Journal
ENERGIES
Volume 14, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/en14051428
Keywords
biodiesel; ethanol additives; idling speed; engine performance; combustion and emission characteristics
Categories
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2019R1I1A1 A01057727]
- Korean government (MSIT) [2019R1F1A1063154]
- National Research Foundation of Korea [2019R1F1A1063154] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This study found that adding ethanol to a diesel engine fueled with palm oil biodiesel under idling conditions can increase peak cylinder pressure and heat release rate, while reducing emissions, with a maximum reduction in smoke opacity of 71%.
Biodiesel is known for its high cetane number and high oxygen content among other advantages, but its high viscosity and density are not trivial issues for fuel flow and atomization, especially under idling conditions. Due to low cylinder temperature and incomplete combustion, engine idling is one of the worst operating conditions. As a common fuel additive, ethanol can address some of the shortcomings of biodiesel. This work evaluated the combustion and emission characteristics of different concentrations of ethanol additives on a diesel engine fueled with palm oil biodiesel under idling conditions. The results show that ethanol helps to increase peak cylinder pressure and heat release rate, suppressing the production of certain emissions with a maximum reduction in smoke opacity of 71%.
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