Development And Application Of Industrial Carbon Footprint Accounting System For Silk Products Based On LCA

As the trend of global warming intensifies,countries have successively introduced low-carbon development strategies.The carbon footprint theory provides a unified standard and quantification tool for low-carbon development,and has become a research hot spot in recent years.Life Cycle Assessment(LCA)is a comprehensive method for identifying the environmental impact of products or processes throughout their life cycle,covering stages such as raw material production,product manufacturing,transportation,consumption,and waste disposal.Silk products involve a complex supply chain and a long production cycle.Therefore,the application of LCA methods to calculate their carbon footprint is persuasive,scientific,and comprehensive.However,there are problems such as poor accounting of product interconnections,low efficiency of inventory data use,low accuracy of accounting models,and high duplication of LCA systems.Therefore,this article uses modular and parameterized methods to construct an industrial carbon footprint accounting model,in order to provide methodological reference for carbon footprint accounting in the industrial production stage of silk products.The main research contents are as follows:(1)Combining the latest product modularization theory and the LCA system framework internationally,this article divides the entire silk industry production process into several carbon footprint process unit modules(UPF).In view of the characteristics of various silk products and the complexity of the weaving process chain,the industrial carbon footprint of silk is divided into three levels,and a clear accounting boundary and allocation principle modular accounting model of silk products is established.(2)The UPF module is parameterized.By collecting parameters of power consumption processes and equipment,the theoretical power consumption of processes or equipment per unit time can be calculated,and the industrial carbon footprint of silk products can be accounted for.Based on the production status of silk products in actual factories and related parameters,and focusing on the theory of silk production,the modular process units of winding,weaving,dyeing and finishing,and finished product are parameterized.(3)Based on the above research theory,this article establishes an LCA database for silk products(SILK database),which stores a large number of UPF modules.It can directly call production parameters by matching production equipment,and can also add and modify UPF modules.An LCA system for calculating the industrial carbon footprint of silk products(SILK-LCA system)has been developed.Compared with existing LCA systems,the SILK-LCA industrial carbon footprint accounting system developed in this project has the following advantages:(1)Adopting modularization methods to decompose the production process of silk products into several UPFs,which improves the quality and reuse efficiency of inventory data.(2)The UPF module is parameterized,which simplifies the process of collecting inventory data,improves data accuracy,and refines the industrial carbon footprint accounting model of silk products,thereby improving the accuracy of accounting results.(3)The introduction of correction factors corrects the results of the industrial carbon footprint accounting model of silk products,making the theoretical carbon footprint tend to the actual carbon footprint,and improving the authenticity of accounting results.(4)A silk product LCA system and database with a unified accounting boundary,accounting path,benchmark time,and splitting principle have been established,which reduces the complexity of LCA system operation,improves the comparability of accounting results,and enhances the efficiency of enterprises and research institutions in developing green silk products and upgrading low-carbon silk production processes.As the focus of this article is on the industrial carbon footprint of silk products,according to LCA theory,future research can be conducted on mulberry tree planting,silkworm breeding,retail,washing,drying,ironing,regeneration,etc.