Influence of Compression Ratio on the Performance and Emission Characteristics of Annona Methyl Ester Operated DI Diesel Engine

Abstract

This study aims to find the optimum performance and emission characteristics of single cylinder variable compression ratio (VCR) engine with different blends of Annona methyl ester (AME) as fuel. The performance parameters such as specific fuel consumption (SFC), brake thermal efficiency (BTE), and emission levels of HC, CO, Smoke, and NO x were compared with the diesel fuel. It is found that, at compression ratio of 17 : 1 for A20 blended fuel (20% AME + 80% Diesel) shows better performance and lower emission level which is very close to neat diesel fuel. The engine was operated with different values of compression ratio (15, 16, and 17) to find out best possible combination for operating engine with blends of AME. It is also found that the increase of compression ratio increases the BTE and reduces SFC and has lower emission without any engine in design modifications.

Combustion exhaust release impact, diesel engine performance, and optimization studies of green diesel-petrodiesel blend in a high compression ratio direct-injection compression-ignition engine

“…It could be observed that the higher the compression ratio the more improved engine performance than the result obtained previously in the literature using lower CR values. 8,62,64,65 The result obtained in this study recorded the highest brake thermal efficiency. Therefore, high compression ratio engines are desirable because it allows an engine to extract more energy from a given mass of air/fuel mixture due to its higher thermal efficiency and equally allows the same temperature to be reached with less fuel while given a longer expansion cycle.…”

Effect of Zinc Oxide Nano-Additives and Soybean Biodiesel at Varying Loads and Compression Ratios on VCR Diesel Engine Characteristics

“…An increase in the compression ratio leads to better air-to-fuel mixing and increases the temperature during the compression stroke. In addition, an increase in the compression ratio reduces the dilution of the fuel charge by residual gases [61]. The SBME25 fuel blend produces higher smoke emissions due to lower calorific value and heat release rate.…”

“…The compression ratio of 21.5 illustrated a higher HRR due to higher burning velocity of fuel blends; the HRR values for 25, 50, and 75 ppm of ZnO in SBME25 were 61.844, 70.44, and 65.854 J/ • CA, respectively. The addition of zinc oxide nanoparticles in the SBME25 biodiesel blend increases the HRR at both compression ratios due to enhancement in oxygen content during combustion and atomization of fuel particles [33,56,[60][61][62][63][64][65]. Table 7 illustrates the final results analysis of SBME25 and nanofuel blends.…”

Effect of Injector Opening Pressure on Dairy Scum Biodiesel Operated Diesel Engine

“…[40]. 20% Annona biodiesel run engine with increased CR and IT had resulted enhanced BTE and reduced BSFC, CO and HC emissions [41]. The fast combustion is resulted when the IOP is increased and there is serious reduction of soot at part and low engine speeds but there will be considerable increment in NOx it can be controlled by EGR [42].…”