Abstract
Study on fresh food safety reliability and temperature control has being a research focus in the fresh food cold distribution optimization study field. On this basis, optimization of transportation routing problem with time windows for fresh food in time-varying road network is studied by considering both economic cost and fresh food safety loss. A calculation method for path division strategy is designed. A food safety value loss measurement function, a metric function of energy and heat conversion a measure function of carbon emission rate are employed by considering time-varying vehicle speeds, fuel consumptions, cost of temperature control, the loss of food safety reliability and carbon emissions from transportation and temperature control. The fresh food cold chain distribution vehicle routing problem model with time windows in time-varying road network is formulated based on the objective of the distribution cost and food safety value loss minimization. According to the characteristics of the model, an adaptive improved ant colony algorithm is designed. Finally, the experimental data show that the model can effectively avoid the congestion period, reasonably control the refrigeration temperature, reduce the distribution cost, and improve food safety.
Highlights
The new economic structure has stimulated a rapid development of the fresh food e-commerce industry
(2) In terms of computing time, compared with the two conventional algorithms, the improved ant colony algorithm (IACA) in this paper mainly considers the starting time calculation and the improvement of state transition probability, but the time consuming of the three algorithms is similar, and all of them can get the optimal results in relatively less time
Traffic congestion has become a common phenomenon in cities, which prolongs the driving time during cold chain logistics transportation and significantly increases both the temperature control cost and the food safety loss
Summary
The new economic structure has stimulated a rapid development of the fresh food e-commerce industry. People have increasingly high standards for the quality of fresh food. The current fresh food logistics distribution system is still imperfect. The high logistics costs, the serious loss and highly reduced safety of fresh food, and the low transportation rate have become the key factors in cold chain logistics that constrain the development of fresh food e-commerce. Optimal planning of cold chain logistics distribution routes can reduce the distribution costs, ensure the hygiene and safety of fresh food, and increase customer satisfaction and reduce energy consumption and carbon emissions, achieving environmental protection
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