermore, in step four, carbon emissions during the operation and maintenance phase... According to formula 5:

[0038] (Formula 5);

[0039] in, The building's total annual cooling load (kWh / a);

[0040] This refers to the rated energy consumption ratio of the air conditioner.

[0041] Carbon emission factor for electricity (kgCO2 / kWh);

[0042] The building's design service life (a);

[0043] Lighting power density value (W / m2) of the i-th type of room;

[0044] Let be the lighting area (m2) of the i-th type of room;

[0045] Let be the average annual lighting duration (h / a) of the i-th type of room;

[0046] The simultaneous use factor for the lighting fixtures is set to 0.5.

[0047] P represents a specific energy consumption (mW·h / kg·m).

[0048] The average annual operating time of the elevator (h);

[0049] The elevator's operating speed (m / s);

[0050] The elevator's rated load capacity (kg);

[0051] Elevator standby energy consumption (W);

[0052] The average annual standby time of the elevator (h);

[0053] D represents the central heating period (days);

[0054] Heat consumption during building heating (W / m2);

[0055] The total area of ​​the heating area (m2);

[0056] The carbon footprint factor of coal (kgCO2 / kg);

[0057] The calorific value of standard coal is taken as 8.14 × 10³ Wh / kg;

[0058] For boiler operating efficiency;

[0059] For the transmission efficiency of heating pipelines;

[0060] The consumption of the i-th type of building material required for maintenance and updates;

[0061] The carbon emission factor (kgCO2 / unit building material consumption) of the i-th building material required for maintenance and renewal.

[0062] Let represent the number of times the i-th type of building material is maintained and updated.

[0063] Furthermore, in step four, the carbon emissions during the decommissioning and dismantling phase... According to formula 6:

[0064] (Formula 6);

[0065] in, Let be the unit consumption (units) of the i-th type of demolition machinery.

[0066] The carbon emission factor per unit shift of the i-th type of demolition machinery (kgCO2 / shift);

[0067] Let be the weight (t) of the i-th type of construction waste;

[0068] Let be the transportation distance (km) for the i-th type of construction waste;

[0069] Let [kgCO2 / (t·km)] be the carbon emission factor per unit weight transport distance under the i-th mode of transportation;

[0070] For the no-load return coefficient, take... =1.67.

[0071] The beneficial effects of this invention are:

[0072] In practical applications, the process includes: Step 1, obtaining parameter data for the mixed-use building structure based on its type; Step 2, constructing a full life-cycle carbon emission model; Step 3, constructing a carbon emission factor library model; Step 4, calculating carbon emissions during the building material production stage, transportation stage, construction stage, operation and maintenance stage, and demolition stage; and Step 5, calculating the total carbon emissions over the entire life-cycle. This invention improves the accuracy of building carbon emission accounting results by combining the material list, construction process parameters, operation and maintenance, and demolition and recycling data of the mixed-use building structure with the carbon emissions from the five stages of building material production, transportation, construction, operation and maintenance, and demolition. Attached Figure Description

[0073] Figure 1 This is a flowchart illustrating the method steps of the present invention. Detailed Implementation

[0074] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0075] like Figure 1 As shown, a method for accurately calculating carbon emissions from the construction of hybrid building structures includes the following steps:

[0076] Step 1: Based on the building type, obtain the material list, construction process parameters, operation and maintenance, and demolition and recycling data for the mixed-structure building.

[0077] Step 2: Construct a full life cycle carbon emission model, covering five stages: building material production, transportation, construction, operation and maintenance, and demolition.

[0078] Step 3: Construct a carbon emission factor library model;

[0079] The carbon emission factor library includes carbon emission factors for non-metallic building materials, carbon emission factors for metallic building materials, carbon emission factors for prefabricated components, carbon emission factors for energy, carbon emission factors for transportation, carbon emission factors for construction machinery, and carbon emission factors for human activities.

