The brake thermal efficiency is reduced at all outputs below
diesel values with water injection due to poor combustion. At high
outputs, the brake thermal efficiency with the emulsion is significantly
above the values with water injection. It is even better than
base diesel operation at full load. In the case of the emulsion the
brake thermal efficiency is below diesel values only at low loads.
At full load, brake thermal efficiency is 30.6% with water injection
where as 32.6% with water–diesel emulsion at 0.4:1 water to diesel
ratio.