The BOS emulsified fuel systems works on the principle of adding water into the fuel in such a way that it produces an emulsified fuel that creates a secondary atomisation effect after the primary injection process. The secondary atomisation effect creates even smaller fuel droplets after injection. This significantly improves the combustion of the fuel inside the engine cylinders as even more total surface area of the fuel is exposed to combustion. The secondary atomization process is illustrated in the picture below.


Blue Ocean Solutions focuses on marine diesel engines. Our Emulsified Fuel System is compatible with both slow speed and medium speed marine diesel engines, and works effectively with both new and old engines as the secondary atomization effect is independent of the age of engines. Moreover, as the EFS is installed in the fuel oil service system of the engines, no modifications or adjustments are needed to the actual engines.

The emulsified fuel system is comprised of three main modules. These are the emulsifier module, the water controller module and the EFS signal box. The following are the sizes of the footprint of the modules:

–   Emulsifier module (min/max): 0.5 x 1m / 1 x 2m

–   Water controller module (min/max): 0.7 x 1m / 1 x 2m

–   Signal box: 0.15 x 0.2m

The actual size may vary and can be customised according to the engine room arrangement.

EFS can be used with HFO, MGO and MDO to deliver confirmed and proven fuel savings and reductions in NOx. Chemical additives are not needed. The additional benefits of running MGO with EFS is higher viscosity and the cooling effect of water. There is no need for a cooler.

There is no need for any chemical additives

The BOS Emulsifier was developed after extensive research into methods for producing optimal water-in-fuel emulsions for achieving the best fuel savings. The non-dimensional emulsifier model (patented) was developed to ensure that the BOS emulsifier can be scaled to meet the fuel flow range for any vessel.

Other emulsifiers in the market make use of one of the following methods of emulsification.

  • Mechanical shearing/ homogeniser
  • Cavitation
  • Ultra-sonic vibration

All of the above methods have the following drawbacks:

  • Rapid performance deterioration due to the wear of parts in the marine environment.
  • Unreliability because of the above reasons.
  • They continuously break the water-in-fuel particles in the re-circulated fuel to nano-sized water particles which do not create the secondary explosion effect. Too small water-in-fuel particles do not have enough energy to produce the desired explosive effect.

In summary, the innovative features that differentiate BOS Emulsifier from others are:

  • Produces optimal water-in-fuel emulsion to create the secondary atomisation effect that improves combustion
  • No moving parts
  • Designed for reliability and easy maintenance
  • Produces emulsified fuel on demand for immediate consumption. Hence, no storage of emulsified fuel is needed. (Storage of emulsified fuel may cause biological corrosion due to the growth of biological microbes)
  • Re-emulsifies re-circulated water and fuel to the same optimal emulsified fuel
  • Can be scaled to produce optimal emulsified fuel for ships of all sizes.