Building steel environment performance evaluation method and building environment evaluation management system

Abstract

According to the building steel environment performance evaluation method and the building environment evaluation management system provided by the invention, through online life cycle data acquisition, data and carbon distribution and product environment performance evaluation, an environment performance evaluation function of building steel is realized, and evaluation requirements of building users on product environment performance can be timely and effectively met. By developing the building steel environmental performance evaluation system and method, quantitative evaluation and authentication of life cycle environmental performance indexes of building steel products are realized, personalized requirements of markets and industries on the building steel are met, the environmental performance recognition degree of the products in the international market is improved, the international market share of the building steel is maintained and expanded, and the economic benefits of the products are improved. And the market competitiveness is improved.

Description

Technical Field

[0001] This invention belongs to the field of building management technology, specifically relating to a method for evaluating the environmental performance of steel used in buildings and a building environmental assessment management system. Background Technology

[0002] EN 15804, as the core standard for Environmental Product Declarations (EPDs) of building products developed by the European Committee for Standardization (CEN), provides an authoritative technical framework for the environmental impact assessment of building products. The latest revision has significantly strengthened the requirements for data quality assessment and achieved full alignment with the International Reference Life Cycle Data System (ILCD) format, effectively promoting the standardization process of carbon footprint accounting for building products. Currently, this standard has become one of the most influential technical specifications in the global building and sustainable development field, and its influence has expanded from Europe to major global markets.

[0003] Driven by the global green building trend, the international market demand for EN 15804 certification for construction steel is growing. Leading domestic steel companies have received EPD certification requests from construction users in Europe and North America, and this certification has been listed as a mandatory procurement indicator. It is worth noting that mainstream international EPD certification platforms (such as The International EPD System in Sweden, IBU in Germany, and the European ECO Platform) strictly adhere to the EN 15804 standard system. This means that for domestic construction steel products to gain recognition in the international market, they must establish a technical system that complies with this standard.

[0004] However, EN 15804, as a specific environmental assessment standard for building products, differs significantly from the evaluation system for ordinary steel products in areas such as life cycle stage division, accounting boundary definition, allocation method selection, LCIA indicator selection, and evaluation model construction. Existing evaluation methods and systems are insufficient to meet the specific requirements of building steel, necessitating the development of a professional life cycle assessment model and supporting software system conforming to the EN 15804 standard.

[0005] The main problems with existing related technologies are: 1) The existing evaluation system is mainly geared towards general steel products and is consistent with the World Steel Association standards. However, it still has significant shortcomings in the evaluation of steel for construction, especially in terms of the compatibility with the EN 15804 standard, where there is a lack of systematic theoretical research and model support.

[0006] 2) EN 15804, as a specific environmental assessment standard for building products, differs significantly from the evaluation system for ordinary steel products in terms of life cycle stage division, accounting boundary definition, allocation method selection, LCIA indicator selection, and evaluation model construction. Existing evaluation methods and systems are insufficient to meet the specific requirements of building steel, necessitating the development of a professional life cycle assessment model and supporting software system that conforms to the EN 15804 standard.

[0007] 3) The production process of steel products is long, the logistics process is intricate and overlapping, and the product structure is complex and diverse. The carbon footprint assessment process of a single product involves thousands of raw data. If the calculation process is to cover all processes and all products, the amount of data and workload is enormous, and it is difficult to guarantee work efficiency and calculation accuracy by doing it manually. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a method for environmental performance evaluation of building steel and a building environmental assessment management system for conducting environmental performance evaluation of building steel and building environmental assessment management.

[0009] The technical solution adopted by this invention to solve the above-mentioned technical problems is: a method for environmental performance evaluation of steel used in construction, comprising the following steps: S1: Collect data according to different stages of the life cycle of building steel and verify data quality; S2: Select the allocation method according to actual needs, determine the environmental performance allocation coefficient of the symbiotic products of building steel in the process involving allocation, and clarify the allocation ratio of environmental load among symbiotic products; S3: Calculate the environmental performance data of steel used in construction according to the category of environmental impact; S4: Perform visual analysis of environmental performance data and generate reports.

[0010] According to the above scheme, the specific steps in step S1 are as follows: S11: Collect full life-cycle data of steel used in construction from upstream to downstream; S12: Verify data quality through metal balance and carbon balance tests of each process unit.

