Given the expectation of a global carbon levy, what options are already available in the maritime sector to reduce emissions?
Several machinery energy saving systems have been available for a long time in the shipping sector. These tend to enhance the performance of the main engine, auxiliary engines, or boiler, depending on vessel type and operational profile.
- Hull structures and propulsion systems
A retrofit of the bulbous bow is a measure to optimise the hull to a new operational profile, typically for a lower design speed. A retrofit of bulb may decrease fuel consumption on a main engine by up to 5%.
- Operational efficiency
In addition, vessel crew can reduce CO2 emissions significantly by undertaking specific operational measures. Running the machinery at optimal engine load, slow steaming and well-established maintenance routines can have a significant impact. When sailing, accurate weather forecasting, carefully planned routes, as well as trim and draft optimisation, have additional and considerable energy saving effects.
- Point versus range optimisation
Observing the speed versus fuel consumption is one of the key measures to assess the efficiency of a vessel. In this regard, there has been a shift in the design philosophy of ships.