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MBDO SPACER Fuel and Water Emulsification
[ ETC > Organization > MBDO > Emulsification ]

Multi-DS™

DOES2™

Concentrator

Emulsification

On-Board Fuel Emulsification System for Large Displacement Diesel Engines

This technology has been developed to produce an emulsified fuel of diesel + water, without the use of a surfactant. The technology will provide an emulsified diesel fuel to the engine�s injector pump, with a water content ranging from 0 to 40% that can be controlled as required by the operator. The emulsification of the fuel is created mechanically in a fuel-mixing chamber. The diesel fuel (including Marine diesel oil or Heavy fuel oil) is pumped to the fuel-mixing chamber from the fuel tank where water is added to the fuel through a probe controlled by a microprocessor with controlling software. Downstream of where the water is added to the fuel, application of a mechanical agitation technique results in the breakup of the water into small droplets that are dispersed throughout the diesel fuel, representing an emulsion. The fuel emulsion then leaves the fuel-mixing chamber and enters the injection pump where it is directed to the individual combustion chamber fuel injectors.

If the operator has a requirement for full engine power, he can quickly terminate the supply of water to the mixing chamber. The 100% diesel fuel from the tank is then fed directly to the injector pump allowing full power to be restored on demand. This feature is very attractive in situations where full power is needed on short notice where safety or other increased power requirements arise from time to time.

In many cases, the approximately 90% of the fuel flow to the injectors that doesn�t go into the combustion chambers undergoes a process of demulsification, again separating the water from the fuel. The separated water and diesel fuel are then returned to their respective tanks for reuse in the emulsification process.

This technology will result in the same oxides of nitrogen reductions as measured with the emulsifications based on the use of a surfactant, but it has the additional flexibility to allow the engine to achieve full power in critical situations. With the use of surfactants, the engine will always have a power loss penalty resulting from the addition of the water to the fuel mixture, as water has no potential for thermal energy. In addition, in cold temperature operations, the water content is a concern for fuel flow. In these applications the storage of the emulsified fuel (diesel + water +surfactant) is not an option.

This technology can also be applied to a wide variety of smaller displacement diesel engines.


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