Engineering project comprehensive cost dynamic control method considering carbon emission

Abstract

The invention discloses an engineering project comprehensive cost dynamic control method considering carbon emission. The method comprises the following steps: step 1, calculating the total plan cost of a project; step 2, establishing a time-plan cost curve; 3, in the construction process of the engineering project, a time-actual cost relation curve is obtained; the accounting period is set to be one month; 4, drawing a comparison graph of the time-actual cost curve and the time-planned cost curve, and performing cost control according to the current total actual cost trend condition: if the current actual total cost is lower than the planned total cost of the same period, performing the project according to the original plan; if the current actual total cost is higher than the planned total cost in the same period, a deviation correction scheme is adopted; and 5, for the selected deviation rectification scheme, recalculating the total cost according to the method in the step 1, and executing the deviation rectification scheme when the total cost meets the requirement of the total planned cost. According to the invention, the comprehensive cost of the engineering project in the whole construction process can be accurately and dynamically controlled.

Description

Technical Field

[0001] The invention relates to a method for dynamically controlling the comprehensive cost of an engineering project taking carbon emissions into consideration. Background Art

[0002] Carbon costs in engineering projects have gradually become an issue that all industries must face. At present, major first-tier cities across the country have established carbon trading centers and included some industrial and transportation companies in the list of carbon emission quota management units to participate in carbon trading. As a major carbon emitter, it can be foreseen that in the construction of future engineering projects, in addition to considering the costs of manpower, materials, and machinery, carbon costs will also become an important part that cannot be ignored.

[0003] The construction quota method divides and codes the various work contents of the project, and can directly calculate the quantity and cost of each work content according to the quota standard, without the need for a complicated calculation process, thereby improving the efficiency of engineering cost calculation. However, the above method cannot be directly applied to carbon emission control, so how to apply the quota method to carbon emission control has become a technical issue worthy of study.

[0004] The current cost control technology for engineering projects is very mature, but it has not yet taken into account the cost of carbon emissions, and the accounting method for carbon emissions is still immature. How to achieve accurate and dynamic cost control throughout the entire process of construction engineering is a more prominent issue. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a method for dynamic control of the comprehensive cost of engineering projects taking carbon emissions into consideration, which can accurately and dynamically control the comprehensive cost of the engineering project during the entire construction process.

[0006] The object of the present invention is achieved by: a method for dynamic control of comprehensive cost of engineering projects considering carbon emissions, comprising the following steps:

[0007] Step 1: Calculate the total planned cost of the project; C = C1 + C2;

[0008] C is the total planned cost; C1 is the planned material cost, calculated based on the construction budget document; C2 is the planned carbon emission cost = A × B; A is the total carbon emissions; B is the unit carbon emission rights trading price;

[0009] Step 2: According to the project contract duration and project construction plan, establish a time-planned cost curve, including tC curve, t-C1 curve, and t-C2 curve, where t is the project construction time, C is the total planned cost of the project, C1 is the planned material cost, and C2 is the planned carbon emission cost;

[0010] Step 3: During the construction of the project, the construction company shall report the actual construction data on site every day. Based on the actual construction data on site and the unit carbon emission rights trading price B announced by the local carbon trading center every day, the time-actual cost relationship curve is obtained, including tC a Curve, tC 1a Curve, tC 2a Curve, where t is the project construction time, C a is the total actual cost of the project, C 1a is the actual cost of materials, C 2a is the actual cost of carbon emissions; the accounting period is set to one month;

[0011] Step 4: Draw the time-actual cost curve tC a Comparison chart with the time-planned cost curve tC, and cost control based on the current total actual cost trend:

[0012] If the current actual total cost is lower than the planned total cost for the same period, the project will proceed as planned;

[0013] If the current actual total cost is higher than the planned total cost for the same period, a corrective plan will be adopted;

[0014] Step 5: For the correction plan adopted, calculate the carbon emission cost according to the method in step 1, and recalculate the total cost based on the calculation results. When the total cost of the project meets the requirements of the total planned cost of the project, implement the correction plan;

[0015] When there are multiple qualified correction schemes, the calculation results of the total costs of each correction scheme are compared, and the correction scheme with the smallest total cost is selected.

