Abstract
ABSTRACT In this experimental study, the performance, combustion and emission of a diesel engine both in pure diesel mode (PDM) and in dual fuel mode (DFM) have been assessed and compared. The biogas flow rates (BFR) at various loads have been modulated in a manner to lower the biogas consumption at lower loads and increase the consumption at higher loads. The investigation has been carried out without and with preheating of the intake charge. The objective behind the modulation of BFR and intake charge preheating is to improve the diesel engine performance in DFM from part to higher loads. In this study with preheating, there is 10% increment of brake thermal efficiency (BTE) at 100% load in comparison to the one without preheating; while there is a reduction of 36.7% carbon monoxide (CO), 26.5% unburnt hydrocarbon (UHC) and 79.4% nitrogen oxides (NOx) at the same load.
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