Enhanced Efficiency of a Diesel Engine for Biogas by Using a Two-Plain Venturi

This paper is concerned with modification and improvement of a diesel engine to be fueled by biogas. An air pump is employed to compress the mixture of air and biogas into a single cylinder diesel engine. The crankshafts of both were modified such that two equal size sprockets could be fastened to them. Biogas is supplied to the engine via a venturi. In this work, comparative efficiency of the engine with the use of one- and two-plain venturies is studied. Experimental results are conducted and it is shown that using the two-plain venturi leads to higher engine system performance. It can increase the vacuum head of the system for 10% compared to the baseline one-plain venturi.