Study On Carbon Emissions Of Coal Supply Chains In A Mining City

Global warming, a serious threat to human survival and development in the future, is increasingly outstanding. In China, the coal resources provided power support for our country, at the same time, it has become the main source of carbon emissions in Chin,. As the main energy consumption and carbon emitter, the coal has been become the focus of the carbon emissions research and implementation of energy conservation and emissions reduction naturally. In this paper, the coal supply chain carbon emissions was selected as the research object, the coal supply chain model and the carbon source decomposition model were set up, and the entire coal supply chain can be divided into four links,. the coal supply chain carbon emissions system dynamics(SD) model diagram was established to predict the future coal supply chain carbon emissions under different scenarios of wu’an city. The results and conclusion as follow:(1) The coal supply chain carbon emissions model was established based on life cycle analysis method. And the coal mining area structure of carbon source was concluded and carbon boundary was determined based on the process of applying life cycle analysis, throughout the coal production, processing, coal transportation to the main sources of coal consumption, which include direct carbon source and indirect carbon source.(2).The measurement of the impacts of carbon storage capacity under the road network model. Since the layout of the ring roads that direct transportation around the city, it has formed a pattern with rings of development expanding outward from a central core, which led to the carbon sequestration capability loss in the regions centralized near ring roads, and the cultivated land and forest land have converted into construction land or bare land, resulting in the original vegetation carbon sequestration capacity reduced. The loss of the carbon sequestration capacity value is also the indirect negative effect of coal supply chain.(3).The calculation of coal supply chain carbon emissions inventory. Coal supply chain is a complete system, and the calculation of coal mining, coal processing, coal transportation and the final coal consumption are the foundations and key points in the research of coal supply chain carbon emissions. By listing the coal listing can be more intuitive understanding of the coal supply chain carbon emissions effect, and to provide favorable help for the key implementation work of energy conservation and emissions reduction.(4). Coal supply chain carbon system dynamics model. The system dynamics model is combined the qualitative analysis firstly and then the analysis of the system to obtain the chart of system structure and the dynamic system, through the quantitative analysis to quantify the relationship between the various subsystems, and do the iteration process with the formula in time for the state vector, then the simulation experiment was carried out, based on gap between simulation value and actual ones to correct the model and the relevant function relation, and forecasts the future of the system. Repeatedly do the process of "run- contrast- adjustment- run-contrast” to modify the model structure and parameters to improve the accuracy of the model. In this paper, coal supply chain carbon emissions system dynamics model was established on the basis of other scholars’ researches, and combining with the different development scenarios simulation to predict the future coal supply chain development trend of carbon emissions in a mining city.