WO2024045094A1

WO2024045094A1 - Life cycle assessment method and device

Info

Publication number: WO2024045094A1
Application number: PCT/CN2022/116364
Authority: WO
Inventors: 斯维纳连科·卡特瑞娜; 吴琪; 亓欣波; 李长鹏
Original assignee: 西门子股份公司; 西门子（中国）有限公司
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2024-03-07

Abstract

A life cycle assessment (LCA) method and device, capable of reducing the modeling difficulty and shortening the modeling time for similar products. The method comprises: acquiring an LCA model of a typical product among the similar products, wherein the similar products are products realizing a same function; determining a parameter set in the LCA model of the typical product and a relationship between the parameter set and an LCA result; and setting parameters, which are obtained from raw data of the typical product, in the parameter set as independent parameters, and setting parameters, which cannot be obtained from the raw data of the typical product, in the parameter set as non-independent parameters, so as to obtain a parametric LCA model of the similar products, wherein the parametric LCA model comprises a formula for calculating the non-independent parameters from the independent parameters and the relationship between the parameter set and the LCA result.

Description

A method and device for life cycle assessment

Technical field

The present application relates to the technical field of life cycle assessment, and more specifically, to a method and device for life cycle assessment.

Background technique

Life cycle assessment (LCA) can be used to evaluate the environmental impact of a product or service throughout its life cycle. When assessing the impact of multiple products on the environment, experts need to spend a lot of time modeling each product one by one, and for similar products, different modeling personnel will make environmental product statements based on the assessment results. (Environment Product Certification, EPD) is not comparable and cannot provide a reference for the government or consumers to evaluate or select products.

Therefore, there is an urgent need for an effective life cycle assessment method that can reduce the difficulty and time of modeling.

Contents of the invention

The embodiments of the present application provide a life cycle assessment LCA method and device, which can provide a universal parameterized LCA model for similar products, reduce the difficulty of modeling similar products, and reduce the modeling time.

In the first aspect, a method of life cycle assessment LCA is provided, including: obtaining an LCA model of a representative product among similar products, which are products that implement the same function; and determining a parameter set in the LCA model of the representative product. and the relationship between the parameter set and the LCA result; setting parameters in the parameter set that cannot be obtained from the original data of the representative product as independent parameters, and setting the parameter set that cannot be obtained from the original data of the representative product. The parameters obtained in are set as non-independent parameters to obtain a parameterized LCA model of the similar products, wherein the parameterized LCA model includes a formula for calculating the non-independent parameters from the independent parameters, and the parameters The relationship between sets and LCA results.

Through this implementation method, experts only need to build an LCA model once for a representative product among similar products, and then parameterize the LCA model to obtain a general LCA model for similar products. In this way, non-professional users can use the general LCA model for Evaluating the environmental impact of any product of the same type can reduce the difficulty and time of modeling similar products.

In a second aspect, a device for life cycle assessment LCA is provided, including: an acquisition unit, used to obtain LCA models of representative products among similar products, which are products that implement the same function; a processing unit, used to determine the Describe the parameter set in the LCA model representing the product and the relationship between the parameter set and the LCA result; set the parameters obtained from the original data of the representative product in the parameter set as independent parameters, and set the parameter set in the Parameters that cannot be obtained from the original data representing the product are set as non-independent parameters to obtain a parameterized LCA model of the similar products, wherein the parameterized LCA model includes calculating the non-independent parameters from the independent parameters. Formulas for the independent parameters, and the relationship between the parameter set and the LCA results.

In a third aspect, a device for life cycle assessment LCA is provided, including a memory for storing a program; a processor for executing the program stored in the memory, and when the program stored in the memory is executed, the processing The method used by the processor to perform the above LCA.

In a fourth aspect, a computer-readable storage medium is provided, the computer-readable medium stores program code for device execution, the program code includes instructions for performing steps in the above-mentioned LCA method.

Description of drawings

Figure 1 is a schematic structural diagram of a life cycle assessment framework according to an embodiment of the present application.

Figure 2 is a schematic flow chart of a life cycle assessment method according to an embodiment of the present application.

