Effects of EGR rate on performance and emissions of a diesel power generator fueled by B7

De Serio, D. and de Oliveira, Alex and Sodre, Jose Ricardo (2017) Effects of EGR rate on performance and emissions of a diesel power generator fueled by B7. Journal of the Brazilian Society of Mechanical Sciences and Engineering, 39 (6). pp. 1919-1927. ISSN 1678-5878

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Abstract

This paper analyses the impacts of the application of an exhaust gas recirculation (EGR) system on the performance and emissions of a stationary, direct-injection diesel engine operating with diesel oil containing 7% biodiesel (B7). Experiments were carried out in a 49-kW diesel power generator with the adapted EGR system, and engine performance and emissions were evaluated for different load and EGR settings. The results were compared with the engine operating with its original configuration without the EGR system, and revealed a reduction of peak cylinder pressure
and fuel conversion efficiency, mainly at high engine loads. The use of EGR caused opposite effects on carbon dioxide (CO2), carbon monoxide (CO) and total hydrocarbons (THC) emissions, depending on load and EGR rate,
showing an increase in most situations. The application of EGR consistently reduced oxides of nitrogen (NOX) emissions, reaching a maximum reduction close to 30%. In general, the use of EGR increased CO2, CO and THC emissions at high loads. The use of 7.5% EGR was found to be at an
adequate rate to simultaneously reduce CO, THC and NOX emissions at low and moderate loads, without major penalties on CO2 emissions and engine performance.

Item Type: Article
Additional Information: The final publication is available at link.springer.com via http://dx.doi.org/10.1007/s40430-017-0777-x
Uncontrolled Keywords: Diesel engine · Exhaust gas recirculation · Emissions · Fuel conversion efficiency · Power generation
Subjects: H100 General Engineering
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 Computing and Digital Technology
Faculty of Computing, Engineering and the Built Environment > School of Engineering and the Built Environment > Advanced Design Engineering
UoA Collections > UoA11: Computer Science and Informatics
Depositing User: $ Ian McDonald
Date Deposited: 08 Jun 2017 08:48
Last Modified: 01 Nov 2017 13:38
URI: http://www.open-access.bcu.ac.uk/id/eprint/4586

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