Optimization Research On Cold Chain Distribution Routes Considering Carbon Emissions For Fresh Agricultural Products

Agricultural production is increasing year by year, and also people’s quality request about fresh agricultural products is become increasingly high, which provide a great space for cold chain logistics development. As we all know, logistics industry is energy guzzler. Cold chain logistics, with high energy consumption and high carbon emissions, has a contradictory relationship with the concept of "low carbon economy" So it is necessary to balance the relationship between economic and environmental impact in the process of cold chain logistics rapid development.This paper first discusses the characteristics of fresh agricultural products distribution and analyzes the trade-off relation between cold chain and low carbon in the mode of agricultural supermarket docking which is the new agricultural product circulation pattern. And then construct the carbon emissions function by the analysis of the source of carbon emissions in the process of cold chain distribution, and further figure out the carbon emissions cost by the carbon tax. Besides, this paper also analyzes the other costs happened in the process of distribution, including the fixed costs, transportation costs, loss costs, refrigeration costs. After that, a group of costs functions are located, and then establish the cold chain logistics distribution route optimization model, with the constraint of vehicle load and soft time windows. The total costs functions are proposed as optimized object. As for the solution, a genetic algorithm with suitable chromosome coding method and genetic operators is applied to solve this model.Finally, the paper presents an example to demonstrate the rationality of the proposed model and the effectiveness of the algorithm. Respectively using matlab software to calculate the optimal distribution route scheme under the condition of considering carbon emissions and does not consider carbon emissions. The results of the numerical experiments show that consider carbon emissions in the process of cold chain logistics distribution can effectively reduce the emission of carbon dioxide as well as reduce the operating costs. The research conclusion can provide reference suggestions about the distribution route optimization for fresh agricultural products cold chain logistics enterprise.