Experimental investigation of effect of ethanol and biodiesel on combustion behavior and emission characteristics of direct injection diesel engine

Name: Wai, Phyo

LCSH: Diesel fuels

LCSH: Diesel motor

LCSH: Diesel motor -- Combustion

LCSH: Ethanol as fuel

LCSH: Ethanol

Abstract: Fossil fuel shortage and greenhouse gas emissions have forced to increase research efforts on liquid renewable biofuels like bioethanol and biodiesel as partial replacement of diesel fuel. Moreover, the blending of three fuels (diesel, biodiesel and ethanol) referred as ternary blends are also popular due to the compensatory effects of one to another and its more renewable portion in the blend. Therefore, this work aims to study the impact of biofuels (biodiesel and ethanol) over the combustion, emissions, and thermal efficiency of diesel engine.Ten different fuel blends are tested on a common rail direct injection diesel engine coupled with the eddy current dynamometer. The tested engine is a four- cylinder, three-liter direct injection diesel engine. The engine was not modified for the experiment. The tested fuel blends are BIO (10%vol biodiesel with 90%vol diesel), B20 (20%vol biodiesel with 80%vol diesel), B100 (100% biodiesel), B10E5 (5%wt ethanol with 95%wt BIO), B10E10 (10%wt ethanol with 90%wt BIO), B20E5 (5%wt ethanol with 95%wt B20), B20E10 (10%wt ethanol with 90%wt B20), B20E20 (20%wt ethanol with 80%wt B20), B100E5 (5%wt ethanol with 95%wt B100) and B100E10 (10%wt ethanol with 90%wt B100). The experiment was performed under three engine speeds of 1000 rpm, 1500 rpm, and 2000 rpm corresponding with four constant engine torques of 56 Nm, 84 Nm,112Nm, and 140 Nm. The findings demonstrate that the premixed combustion pressure and heat release rate peaks of ethanol-biodiesel-diesel ternary blended fuels are higher. The cumulative heat release of ethanol blended fuels is also higher for ethanol blended fuels despite of the shorter combustion duration. The fuel consumption increased with the ethanol and biodiesel portion in the blended fuels while there were no losses of brake thermal efficiency. The air fuel equivalent ratio increased with ethanol and biodiesel portion in blends. The exhaust temperatures of based fuels are higher than that of blended fuels. It’s clearly observed that the particle emission could be reduced while nitrogen oxides emission increased with the ethanol and biodiesel percent increased. Moreover, when ethanol is added to the diesel fuel, the emitted soot particles are easy to oxidize, and the agglomerate size is smaller because of the increased oxygen availability in the exhaust

King Mongkut's Institute of Technology Ladkrabang. Central Library

Address: BANGKOK

Email: Lifelong@kmitl.ac.th

Name: Preechar Karin

Role: Thesis Advisor

Email : preechar.ka@kmitl.ac.th

Name: Kosaka, Hidenori

Role: Thesis Co-Advisor

Name: Nuwong Chollacoop

Role: Thesis Co-Advisor

Created: 2023

Modified: 2024-07-03

Issued: 2024-07-03

eng

DegreeName: Master of Engineering

Level: Master's Degree

Descipline: Automotive and Advanced Transportation Engineering

Grantor: King Mongkut's Institute of Technology Ladkrabang

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