Evaluation of carbon dioxide emission based on energy efficiency existing ship index during oceanographic navigation

ABSTRACT

This paper evaluates the energy-saving potential of ships by analyzing their carbon dioxide emissions on 20 oceanic voyages using weather routing. The Energy Efficiency Existing Ship Index (EEXI) is used to measure a ship's energy efficiency. The voyages include routes connecting major international seaports and hubs in Asia and North America. Practical measurements were taken on board the ships using weather routing reports and ship record data. The study reveals that the E05 and W05 routes are the most energy-efficient, while the E01 and W08 routes have the highest emissions and fuel consumption. The E05 route has the optimum EEXI and the lowest CO2 emissions. Conversely, the E10 route has the highest EEXI, while W08 has the highest fuel consumption and the worst EEXI. The study emphasises the importance of reducing greenhouse gas emissions and improving energy efficiency in the shipping industry. The results demonstrate the potential benefits of using weather routing and EEXI for assessing and improving the energy efficiency of ships.

KEYWORDS:

• Energy saving for ship
• oceanographic navigation
• fuel consumption
• carbon dioxide emissions
• energy efficiency existing ship index (EEXI)

Acknowledgments

The paper thanks Mr. Lu, Zhi-ming, who provides a track of weather routing in his master's thesis. Analysis of between Meteorological Route and navigational safety North Pacific- Ocean route as Sample https://hdl.handle.net/11296/3tu6g7

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work is partially supported by the National Kaohsiung University of Science and Technology (NKUST), Taiwan, [grant no 111E9010P01].