[0011] Furthermore, in step S11, the life cycle of building steel includes the product stage, the end-of-life stage, and the off-system benefit stage. During the product stage, data are collected including the energy consumption and transportation costs of raw and auxiliary materials mining, as well as the recycling rate of by-products, wastewater and waste gas treatment, and material properties. During the end-of-life phase, data will be collected including the equipment, consumables and quantities used in the dismantling process, total energy consumption, transportation methods and distances for waste generated, and energy consumption for waste treatment and disposal. Data including scrap steel recycling rate and scrap steel utilization rate are collected during the revenue phase outside the system boundary.

[0012] Furthermore, in step S12, Metal balance testing is expressed as the metal balance rate, which is used to verify whether the input iron content and the output iron content are balanced. The metal balance rate is calculated as follows: the sum of the product of the consumption of each raw material or auxiliary material and the iron content is taken as the input iron content; the sum of the product of the consumption of each product or symbiotic product and the iron content is taken as the output iron content; the difference between the input iron content and the output iron content is calculated, and the ratio of the difference to the input iron content is obtained to obtain the metal balance rate. Carbon balance verification is expressed as the carbon balance rate, which is used to verify whether the total input carbon content is balanced with the total output carbon content. The carbon balance rate is calculated as follows: the total input carbon content is obtained by summing the product of the consumption of each raw material, auxiliary material or energy and its carbon content; the total output carbon content is obtained by summing the product of the consumption of each product or symbiotic product and its carbon content; the carbon balance rate is obtained by subtracting the total input carbon content from the total output carbon content and calculating the ratio of the difference to the total input carbon content.

[0013] According to the above scheme, the specific steps in step S2 are as follows: The processes involved in allocation include coking, blast furnace, converter, and electric furnace processes; Coking process co-products include coke, coke oven gas, crude benzene, tar, and CDQ electricity; The co-products of the blast furnace process include molten iron, blast furnace slag, blast furnace gas, and TRT electricity; The co-products of the converter process include converter steel, converter slag, converter gas, and low-pressure steam. The co-products of the electric arc furnace process include molten steel, slag, and waste heat steam.

[0014] According to the above scheme, in step S2, the allocation methods include cut-off, economic allocation, and physical allocation; Cut-off means that all carbon emissions in a process unit are attributed to the main product, i.e., the allocation coefficient of the main product is 1, and all co-existing products do not bear environmental load, i.e., the allocation coefficient is 0. In the subsequent use stage, co-existing products are considered to be zero-load products. Economic distribution is the calculation of the distribution coefficient of a certain symbiotic product based on the proportion of its economic value in the total economic value of all symbiotic products in a process unit. Physical allocation is calculated by taking into account the proportion of the energy of a certain symbiotic product in the total energy of all symbiotic products in the process unit. At the same time, the principle of reaction process is taken into account, and raw and auxiliary materials that make special contributions to the reaction process are allocated separately based on the reaction principle.

[0015] According to the above scheme, in step S3, the environmental performance indicators for building steel include: The Global Warming Potential Index (GWP) is an indicator representing the total amount of climate change, expressed in kgCO2-eq. The Global Warming Potential Index (GWP-Fossil), an indicator of climate change-fossils, is measured in kgCO2-eq. The Global Warming Potential Index (GWP-Bio) is an indicator of climate change in biological terms, measured in kgCO2-eq. The Global Warming Potential Index (GWP-Land Use) is an indicator of climate change-land and land use change, measured in kgCO2-eq. The ozone depletion potential (ODP) of the stratospheric ozone layer is an indicator of ozone depletion, measured in kg CFC 11-eq. The acidification value is an indicator of acidification, expressed in mol H+ eq. The eutrophication value, an indicator of freshwater eutrophication, is expressed in kgPO4eq. The eutrophication value, an indicator of seawater eutrophication, is expressed in kgN-eq. The eutrophication value is an indicator of terrestrial eutrophication, expressed in mol N eq.; The tropospheric ozone formation potential, an indicator of photochemical ozone generation, is expressed in kg NMVOC-eq. The abiotic depletion potential of non-fossil resources, an indicator of the consumption of abiotic resources—minerals and metals, is expressed in kg Sb eq.; The abiotic consumption potential of fossil fuels is an indicator of the consumption of non-biological resources, expressed in MJ (net calorific value). The indicator for water consumption is the amount of water used, expressed in cubic meters.

