Investigations on Performance and Emissions of a Stationary DI Diesel Engine with Different Exhaust Gas Recirculation Temperatures
Journal Title: International Journal of Automotive Engineering and Technologies - Year 2013, Vol 2, Issue 1
Abstract
This paper addresses the application of Exhaust Gas Recirculation (EGR) for reduced oxides of nitrogen (NOx) emissions from naturally aspirated direct injection stationary diesel engine. Prevailing and future emission norms compel engine manufacturers to incorporate techniques to reduce engine out emissions especially NOX and particulate matter NOx formation predominantly depends on high combustion temperature and literature indicates EGR is an attractive method to reduce combustion temperature. EGR temperature is an important factor while admitting higher percentage of EGR. Higher EGR temperatures caused due to increased loads limit the conduct of higher EGR ratios. EGR cooling can be advantageous when higher ratios of EGR need to be employed. The effect EGR temperature on engine thermal efficiency, NOx, smoke and HC emissions at different load conditions for different EGR percentage are discussed in this paper. NOx reductions and thermal efficiency were found to be better for hot EGR up to about 30% EGR and thereafter EGR cooling shows better results. Smoke and HC emissions increase for both cooled and hot EGR as compared to no EGR case but EGR cooling reduces HC emission as compared to hot EGR.
Authors and Affiliations
Gurumoorthy S. Hebbar*| Mechanical Engineering Department, Christ University Faculty of Engineering Kanminike, Kumbalagodu –Kengeri, Bangaluru-560074, Karnataka, INDIA., Anant Krishna Bhat| Mechanical Engineering Department,Gogte Institute of Technology, Belguam 590008 Karnataka, INDIA.
Keywords
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