Ship In-Port Operational Energy Efficiency Measures

When the ship arrives at a port, there are some limited scope for the ship to reduce its fuel consumption while at anchor or at berth. Despite the fact that such reduction in fuel consumption may not have significant impact on a ship’s overall annual fuel consumption; the impact on port air quality could be significant. Therefore, the question if ship-board staff could do anything to support a more efficient ship-in-port operation is main topic of this section.

A number of measures could be identified that if implemented would reduce fuel consumption for the benefit of ship’s energy efficiency and port air quality. These measures are analysed by assuming that ship will not be connected to shore power or a major switch in terms of fuel type will not take place as these changes may make some of the arguments put forward herein redundant.

The aspects covered in this section are simple day to day ship-board operational measures that can be undertaken by all ships. In fact, some of them could be implemented also by harbour and port support vessels. The main ship-board systems working when ship is at anchor or at berth include:

  • Auxiliary machinery and equipment
  • Diesel generators,
  • Boilers

Additionally, and on some ships, cargo handling equipment may be in operation that would provide extra opportunities and further measures for energy saving. However, in this section, the above three items are only investigated (MariEMS 2017).