[0016] According to the above scheme, the specific steps in step S4 are as follows: S41: Visual analysis includes dynamic dashboard analysis, interactive comparative analysis, and anomaly data tracing; Dynamic dashboard analysis is based on the environmental performance indicators of steel in construction throughout its entire life cycle, and displays data in a multi-dimensional, layered, and phased manner according to categories such as climate change, resource consumption, and pollution emissions. Interactive comparative analysis includes horizontal comparison, vertical trend analysis, and scenario simulation. Horizontal comparison compares the environmental performance of similar steel products under different units. Vertical trend analysis generates environmental load change curves based on historical data to predict future emission reduction potential. Scenario simulation allows users to define parameters and calculate index changes in real time under different scenarios. Abnormal data tracing includes data association tracing and balance verification visualization; data association tracing traces back to the original data node through any indicator; balance verification visualization uses red, yellow and green to mark key imbalance links based on the deviation between metal balance and carbon balance. S42: The generated reports include EN15804 compliance reports, internal analysis reports, and supply chain compliance reports; The EN15804 compliance report is an EPD report for construction steel that meets the requirements of the EN15804 standard. Internal corporate analysis reports are used to summarize environmental performance on a quarterly or annual basis and highlight key areas for improvement. Supply chain compliance reports are used to extract environmental data for specific steel grades to meet the needs of downstream customers.

[0017] A building environmental assessment and management system is provided, which uses a method for evaluating the environmental performance of steel used in buildings to conduct environmental assessment and management of buildings.

[0018] A computer memory storing a computer program executable by a computer processor, the computer program executing a method for evaluating the environmental performance of steel used in construction.

[0019] The beneficial effects of this invention are as follows: 1. The present invention provides a method for environmental performance evaluation of building steel and a building environmental assessment management system. Through online life cycle data collection, data and carbon allocation, and product environmental performance evaluation, it realizes the functions of environmental performance evaluation and building environmental assessment management for building steel, and can timely and effectively meet the evaluation requirements of building users for product environmental performance.

[0020] 2. This invention develops an environmental performance evaluation system and method for building steel, enabling quantitative assessment and certification of environmental performance indicators throughout the product lifecycle of building steel. This meets the market and industry's personalized needs for building steel, enhances the environmental performance recognition of products in the international market, maintains and expands the international market share of building steel, and improves market competitiveness.

[0021] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a flowchart of an embodiment of the present invention.

[0024] Figure 2 This is a flowchart of an embodiment of the present invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0026] Example 1 See Figure 1 The specific steps of an environmental performance evaluation method for building steel are as follows: S1: Collect data according to different stages of the life cycle of building steel and verify data quality; S11: Establish a data collection network for the entire lifecycle of construction steel, from upstream supply chain (iron ore, coke, etc.) to downstream (including recycling stage), to collect data. The life cycle of steel used in construction includes the product phase, the end-of-life phase, and the out-of-systems-boundary benefit phase. During the product stage, data are collected on the energy consumption and transportation costs of raw and auxiliary materials mining, as well as the recycling rate of by-products, wastewater and waste gas treatment, and relevant parameters of material properties; raw and auxiliary materials include iron ore, steel products, and auxiliary materials for each process unit; Data collected during the end-of-life phase includes the equipment, consumables and quantities used in the dismantling process, total energy consumption (such as electricity and fuel), transportation methods and distances for waste generated, energy consumption for waste treatment, and energy consumption for waste disposal.

