Emulsified fuel in simple terms means the addition of water to fuel oil in such a way that small particles of water are formed in the fuel oil to produce a stable water‐in‐fuel emulsion. The main purpose of diluting fuel oil with small quantities of water is to improve the combustion efficiency by achieving a better heat release rate and to reduce NOx emissions by cooling the combustion.
Solutions for savings costs and compliance with emission regulations
IMPROVED FUEL EFFICIENCY
The BOS Emulsified Fuel System improves the combustion efficiency by producing stable water-in-fuel emulsions to improve injector fuel atomization. Smaller fuel droplets will achieve better fuel-air mixture as more fuel-air surface will be available for combustion. Therefore, the key to achieving better combustion is to create a secondary atomization effect by adding water into the fuel. The secondary atomization effect creates even smaller fuel droplets after injection.
In addition to the measured fuel savings of between 2 and 5%, firm evidence of better combustion has also been recorded in the form of the increased heat release rate.
REDUCED NOx EMISSIONS
The system also reduces NOx emissions by lowering the combustion temperatures. It has been established that 1% of water reduces NOx by about 1%. The system can reduce NOx emissions by up to 20%, thereby meeting the TIER II requirement.
As the BOS EFS can reduce NOx by up to 20%, it can complement Selective Catalytic Reduction (SCR) technology. By installing an EFS, the size of the SCR unit can be reduced by 20%, which will reduce the CAPEX and OPEX associated with the SCR by 20%.