[0016] In the above-mentioned dynamic control method for comprehensive cost of engineering projects considering carbon emissions, when performing step 1, the calculation method of total carbon emissions A is performed in the following order:

[0017] S1. Determine the accounting boundary of carbon emissions during the construction phase of the project. The accounting boundary includes physical boundary and time boundary. The physical boundary is the construction site and living area within the building red line, and the time boundary is from the start of the project to the completion acceptance.

[0018] S2. Determine the carbon emission sources and composition through the construction budget document; carbon emission sources include direct emissions and indirect emissions; direct emissions include the breathing and mechanical energy consumption of construction workers in large temporary engineering sites and construction living sites within the project red line that serve the construction; indirect emissions include indirect carbon emissions from materials or equipment and carbon emissions from the generation process of purchased electricity; among them, indirect carbon emissions from materials or equipment include carbon emissions from the production process of materials or equipment and carbon emissions from the off-site transportation process of materials or equipment;

[0019] S3. Collect activity level data of carbon emission sources;

[0020] The activity level data of mechanical energy consumption and material generation and transportation are obtained through calculation of construction budget documents; the activity level data of electricity and oil consumption are obtained through automatic uploading of smart metering instruments; the activity level data of construction personnel are obtained through calculation of daily reporting of construction site personnel data;

[0021] S4. Calculate carbon emissions using the carbon emission factor method;

[0022] 1. The carbon emissions from construction workers’ living energy consumption are calculated using the following formula (1):

[0023]

[0024] In the above formula (1), Ep is the carbon emission of construction workers' living energy consumption (kgCO2); Ai is the number of the i-th project content; Npi is the quota of the i-th project content (man-day); EFp is the carbon emission factor of construction workers' living energy consumption (kgCO2 / man-day), which is calculated at 1.84kgCO2 / man-day;

[0025] 2. The carbon emissions from energy consumption of construction machinery are calculated according to the following formula (2):

[0026]

[0027] In the above formula (2), Ee is the carbon emission of energy consumption of construction machinery (kgCO2); Ai is the number of the i-th project content; Ne,i,j is the quota of the j-th construction machinery in the i-th project content (shift / project quantity); EFe,j is the carbon emission factor of the j-th construction machinery (kgCO2 / shift); i is the number of the measurement project; j is the number of the construction machinery;

[0028] 3. Carbon emissions from the material production process are calculated using the following formula (3):

[0029]

[0030] In the above formula (3), Em is the carbon emission in the material production process (kgCO2); Ai is the quantity of the i-th project content; Ne,m,j is the quota consumption of the k-th material in the i-th project content (kg / project quantity); EFm,k is the carbon emission factor in the k-th material production process (kgCO2 / kg); i is the number of the measurement project; j is the material number;

[0031] 4. Carbon emissions from off-site material transportation are calculated using the following formula (4):

[0032]

[0033] In the above formula (4), Et is the carbon emission during the off-site transportation of materials (kgCO2); Ai is the number of projects in the i-th project content; Nm,i,k is the quota consumption of the k-th material in the i-th project content (kg / number of projects); Lk is the average off-site transportation distance of the k-th material (km); EFt,p is the carbon emission factor per unit turnover of the p-th type of transportation equipment (kgCO2, / (t·km)); i is the number of the measurement project; k is the number of the material; p is the type of transportation equipment;

[0034] 5. Carbon emissions from the generation of purchased electricity are calculated using the following formula (5):

[0035]

[0036] In the above formula (5), Ed is the carbon emission in the process of purchasing electricity (kgCO2); Ai is the number of projects in the i-th project content; Ne,i,j is the quota consumption of the j-th type of construction machinery in the i-th project content (unit shift / number of projects); Be,j is the power consumption per unit shift of the j-th type of construction machinery (kWh / unit shift); EFd is the carbon dioxide emission factor of the power grid (kgCO2 / kWh), which adopts the emission factor announced by relevant national agencies; i is the number of the measurement project; k is the number of the measurement construction machinery;

[0037] Total carbon emissions A=Ep+Ee+Em+Et+Ed.

[0038] The characteristics of the dynamic control method of comprehensive cost of engineering projects considering carbon emissions of the present invention are: calculating carbon emission cost based on engineering construction quota method, dynamically controlling project construction cost during construction, and realizing dynamic control of comprehensive cost during the entire construction process of the engineering project. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a flow chart of the step 1 of the method for dynamic control of comprehensive cost of engineering projects considering carbon emission of the present invention;

[0040] Figure 2 It is a comparison chart of actual cost and planned cost drawn when performing step 4 of the method for dynamic control of comprehensive cost of engineering projects considering carbon emissions of the present invention. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with the accompanying drawings.