[0027] Data including scrap steel recycling rate and scrap steel utilization rate are collected during the revenue phase outside the system boundary; The product stages of steel used in construction are collected online through the internal measurement and testing system of construction companies. Offline periodic statistical data is periodically entered and allocated to specific steel coils according to certain physical relationships. If data for the end-of-life stage and the off-system boundary benefit stage cannot be obtained, default values ​​are used. S12: Verify data quality, including metal balance and carbon balance tests for each process unit, to ensure that the quality of the raw data collected meets the evaluation requirements; Metal balance testing is expressed as the metal balance rate, which is used to verify whether the input iron content and the output iron content are balanced. The metal balance rate is calculated as follows: the sum of the product of the consumption of each raw material or auxiliary material and the iron content is taken as the input iron content; the sum of the product of the consumption of each product or symbiotic product and the iron content is taken as the output iron content; the difference between the input iron content and the output iron content is calculated, and the ratio of the difference to the input iron content is obtained to obtain the metal balance rate. Carbon balance verification is expressed as the carbon balance rate, which is used to verify whether the total input carbon content is balanced with the total output carbon content. The carbon balance rate is calculated as follows: the total input carbon content is obtained by summing the product of the consumption of each raw material, auxiliary material or energy and its carbon content; the total output carbon content is obtained by summing the product of the consumption of each product or symbiotic product and its carbon content; the carbon balance rate is obtained by subtracting the total input carbon content from the total output carbon content and calculating the ratio of the difference to the total input carbon content. S2: Select the allocation method based on actual needs, determine the environmental performance allocation coefficient of symbiotic products, and clarify the allocation ratio of environmental load among symbiotic products; The processes involved in allocation include coking, blast furnace, converter, and electric furnace processes; Coking process co-products include coke, coke oven gas, crude benzene, tar, and CDQ electricity (steam). The co-products of the blast furnace process include molten iron, blast furnace slag, blast furnace gas, and TRT electricity; The co-products of the converter process include converter steel, converter slag, converter gas, and low-pressure steam. The co-products of the electric arc furnace process include molten steel, slag, and waste heat steam. Allocation methods include cut-off, economic allocation, and physical allocation; Cut-off means that all carbon emissions in a process unit are attributed to the main product, i.e., the allocation coefficient of the main product is 1, and all co-existing products do not bear environmental load, i.e., the allocation coefficient is 0. In the subsequent use stage, co-existing products are considered to be zero-load products. Economic distribution is the calculation of the distribution coefficient of a certain symbiotic product based on the proportion of its economic value in the total economic value of all symbiotic products in a process unit. Physical allocation is calculated based on the proportion of the energy of a certain symbiotic product in the total energy of all symbiotic products in a process unit. At the same time, the reaction process principle is considered, and raw and auxiliary materials that make special contributions to the reaction process are allocated separately based on the reaction principle. S3: Calculate the environmental performance indicators for construction steel according to the category of environmental impact; including: The Global Warming Potential Index (GWP) is an indicator representing the total amount of climate change, expressed in kgCO2-eq. The Global Warming Potential Index (GWP-Fossil), an indicator of climate change-fossils, is measured in kgCO2-eq. The Global Warming Potential Index (GWP-Bio) is an indicator of climate change in biological terms, measured in kgCO2-eq. The Global Warming Potential Index (GWP-Land Use) is an indicator of climate change-land and land use change, measured in kgCO2-eq. The ozone depletion potential (ODP) of the stratospheric ozone layer is an indicator of ozone depletion, measured in kg CFC 11-eq. The acidification value (AP) is an indicator of acidification, and its unit is mol H+ eq; The eutrophication value, an indicator of freshwater eutrophication, is expressed in kgPO4eq. The eutrophication value, an indicator of seawater eutrophication, is expressed in kgN-eq. The eutrophication value is an indicator of terrestrial eutrophication, expressed in mol N eq.; Tropospheric ozone formation potential (POCP), an indicator of photochemical ozone generation, is expressed in kg NMVOC-eq. The abiotic depletion potential (ADP) of non-fossil resources—minerals and metals—is an indicator of the consumption of these resources, expressed in kg Sb eq. The Abiotic Consumption Potential (ADP) of fossil resources is an indicator of the consumption of abiotic resources—fossil fuels. It is expressed in MJ, or net calorific value. Water consumption (WDP) is an indicator of water usage, expressed in cubic meters. S4: Conduct visualization analysis to transform complex environmental performance data into intuitive, interactive graphical interfaces and generate reports that meet international standards, supporting corporate decision-making and external compliance disclosure; the specific steps are as follows: S41: Visual analysis includes dynamic dashboard analysis, interactive comparative analysis, and anomaly data tracing; The dynamic dashboard analysis is based on the environmental performance indicators of the entire life cycle of building steel (A1-A3, C1-C4, D stage), and displays data in a multi-dimensional, layered, and phased manner according to categories such as climate change, resource consumption, and pollution emissions. Interactive comparative analysis includes horizontal comparison, vertical trend analysis, and scenario simulation. Horizontal comparison compares the environmental performance of similar steel products under different power units. Vertical trend analysis generates environmental load change curves based on historical data to predict future emission reduction potential. Scenario simulation allows users to define parameters (such as transportation distance and energy structure) and calculate the changes in indicators under different scenarios in real time. Abnormal data tracing includes data association tracing and balance verification visualization; data association tracing traces back to the original data node (such as the carbon content of coke and transportation energy consumption in the coking process) through any indicator (such as the GWP value of a batch of steel coils); balance verification visualization marks key imbalance links with red, yellow and green warnings based on the deviation between metal balance and carbon balance. S42: The generated reports include EN15804 compliance reports, internal analysis reports, and supply chain compliance reports; The EN15804 compliance report is an EPD (Environmental Product Declaration) report for construction steel that meets the requirements of the EN15804 standard. Internal corporate analysis reports are used to summarize environmental performance on a quarterly or annual basis and highlight key areas for improvement. Supply chain compliance reports are used to extract environmental data (such as the GWP-Fossil Value) for specific steel grades to meet the needs of downstream customers.

