Abstract
Biodiesel is a renewable energy source which is gaining prominence as an alternative fuel over fossil diesel for different applications. Due to their higher viscosity and lower volatility, biodiesels are blended with diesel in various proportions. B20 blends are viable and sustainable solutions in diesel engines with acceptable engine performance as they can replace 20% fossil fuel usage. Biodiesel blends are slightly viscous as compared with diesel and can be used in common rail direct injection (CRDI) engines which provide high pressure injection using an electronic control unit (ECU) with fuel flexibility. In view of this, B20 blends of three biodiesels derived from cashew nutshell (CHNOB (B20)), jackfruit seed (JACKSOB (B20)), and Jamun seed (JAMNSOB (B20)) oils are used in a modified single-cylinder high-pressure-assisted CRDI diesel engine. At a BP of 5.2 kW, for JAMNSOB (B20) operation, BTE, NOx, and PP increased 4.04%, 0.56%, and 5.4%, respectively, and smoke, HC, CO, ID, and CD decreased 5.12%, 6.25%, 2.75%, 5.15%, and 6.25%, respectively, as compared with jackfruit B20 operation.
Highlights
Environmental degradation is one of the major concerns associated with continued usage of fossil fuels in internal combustion (IC) engines
From the extensive literature review on sustained utilization of biodiesel blends, we found that most studies focused on convention mechanical fuel injection systems and adopted a few hundred injection pressures
The objective of the present study is to evaluate the performance of a modified common rail direct injection (CRDI) diesel engine powered with B20 blends of cashew nutshell, Jamun seed, and jackfruit seed oils with diesel
Summary
Environmental degradation is one of the major concerns associated with continued usage of fossil fuels in internal combustion (IC) engines. Compression ignition (CI) engines are highly efficient and rugged but have major disadvantages that include higher smoke and NOx emissions [4,5]. Simultaneous reduction of both these emissions is a major issue and several studies have reported different methods of controlling these emissions [6,7,8,9], which have included fuel modification, optimization of engine configuration, and operating parameters that have an impact on engine combustion characteristics [10,11]. Injecting biodiesel blends with split and multiple injection modes, can further reduce smoke and NOx emissions simultaneously
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