Performance and emission study on diesel engine fueled by turpentine oil using various fuel admission techniques

Abstract

The increasing industrialization and modernization of the world led to a steep rise in the consumption and demand for the petroleum-based fuels every year. The present known reserves, supplying fuel today are not capable of withstanding the growth rate of consumption. Hence, it is frightened that they are not going to last long forever. The present investigation uses one such oil called Turpentine (an essential oil obtained from various species of pine tree) in a direct injection (DI) diesel engine as an alternate fuel for diesel oil. The properties of turpentine falls in between the properties of petrol and diesel and few of them are also closer to that of diesel oil. Hence, the present investigation uses three different fuel admission methods such as bi-fuel, dual fuel and sole fuel methods for admitting large fraction of turpentine in the existing diesel engine. The investigation reveals that the bi-fuel method does not require any form of engine modification. However, it replaces only 40% of diesel fuel consumption and librates considerably higher NOx emission than that of standard diesel operation. Dual fuel method of turpentine admission replaces a maximum of 65% diesel fuel consumption and produces considerably lower emissions than that of diesel fuel operation and other methods. However, it requires considerable engine modification. The sole fuel method of turpentine admission offers a maximum and complete diesel replacement than other investigation methods. However, this method requires considerable engine modification and also emits higher NOx. From the investigation of turpentine admission methods it is found that the dual fuel method of turpentine admission stands first and offers maximum diesel replacement with lower emissions. Hence, this method is suggested as the best method for admitting turpentine in the existing diesel engines and this method also provides a large scope for future study and investigation. newline newline newline