[0080] Step 4: Calculate carbon emissions during the building materials production stage. Carbon emissions during the transportation phase Carbon emissions during the construction phase Carbon emissions during operation and maintenance phase Carbon emissions during the demolition and abandonment phase ;

[0081] Step 5: Calculate the total carbon emissions over the entire life cycle;

[0082] Calculate the total life-cycle carbon emissions based on the results of step four and formula 1. :

[0083] (Formula 1).

[0084] like Figure 1As shown, in step three, the carbon emission factor database is obtained based on the parameters in the "Building Carbon Emission Calculation Standard" (GB / T51366-2019). In this embodiment, the "Building Carbon Emission Calculation Standard" (GB / T51366-2019) provides the carbon emission factors of major building materials. This standard is based on the China Life Cycle Basic Database, which is one of the more mature databases in China and can ensure the authority and timeliness of the data.

[0085] like Figure 1 As shown, in step four, the carbon emissions during the building materials production stage... According to formula 2:

[0086] (Formula 2);

[0087] in, This represents the energy consumption of mechanical equipment required in the production process of the i-th type of building material, in units of fossil energy kg or electricity kW·h;

[0088] This represents the carbon emission factor of fossil energy or electricity consumed by the mechanical equipment required in the production process of the i-th type of building material, in units of kg·kg⁻¹ or kg·kW⁻¹·h⁻¹.

[0089] The quantity of building materials required for the i-th type of building (unit: t or m3).

[0090] The carbon emission factor of the i-th material (unit: kg·t-1 or kg·m-3).

[0091] The consumption of prefabricated steel structure components of type i (unit: t);

[0092] The carbon emission factor (unit: kg·t⁻¹) is for the i-th type of prefabricated component. In this embodiment, This refers to the consumption during the production of ordinary building materials. The consumption of steel structure components is measured by the carbon emissions during the building materials production stage. The process is broken down into two sub-stages: the production of ordinary building materials and the production of steel structure components, thereby reducing carbon emissions in the building materials production stage. The calculation accuracy.

[0093] like Figure 1 As shown, in step four, the carbon emissions during the transportation phase... According to formula 3:

[0094] (Formula 3);

[0095] in, The material consumption for the eth type, calculated by volume (unit: m³). 3 );

[0096] W represents the volumetric capacity of a single transport trip by a truck or concrete mixer truck (unit: m³). 3 );

[0097] , The transport distances of building materials, calculated by volume and weight respectively (unit: km);

[0098] Diesel consumption per km for transport trucks or concrete mixer trucks (unit: L / km).

[0099] Carbon emission factor of diesel fuel in fossil fuels (unit: kgCO2 / L). The weight of building materials of category f (in tons).

[0100] The carbon emission factor (unit: kgCO2 ( / t·km)) represents the transportation method used to transport the j-th type of building material. In this embodiment, Carbon emissions during the transportation of building materials, calculated by volume (unit: kg). The carbon emissions during the transportation of building materials are calculated by weight (unit: kg). This is achieved by measuring the carbon emissions during the transportation phase. The process is broken down into two sub-stages: carbon emissions during the transportation of building materials calculated by volume and carbon emissions during the transportation of building materials calculated by weight, thereby increasing carbon emissions during the transportation phase. The calculation accuracy.

[0101] like Figure 1 As shown, in step four, the carbon emissions during the construction phase... According to formula 4:

[0102] (Formula 4);

[0103] in, Let be the daily consumption of the i-th type of machine;

[0104] Let be the carbon emission factor (kgCO2 / shift) of the i-th type of machinery unit shift.

[0105] Labor consumption (work / day);

[0106] The carbon emission factor is artificial (kgCO2 / workday). In this embodiment, This refers to the amount of mechanical equipment consumed during the construction process. To reduce the carbon emissions during the construction phase, the amount of labor required for the construction process can be broken down into the consumption of machinery and equipment and the consumption of labor. The calculation accuracy.

[0107] like Figure 1 As shown, in step four, the carbon emissions during the operation and maintenance phase... According to formula 5:

[0108] (Formula 5);

[0109] in, The building's total annual cooling load (kWh / a);

[0110] This refers to the rated energy consumption ratio of the air conditioner.