[0042] The method for dynamic control of comprehensive cost of engineering projects considering carbon emissions of the present invention comprises the following steps:

[0043] Step 1: Calculate the total planned cost of the project; C = C1 + C2

[0044] C is the total planned cost; C1 is the planned material cost, calculated based on the construction budget document; C2 is the planned carbon emission cost = A × B; A is the total carbon emission of the project; B is the unit carbon emission rights trading price;

[0045] The calculation method of the project's total carbon emissions A is carried out in the following order:

[0046] S1. Determine the accounting boundary of carbon emissions during the construction phase of the project. The accounting boundary includes physical boundary and time boundary. The physical boundary is the construction site and living area within the building red line, and the time boundary is from the start of the project to the completion acceptance.

[0047] S2. Determine the carbon emission sources and composition through the construction budget document; carbon emission sources include direct emissions and indirect emissions; direct emissions include the breathing and mechanical energy consumption of construction workers in large temporary engineering sites and construction living sites within the project red line that serve the construction; indirect emissions include indirect carbon emissions from materials or equipment and carbon emissions from the generation process of purchased electricity; among them, indirect carbon emissions from materials or equipment include carbon emissions from the production process of materials or equipment and carbon emissions from the off-site transportation process of materials or equipment;

[0048] S3. Collect activity level data of carbon emission sources;

[0049] The activity level data of mechanical energy consumption and material generation and transportation are obtained through calculation of construction budget documents; the activity level data of electricity and oil consumption are obtained through automatic uploading of smart metering instruments; the activity level data of construction personnel are obtained through calculation of daily reporting of construction site personnel data;

[0050] S4. Calculate carbon emissions using the carbon emission factor method;

[0051] 1. The carbon emissions from construction workers’ living energy consumption are calculated using the following formula (1):

[0052]

[0053] In the above formula (1), Ep is the carbon emission of construction workers' living energy consumption (kgCO2); Ai is the number of the i-th project content; Npi is the quota of the i-th project content (man-day); EFp is the carbon emission factor of construction workers' living energy consumption (kgCO2 / man-day), which is calculated at 1.84kgCO2 / man-day;

[0054] 2. The carbon emissions from energy consumption of construction machinery are calculated according to the following formula (2):

[0055]

[0056] In the above formula (2), Ee is the carbon emission of energy consumption of construction machinery (kgCO2); Ai is the number of the i-th project content; Ne,i,j is the quota of the j-th construction machinery in the i-th project content (shift / project quantity); EFe,j is the carbon emission factor of the j-th construction machinery (kgCO2 / shift); i is the number of the measurement project; j is the number of the construction machinery;

[0057] 3. Carbon emissions from the material production process are calculated using the following formula (3):

[0058]

[0059] In the above formula (3), Em is the carbon emission in the material production process (kgCO2); Ai is the quantity of the i-th project content; Ne,m,j is the quota consumption of the k-th material in the i-th project content (kg / project quantity); EFm,k is the carbon emission factor in the k-th material production process (kgCO2 / kg); i is the number of the measurement project; j is the material number;

[0060] 4. Carbon emissions from off-site material transportation are calculated using the following formula (4):

[0061]

[0062] In the above formula (4), Et is the carbon emission during the off-site transportation of materials (kgCO2); Ai is the number of projects in the i-th project content; Nm,i,k is the quota consumption of the k-th material in the i-th project content (kg / number of projects); Lk is the average off-site transportation distance of the k-th material (km); EFt,p is the carbon emission factor per unit turnover of the p-th type of transportation equipment (kgCO2, / (t·km)); i is the number of the measurement project; k is the number of the material; p is the type of transportation equipment;

[0063] 5. Carbon emissions from the generation of purchased electricity are calculated using the following formula (5):

[0064]

[0065] In the above formula (5), Ed is the carbon emission in the process of purchasing electricity (kgCO2); Ai is the number of projects in the i-th project content; Ne,i,j is the quota consumption of the j-th type of construction machinery in the i-th project content (unit shift / number of projects); Be,j is the power consumption per unit shift of the j-th type of construction machinery (kWh / unit shift); EFd is the carbon dioxide emission factor of the power grid (kgCO2 / kWh), which adopts the emission factor announced by relevant national agencies; i is the number of the measurement project; k is the number of the measurement construction machinery;

