Research of powerful and fuel - economic characteristics of diesel engines converted to alternative mixed gas fuel

Abstract

The energy values and indicators of diesel engines converted to alternative mixed gas fuel were studied. Theoretical studies of the conversion of diesel engines to gas engine fuels have been carried out. Formulated methodology and planning of experimental studies of the use of alternative mixed fuel in converted diesel engines. Bench studies were conducted. The diesel engine was converted to run on an alternative gas mixture. The dependence of the effective power N on the frequency of rotation of the crankshaft of the engine n with different engine fuel was determined experimentally. For a comparative evaluation of the performance of the engine on diesel fuel with the corresponding performance of the convertible diesel engine on a propane-butane mixture with additives based on pyrolysis gas in the amount of 5 and 10%, the load characteristics of the engine at fixed crankshaft rotation frequencies were recorded. Before measuring the parameters, the engine was operated at the specified mode for at least 5 minutes for a stable flow of the work process. The results of the measurements were recorded in the test protocol with three repetitions at each engine operating mode. Experimental studies showed that the maximum effective power of the engine when using pure propane-butane instead of diesel fuel increased from 17.1 to 18.1 kW or by 5.2%; the maximum effective power of the engine when using a mixture of 95% propane-butane and 5% pyrolysis gas instead of diesel fuel increased from 17.1 to 17.5 kW or by 2.3%; the maximum effective power of the engine when using a mixture of 90% propane-butane and 10% pyrolysis gas instead of diesel fuel decreased from 17.1 to 16.9 kW or by 1.2%.

Key words: pyrolysis, calorific value, alternative fuels, diesel engine, engine conversion to gas.