Figure 3 is a schematic block diagram of the life cycle stages and system boundaries of a product according to an embodiment of the present application;

Figure 4 is a schematic block diagram of a life cycle assessment device according to an embodiment of the present application.

Figure 5 is a schematic structural diagram of a life cycle assessment device according to an embodiment of the present application.

List of reference signs:

110. Determination of goals and scope;

120, list analysis;

130, impact assessment;

140, explanation;

210. Obtain the LCA model of representative products among similar products;

220. Determine the parameter set in the LCA model representing the product and the relationship between the parameter set and the LCA result;

230. Set the parameters in the parameter set obtained from the original data of the representative product as independent parameters, and set the parameters in the parameter set that cannot be obtained from the original data of the representative product as non-independent parameters to obtain Parametric LCA models of similar products;

240. Obtain the original data of the first product among the similar products;

250. According to the independent parameters of the parameterized LCA model, obtain the values corresponding to the independent parameters of the first product from the original data of the first product;

260. According to the values corresponding to the independent parameters of the first product and the formula, obtain the values corresponding to the dependent parameters of the first product;

270. Use the parameterized LCA model according to the values corresponding to the independent parameters of the first product and the values corresponding to the dependent parameters of the first product to obtain the LCA result of the first product;

301, raw material extraction;

302, transportation;

303, processing;

304, Assembly or production;

305, product operation or use;

306, product maintenance;

307, disassembly;

308, recycling or reuse;

310, Cradle to Gate (component);

320, Cradle to Door (Product);

330, cradle to grave;

400, life cycle assessment device;

410, acquisition unit;

420, processing unit;

500, life cycle assessment device;

501, memory;

502, processor;

503, communication interface;

504, bus.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood that the specific examples in this specification are only to help those skilled in the art better understand the embodiments of the present application, but are not intended to limit the scope of the embodiments of the present application.

It should be understood that in the various embodiments of the present application, the size of the sequence numbers of each process does not mean the order of execution. The execution order of each process should be determined by its functions and internal logic, and should not be determined by the execution order of the embodiments of the present application. The implementation process constitutes no limitation.

It should also be understood that the various implementations described in this specification can be implemented individually or in combination, which is not limited by the embodiments of the present application.

Unless otherwise stated, all technical and scientific terms used in the embodiments of this application have the same meanings as commonly understood by those skilled in the technical field of this application. The terminology used in this application is for the purpose of describing specific embodiments only and is not intended to limit the scope of this application.

With the improvement of environmental protection awareness and the understanding of possible environmental impacts during product production and consumption, people hope to establish some methods to understand and explain these impacts. Life cycle assessment (LCA) is a technology that emerged based on this purpose. LCA can analyze the environmental impact of a product's life cycle from raw materials, production, use, end-of-life handling, recycling and final disposal (i.e. cradle to grave). The ISO standard summarizes the basic structure of LCA into four organically linked parts.

Figure 1 shows an LCA framework suitable for the embodiment of this application, which includes determination of purpose and scope 110, inventory analysis 120, impact assessment 130 and explanation 140. Among them, the determination of goals and scope 110 is used to determine the evaluation goals of LCA, and then define the product functions, functional units, system boundaries, environmental impact types, etc. based on the evaluation goals; the task of inventory analysis 120 is to collect data and perform some calculations The input and output of each life cycle stage of the product are given as the basis for the subsequent impact assessment stage 130; the explanation 140 analyzes and interprets the impact assessment results, identifies the weak links and potential improvement opportunities of the product, and achieves the purpose of ecological optimization of the product. Recommendations for improvement.

In the inventory analysis 120 stage, in order to study the input and output of each life cycle of the product, the relevant input and output of the product system can be quantified by establishing an LCA model of the product. When establishing an LCA model in the existing technology, the LCA software can be modeled through the life cycle inventory (LCI) database and various unit process modules integrated on the LCA software. However, the LCI database contains a large number of similar data sets. These data sets are different for different products in terms of names, representative areas, technical routes, or product allocations. The selection of these data sets depends on the user of the modeling; and for When product modeling, users also need to select multiple unit processes related to the product.

