Optimization Research On Cold Chain Logistics Distribution Routes Based On Green Degree

Under the background of promoting green development,governments and enterprises are paying more and more attention to green logistics,and the joint distribution model is becoming the trend of cold chain logistics management.However,in the related research,few scholars consider the green logistics,cold chain logistics,common distribution,vehicle routing optimization four themes at the same time.In this paper,the green vehicle routing problem of cold chain logistics is studied from the point of joint distribution.This study is of great theoretical and practical significance to guide the implementation of green logistics in Chinese cold chain enterprises,help cold chain enterprises to improve the efficiency of the use of logistics resources,reduce the logistics process of pollutant emissions,and promote the development of cold chain logistics,it has important theoretical and practical significance.In this paper,the following research results are achieved:(1)Analyzes the difference and connection between green logistics and low-carbon logistics,and establishes the index system to measure the green degree of cold chain logistics.In order to evaluate and quantify the impact of cold chain logistics on the environment,quantitative calculation model of fuel consumption and pollutant emission of truck is given.(2)Cold chain logistics VRP model with the objective of minimizing the total cost under the conditions of "multi-depot" and "customer soft time window" is constructed.The costs of cold chain distribution including the cost of vehicle,cooling cost,time penalty,energy cost,pollutant discharge cost.The pollution discharge cost includes the greenhouse gas emission cost?the air pollutant discharge cost and the solid waste discharge cost.(3)The ant colony algorithm is designed to solve the model.Simulation experiments are carried out on different scale examples to compare and analyze the optimal distribution path under considering the green degree and not considering the green degree.The experimental results show that,the implementation of the green logistics in the cold chain logistics can effectively reduce energy consumption and pollutant emissions.Finally,the validity of the model and algorithm is verified.