Abstract
The theoretical model of main performance indicators of diesel locomotive engines using natural gas is exposed. According to the model, the heat released during the combustion of mixed fuel can be determined. The composition of natural gas, which is indicated in the passport when refueling a diesel locomotive, is taken into account. Thus, it became possible to adjust the program of regulating the fuel supply control system according to the operating modes of a diesel locomotive engine by introducing a composition coefficient. The results of analyzing the variation range in the net calorific value of gas during the conversion of diesel locomotives for using the natural gas as a motor fuel are presented. As exposed, the variation range in the net calorific value at various examined fields varies up to 32.4%. The so-called net calorific value of diesel fuel and natural gas combustion is suggested to be considered for operating diesel locomotive engines with liquid gas fuel, in addition to atmospheric conditions.
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