Energy Efficiency Aspects
In general, observing the following will lead to energy efficiency and emission reduction
Carrying less ballast water: The displacement of a vessel is a function of lightweight, fuel, cargo and ballast weights. As such, less ballast water means lower displacement and lower resistances (or more cargo). Therefore, it is generally desirable to have less ballast from an energy efficiency point of view. Of course this should not contravene any of the regulations nor compromise ship safety.
Optimizing use of the equipment: This item relates to the use of ballast water equipment via management of the amount of ballast water to uptake, discharge, correct method of uptake/discharge and so on. The aim would be to reduce or optimise the usage of relevant ship-board equipment.
Efficient ballast management operations: This means performing ballast exchange or ballasting and de-ballasting in a way that is more energy efficient. Like trim optimisation, steam driven ballast pumps and ballast exchange methods using.