In other words, the user must be a person with professional knowledge in LCA, that is, an expert, in order to select appropriate data sets and unit process modules to build an LCA model for the product system. When studying the impact of multiple products on the environment, experts need to spend a lot of time modeling each product one by one, and for similar products, different modeling personnel will produce LCA reports or environmental reports based on the models. Product declaration (environment product declaration, EPD) is not comparable and cannot provide a reference for the government or consumers to evaluate or select products. Among them, EPD is a document that discloses product environmental information based on LCA. It is a measure of green and low-carbon products.

In view of this, the embodiment of this application proposes a life cycle assessment LCA method. By parameterizing the LCA model of representative products among similar products, a universal LCA model can be established for similar products, thereby reducing the cost of modeling similar products. Difficulty and less modeling time.

Figure 2 shows a life cycle assessment method 200 according to an embodiment of the present application. The method 200 at least includes the following steps 210-230.

210. Obtain the LCA model of a representative product among similar products, which are products that implement the same function.

In the embodiments of this application, similar products can also be called product series or product families, which are collective names for products with a large number of the same or similar features. They can be used to represent products that implement the same functions. Among these similar products, Products can have similar designs, materials used, performance characteristics, etc.

The representative product is a product of its kind, including the product with the most common functions among similar products. Shared functions can be understood as shared parameters or shared attributes. These shared parameters or shared attributes include but are not limited to the type of materials used in the product, the manufacturing steps used for component production and product manufacturing, the energy efficiency and power consumption of the product, etc.; operating mode ( For example, time load, energy efficiency, operation cycle, etc.); transportation mode (truck, air transport, ship, etc.); recycling technology route and efficiency, etc.

It should be noted that the fact that the product includes the most common functions of similar products does not mean that the parameter values representing the common functions of the product and other products of the same kind are equal. The parameters representing the common functions of the product and other products of the same kind The values may all be different or partially different, which is not limited in this application.

In the embodiment of this application, the LCA model representing the product can be established on LCA software. The LCA software can be, for example, Gabi, SimonPro, openLCA, etc.

Specifically, experts can build an LCA model for representative products among similar products on LCA software to obtain an LCA model that represents the product.

220. Determine the parameter set in the LCA model representing the product and the relationship between the parameter set and the LCA result.

Among them, the LCA result refers to the result obtained through the relationship between the parameter set and the LCA result after inputting the parameter value corresponding to each parameter in the parameter set into the LCA model. The LCA results can be the emission results of products to the environment, such as air pollutants, water pollutants, solid pollutants, etc. discharged by products to the atmosphere, water bodies and soil.

In one implementation, the parameter set can be determined by finding parameters in the LCA model representing the product that are different from parameter values of other products in the same category except the representative product. For example, the parameter set may include the unit weight of the first component of the product, the quantity of the first component, the total weight of the first component, the annual operating hours, the energy loss under full load, the energy loss within the lifetime, etc. , the parameters in this parameter set have different parameter values for different products in the same category.

230. Set the parameters in the parameter set obtained from the original data of the representative product as independent parameters, and set the parameters in the parameter set that cannot be obtained from the original data of the representative product as non-independent parameters to obtain The parameterized LCA model of the same product, wherein the parameterized LCA model includes a formula for calculating the dependent parameters from the independent parameters, and the relationship between the parameter set and the LCA result.

Specifically, in the parameter set representing the product LCA model, the parameters obtained from the original data representing the product are set as independent parameters, and the parameters that cannot be obtained from the original data representing the product are set as non-independent parameters, where the non-independent parameters can be passed Independent parameters are calculated.

For example, taking the parameter set in the above example, the unit weight of the first component and the quantity of the first component in the parameter set can be set as independent parameters. The values of these two parameters can be obtained from the original data of the product, for example Obtained from the bill of materials of the enterprise that produces the representative product; the total weight of the first component can be set as a non-independent parameter. The value of this parameter cannot be obtained directly from the original data of the product and needs to be obtained through the independent parameter (the first component's Unit weight, quantity of the first component) is calculated, and the calculation formula is unit weight of the first component × quantity of the first component.

