Seoul National University · Chemical Engineering
Professor Han Ho Song's research lab specializes in advanced internal combustion engine technologies, with a primary focus on homogeneous charge compression ignition (HCCI) and low-emission combustion systems. The lab investigates fundamental combustion phenomena, including fuel reactivity, ignition delay, and turbulence dynamics, using both experimental and modeling approaches. Key research directions include engine cycle optimization, exergy analysis for improved efficiency, and hybrid energy systems integrating HCCI engines with fuel cells. The lab also explores innovative strategies such as negative valve overlap, turbocharging, and high compression ratios to enhance performance and reduce emissions.
Figures are computed from collected data and may differ slightly.
In-cylinder pre-processing (or recompression reaction) of pilot-injected fuel during negative value overlap (NVO) has been investigated as a method to extend the low-load limit of residual-effected homogeneous charge compression ignition (HCCI). In an effort to elucidate the chemical and thermal effects involved, model calculations have been performed on the recompression reaction and ignition delay of the recompression products using a reduced n-heptane mechanism (160 reactions, 1424 reactions)
Experiments have been reported in the literature in which the low-load limit of a retention-mode HCCI engine operating on gasoline has been significantly extended by pre-processing of the fuel during negative valve overlap. This paper presents experimental studies in which this low-load-limit extension is demonstrated and characterized using simple, single-component hydrocarbon fuels with relatively well-known chemical kinetics. The model fuels were n-heptane and i-octane and this choice was mad
In a previous study, a new hybrid system of molten carbonate fuel cell (MCFC) and homogeneous charge compression ignition (HCCI) engine was developed, where the HCCI engine replaces the catalytic burner and produces additional power by using the left-over heating values from the fuel cell stack. In the present study, to reduce the additional cost and footprint of the engine system in a hybrid configuration, the possibility of engine downsizing is investigated by using two strategies, i.e. the us
Open papers in the app to read, cite, and organize with AI.
