EURO 2025 Leeds
Abstract Submission

2286. Energy efficient tramp shipping

Invited abstract in session MD-32: Low- and zero-emission solutions for maritime operations-1, stream Maritime and Port Logistics.

Monday, 14:30-16:00
Room: Maurice Keyworth 1.09

Authors (first author is the speaker)

1. LINE REINHARDT
Institute for people and technology, Roskilde universitet
2. Agnieszka Sivertsen

Abstract

Tramp shipping is one of three major types of shipping. Here we optimize a supply demand bulk problem with multiple commodities in an effort to reduce the operational cost per shipped commodity weight. A major cost is the energy consumption, thus, by reducing the energy consumption the emissions are reduced accordingly. Clearly the energy should be measured by the amount of cargo shipped as the aim is to ensure efficient shipping. The problem presented is a real-life problem encountered by a company and therefore, the formulation also considers flexible demand (More or Less Owner Option), heterogeneous vessels, draft and start and end point of vessels in the objective. An arc flow and a path flow model are presented and compared and real-life instances with 1 to 4 commodities, 6 to 16 ports and 3 to 7 vessel types are tested. Since the objective is fractional, a parametric algorithm is used to solve the presented models. Results show that solutions can be achieved in reasonable time using the parametric method for the real-life sized instances, however, the path flow model will grow exponentially when the size of the problem grows.

Keywords

Status: accepted

Back to the list of papers