[0066] The unit project quota consumption adopts the quota data published on the official website of the Housing and Urban-Rural Development Bureau;

[0067] The carbon emission factor of the construction workers' living energy consumption is 1.84kgCO2 / workday. The data comes from the Carbon-Oxygen Average Method for Calculating Urban Greening Area Wang Yongan and Gong Yingbi, Green Economy;

[0068] The carbon emission factors of the material production process and the carbon emission factors of the energy consumption of common construction machinery are calculated according to the "Building Carbon Emission Calculation Standard" GB / T51366-2019;

[0069] The grid carbon dioxide emission factor adopts the 0.58tCO2 / MWh specified in the Ministry of Ecology and Environment's "Corporate Greenhouse Gas Emissions Accounting Methodology and Reporting Guidelines for Power Generation Facilities (2022 Revised Edition)", and is updated in a timely manner according to the latest values ​​released by the Ministry of Ecology and Environment;

[0070] Total carbon emissions A = Ep + Ee + Em + Et + Ed;

[0071] Step 2: According to the project contract duration and project construction plan, establish a time-planned cost curve, including tC curve, t-C1 curve, and t-C2 curve, where t is the project construction time, C is the total planned cost of the project, C1 is the planned material cost, and C2 is the planned carbon emission cost;

[0072] Step 3: During the construction of the project, the construction company shall report the actual construction data on site every day. Based on the actual construction data on site and the unit carbon emission rights trading price B announced by the local carbon trading center every day, the time-actual cost relationship curve is obtained, including tC a Curve, tC 1a Curve, tC 2a Curve, where t is the project construction time, C a is the total actual cost of the project, C 1a is the actual cost of materials, C 2a The actual cost of carbon emissions;

[0073] The accounting cycle is set to one month, which can be adjusted according to the actual needs of the project;

[0074] Step 4: Draw the time-actual cost curve tC a and the time-plan cost curve tC (see Figure 2 , and conduct cost control based on the current total actual cost trend:

[0075] If the current actual total cost is lower than the planned total cost for the same period, the project will proceed as planned;

[0076] If the current actual total cost is higher than the planned total cost for the same period, a correction plan will be adopted; the correction plan is determined based on the problems encountered in the project, and the correction plan includes increasing labor, replacing construction materials and construction machinery, etc.;

[0077] Step 5: For the correction plan adopted, calculate the carbon emission cost according to the method in step 1, and recalculate the total project cost based on the calculation result of the carbon emission cost. When the total project cost meets the total planned cost of the project, implement the correction plan;

[0078] When there are multiple qualified correction schemes, the calculation results of the total costs of each correction scheme are compared, and the correction scheme with the smallest total cost is selected.

[0079] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Those skilled in the relevant technical field may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by the claims.

Claims

1. A dynamic control method for comprehensive cost of engineering projects considering carbon emissions, characterized in that: The dynamic control method comprises the following steps: Step 1: Calculate the total planned cost of the project; C = C1 + C2; C is the total planned cost; C1 is the planned material cost, calculated based on the construction budget document; C2 is the planned carbon emission cost = A × B; A is the total carbon emissions; B is the unit carbon emission rights trading price; Step 2: According to the project contract duration and project construction plan, establish a time-planned cost curve, including tC curve, t-C1 curve, and t-C2 curve, where t is the project construction time, C is the total planned cost of the project, C1 is the planned material cost, and C2 is the planned carbon emission cost; Step 3: During the construction of the project, the construction company shall report the actual construction data on site every day. Based on the actual construction data on site and the unit carbon emission rights trading price B announced by the local carbon trading center every day, the time-actual cost relationship curve is obtained, including tC a Curve, tC 1a Curve, tC 2a Curve, where t is the project construction time, C a is the total actual cost of the project, C 1a is the actual cost of materials, C 2a is the actual cost of carbon emissions; the accounting period is set to one month; Step 4: Draw the time-actual cost curve tC a Comparison chart with the time-planned cost curve tC, and cost control based on the current total actual cost trend: If the current actual total cost is lower than the planned total cost for the same period, the project will proceed as planned; If the current actual total cost is higher than the planned total cost for the same period, a corrective plan will be adopted; Step 5: For the correction plan adopted, calculate the carbon emission cost according to the method in step 1, and recalculate the total cost based on the calculation results. When the total cost of the project meets the requirements of the total planned cost of the project, implement the correction plan; When there are multiple qualified correction schemes, the calculation results of the total costs of each correction scheme are compared, and the correction scheme with the smallest total cost is selected.