[0028] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0029] This embodiment realizes the function of environmental performance evaluation for building steel through online life cycle data collection, data and carbon allocation, and product environmental performance assessment, which can meet the evaluation requirements of building users for product environmental performance in a timely and effective manner.

[0030] Example 2 This embodiment is used to implement the principles of the above method embodiments to construct an environmental performance evaluation system for building steel, including a data acquisition and verification module, a data allocation module, a building steel environmental performance index calculation module, and a visualization analysis and reporting module.

[0031] The data acquisition and verification module establishes a data acquisition network from the upstream supply chain (iron ore, coke, etc.) to the downstream (including the recycling stage) to collect and verify data.

[0032] According to the EN15804 standard, the minimum declaration stages for steel used in construction should include the product stage (A1-A3), the end-of-life stage (C1-C4), and additional benefits outside the system boundary (D), as described in Table 1: Table 1. Description of the life cycle stages of steel used in construction

[0033] Therefore, the workflow of the data acquisition module includes the following three stages: Data collected during the product phase includes the mining and transportation of raw materials and energy, such as iron ore grade, mining energy consumption, transportation distance and method; raw materials, energy consumption, by-product recycling rate, wastewater and waste gas treatment, material properties and other relevant parameters for each process unit of steel products.

[0034] Data to be collected during the end-of-life phase includes: equipment, consumables and their quantities used in the dismantling process, total energy consumption (such as electricity and fuel), transportation methods and distances for waste generated, energy consumption for waste treatment, and energy consumption for waste disposal.

[0035] For additional revenue phases beyond the system boundaries, data such as scrap steel recovery rate and scrap steel utilization rate should be collected.

[0036] The product stage data acquisition module can achieve online acquisition with the help of the enterprise's internal metrology and testing system. For offline periodic statistical data, it can be periodically entered and allocated to specific steel coils according to certain physical relationships. If the data of dismantling and scrapping stage C and stage D cannot be obtained, the default value can be used.

[0037] Data quality verification includes metal and carbon balance tests for each process unit to ensure that the quality of the collected raw data meets the evaluation requirements.

[0038] Metal balance is a measure of whether the iron content of the input metal material is balanced with the iron content of the output metal material. It is expressed as a metal balance rate and is calculated using the following formula.

[0039] In the formula: R i η Ri Let A be the consumption amount and iron content of the i-th raw material, in tons (t) and percentages, respectively. j η Aj The consumption and iron content of the j-th auxiliary material are respectively, in t, %; P k η Pk The yield and iron content of product k are given in tons (t) and percentages (%), respectively. h η Ch Let be the yield and iron content of the h-th symbiotic product, respectively, in tons.

[0040] Carbon balance is a measure of whether the total input carbon content is balanced with the total output carbon content. It can be measured by calculating the carbon balance rate, as follows:

[0041] In the formula: θ Ri Let be the carbon content of the i-th raw material, %; θ Aj The carbon content of the j-th auxiliary material is %; E k θ Ek Let be the production and carbon content of the k-th energy source, in t and % respectively. θ Ph The carbon content of product h is %; θ Cl The carbon content of the first symbiotic product is %, P h C l For the first h The first product and the l Production of symbiotic products, in tons.

