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Waste and Biomass Valorization

, Volume 10, Issue 7, pp 2001–2014 | Cite as

Influence of Exhaust Gas Recirculation on Combustion and Emission Characteristics of Diesel Engine Fuelled with 100% Waste Cooking Oil Methyl Ester

  • K. Nanthagopal
  • R. Thundil Karuppa Raj
  • B. AshokEmail author
  • T. Elango
  • S. V. Saravanan
Original Paper

Abstract

The present research work deals with the application of 30% exhaust gas recirculation (EGR) in a direct injection compression ignition engine fuelled with 100% waste cooking oil methyl ester and conventional diesel. In the first phase of this research work, the performance, emission and combustion characteristics of diesel engine are investigated with the supply of fresh air–fuel mixture for conventional diesel and waste cooking oil methyl ester as fuels and in the second phase the fresh air–fuel mixture is blended with 30% exhaust gas. The study reveals that the 30% EGR addition decreased the brake thermal efficiency by 8 and 18% for conventional diesel and 100% waste cooking oil methyl ester as fuels. Nitrogen oxides emission is reduced to a great extent by 47.5% for diesel fuel and 58.9% for biodiesel fuel at full load condition. Further, the 30% EGR has substantially increased the carbon monoxide and unburnt hydrocarbon emissions for both the fuels at maximum brake mean effective pressure. In addition similar pattern of in-cylinder gas pressure, heat release rate, cumulative heat rate have been observed for fresh air fuel mixture and 30% EGR under various loading conditions.

Keywords

Transesterification Exhaust gas recirculation Waste cooking oil methyl ester Emission Performance Combustion 

Abbreviations

bTDC

Before top dead center

BSFC

Brake specific fuel consumption

BSEC

Brake specific energy consumption

BMEP

Brake mean effective pressure

BTE

Brake thermal efficiency

DI

Direct injection

FFA

Free fatty acid

EGR

Exhaust gas recirculation

CO

Carbon monoxide

CO2

Carbon dioxide

NOx

Oxides of nitrogen

UBHC

Unburned hydrocarbon

WCME

Waste cooking oil methyl ester

WCO

Waste cooking oil

WCME100

100% Waste cooking oil methyl ester

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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  • K. Nanthagopal
    • 1
  • R. Thundil Karuppa Raj
    • 1
  • B. Ashok
    • 1
    Email author
  • T. Elango
    • 2
  • S. V. Saravanan
    • 3
  1. 1.School of Mechanical EngineeringVIT UniversityVelloreIndia
  2. 2.Mahendra Institute of TechnologyNamakkal DistrictIndia
  3. 3.Asian College of Engineering and TechnologyCoimbatoreIndia

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