After obtaining the relationship between the parameter set representing the product and the LCA results, and the formula for calculating the dependent parameters from the independent parameters, the relationship between the parameter set representing the product and the LCA results and the formula for calculating the dependent parameters from the independent parameters can be obtained Establish a parametric LCA model of similar products. When studying the impact of similar products on the environment, you only need to input the parameter values corresponding to the parameter sets related to similar products into the parametric LCA model to get the impact of similar products on the environment. Among them, the process of inputting parameter values can be operated by non-professional users, and non-professional users can obtain corresponding parameter values from the original data of similar products based on the parameters in the parameter set.

Through this implementation method, experts only need to build an LCA model once for a representative product among similar products, and then parameterize the LCA model to obtain a general LCA model for similar products. In this way, non-professional users can use the general LCA model for Assessing the environmental impact of any product of the same type can reduce the difficulty and time of modeling similar products.

In some implementations, the LCA method 200 may also include the following steps:

240. Obtain the original data of the first product.

Among them, the first product is any product of the same type except the representative product.

In one implementation, non-professionals can obtain information from the bill of materials (BOM), bill of processes (BOP) and supplier management system (software platform for business operations) of the enterprise that produces the first product. Management (SAP) to obtain the data of each life cycle stage of the first product to obtain the original data of the first product.

250. According to the independent parameters of the parameterized LCA model, obtain the values corresponding to the independent parameters of the first product from the original data of the first product.

It should be understood that the parameter set in the parametric LCA model includes independent parameters and dependent parameters. When calculating the LCA result of the first product, the values corresponding to the independent parameters in the LCA model of the first product must first be obtained. In one implementation, non-professionals can obtain the values corresponding to the independent parameters from the original data of the first product based on the independent parameters in the parameterized LCA model.

260. According to the values and formulas corresponding to the independent parameters of the first product, obtain the values corresponding to the dependent parameters of the first product.

Specifically, the parametric LCA model includes formulas for calculating dependent parameters from independent parameters. Therefore, non-professionals only need to input the values corresponding to the independent parameters of the first product into the parametric LCA model in the LCA software through the user interaction interface. , the parametric LCA model can automatically calculate the corresponding values of the dependent parameters of the first product based on the formula and the values corresponding to the independent parameters of the first product.

270. Use the parametric LCA model according to the values corresponding to the independent parameters of the first product and the values corresponding to the dependent parameters of the first product to obtain the LCA result of the first product.

Specifically, when the values corresponding to the independent parameters and the values corresponding to the non-independent parameters of the first product are obtained, the values corresponding to the parameter set of the first product can be obtained, and the relationship between the parameter set and the LCA result in the parameterized LCA model is used , you can get the LCA result of the first product, that is, the impact of the first product on the environment.

Therefore, when studying the environmental impact of the first product among similar products, non-professionals do not need to establish an LCA model for the first product. They only need to be able to calculate the environmental impact of the first product through the above steps 240-270, thus Reduce the time spent modeling any one product in its class. Moreover, each product in the same category uses the same LCA model to make its results comparable.

In some embodiments, in the above step 270, the parameterized LCA model is used according to the values corresponding to the independent parameters of the first product and the values corresponding to the dependent parameters of the first product to obtain the value of the first product. Before the LCA result, the method 200 may further include: obtaining a system boundary of the first product, where the system boundary includes at least one life cycle stage.

In this embodiment of the present application, the system boundary of the first product refers to which life cycle stages of the first product need to be studied for their impact on the environment.

In some embodiments, the life cycle stages of a product may include a production stage, a use stage, and a retirement stage.

It should be noted that the above three stages are only a way of dividing life cycle stages, and life cycle stages can also be divided into other different stages, which is not limited in this application.

For example, when the system boundary of the first product includes the production stage, that is, cradle to gate, the LCA model established for the first product studies the impact of the first product on the environment during the production stage.

Therefore, in the embodiment of the present application, the user can flexibly set or select the system boundary of the first product according to research needs. Specifically, when inputting the independent parameters of the first product, only the independent data of the life cycle stages in the system boundary are input into the parameterized LCA model, and the LCA results of the first product within the system boundary can be obtained.

In some implementations, the LCA model representing the product may be obtained in step 210 in the following manner: based on the relationship between each life cycle stage of the representative product, the relationship between each unit process in each life cycle stage, and each The unit process inputs flow data, outputs flow data, and establishes an LCA model representing the product.

