Effect of diethyl ether and ethanol as an oxygenated additive on Calophyllum inophyllum biodiesel in CI engine
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Effect of diethyl ether and ethanol as an oxygenated additive on Calophyllum inophyllum biodiesel in CI engine Ayyasamy Tamilvanan 1 & Kulendran Balamurugan 2 & Bragadeshwaran Ashok 3 & Pandiaraj Selvakumar 1 & Subbaiyan Dhamotharan 1 & Moorthy Bharathiraja 4 & Viswanathan Karthickeyan 5 Received: 5 April 2020 / Accepted: 24 August 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The present experimental investigation is conducted to examine the working characteristics of compression ignition (CI) engine using oxygenated additives such as diethyl ether and ethanol to the blends of Calophyllum inophyllum biodiesel. Experiments are conducted on a water-cooled single-cylinder constant speed DI (direct injection) diesel engine under same operating circumstances. The results indicates that an enhancement of brake thermal efficiency is up to 3.7% and 6.2% with an addition of ethanol and DEE additive in biodiesel blended fuels respectively at maximum load condition. This is attributable to the existence of higher oxygen value and volatile nature of the additives. The combustion characteristics like in-cylinder pressure and net heat release rate of DEE blended fuels are 1.1–5.2% and 0.4–2.7% higher than other blends respectively. This is mainly due to higher cetane number and high volatile nature of DEE. This also results in higher NOX emissions. But 2–9% drop in nitrous oxide emission is noticed for biodiesel with ethanol blends compared to all other blends. This is as a result of superior latent heat of vaporization and lesser cetane number of ethanol which results in lower cylinder pressure about 0.4–2.6% and this end up with more unburned HC and CO emissions. Energy and exergy studies help to analyze the result of ethanol and DEE additive along with blends of biodiesel. The exergy efficiencies of DEE blended fuels enhance up to 2.3–6% compared to other blends at all load conditions. This is attributable to the superior combustion characteristics of DEE. Keywords Biodiesel (Calophyllum inophyllum) . Ethanol . Diethyl ether . Performance . Combustion . Emission . Exergy
Statement of novelty CI engine output characteristics are improved by biodiesel from Calophyllum inophyllum biomass along with oxygenated additive such as diethyl ether and ethanol. Responsible Editor: Philippe Garrigues * Bragadeshwaran Ashok [email protected] 1
Department of Mechanical Engineering, Kongu Engineering College, Tamilnadu 638060, India
2
Department of Mechanical Engineering, IRTT, Tamilnadu 638316, India
3
School of Mechanical Engineering, Vellore Institute of Technology, Vellore 632014, India
4
Department of Automobile Engineering, Bannari Amman Institute of Technology, Tamilnadu 638060, India
5
Department of Mechanical Engineering, Sri Krishna College of Engineering and Technology, Coimbatore, India
Abbreviations BD Biodiesel blends BDD Biodiesel + diesel + diethyl ether BDE Biodiesel + diesel + ethanol CIME Calophyllum inophyllum methyl ester BTE Brake thermal efficienc
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