Author/Authors :
Galle، نويسنده , , Jonas and Verhelst، نويسنده , , Sebastian and Sierens، نويسنده , , Roger and Goyos، نويسنده , , Leonardo and Castaneda، نويسنده , , Rafaël and Verhaege، نويسنده , , Marc and Vervaeke، نويسنده , , Lieven and Bastiaen، نويسنده , , Marc، نويسنده ,
Abstract :
The residue of a fatty acid distillation was used as a diesel fuel in a medium speed diesel engine. This bio-oil was heated to 110 °C to decrease the viscosity to 8 mPa s. The injectors working with the bio-oil failed prematurely with operation times ranging from 50 to 1500 h. The injectors and the fuel were investigated in order to know the reasons of the failure and to improve the operation of the engine. The investigation revealed different causes, including plastic deformation and clogging of the injector’s passages, as well as micro cracks, erosion and cavitation damage. The failed injectors were compared with non affected ones from the same engine and injectors from fossil diesel fuelled engines. It was found that the chemical and physical composition of the fuel enforced the failure of the injectors.
Keywords :
Cavitation , biofuel , Marine diesel engine , Clogging , Injector failure , Fatty acid distillation residue