[0042] The data allocation module includes four allocation scenarios: cut-off, economic allocation, and physical allocation. The appropriate allocation module is selected according to actual needs to determine the allocation coefficient of the environmental performance of symbiotic products.

[0043] The main processes involved in the allocation coefficient module include coking, blast furnace, converter and electric furnace processes, but are not limited to the above processes. The main production processes involved in each process are shown in Table 2.

[0044] Table 2 Main symbiotic products

[0045] The cut-off module is used to attribute all carbon emissions from a process unit to the main product, with an allocation coefficient of 1 for the main product. All co-existing products do not bear environmental load and have an allocation coefficient of 0. Co-existing products are also considered to be zero-load products in subsequent use stages.

[0046] The economic allocation module is used to calculate the allocation coefficient based on the proportion of the economic value of symbiotic products in each process unit. The specific calculation formula is as follows:

[0047] In the formula: R i —The economic distribution coefficient of the i-th symbiotic product; p i —Price of the i-th symbiotic product, in yuan / t, yuan / (m3), yuan / kWh; m i — Output of the i-th symbiotic product, t, m3, kWh; The physical allocation module is used to calculate the energy allocation coefficient based on the energy proportion of co-produced products in each process unit. It also considers the reaction process principle; raw materials and auxiliary materials that make a special contribution to the reaction process need to be allocated separately based on the reaction principle. The energy allocation coefficient is determined by the following formula:

[0048] In the formula: η i —Energy allocation coefficient for the i-th symbiotic product; q i —The heat capacity of the i-th symbiotic product, in MJ; Based on specific needs, select an allocation method to clarify the allocation ratio of environmental load among symbiotic products.

[0049] Module for calculating environmental performance indicators for building steel: The environmental performance indicators for building steel differ from those for ordinary steel products, as detailed in Table 3.

[0050] Table 3 Environmental Performance Indicators for Construction Steel

[0051] The visualization analysis and reporting module transforms complex environmental performance data into an intuitive, interactive graphical interface and generates reports that meet international standards, supporting corporate decision-making and external compliance disclosure. The specific design is as follows: Visualization and analysis features: (1) Dynamic Instrument Panel Design Multi-dimensional data display: Based on the environmental performance indicators of the entire life cycle of building steel (A1-A3, C1-C4, D stage), the data is displayed in layers and stages according to categories such as climate change, resource consumption, and pollution emissions.

[0052] (2) Interactive comparative analysis Horizontal comparison: Supports comparison of the environmental performance differences of similar steel products under different units.

[0053] Longitudinal trend: Based on historical data, an environmental load change curve is generated to predict future emission reduction potential.

[0054] Scenario simulation: Allows users to customize parameters (such as transportation distance and energy structure) and calculate the changes in indicators under different scenarios in real time.

[0055] (3) Tracing the source of abnormal data Data linking and tracing: Click on any indicator (such as the GWP value of a batch of steel coils) to trace back to the original data node (such as the carbon content of coke and transportation energy consumption in the coking process).

[0056] Balance verification visualization: Deviations between metal balance and carbon balance are alerted with red, yellow and green colors, and key imbalance points are marked.

[0057] Report generation function: EN15804 Compliance Report: Automatically generates EPD (Environmental Product Declaration) reports for building steel that meet the requirements of EN15804 standards.

[0058] Internal corporate analysis report: Summarizes environmental performance by quarter / year and highlights key areas for improvement.

[0059] Supply chain compliance report: Extract environmental data for specific steel grades (such as GWP-Fossil value for low-carbon rebar) based on the needs of downstream customers.

[0060] This embodiment develops an environmental performance evaluation system and method for building steel, enabling quantitative assessment and certification of environmental performance indicators throughout the product lifecycle. This meets the market and industry's personalized needs for building steel, enhances the environmental performance recognition of the product in the international market, maintains and expands the international market share of building steel, and improves market competitiveness.

[0061] Example 3 This embodiment constructs a building environment assessment and management system based on the principle of embodiment 1, and realizes the function of building environment assessment and management.

[0062] It should be noted that, depending on the implementation needs, the various steps / components described in this application can be broken down into more steps / components, or two or more steps / components or parts of the operation of steps / components can be combined into new steps / components to achieve the purpose of this invention.

