Combustion, performance and emissions of a diesel power generator with direct injection of B7 and port injection of ethanol

de Oliveira, Alex and de Morais, Andre Marcelino and Valente, Osmana Souza and Sodre, Jose Ricardo (2016) Combustion, performance and emissions of a diesel power generator with direct injection of B7 and port injection of ethanol. Journal of the Brazilian Society of Mechanical Sciences and Engineering, 39 (4). pp. 1087-1096. ISSN 1678-5878

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Abstract

This work investigates a diesel engine operating
with diesel oil containing 7% biodiesel (B7) and hydrous
ethanol with concentrations varying from 5 to 30%. The
experiments were conducted in a 49-kW diesel power generator, equipped with an electronic ethanol injection unit
installed in the intake manifold and without any modifications in the diesel oil injection system. The results showed a decrease of in-cylinder pressure and net heat release rate with the use of ethanol at low loads and an increase at high loads, in comparison with B7. Increasing ethanol injection caused increased ignition delay and decreased combustion duration. Fuel conversion efficiency was raised up to 13% with the use of ethanol. The use of 30% ethanol in the fuel caused a reduction of carbon dioxide (CO2) emissions up to 12% and nitric oxide up to 53%. Carbon monoxide, total hydrocarbons and oxides of nitrogen (NOX) emissions increased with ethanol addition. The replacement of 20% of diesel fuel by ethanol showed the lowest penalties on NOX emissions.

Item Type: Article
Uncontrolled Keywords: Ethanol · Diesel engine · Combustion · Emissions · Power generation
Subjects: H800 Chemical, Process and Energy Engineering
Divisions: Faculty of Computing, Engineering and the Built Environment
Faculty of Computing, Engineering and the Built Environment > School of Engineering and the Built Environment
Faculty of Computing, Engineering and the Built Environment > School of Engineering and the Built Environment > Advanced Systems Engineering
UoA Collections > UoA15: General Engineering
Depositing User: $ Ian McDonald
Date Deposited: 04 Jan 2017 11:12
Last Modified: 21 Sep 2017 10:43
URI: http://www.open-access.bcu.ac.uk/id/eprint/3748

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