Biodiesel Features in the Railway Transport

Abstract

To calculate enterprise expenses on fuel, the above tax should be taken into account. Consumption and the amount of RME, compared to pure diesel oil consumption when 20 % of RME is added, fuel consumption grows by about 4 % (Lingaitis and Pukalskas, 2008), compared to pure diesel oil consumption while the use of 30 % of RME in the mixture with diesel oil increases fuel consumption by about 2.5 %. A further increase in the percentage of RME in the mixture leads to a further increase in fuel consumption. When smaller RME amounts are used, the expenses are increased insignificantly. A mathematical model allowing fuel costs to be determined for a locomotive engine using a certain amount of biological diesel oil was developed referring to the methods of economic effect calculation described in the present paper. The relationship between the proportion of hydrocarbons (CxHy) in the exhaust emissions and the engine load is expressed by regression equations for all types of mixtures. CxHy emission is growing for all the mixtures except those containing 20 and 30 % of RME (Lingaitis and Pukalskas, 2008). The maximum is reached at 50 % Pmax, with further decrease of emission. The smallest effect of the engine load on CxHy emission can be observed, when pure diesel oil is used. For the mixture of 10 % RME and diesel oil, CxHy emission is the lowest, being comparable with that of pure diesel oil. When the total amount of contaminants is considered without PM emission, the use of biodiesel with 30-40 % RME added is most rational from the ecological perspective. According to the law of the Republic of Lithuania on environment pollution taxes (Lingaitis and Pukalskas, 2007), all physical and juridical persons engaged in commercial activities and using mobile equipment causing environment pollution should pay the environmental tax depending on the type of transport facilities used. The annual fixed tax of 7.53 EUR per one ton of burnt fuel should be used for rail transport in the period from 2005 to 2009.