It mainly focuses on the calculation and optimization of carbon emission from sand casting, which mainly includes four parts: the analysis of carbon source composition in sand casting process, the classification of sand casting process design parameters, and the proposal of carbon emission calculation model based on sand casting process design parameters, The optimal solution of carbon emission calculation model of sand casting, carbon emission calculation under certain process conditions and low-carbon optimization of sand casting process design parameters.
- Combined with the research status of carbon emission at home and abroad and the energy-saving strategies formulated by various government organizations, this paper puts forward the necessity of carbon emission calculation and low-carbon optimization in the design stage of sand casting for the proportion of carbon emission in manufacturing industry, especially sand casting industry, and the distribution of current main research points. In addition, it points out the shortcomings of research in this field, especially the lack of methods to realize energy conservation and emission reduction through low-carbon optimization of process parameters, and points out the importance and feasibility of research in this field.
- The process of sand casting and the input and output of material flow, energy flow and waste logistics are analyzed. According to the characteristics of sand casting process design parameters, the sand casting process design parameters are divided into independent process design parameters, coupled process design parameters and inherent process design parameters.
- The carbon source characteristics of different streams are analyzed, and the material carbon source emission model, energy carbon source emission model and unexpected carbon source emission model are established. According to the differences of material use and calculation methods, the material carbon source emission model is divided into one-time material carbon emission, reusable material carbon emission and equally shared material carbon emission, On this basis, the carbon emission calculation model of sand casting based on process design parameters is established.
- Combined with genetic algorithm, taking the carbon emission model in Chapter 2 as the objective function, the representative parameters are extracted as variables, and the optimization method with sand casting process design parameters as variables is proposed.
The carbon emission of the casting process is calculated under the conditions of 5 sand mold design schemes, and a calculation scheme of the carbon emission of the casting process is given by using the software; Then the genetic algorithm with sand casting process parameters as variables in Chapter 4 is used to solve the global optimization of the carbon emission calculation model with carbon emission as a function. Finally, the obtained solution is used to formulate design scheme 2, and then the quality is verified by simulation software. Finally, the carbon emission of design scheme 2 is calculated The calculation results include different types of parameters and carbon emissions under different carbon sources. Finally, the carbon emission components of the two schemes are compared and analyzed in an all-round way.