Numerical Investigation about Diesel Engine Powered by Waste Plastic Oil Blends Under Different Load and Engine Speed

Abstract

The current study's objective is to use Diesel-RK simulation software to numerically assess the consequences of employing waste plastic oil blends on the thermal features of diesel engines. Each autonomous zone's governing equations are solved using the multi-zone combustion model. Three distinct volumetric blends were used to analyze the engine's characteristics of waste plastic oil (10 %, 20%, and 30 %) as a comparison to the standard diesel case with full and variable load and engine speeds. The data collected showed a slight decrease in the cylinder pressure for all blends at high engine speed compared to lower engine speed. The maximum value of BTE and heat release rate and lower BSFC accrue at 1500-2000 rpm. On the emissions side, a significant increase in the Bosch Smoke Number (BSN) was observed: 51.96%, 34.58%, 12.30%, and 0.012% at 1000 rpm, 1500 rpm, 2000 rpm, and 2500 rpm, respectively, compared to 3000 rpm for the 30% WPO at full load. A higher biodiesel content (30% WPO) resulted in a slight decrease in NOx emissions compared to diesel at 3000 rpm. The findings suggest that 3000 rpm is recommended for fewer emissions and 1500-2000 rpm for higher BTE and less BSFC; the results are identical with other studies.