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Water Injection Effects on the Performance and Emission Characteristics of a CI Engine Operating with Biodiesel

Tesfa, Belachew, Mishra, Rakesh, Gu, Fengshou and Ball, Andrew (2012) Water Injection Effects on the Performance and Emission Characteristics of a CI Engine Operating with Biodiesel. Renewable Energy, 37 (1). pp. 333-344. ISSN 0960-1481

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Abstract

Biodiesel is one of the most promising renewable, alternative and environmentally friendly biofuels that can be used in diesel engine without any need for any modification in the engine. However, researchers have reported that the engines running with biodiesel emit NOx in higher concentrations. To address this problem, in the present study an experimental investigation has been carried out on the combustion, performance and emission characteristics of a compression ignition (CI) engine running with biodiesel under steady state conditions with a novel NOx reducing mechanism involving a water injections system. The experimental work has been conducted on a four-cylinder, four-stroke, direct injection (DI) as well as turbocharged diesel engine. In this investigation, biodiesel (produced from the rapeseed oil by transesterfication process) has been used. During the experiments the in-cylinder pressure, specific fuel consumption, water injection flow rate, fuel flow rate and exhaust emission (NOx, CO, CO2 and THC) were measured. The experimental results clearly indicate that water injection at a rate of 3kg/h results in the reduction of NOx emission by about 50% without causing any significant change in the specific fuel consumption. Furthermore, the water injection in the intake manifold has little effect on the in-cylinder pressure and heat release rate of the CI engine under different operating conditions.

Item Type: Article
Uncontrolled Keywords: water injection, NOx emission, cylinder pressure
Subjects: T Technology > TJ Mechanical engineering and machinery
Schools: School of Computing and Engineering
School of Computing and Engineering > Automotive Engineering Research Group
School of Computing and Engineering > Diagnostic Engineering Research Centre > Energy, Emissions and the Environment Research Group
School of Computing and Engineering > Diagnostic Engineering Research Centre > Machinery Condition and Performance Monitoring Research Group
School of Computing and Engineering > Diagnostic Engineering Research Centre > Measurement System and Signal Processing Research Group
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Depositing User: Belachew Tesfa
Date Deposited: 01 Mar 2011 16:06
Last Modified: 11 Oct 2011 13:29
URI: http://eprints.hud.ac.uk/id/eprint/9678

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