The effects of dimethyl ether enriched air (DMEA) on exhaust pollutants and performance characteristics of an old generation diesel engine

• Published in: International journal of sustainable engineering Vol. 14; no. 5; pp. 1143 - 1156
• Main Authors: Cong, Doan Nguyen, Duc, Khanh Nguyen, Nguyen, Vinh
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 03.09.2021; Taylor & Francis Ltd; Taylor & Francis Group
• Subjects: alternative energy; Carbon monoxide; Combustion; Diesel engines; Dimethyl ether; Emissions control; Energy consumption; enriched air; Full load; Intake manifolds; Nitrogen oxides; old generation diesel engine; Pollutants; Simulation; Test engines
• ISSN: 1939-7038; 1939-7046
• DOI: 10.1080/19397038.2021.1896590

In this study, the effect of dimethyl ether enriched air (DMEA) on pollutants and performance characteristics a diesel engine was evaluated. The combustion parameters have been evaluated by simulation method. Simulation results show that the in-cylinder pressure increases slightly while the combustion duration is shorter for DMEA-engine compared to the original case. In addition, a comparative test on DMEA-engine was carried out, in which DME was supplied into the intake manifold at a constant concentration to the mass of intake air. The results show that, when operating with DMEA, the brake specific energy consumption (BSEC) reduces slightly at full load condition by 2.20%. While, at a speed of 1600 rpm, the BSEC increases from 2.6% to 7.7% at low load and slides from 3.1% to 5.5% at high load condition. The smoke level reduces moderately when the test engine operating with DMEA by 6.25% on average at full load and 2.0% to 8.2% as load increases at intermediate speed condition. The CO emission reduces 5.28% while NO x and HC emission increase 5.62% and 7.1% on average at full load condition. At the speed of 1600 rpm, CO reduces 5.9% while NO x and HC increase by 7.1% and 27.5% on average.