[0063] This embodiment also includes a processor, a communication interface, a memory, and a communication bus; wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; the memory stores a computer program, and when the program is executed by the processor, the processor performs the steps of a method for evaluating the environmental performance of building steel.

[0064] This embodiment also provides a computer-readable storage medium storing executable instructions that, when executed by a processor, enable the processor to implement a method for evaluating the environmental performance of building steel.

[0065] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects.

[0066] Furthermore, this application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0067] This application is described with reference to the flowchart of the method and computer program product according to Embodiment 1 and the block diagram of the device (system) according to Embodiment 2. It should be understood that each step or block in the flowchart or block diagram, as well as combinations of steps or blocks in the flowchart or block diagram, can be implemented by computer program instructions.

[0068] These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to produce a machine, such that the instructions, which are executable by the processor of the computer or other programmable data processing device, produce instructions for implementing the process. Figure 1 One or more processes or boxes Figure 1 An environmental performance evaluation system for building steel, specifying functions within one or more boxes.

[0069] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes or boxes Figure 1 The function specified in one or more boxes.

[0070] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes or boxes Figure 1 The steps of an environmental performance evaluation method for building steel are specified in one or more boxes.

[0071] The above embodiments are only used to illustrate the design concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, all equivalent changes or modifications made based on the principles and design ideas disclosed in the present invention are within the protection scope of the present invention.

Claims

1. A method for evaluating the environmental performance of steel used in construction, characterized in that: Includes the following steps: S1: Collect data according to different stages of the life cycle of building steel and verify data quality; S2: Select the allocation method according to actual needs, determine the environmental performance allocation coefficient of the symbiotic products of building steel in the process involving allocation, and clarify the allocation ratio of environmental load among symbiotic products; S3: Calculate the environmental performance data of steel used in construction according to the category of environmental impact; S4: Perform visual analysis of environmental performance data and generate reports.

2. The environmental performance evaluation method for building steel according to claim 1, characterized in that: The specific steps in step S1 are as follows: S11: Collect full life-cycle data of steel used in construction from upstream to downstream; S12: Verify data quality through metal balance and carbon balance tests of each process unit.

3. The method for environmental performance evaluation of steel used in construction according to claim 2, characterized in that: In step S11, the life cycle of steel for construction includes the product stage, the end-of-life stage, and the out-of-systems-boundary benefit stage. During the product stage, data are collected including the energy consumption and transportation costs of raw and auxiliary materials mining, as well as the recycling rate of by-products, wastewater and waste gas treatment, and material properties. During the end-of-life phase, data will be collected including the equipment, consumables and quantities used in the dismantling process, total energy consumption, transportation methods and distances for waste generated, and energy consumption for waste treatment and disposal. Data including scrap steel recycling rate and scrap steel utilization rate are collected during the revenue phase outside the system boundary.

4. The environmental performance evaluation method for building steel according to claim 2, characterized in that: In step S12, Metal balance testing is expressed as the metal balance rate, which is used to verify whether the input iron content and the output iron content are balanced. The metal balance rate is calculated as follows: the sum of the product of the consumption of each raw material or auxiliary material and the iron content is taken as the input iron content; the sum of the product of the consumption of each product or symbiotic product and the iron content is taken as the output iron content; the difference between the input iron content and the output iron content is calculated, and the ratio of the difference to the input iron content is obtained to obtain the metal balance rate. The carbon balance test is expressed as a carbon balance rate and is used to verify whether the total input carbon content is balanced with the total output carbon content. The carbon balance rate is calculated as follows: the product of the consumption of each raw material, auxiliary material or energy and its carbon content is summed to obtain the total input carbon content; the product of the consumption of each product or symbiotic product and its carbon content is summed to obtain the total output carbon content; the difference between the total input carbon content and the total output carbon content is calculated, and the ratio of the difference to the total input carbon content is obtained to obtain the carbon balance rate.

5. The environmental performance evaluation method for building steel according to claim 1, characterized in that: The specific steps in step S2 are as follows: The processes involved in allocation include coking, blast furnace, converter, and electric furnace processes; Coking process co-products include coke, coke oven gas, crude benzene, tar, and CDQ electricity; The co-products of the blast furnace process include molten iron, blast furnace slag, blast furnace gas, and TRT electricity; The co-products of the converter process include converter steel, converter slag, converter gas, and low-pressure steam. The co-products of the electric arc furnace process include molten steel, slag, and waste heat steam.

