Abstract
Abstract A comparative analysis of performance of Diesel engines fuelled by diesel oil, methyl ester of rapeseed oil and raw rapeseed oil was performed. The analysis of external characteristics of engines powered by various fuel types was accepted for an assessment. Engine performance rates were analysed while attention was paid to power courses, moment, unit fuel consumption and hour fuel consumption, exhaust fumes temperature and exhaust smoke. Operation effectiveness of engines was assessed when they were fed with various fuel types and optimal proportions of fuel mixtures were indicated. Environmental aspects of powering the engines with traditional fuels and crop-based fuels were analysed. The total CO2 emission in the entire process of manufacturing and combustion of fuels was accepted as a criterion. A simplified economic analysis was performed in the aspect of the underlying purpose of using crop-based fuels for propulsion of piston engines. Conclusions and recommendations that indicate directions of development concerning the analysed issue were prepared.
Highlights
Engine feed with crop-based fuels is a complex issue that cannot be interpreted objectively
The objective of the paper is an attempt to compare parameters of the engine fuelled with diesel oil, rapeseed oil and rapeseed oil ester together with the assessment of environmental effectiveness measured with carbon dioxide emission and with economic prerequisites measured with a price of mentioned fuels and their properties that influence the size of consumption
The presented data show that the total emission that covers the entire process of manufacturing of compared fuels i.e., esters from rapeseed and diesel oil from crude oil and measured with the emission level from cars is much higher in case of crop-based fuels
Summary
Engine feed with crop-based fuels is a complex issue that cannot be interpreted objectively. It is advisable to apply a complex approach to the problem with the use of a measurement of performance rates (Baczewski and Kałdoński, 2005). Environmental, and economic parameters were such rates Such a multi-layer analysis enables to objectively assess the investigated issue. Besides technical aspects and constructional solutions, including specificity of the national economy of a country in the aspect of operation costs, excess in crop production and power autonomy measured with diversification of power resources, is of key meaning for assessment of advisability of biofuels application. An alternative use of biofuels for feeding piston engines should be analysed according to basic criteria: economic, environmental and a technical one.
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