Performance and Emissions Characteristics of Algae Oil Methyl Ester with Different Methanol Injection Positions in Dual-Fuel Engine

Fuel mixed with high latent heat of vaporization of methanol lowers the combustion temperature in methanol/diesel combined injection mode engines. At high blending ratios, it effectively reduced NOx emissions, resulting in combustion degradation. The experiment was conducted using AOME20 and various methanol mix amounts. AOME20M15 has a BTE of 30.2% at full load and AOME20M20 has a BTE of 28.2%, whereas diesel and AOME20 have BTEs of 30 and 31%, respectively. Brake-specific fuel consumption of AOME20M10, AOME20M15, and AOME20M15 is 0.2, 0.23, and 0.23 kg/kWh. CO emission for diesel and AOME20 emits 0.26 and 0.24%, respectively. The HC emission also decreased when compared to the diesel. At full-load condition, the NOx emission of AOME20M10 and AOME20M15 emits 1220 and 1120 ppm, respectively, whereas diesel and AOME20 emit 1160 and 1190 ppm, respectively. Smoke emissions decreased as the methanol content of the blend increased. At full load, AOME20M10 and AOME20M15 produce 72 and 76%. Under the same operating conditions, mixing 10–15 percent methanol with AOME20 fuel can reduce NOx emissions.