Emission Reduction Potential of Hybrid Propulsion: A Case Ferry from Istanbul

İnal Ö. B., Charpentier J., Deniz C.

International Graduate Researh Symposium, İstanbul, Turkey, 1 - 03 June 2022, pp.50-56

  • Publication Type: Conference Paper / Full Text
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.50-56
  • Istanbul Technical University Affiliated: Yes


The International Maritime Organization, the ruler of the maritime industry, aims to reduce shipsourced emissions to cope with the greenhouse gas and pollutant emissions which are not only one of the main drivers of global warming but also have very serious harmful effects on human health, especially in cities with ports. In line with this objective, evolutions on ship propulsion systems are the key points to enhancing the total efficiency by decreasing fuel consumption and emissions. In addition to the conventional marine diesel engine-powered systems, hybrid power and propulsion topologies attract the attention of the maritime industry. Today, the majority of the marine hybrid systems use a diesel engine-battery combination which is very efficient, especially during maneuvering. Hybrid power systems are particularly advantageous thanks to their ability to reach higher efficiency in the case of partial loads. However, the ultimate zero-emission goal is impossible with this configuration due to the use of fossil fuel for marine diesel engines. On the other hand, it seems like the best option during the transition to green shipping. In this study, the operational data of a ferry operating between Kadıköy – Eminönü, the two ports of Istanbul, is gathered and analyzed. The fuel consumption and emission profile have been extracted according to the load changes and power demand of the propulsion system during berthing, cruising, and maneuvering. Respecting the possible hybridization methods and their equipment characteristics, approximate fuel-saving and emission reduction potential has been estimated. It is shown that hybrid drive systems are an important option to reduce fuel consumption and greenhouse gas emissions, especially for ships with short sea trials and high load transitions.