In the embodiment of the present application, the life cycle stages of the product may include a production stage, a use stage, and a scrap stage. The production phase may include, for example, raw material extraction and manufacturing, processing of materials into components, component assembly production, material transportation, internal product manufacturing and/or assembly, product transportation to distribution points or customers, etc. The use phase may include, for example, product use. unit processes such as product transportation to product disassembly and recycling sites; the end-of-life phase may include unit processes such as dismantling and recycling, reuse of related materials and components, recycling, incineration and landfilling. Each unit process has input stream data and output stream data. Among them, the input stream data can be the input data of the unit process, such as the bill of materials of raw materials, the bill of materials of components, etc.; the output stream data can be the data output by the unit process, such as produced components, products, sub-products, scrap, etc. .

After obtaining the input flow data and output flow data of each life cycle unit process, an LCA model framework can be established based on the relationship between each life cycle stage of the product and the relationship between each unit process, and each unit can be The input flow data and output flow data of the process are associated with the corresponding unit processes to obtain an LCA model representing the product.

In order to facilitate understanding of the establishment process of the LCA model of the product, embodiments of the present application provide a schematic block diagram of the life cycle stages and system boundaries of the product.

As shown in Figure 3, through a variety of different raw material extraction 301 processes, a variety of different raw materials can be obtained from the natural environment. Some of the raw materials need to be transported to the factory for processing 303 in order to form components required for various manufacturing products; other raw materials do not need to be processed and can be directly used as components for subsequent assembly or production 304 . The components are transported to the factory for assembly or production 304 to form the product. When the product is being operated or used 304 , product maintenance may be required 306 . When the product reaches its service life or cannot be used, the product will be transported to a scrap factory for recycling or reuse 308 . Some products may need to be disassembled 307 before they can be recycled and reused. 308, the entire life of the product ends.

Among them, from the perspective of system boundaries, the process from raw materials to components can be seen as the process from cradle to door (component) 310, the process from raw materials to products can also be seen as the process from cradle to door (product) 320, and the process from raw materials to the end of life. It can be regarded as the cradle to the grave330; from the perspective of the life cycle, the entire process from raw materials to products is the production stage of the product340, the operation or use and maintenance of the product are the use stage of the product350, the disassembly, recycling or Reuse is the end-of-life stage of products360.

Taking the life cycle of a micro circuit breaker as an example, raw material extraction 301 includes resource extraction, refining, material production and other steps; processing 303 includes thin plate rolling, die-casting, punching, drawing, and pressing of the metal and alloy obtained in step 301. Molds and coatings are formed into polymers, and then the polymers are injection molded and cast to form components; the components are transported to the factory for assembly or production 304 to become micro circuit breakers; micro circuit breakers usually do not require maintenance and will be replaced after 20 years of use. It is transported to end-of-life plants for disassembly, recycling or reuse.

Each step of the above-mentioned products from raw materials to end of life can be considered as a unit process, and each unit process will have its corresponding input flow data and output flow data. When establishing an LCA model representing a product, the LCA software includes a variety of unit process modules. Experts can select the unit process modules belonging to the representative product in the LCA software, and all selected unit process modules will be based on the life cycle of the representative product. and the relationships between unit processes in each life cycle stage, and then associate the input flow data and output flow data of each unit process with the corresponding unit process to form an LCA model representing the product. .

In some implementations, the input flow data and output flow data of each unit process can be obtained in the following ways: obtaining the original data representing each life cycle stage of the product from the BOM, BOP and SAP of the enterprise that produces the representative product. ;Acquire the input flow data and output flow data of each unit process in each life cycle stage based on the original data representing each life cycle stage of the product, the LCA standards related to the representative product category, and the LCI database.

It should be understood that each life cycle stage of a representative product involves a large amount of raw data, which can be obtained from the BOM, BOP and SAP of the enterprise that produces the representative product. For example, in the production stage representing a product, the original data in the BOM can include the name of the component, material type, unit weight, and the quantity of such components used, and the original data in the BOP can include the process of processing raw materials into components. Or data such as steps. The original data in SAP includes data such as supplier location, distance, and transportation mode (truck, train, plane, ship).