2. The method for dynamic control of comprehensive cost of engineering projects considering carbon emissions according to claim 1 is characterized in that: When performing step 1, the calculation method of total carbon emissions A is carried out in the following order: S1. Determine the accounting boundary of carbon emissions during the construction phase of the project. The accounting boundary includes physical boundary and time boundary. The physical boundary is the construction site and living area within the building red line, and the time boundary is from the start of the project to the completion acceptance. S2. Determine the carbon emission sources and composition through the construction budget document; carbon emission sources include direct emissions and indirect emissions; direct emissions include the breathing and mechanical energy consumption of construction workers in large temporary engineering sites and construction living sites within the project red line that serve the construction; indirect emissions include indirect carbon emissions from materials or equipment and carbon emissions from the generation process of purchased electricity; among them, indirect carbon emissions from materials or equipment include carbon emissions from the production process of materials or equipment and carbon emissions from the off-site transportation process of materials or equipment; S3. Collect activity level data of carbon emission sources; The activity level data of mechanical energy consumption and material generation and transportation are obtained through calculation of construction budget documents; the activity level data of electricity and oil consumption are obtained through automatic uploading of smart metering instruments; the activity level data of construction personnel are obtained through calculation of daily reporting of construction site personnel data; S4. Calculate carbon emissions using the carbon emission factor method; 1. The carbon emissions from construction workers’ living energy consumption are calculated using the following formula (1): In the above formula (1), Ep is the carbon emission of construction workers' living energy consumption (kgCO2); Ai is the number of the i-th project content; Npi is the quota of the i-th project content (man-day); EFp is the carbon emission factor of construction workers' living energy consumption (kgCO2 / man-day), which is calculated at 1.84kgCO2 / man-day; 2. The carbon emissions from energy consumption of construction machinery are calculated according to the following formula (2): In the above formula (2), Ee is the carbon emission of energy consumption of construction machinery (kgCO2); Ai is the number of the i-th project content; Ne,i,j is the quota of the j-th construction machinery in the i-th project content (shift / project quantity); EFe,j is the carbon emission factor of the j-th construction machinery (kgCO2 / shift); i is the number of the measurement project; j is the number of the construction machinery; 3. Carbon emissions from the material production process are calculated using the following formula (3): In the above formula (3), Em is the carbon emission in the material production process (kgCO2); Ai is the quantity of the i-th project content; Ne,m,j is the quota consumption of the k-th material in the i-th project content (kg / project quantity); EFm,k is the carbon emission factor in the k-th material production process (kgCO2 / kg); i is the number of the measurement project; j is the material number; 4. Carbon emissions from off-site material transportation are calculated using the following formula (4): In the above formula (4), Et is the carbon emission during the off-site transportation of materials (kgCO2); Ai is the number of projects in the i-th project content; Nm,i,k is the quota consumption of the k-th material in the i-th project content (kg / number of projects); Lk is the average off-site transportation distance of the k-th material (km); EFt,p is the carbon emission factor per unit turnover of the p-th type of transportation equipment (kgCO2, / (t·km)); i is the number of the measurement project; k is the number of the material; p is the type of transportation equipment; 5. Carbon emissions from the generation of purchased electricity are calculated using the following formula (5): In the above formula (5), Ed is the carbon emission in the process of purchasing electricity (kgCO2); Ai is the number of projects in the i-th project content; Ne,i,j is the quota consumption of the j-th type of construction machinery in the i-th project content (unit shift / number of projects); Be,j is the power consumption per unit shift of the j-th type of construction machinery (kWh / unit shift); EFd is the carbon dioxide emission factor of the power grid (kgCO2 / kWh), which adopts the emission factor announced by relevant national agencies; i is the number of the measurement project; k is the number of the measurement construction machinery; Total carbon emissions A=Ep+Ee+Em+Et+Ed.

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