Effect of exhaust gas recirculation and constant pre-heated air temperature on the homogeneous charge compression ignition combustion engine with diesel and wppo ۲۰ blend

This article describes an experimental study on fueling the port fuel injection homogeneous charge compression ignition (PFI-HCCI) combustion engine with plastic oil that is generated from waste plastics through the pyrolysis method. This study tested different exhaust gas recirculation (EGR) levels of ۰%, ۵%, ۱۰%, and ۱۵% using a modified PFI-HCCI computerised ۴-stroke, single-cylinder, water-cooled, direct injection Kirloskar diesel engine connected to an eddy current dynamometer. Furthermore, an engine running at ۱۵۰۰ rpm and a constant pre heated air temperature (PHAT) of ۱۴۰°C were assessed. In this experiment, fuel, ۲۰% biodiesel waste plastic pyrolysis oil (WPPO), and continuous PHAT ۱۴۰°C are used. The testing results show that the cylinder peak pressure and heat release rate for WPPO ۲۰ with ۱۵% EGR were attained at ۳۹.۷۰% and ۱۵.۰۹%, respectively. Additionally, port fuel injection with PHAT and WPPO ۲۰% without EGR is reported to have a ۴۵% higher brake thermal efficiency at full load than PFI-HCCI Diesel (D۱۰۰). But when employed at full load with ۱۵% EGR, WPPO ۲۰ blend also reduced smoke opacity by ۳۰.۷۴% and Oxides of Nitrogen (NOx) emission by ۵۲.۱۷%. On the other hand, compared to the PFI-HCCI (D۱۰۰), there are higher emissions of carbon monoxide (CO) (۲۲.۰۷%) and unburnt hydro carbon (UHC) (۵۴.۱۴%) with ۱۵% EGR. Consequently, WPPO can be used to the PFI-HCCI engine.

Keywords:

Pre-heated air temperature , Waste plastic pyrolysis oil , exhaust gas recirculation , Port fuel injection , emissions