[0111] Carbon emission factor for electricity (kgCO2 / kWh);

[0112] The building's design service life (a);

[0113] Lighting power density value (W / m2) of the i-th type of room;

[0114] Let be the lighting area (m2) of the i-th type of room;

[0115] Let be the average annual lighting duration (h / a) of the i-th type of room;

[0116] The simultaneous use factor for the lighting fixtures is set to 0.5.

[0117] P represents a specific energy consumption (mW·h / kg·m).

[0118] The average annual operating time of the elevator (h);

[0119] The elevator's operating speed (m / s);

[0120] The elevator's rated load capacity (kg);

[0121] Elevator standby energy consumption (W);

[0122] The average annual standby time of the elevator (h);

[0123] D represents the central heating period (days);

[0124] Heat consumption during building heating (W / m2);

[0125] The total area of ​​the heating area (m2);

[0126] The carbon footprint factor of coal (kgCO2 / kg);

[0127] The calorific value of standard coal is taken as 8.14 × 10³ Wh / kg;

[0128] For boiler operating efficiency;

[0129] For the transmission efficiency of heating pipelines;

[0130] The consumption of the i-th type of building material required for maintenance and updates;

[0131] The carbon emission factor (kgCO2 / unit building material consumption) of the i-th building material required for maintenance and renewal.

[0132] Let be the number of times the i-th type of building material needs maintenance and replacement. In this embodiment, Energy consumption of the air conditioning system. Energy consumption of the lighting system Energy consumption of the elevator system. Energy consumption of the heating system. To address the building maintenance workload required for building damage, aging, and repair, the carbon emissions during the operation and maintenance phase are broken down into energy consumption of air conditioning systems, lighting systems, elevator systems, heating systems, and building maintenance workload. This further refines the consumption during the operation and maintenance phase and improves the accuracy of the carbon emission calculation method for building hybrid structures.

[0133] like Figure 1 As shown, in step four, the carbon emissions during the decommissioning and dismantling phase... According to formula 6:

[0134] (Formula 6);

[0135] in, Let be the unit consumption (units) of the i-th type of demolition machinery.

[0136] The carbon emission factor per unit shift of the i-th type of demolition machinery (kgCO2 / shift);

[0137] Let be the weight (t) of the i-th type of construction waste;

[0138] Let be the transportation distance (km) for the i-th type of construction waste;

[0139] Let [kgCO2 / (t·km)] be the carbon emission factor per unit weight transport distance under the i-th mode of transportation;

[0140] For the no-load return coefficient, take... =1.67. In this embodiment, To reduce emissions from the operation of construction machinery on site, To reduce emissions from transportation vehicles used for transporting construction waste, the carbon emissions during the demolition phase are broken down into emissions from the operation of construction machinery at the demolition site and emissions from transportation vehicles, thereby further improving the overall carbon emissions during the demolition phase. The accuracy of the calculation.

[0141] The specific embodiments described herein are merely illustrative examples illustrating the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the scope defined by the spirit of the invention.

Claims

1. A method for accurately calculating carbon emissions from the construction of hybrid building structures, characterized in that: Includes the following steps: Step 1: Based on the building type, obtain the material list, construction process parameters, operation and maintenance, and demolition and recycling data for the mixed-structure building. Step 2: Construct a full life cycle carbon emission model, covering five stages: building material production, transportation, construction, operation and maintenance, and demolition. Step 3: Construct a carbon emission factor library model; The carbon emission factor library includes carbon emission factors for non-metallic building materials, carbon emission factors for metallic building materials, carbon emission factors for prefabricated components, carbon emission factors for energy, carbon emission factors for transportation, carbon emission factors for construction machinery, and carbon emission factors for human activities. Step 4: Calculate carbon emissions during the building materials production stage. Carbon emissions during the transportation phase Carbon emissions during the construction phase Carbon emissions during operation and maintenance phase Carbon emissions during the demolition and abandonment phase ; Step 5: Calculate the total carbon emissions over the entire life cycle; Calculate the total life-cycle carbon emissions based on the results of step four and formula 1. : (Official 1).

