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Research Papers: Fuel Combustion

Real-Time Analysis of Engine Power, Thermal Efficiency, and Emission Characteristics Using Refined and Transesterified Waste Vegetable Oil

[+] Author and Article Information
Greg M. Cubio

Agricultural Engineering Department,
Xavier University-Ateneo De Cagayan
Corrales Avenue,
Cagayan De Oro City 9000, Philippines
e-mail: gcubio@xu.edu.ph

Sergio C. Capareda

Biological and Agricultural Engineering Department,
Texas A&M University,
College Station, TX 77840
e-mail: scapareda@tamu.edu

Feliciano B. Alagao

Mechanical Engineering Department,
Mindanao State University-Iligan Institute of Technology,
A. Bonifacio Avenue, Tibanga,
Iligan City 9200, Philippines
e-mail: fbalagao@yahoo.com

1Corresponding author.

2Fulbright Visiting Researcher at Texas A&M University.

Contributed by the Internal Combustion Engine Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received April 23, 2013; final manuscript received October 14, 2013; published online March 21, 2014. Assoc. Editor: Kevin M. Lyons.

J. Energy Resour. Technol 136(3), 032201 (Mar 21, 2014) (10 pages) Paper No: JERT-13-1137; doi: 10.1115/1.4025844 History: Received April 23, 2013; Revised October 14, 2013; Accepted October 16, 2013

The study aims to investigate the real-time engine performance in terms of brake power, thermal efficiency and emission characteristics of a diesel engine. Waste vegetable oil samples were collected from several sources, mixed, and refined before transesterification. Test fuels include ultralow sulfur diesel and seven waste cooking oil biodiesel blends. Real-time data acquisition of engine performance was implemented using labview program while following the society of automotive engineers (SAE) power test code. Results showed that acid number was reduced by 99% after refining. NOx has reduced by 33% while thermal efficiency increased by 7.5% when using waste vegetable oil biodiesel.

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Figures

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Fig. 1

Refining processes of waste vegetable oil

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Fig. 2

Process flow diagram of the study

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Fig. 3

Experimental set-up of the 80-hp diesel engine coupled to a 450-hp dynamometer

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Fig. 4

Data acquisition set-up for engine performance and exhaust emissions

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Fig. 5

Enerac emission analyzer at the exhaust port of the engine

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Fig. 6

WVO color and appearance during refining

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Fig. 7

Losses obtained during WVO refining processes

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Fig. 8

Physical appearance of WVO biodiesel and its blends

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Fig. 9

Relationships of WVO biodiesel blends and some fuel properties

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Fig. 10

Performance curves of the 60 kW diesel engine using ULSD (B0) and WVO biodiesel (B100)

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Fig. 11

Brake specific fuel consumption of B0 and WVO-B100

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Fig. 12

Exhaust emissions at peak brake power using WVO biodiesel

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Fig. 13

Oxygen and NO concentrations of B100 and B0

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Fig. 14

NOx emission behavior of B0 and B100 at varying torque

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Fig. 15

SOx and THC peak emissions

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Fig. 16

CO, CO2, and NOx peak emissions

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