Influence of operating parameters on performance and emissions for a compression-ignition engine fueled by hydrogen/diesel mixtures |
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| Affiliation: | 1. Department of Mechanical Engineering, Government College of Engineering, Amravati, Maharashtra 444603, India;2. Department of Mechanical Engineering, Birla Institute of Technology, Mesra, Ranchi 835215, India;1. Vilnius Gediminas Technical University, Faculty of Transport Engineering, J. Basanaviciaus 28, LT-03224 Vilnius, Lithuania;2. Czestochowa University of Technology, Faculty of Mechanical Engineering and Computer Science, Dabrowskiego 69 street, 42-201 Czestochowa, Poland;1. School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China;2. Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, IL 61801, USA;3. Universidad de Castilla-La Mancha, E.T.S. Ingenieros Industriales, Edificio Politecnico, Avenida Camilo José Cela s/n. 13071, Ciudad Real, Spain;1. Bangladesh Power Development Board, Ministry of Power, Energy and Mineral Resources, Power Division, Bangladesh;2. Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;3. Department of Mechatronics Engineering, International Islamic University Malaysia, Jalan Gombak, 53100 Kuala Lumpur, Selangor, Malaysia;1. Adana Science and Technology University, Department of Mechanical Engineering, 01180 Adana, Turkey;2. Adana Science and Technology University, Department of Automotive Engineering, 01180 Adana, Turkey |
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| Abstract: | Hydrocarbon exhaust emissions are mainly recognized as a consequent of carbon-based fuel combustion in compression ignition (CI) engines. Alternative fuels can be coupled with hydrocarbon fuels to control the pollutant emissions and improve the engine performance. In this study, different parameters that influence the engine performance and emissions are illustrated with more details. This numerical work was carried out on a dual-fuel CI engine to study its performance and emission characteristics at different hydrogen energy ratios. The simulation model was run with diesel as injected fuel and hydrogen, along with air, as inducted fuel. Three-dimensional CFD software for numerical simulations was implemented to simulate the direct-injection CI engine. A reduced-reaction mechanism for n-heptane was considered in this work instead of diesel. The Hiroyasu-Nagel model was presented to examine the rate of soot formation inside the cylinder. This work investigates the effect of hydrogen variation on output efficiency, ignition delay, and emissions. More hydrogen present inside the engine cylinder led to lower soot emissions, higher thermal efficiency, and higher NOx emissions. Ignition timing delayed as the hydrogen rate increased, due to a delay in OH radical formation. Strategies such as an exhaust gas recirculation (EGR) method and diesel injection timing were considered as well, due to their potential effects on the engine outputs. The relationship among the engine outputs and the operation conditions were also considered. |
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| Keywords: | Hydrogen levels Diesel Dual-fuel engine Soot formation Ignition delay |
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