2. The method for accurately calculating carbon emissions from the construction of hybrid building structures according to claim 1, characterized in that, In step four, carbon emissions during the building materials production stage According to formula 2: (Official 2); in, This represents the energy consumption of mechanical equipment required in the production process of the i-th type of building material, in units of fossil energy kg or electricity kW·h; This represents the carbon emission factor of fossil energy or electricity consumed by the mechanical equipment required in the production process of the i-th type of building material, in units of kg·kg⁻¹ or kg·kW⁻¹·h⁻¹. The quantity of building materials required for the i-th type of building (unit: t or m3). The carbon emission factor of the i-th material (unit: kg·t-1 or kg·m-3). The consumption of prefabricated steel structure components of type i (unit: t); Let be the carbon emission factor of the i-th type of prefabricated component (unit: kg·t⁻¹).

3. The method for accurately calculating carbon emissions from the construction of hybrid building structures according to claim 1, characterized in that, In step four, carbon emissions during the transportation phase According to formula 3: (Official 3); in, The material consumption for the eth type, calculated by volume (unit: m³). 3 ); W represents the volumetric capacity of a single transport trip by a truck or concrete mixer truck (unit: m³). 3 ); , The transport distances of building materials, calculated by volume and weight respectively (unit: km); Diesel consumption per km for transport trucks or concrete mixer trucks (unit: L / km). Carbon emission factor of diesel fuel in fossil fuels (unit: kgCO2 / L). The weight of building materials of category f (in tons). The carbon emission factor (unit: kgCO2 ( / t·km) represents the transportation method used to transport the j-th type of building material.

4. The method for accurately calculating carbon emissions from the construction of hybrid building structures according to claim 1, characterized in that, In step four, carbon emissions during the construction phase According to formula 4: (Official 4); in, Let be the daily consumption of the i-th type of machine; Let be the carbon emission factor (kgCO2 / shift) of the i-th type of machinery unit shift. This refers to the amount of labor consumed (work / day). The carbon emission factor is artificial (kgCO2 / workday).

5. The method for accurately calculating carbon emissions from the construction of hybrid building structures according to claim 1, characterized in that, In step four, carbon emissions during the operation and maintenance phase According to formula 5: (Official 5); in, The building's total annual cooling load (kWh / a); This refers to the rated energy consumption ratio of the air conditioner. Carbon emission factor for electricity (kgCO2 / kWh); The building's design service life (a); Lighting power density value (W / m2) of the i-th type of room; Let be the lighting area (m2) of the i-th type of room; Let be the average annual lighting duration (h / a) of the i-th type of room; The simultaneous use factor for the lighting fixtures is set to 0.

5. P represents a specific energy consumption (mW·h / kg·m). The average annual operating time of the elevator (h); The elevator's operating speed (m / s); The elevator's rated load capacity (kg); Elevator standby energy consumption (W); The average annual standby time of the elevator (h); D represents the central heating period (days); Heat consumption during building heating (W / m2); The total area of ​​the heating area (m2); The carbon footprint factor of coal (kgCO2 / kg); The calorific value of standard coal is taken as 8.14 × 10³ Wh / kg; For boiler operating efficiency; For the transmission efficiency of heating pipelines; The consumption of the i-th type of building material required for maintenance and updates; The carbon emission factor (kgCO2 / unit building material consumption) of the i-th building material required for maintenance and renewal. Let represent the number of times the i-th type of building material is maintained and updated.

6. The method for accurately calculating carbon emissions from the construction of hybrid building structures according to claim 1, characterized in that, In step four, the carbon emissions during the decommissioning and demolition phase... According to formula 6: (Official 6); in, Let be the unit consumption (units) of the i-th type of demolition machinery. The carbon emission factor per unit shift of the i-th type of demolition machinery (kgCO2 / shift); Let be the weight (t) of the i-th type of construction waste; Let be the transportation distance (km) for the i-th type of construction waste; Let [kgCO2 / (t·km)] be the carbon emission factor per unit weight transport distance under the i-th mode of transportation; For the no-load return coefficient, take... =1.67.

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