Optionally, after the expert obtains the original data representing each life cycle stage of the product, the original data can be expressed in the form of a table or document to form a bill of materials representing the product. The bill of materials clearly indicates the data type of raw data that needs to be obtained in order to find and update the data.

After obtaining the original data representing the product, the original data is associated with each unit process to obtain the original data for each unit process. Some of the input stream data and output stream data are raw data representing products, and some are data that need to be calculated based on the raw data.

Part of the input stream data and output stream data of each unit process is original data, and some of it needs to be calculated based on the original data. Therefore, the calculation formulas for calculating part of the input flow data and output flow data can also be obtained from the LCA standards and LCI databases related to the representative product categories, and the input flow data and output flow of each unit process can be obtained according to the relevant formulas. data.

It should be noted that when the original data of the product is incomplete or unavailable, the LCA standards related to the representative product category and the data in the LCI database can also be used as the input flow data and output flow data of each unit process.

In some implementations, after experts establish a parametric LCA model in LCA software for similar products, the parameterized LCA model is saved in the parametric LCA model pool of the LCA software. When it is necessary to conduct environmental impact on similar products representing the product When researching, just select and use the corresponding parameterized LCA model.

Figure 4 shows a schematic block diagram of a life cycle assessment LCA device 400 according to an embodiment of the present application.

As shown in Figure 4, the LCA device 400 includes:

The acquisition unit 410 is used to acquire the LCA model of a representative product among similar products, which are products that implement the same function.

The processing unit 420 is used to determine the parameter set in the LCA model representing the product and the relationship between the parameter set and the LCA result; set the parameters obtained from the original data of the representative product in the parameter set to Independent parameters, parameters in the parameter set that cannot be obtained from the original data of the representative product are set as non-independent parameters to obtain a parameterized LCA model of the similar products, wherein the parameterized LCA model includes parameters obtained from the original data of the representative product. Independent parameters The formula for calculating dependent parameters, and the relationship between said parameter set and LCA results.

Figure 5 is a schematic diagram of the hardware structure of the life cycle assessment device according to the embodiment of the present application. The life cycle assessment device 500 shown in FIG. 5 includes a memory 501, a processor 502, a communication interface 503 and a bus 504. Among them, the memory 501, the processor 502, and the communication interface 503 realize communication connections between each other through the bus 504.

The memory 501 may be a read-only memory (ROM), a static storage device, and a random access memory (RAM). The memory 501 can store programs. When the program stored in the memory 501 is executed by the processor 502, the processor 502 and the communication interface 503 are used to execute various steps of the mobile storage device management method in the embodiment of the present application.

The processor 502 may be a general central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), a graphics processing unit (GPU), or one or more The integrated circuit is used to execute relevant programs to implement the functions required to be performed by the units in the device type identification device according to the embodiment of the present application, or to perform the method of managing and controlling the mobile storage device according to the embodiment of the present application.

The processor 502 may also be an integrated circuit chip with signal processing capabilities. During the implementation process, each step of the mobile storage device management and control method in the embodiment of the present application can be completed by instructions in the form of hardware integrated logic circuits or software in the processor 702 .

The above-mentioned processor 502 can also be a general-purpose processor, digital signal processing (DSP), ASIC, off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. Each method, step and logical block diagram disclosed in the embodiment of this application can be implemented or executed.

The communication interface 503 uses a transceiver device such as but not limited to a transceiver to implement communication between the device 500 and other devices or communication networks. For example, the traffic data of the unknown device can be obtained through the communication interface 503.

Bus 504 may include a path that carries information between various components of device 500 (eg, memory 501, processor 502, communication interface 503).

It should be noted that although the above-mentioned device 500 only shows a memory, a processor, and a communication interface, during specific implementation, those skilled in the art will understand that the device 500 may also include other devices necessary for normal operation. At the same time, based on specific needs, those skilled in the art should understand that the device 500 may also include hardware devices that implement other additional functions. In addition, those skilled in the art should understand that the device 500 may only include components necessary to implement the embodiments of the present application, and does not necessarily include all components shown in FIG. 5 .

