ShipNetSim: An Open-Source Simulator for Real-Time Energy Consumption and Emission Analysis in Large-Scale Maritime Networks

The maritime industry is a major contributor to global greenhouse gas emissions, for which new and innovative tools need to be developed to enhance energy efficiency and cut ship emissions. This paper introduces ShipNetSim, an open-source multi-vessel simulator that targets real-time quantification of marine fuel consumption and emissions over large-scale shipping networks. ShipNetSim combines propulsion-resistance models, ship-following dynamics, and path finding algorithms with the ability to simulate the longitudinal vessel motion and provide insight into the vessels’ energy consumption and their environmental impact. The simulator adapts to changing ship type, environmental conditions, and fuel sources, providing robust and scalable performance. Using real routes and ship specifications, case studies performed confirm the accuracy of the model and highlights the potential for fuel-consumption and operational-efficiency improvements. Additionally, the ability of the simulator to model operational policy-driven changes in the form of reduced speeds or alternative fueling strategies positions it as a leading-edge tool to help inform compliance with international maritime regulations, including those regarding carbon-reduction targets posed by the International Maritime Organization (IMO). Thus, ShipNetSim offers a unique mix of technical precision and environmental relevance by integrating two fields: that of maritime engineering and global sustainability efforts.