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Öğe The effect of n-butanol additive on low load combustion, performance and emissions of biodiesel-diesel blend in a heavy duty diesel power generator(Elsevier, 2017-04) Işık, Mehmet Zerrakki; Bayındır, Hasan; İşcan, Bahattin; Aydın, HüseyinDiesel power generators are often used under partially load conditions. Especially, under low load conditions, it is crucial to find a solution for their considerably high brake specific fuel consumption (bsfc) and exhaust output emissions. Other points are the usability of waste cooking oil and an oxygenated alternative fuel in low load conditions of diesel generator. In this point of view, 10% n-butanol and 10% biodiesel mixture was blended with 80% of ultra low sulfur diesel fuel named here as BB20 was used and comparisons have been made with 20% biodiesel/80% diesel fuel named here as B20 and ultra low sulfur diesel fuel named here as (D2). Previously, main important physical and chemical fuel properties of test fuel have been found. These fuels were tested in low load operations of a diesel engine generator in order to find out the effects of blend fuels on combustion characteristics, performance and emissions of the test engine. The test results are presented in this paper and seem to raise quite interesting points. Butanol addition to diesel and biodiesel blends can be considered as a good solution for reducing density, viscosity and thus sustainable usability of biodiesel and increase thermal efficiency and lower carbon monoxide (CO) and oxides of nitrogen (NOx) under comparatively lower load conditions in diesel power generator engines.Öğe Improving the usability of vegetable oils as a fuel in a low heat rejection diesel engine(Elsevier, 2012-06) İşcan, Bahattin; Aydın, HüseyinUsability of a waste vegetable oil in coated diesel engines was experimentally investigated. Waste corn oil was blended with petroleum diesel fuel by ratios of 15% corn oil to %85 diesel fuel (B15), 35% corn oil to %65 diesel fuel (B35) and 65% corn oil to %35 diesel fuel (B65). The surfaces of the engine piston and both intake and exhaust valves were coated with ZrO 2 layer in order to make the combustion chamber insulated. Thus heat transfer through the combustion chamber was aimed to be reduced with the purpose of increasing the thermal efficiency and performance of the engine and also maintain the usability of vegetable oil in diesel engines. B15, B35, B65 and standard diesel fuels were used in the coated test engine. Performance parameters and exhaust emissions characteristics of all the above mentioned fuels were clarified and compared with uncoated engine test values of normal diesel fuel. It is believed that the main purpose of this study has been achieved as the engine performance parameters such as power and torque of the engine were increased with simultaneous decreases in the brake specific fuel consumption (bsfc). Besides, many of exhaust emission parameters such as CO, HC, and smoke opacity were decreased.
