期刊
TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES
卷 69, 期 -, 页码 79-90出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.trc.2016.05.017
关键词
Maritime transportation; LNG supply chain; Annual delivery plan; Arc-flow models
We investigate the problem of designing an optimal annual delivery plan for Liquefied Natural Gas (LNG). This problem requires determining the long-term cargo delivery dates and the assignment of vessels to the cargoes while accommodating several constraints, including berth availability, liquefaction terminal inventory, planned maintenance, and bunkering requirements. We describe a novel mixed-integer programming formulation that captures important industry requirements and constraints with the objective of minimizing the vessel fleet size. A peculiar property of the proposed formulation is that it includes a polynomial number of variables and constraints and is, in our experience, computationally tractable for large problem instances using a commercial solver. Extensive computational runs demonstrate the efficacy of the proposed model for real instances provided by a major energy company that involve up to 118 cargoes and a 373-day planning horizon. (C) 2016 Elsevier Ltd. All rights reserved.
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