期刊
TRANSPORTATION SCIENCE
卷 44, 期 3, 页码 400-415出版社
INFORMS
DOI: 10.1287/trsc.1100.0317
关键词
branch-and-price; column generation; maritime transportation
资金
- Research Council of Norway
- Bernt Fossum's Fund for Research within Applied Engineering Economics at Norwegian University of Science and Technology
- National Sciences and Engineering Research Council of Canada
We consider a maritime inventory routing problem in the liquefied natural gas (LNG) business, called the LNG inventory routing problem (LNG-IRP). Here, an actor is responsible for the routing of the fleet of special purpose ships, and the inventories both at the liquefaction plants and the regasification terminals. Compared to many other maritime inventory routing problems, the LNG-IRP includes some complicating aspects such as (1) a constant rate of the cargo evaporates each day and is used as fuel during transportation; (2) variable production and consumption of LNG, and (3) a variable number of tanks unloaded at the regasification terminals. The problem is solved by a branch-and-price method. In the column generation approach, the master problem handles the inventory management and the port capacity constraints, while the subproblems generate the ship route columns. Different accelerating strategies are implemented. The proposed method is tested on instances inspired from real-world problems faced by a major energy company.
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