• RAGADIA SADIQ YAQUB

The gradual reduction of the petroleum reserves and increase of pollutant emissions have demanded the development of alternative and renewable energy sources which can help to reduce the current oil dependency in the field of Internal combustion engine(ICE). Utilization of natural gas in I.C. engine is an option to overcome some problems and various renewable energy sources are also available to overcome this energy crisis. Biogas is a well established renewable and environment friendly fuel for rural energy needs. The main problem that all researchers and manufacturers are facing now is the low power output of Biogas engine due to low density, low volumetric efficiency, low flame speed and absence of fuel evaporation. Even Biogas engine require compact and turbulent combustion chamber for effective combustion of the charge inside the combustion chamber. This fact focuses towards the need for development of a Biogas engine technology which can offer same or better power output with lower specific fuel consumption and emissions with respect to its counterparts i.e. gasoline fueled engines within same volumetric capacity. So, for the development of the Biogas engine technology experiments were performed on a small 100-cc single-cylinder, four stroke spark-ignition engine which was operating on biogas as well as on petrol. The SI engine is converted to Biogas and is experimentally investigated at various combinations of crown geometries to estimate the optimal piston that could develop a compact and turbulent combustion chamber. The study concludes that proper selection of piston geometry reduces the de-rating of biogas fueled SI engine.

Biogas, piston crown geometry, performance, IC engine.

"Experimental investigation of effects of piston crown geometry on performance of Biogas fueled 4 stroke SI engine.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 1, page no.235-243, January-2018, Available :http://www.jetir.org/papers/JETIR1801045.pdf

"Experimental investigation of effects of piston crown geometry on performance of Biogas fueled 4 stroke SI engine.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 1, page no. pp235-243, January-2018, Available at : http://www.jetir.org/papers/JETIR1801045.pdf