Comparative performance evaluation of a diesel engine run on diesel and biodiesel produced from coconut oil

N.A Musa,S.A Yaman,G.M Teran

doi:10.4314/jasem.v23i4.18

Abstract

Using renewable alternative fuel such as biodiesel in the diesel engines has long been advocated for. The aim of the study was to experimentally investigate and compare the performance in terms of fuel consumption rate, brake power, mechanical efficiency of a diesel engine individually fuelled by sole coconut oil biodiesel and diesel. All the tests were conducted using a test rig at different engine loads of 0, 25, 50, 75 and 100%. Results of the test revealed that fuel consumption rate of the engine when it was fuelled by coconut oil biodiesel were 3.651, 4.058, 4.465, 3.113 and 1.76litres/h and were 2, 1.55, 1.10, 1.06 and 1.02litres/h when the engine was fuelled by sole diesel at the respective aforementioned engine loads. The brake powers of the engine when biodiesel was used were found to be lower than when diesel was used at each load The mechanical efficiencies of the engine when biodiesel was used were found to be slightly lower at each load than when diesel was used. The fuel consumption rates of the diesel engine when fuelled individually with sole biodiesel and sole diesel were found to vary with load, brake power and mechanical efficiency of the engine. Brake power was also found to vary with load when the engine was fuelled individually with sole biodiesel and sole diesel.Keywords: Diesel engine, diesel, biodiesel, fuel consumption, performance

Highlights

The choice of diesel engines as power sources in preference to gasoline engines is because, gasoline engines consume so much fuel with high exhaust emissions like carbon dioxide and un combusted hydrocarbon (Adaileh and AlQdah, 2012).Most countries meet their energy needs with fossil fuels such as petroleumbut as the population increases, the demand of the use of fossil fuel increases and this leads to imminent exhaustion of the fossil fuel sources (Puneet and Sharma, 2015)
The variation of fuel consumption rate of the engine when it was run with biodiesel and diesel with engine load is shown in figure 1.It can be seen from figure 1 that when the engine was fuelled with biodiesel and made to run, the fuel consumption rate initially increased with increase in engine load and decreased sharply with increase in engine load
As can be seen from figure 2 that the fuel consumption rate of the biodiesel fuelled engine initially increased and later decreased with increase in brake power. It can been seen from figure 2, that fuel consumption rate decreased with increase in brake power when the engine was fuelled with diesel

Summary

Introduction

The choice of diesel engines as power sources in preference to gasoline engines is because, gasoline engines consume so much fuel with high exhaust emissions like carbon dioxide and un combusted hydrocarbon (Adaileh and AlQdah, 2012).Most countries meet their energy needs with fossil fuels such as petroleumbut as the population increases, the demand of the use of fossil fuel increases and this leads to imminent exhaustion of the fossil fuel sources (Puneet and Sharma, 2015). The need to know biodiesel performance benefits is very imperative This need has necessitated some researchers to carry out comparative performance analysis of diesel engine fuelled with biodiesel produced from different sources and diesel by Naik and Balakrishna (2019),Jindal et al, (2010),Ashutosh et al, (2013), Nidal and Khaled (2015), Ghosh and Dutta (2012),Mamilla et al,(2013), Hao et al,(2016), Al-dawody and AlFarhany (2018), Kolhe et al, (2014), Dharmadhikari et al,(2012),Kumar and Sharma (2016), Ramakrishnan et al, (2018), Hevandro et al,(2017),Fallahipanah et al,(2011), Ahmed et al, (2016),Maharana and Chnadra (2015), Hurdogan (2016),Harinathareddy et al,(2013), Elango and Senthilkumar (2011), Mamilla (2013), Musa et al,(2016a). This study focuses on fuel consumption rate and its relation to engine load, brake power and mechanical efficiency of the engine. On brake power in relation to engine load using sole coconut oil biodiesel in comparison to sole diesel in fuelling diesel engine

Objectives

Methods

Results

Conclusion