An assessment of the biodiesel low-temperature combustion engine under transient cycles using single-cylinder engine experiment and cycle simulation

Junghwan Kim, Keunsoo Kim, Seungmook Oh and Sunyoup Lee

Energy, 2016, vol. 95, issue C, 471-482

Abstract: An operational strategy was developed to implement LTC (low-temperature combustion) with 50% biodiesel blended fuel (B50), named B-LTC, and evaluated under a combination of a single-cylinder engine experiment and a cycle simulation. The fuel consumption, regulated emissions, and exhaust gas temperature maps were constructed from experiments in a single-cylinder diesel engine at the speed range between 1000 and 1600 rev/min. A dataset of pumping and friction of a 6-cylinder diesel engine was employed to construct a 6000-cm3 B-LTC engine from the SCRE (single-cylinder research engine) experimental results. The engine maps of the virtual 6-cylinder B-LTC engine were then input into a zero-dimensional (0-D) model for the transient-cycle simulation. The cycle simulation was performed under the two representative transient cycles, namely the WHTC (worldwide harmonized transient cycle) and the NRTC (non-road transient cycle). The WHTC simulation estimated the engine-out CSNOx (cycle-specific NOx) of 0.94 g/kWh, which was lowered to 0.30 g/kWh by the SCR (selective catalytic reduction), while CSFC (cycle-specific fuel consumption) and cycle-specific soot (CSsoot) were 310 g/kWh and 0.01 g/kWh, respectively. The NRTC simulation results also showed that the engine-out CSsoot emission was 0.01 g/kWh. The urea-dosing SCR model reduced CSNOx from 0.99 g/kWh to 0.25 g/kWh. The CSFC was 274 g/kWh in the NRTC simulation.

Keywords: Biodiesel; Low-temperature combustion; Diesel; Transient cycle simulation (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:95:y:2016:i:c:p:471-482

DOI: 10.1016/j.energy.2015.12.023

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