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Use of biofuels in a compression-ignition engine : comprehensive technical and economical analysis

Szabados G., Bereczky A.

Journal of KONES

2018

Vol. 25, No. 1

385--393

The assessment of renewable fuels on the basis of the results of internal combustion engine’s tests is not clearly good or not good. Biofuels can be a part of sustainability from energy sources, energy security and energy diversity point of view. But they cannot be assessed better compared to the fossil diesel as for their combustion and air pollution and the engine’s external parameters. Comparison test series has been conducted with three different fuel and their controlled blends. These fuels were fossil diesel, the conventional, standardized biodiesel, and a new type biodiesel, which is the so-called TBK-biodiesel. These tests covered the physicochemical properties of the fuels, the engine external parameters, the combustion parameters and the exhaust emission of an internal combustion compression ignition engine. Furthermore, external costs have been calculated based on the emission results. Physicochemical properties, engine parameters, combustion parameters, exhaust emission and external costs have been observed as parameter groups, which contain many parameters. A complex evaluation could be built with the help of such kind of parameter set. On the basis of the results, it can be established that almost in the most cases the direction of the parameters’ changes is negative. Thus, the evaluation’s centre of gravity has been observed as shifted in the negative direction.