Abstract:
Spreading concerns over problems related to energy, economy and environment have prompted a
tremendous burst of research activities in the field of combustion of both conventional and
alternative fuels. Among them, natural gas and biogas are the potential substitution to
conventional fuels in our country.
Natural gas is cheap in Bangladesh and biogas is renewable in nature. Energy density of
natural gas premixture is comparable to those of the diesel values; however energy density of
biogas premixture is low as compared to diesel fuel. These gaseous fuels can be introduced in
stationary diesel engine by fumigation method with minor physical modification of the engine.
In the present study, performance studies are carried out in a 4stroke 4-cylinder diesel
engine using natural gas and biogas as the main source of energy. A fixed amount of diesel is
used as a pilot fuel to ignite the mixture. Synthetic biogas is prepared by mixing ClI< from main
supply and CO2 from the cylinder. Performance studies are carried out at four different engine
speeds at different loading conditions. Various performance parameters are analyzed and
reported. Engine performances are found to be not deviating from its diesel performance when
these fuels are used.