6. The environmental performance evaluation method for building steel according to claim 1, characterized in that: In step S2, the allocation methods include cut-off, economic allocation, and physical allocation; Cut-off means that all carbon emissions in a process unit are attributed to the main product, i.e., the allocation coefficient of the main product is 1, and all co-existing products do not bear environmental load, i.e., the allocation coefficient is 0. In the subsequent use stage, co-existing products are considered to be zero-load products. Economic distribution is the calculation of the distribution coefficient of a certain symbiotic product based on the proportion of its economic value in the total economic value of all symbiotic products in a process unit. Physical allocation is calculated by taking into account the proportion of the energy of a certain symbiotic product in the total energy of all symbiotic products in the process unit. At the same time, the principle of reaction process is taken into account, and raw and auxiliary materials that make special contributions to the reaction process are allocated separately based on the reaction principle.

7. The environmental performance evaluation method for building steel according to claim 1, characterized in that: In step S3, the environmental performance indicators for building steel include: The Global Warming Potential Index (GWP) is an indicator representing the total amount of climate change, expressed in kgCO2-eq. The Global Warming Potential Index (GWP-Fossil), an indicator of climate change-fossils, is measured in kgCO2-eq. The Global Warming Potential Index (GWP-Bio) is an indicator of climate change in biological terms, measured in kgCO2-eq. The Global Warming Potential Index (GWP-Land Use) is an indicator of climate change-land and land use change, measured in kgCO2-eq. The ozone depletion potential (ODP) of the stratospheric ozone layer is an indicator of ozone depletion, measured in kg CFC 11-eq. The acidification value is an indicator of acidification, expressed in mol H+ eq. The eutrophication value, an indicator of freshwater eutrophication, is expressed in kgPO4eq. The eutrophication value, an indicator of seawater eutrophication, is expressed in kgN-eq. The eutrophication value is an indicator of terrestrial eutrophication, expressed in mol N eq.; The tropospheric ozone formation potential, an indicator of photochemical ozone generation, is expressed in kg NMVOC-eq. The abiotic depletion potential of non-fossil resources, an indicator of the consumption of abiotic resources—minerals and metals, is expressed in kgSb eq.; The abiotic consumption potential of fossil fuels is an indicator of the consumption of non-biological resources, expressed in MJ (net calorific value). The indicator for water consumption is the amount of water used, expressed in cubic meters.

8. The method for environmental performance evaluation of steel used in construction according to claim 1, characterized in that: The specific steps in step S4 are as follows: S41: Visual analysis includes dynamic dashboard analysis, interactive comparative analysis, and anomaly data tracing; Dynamic dashboard analysis is based on the environmental performance indicators of steel in construction throughout its entire life cycle, and displays data in a multi-dimensional, layered, and phased manner according to categories such as climate change, resource consumption, and pollution emissions. Interactive comparative analysis includes horizontal comparison, vertical trend analysis, and scenario simulation; horizontal comparison involves comparing the environmental performance differences of similar steel products under different unit conditions. The longitudinal trend is an environmental load change curve generated based on historical data to predict future emission reduction potential; the scenario simulation uses user-defined parameters to calculate the changes in indicators under different scenarios in real time. Anomaly data tracing includes data correlation tracing and balance verification visualization; data correlation tracing traces back to the original data node through any indicator; The balance verification visualization uses red, yellow, and green colors to mark key imbalance points based on the deviation between the metal balance and the carbon balance. S42: The generated reports include EN15804 compliance reports, internal analysis reports, and supply chain compliance reports; The EN15804 compliance report is an EPD report for construction steel that meets the requirements of the EN15804 standard. Internal corporate analysis reports are used to summarize environmental performance on a quarterly or annual basis and highlight key areas for improvement. Supply chain compliance reports are used to extract environmental data for specific steel grades to meet the needs of downstream customers.

9. A building environment assessment and management system, characterized in that: An environmental performance evaluation method for building steel as described in any one of claims 1 to 8 is used to conduct environmental assessment and management of buildings.

10. A computer memory, characterized in that: It contains a computer program that can be executed by a computer processor, which performs an environmental performance evaluation method for building steel as described in any one of claims 1 to 8.

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