Abstract
The aim of this work was to study the combustion, performance, and emission characteristics of a 5.5 kW four-stroke single-cylinder water-cooled direct-injection diesel engine operated with blends of biodiesel-like fuel (BLF15, BLF20 & BLF25) obtained from a 50:50 mixture of transesterified waste transformer oil (TWTO) and waste canola oil methyl esters (WCOME) with petroleum diesel. The mixture of the waste oils was named as biodiesel-like fuel (BLF).The engine fuelled with BLF blends was evaluated in terms of combustion, performance, and emission characteristics. FTIR analysis was carried out to know the functional groups in the BLF fuel. The experimental results revealed the shorter ignition delay and marginally higher brake specific fuel consumption (BSFC), brake thermal efficiency (BTE) and exhaust gas temperature (EGT) values for BLF blends as compared to diesel. The hydrocarbon (HC) and carbon monoxide (CO) emissions were decreased by 10.92–31.17% and 3.80–6.32%, respectively, as compared to those of diesel fuel. Smoke opacity was significantly reduced. FTIR analysis has confirmed the presence of saturated alkanes and halide groups in BLF fuel. In comparison to BLF20 and BLF25, the blend BLF15 has shown higher brake thermal efficiency and lower fuel consumption values. The HC, CO, and smoke emissions of BLF15 were found lower than those of petroleum diesel. The fuel blend BLF15 is suggested to be used as an alternative fuel for diesel engines without any engine modification.
Highlights
Global warming has been intensified over the past three decades because of the drastic increase in greenhouse gases (GHG) generated by fossil fuels
Global warming due to fossil fuel emissions, depletion of petroleum product reserves, population growth, and crude oil price hikes has stimulated researchers to search out environmentally-friendly alternative energy resources
The aim of this work was to study the combustion, performance, and emission characteristics of a 5.5 kW four-stroke single-cylinder water-cooled direct-injection diesel engine operated with blends of biodiesel-like fuel (BLF15, BLF20, and BLF25) obtained from a 50:50 mixture of transesterified waste transformer oil (TWTO) and waste canola oil methyl esters (WCOME) with petroleum diesel
Summary
Global warming has been intensified over the past three decades because of the drastic increase in greenhouse gases (GHG) generated by fossil fuels. Growing concerns of environmental contamination due to excessive use of fossil fuels has stimulated the scientists of the world to search for more environmentally-friendly, feasible, and renewable fuels. In this connection bio-fuels, like biodiesel, have received a remarkable attention to be used as alternatives for diesel engines [1,2]. Biodiesels derived from waste vegetable oils are economically more feasible to be used as a replacement for diesel fuel. They emit less pollutant and GHG emissions
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