Embodiments of the present application also provide a computer-readable storage medium that stores program code for device execution, where the program code includes instructions for executing steps in the above method of life cycle assessment.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person familiar with the technical field can easily think of various equivalent methods within the technical scope disclosed in the present application. Modification or replacement, these modifications or replacements shall be covered by the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A method of life cycle assessment LCA, characterized in that the method includes:

Obtain (210) the LCA model of a representative product among similar products, which are products that implement the same function;

Determining (220) a parameter set in the LCA model representing the product and a relationship between the parameter set and the LCA results;

The parameters obtained from the original data of the representative product in the parameter set are set as independent parameters, and the parameters in the parameter set that cannot be obtained from the original data of the representative product are set as non-independent parameters to obtain (230 ) The parametric LCA model of the same product, wherein the parametric LCA model includes a formula for calculating the dependent parameters from the independent parameters, and the relationship between the parameter set and the LCA result.
The method according to claim 1, wherein determining the parameter set in the LCA model representing the product includes:

Determine the parameters in the LCA model of the representative product that are different from the parameter values of other products in the similar products except the representative product to obtain the parameter set.
The method according to claim 1 or 2, characterized in that, the method further includes:

Obtain the original data of the first product among similar products described in (240);

According to the independent parameters of the parameterized LCA model, obtain (250) values corresponding to the independent parameters of the first product from the original data of the first product;

According to the values corresponding to the independent parameters of the first product and the formula, obtain (260) the values corresponding to the dependent parameters of the first product;

According to the values corresponding to the independent parameters of the first product and the values corresponding to the dependent parameters of the first product, the parameterized LCA model is used to obtain (270) the LCA result of the first product.
The method according to claim 3, characterized in that, according to the values corresponding to the independent parameters of the first product and the values corresponding to the dependent parameters of the first product, the parameterized LCA model is used to Before obtaining the LCA result of the first product, the method further includes:

Obtain the system boundary of the first product, where the system boundary includes at least one life cycle stage, to obtain the LCA result of the first product within the system boundary.
The method according to claim 4, characterized in that the life cycle stages include a production stage, a use stage and a scrap stage.
The method according to any one of claims 1 to 5, characterized in that before obtaining the LCA model of a representative product among similar products, the method further includes:

Obtain the product that has the most common functions among the similar products to obtain the representative product.
The method according to any one of claims 1 to 6, characterized in that obtaining the LCA model of a representative product among similar products includes:

Based on the relationship between each life cycle stage of the representative product, the relationship between each unit process in each life cycle stage, and the input flow data and output flow data of each unit process, all the relationships are established. Describe the LCA model representing the product;

The LCA model representing the product includes the relationship between the input flow data and output flow data of each unit process and the LCA result representing the product;

The input stream data and output stream data of each unit process include data calculated from the original data representing the product through the formula.
The method according to claim 7, characterized in that before obtaining the LCA model of a representative product among similar products, the method further includes:

Obtain raw data for each life cycle stage of the representative product from the bill of materials, process list and supplier management system of the enterprise that produces the representative product;

According to the original data of each life cycle stage of the representative product, the LCA standard related to the representative product type and the life cycle inventory database, the input flow data and output flow data of each unit process are obtained.
A device for life cycle assessment LCA, characterized in that the device includes:

The acquisition unit (410) is used to obtain the LCA model of representative products among similar products, which are products that implement the same functions;

Processing unit (420), configured to determine the parameter set in the LCA model representing the product and the relationship between the parameter set and the LCA result; set the parameter set to the parameters obtained from the original data of the representative product Set as independent parameters, set the parameters in the parameter set that cannot be obtained from the original data of the representative product as non-independent parameters to obtain a parameterized LCA model of the similar products, wherein, in the parameterized LCA model Includes a formula for calculating the dependent parameters from the independent parameters, and a relationship between the parameter set and the LCA results.
A device for life cycle assessment LCA, which is characterized by including:

Memory (501), used to store programs;

A processor (502) configured to execute a program stored in the memory (501). When the program stored in the memory (501) is executed, the processor (502) is configured to execute a program according to claims 1 to 8. The method of LCA described in any one.
A computer-readable storage medium, characterized in that the computer-readable medium stores program code for device execution, and the program code includes a program code for executing the life cycle according to any one of claims 1 to 8. Instructions for steps in methods for evaluating LCA.