An experimental investigation to study the performance and emission characteristics of waste plastic oil fuelled DI diesel engine

Abstract

The world at present is confronted with the twin crisis of fossil fuel depletion and environmental degradation. Increase in energy demand, stringent emission norms and depletion of oil resources have led the researchers to find alternative fuels for internal combustion engines. Research work is still in progress in finding out other alternative fuels mainly derived from renewable or from wastes. In this context, waste plastic oil is considered an alternative fuel since it has properties closer to that of petroleum based fuels. Waste plastic also pose a very serious environment challenge because of their disposal problems all over the world. Plastics have now become indispensable materials in the modern world and application in the industrial field is continually increasing. In the present work, experimental investigations have been carried out on using waste plastic oil as an alternative fuel for diesel. The present work mainly focusses on comparing the different methods to improve the performance of a neat waste plastic oil (WPO) fuelled compression ignition engine. A single cylinder, four stroke air cooled constant speed DI diesel engine with a rated output of 4.4 kW at 1500 rpm was used for the experimental work. Investigations include the study of combustion, performance and emission characteristics of diesel engine fuelled with Waste plastic oil (WPO) Diesel Fuel (DF) blends and distilled waste plastic oil (DWPO) as fuels. In the fifth technique, neat DWPO was used at different retarded injection timing with optimised EGR flow. In the sixth technique, neat DWPO was used at different nozzle opening pressure with optimised retarded injection timing and EGR. Further, improvements in brake thermal efficiency with a significant reduction in over all emissions are noticed. EGR is effective in controlling the NOX emissions significantly. By using nozzle opening pressure, shows an improvement in performance with significant reduction in emissions. newline newline newline