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İndeks: Web of Science × Konu: Safflower ×

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  • Küçük Resim
    Öğe
    Analysis of ethanol RCCI application with safflower biodiesel blends in a high load diesel power generator
    (Elsevier, 2016-11-15) Işık, Mehmet Zerrakki; Aydın, Hüseyin
    The effects of RCCI in a diesel power generator by using safflower oil biodiesel-diesel blends were experimentally investigated. Ethanol was premixed as PFI by rates of 30% and 50% of total mass fuel consumption of the engine. Tests were conducted at constant engine speed of 1500 rpm and fixed load 10.8 kW engine power. The purpose of blending biodiesel with diesel is to increase the fuel reactivity of primary fuel in order to easily initiate the combustion. Therefore, test fuels were prepared by blending 10% of the biodiesel with 90% of diesel, 20% of the biodiesel with 80% of diesel and 50% of the biodiesel with 50% of diesel. The most important combustion, performance and emission indicators of the engine under various conditions have been deeply investigated and results have been presented. The ethanol RCCI operation increased peak pressure values especially with using of B50 as high reactivity fuel while combustion was retarded for both RCCI modes. Overall, many indicators of the combustion was improved. Performance parameters were developed. Especially, bsfc was considerably increased. NOx, emissions were considerably decreased while CO and HC emissions were a bit increased.
  • Küçük Resim
    Öğe
    Investigation of the effects of butanol addition on safflower biodiesel usage as fuel in a generator diesel engine
    (Elsevier, 2018-06-15) Aydın, Hüseyin; Çelebi, Yahya
    As our world demands more and more energy and fossil fuel resources are running out, searches onfindingalternative fuels in internal combustion engines are increasing. Alcohols and biofuels obtained from oils can beused as alternative diesel fuels. The present work investigated the effects ofn-butanol addition to safflowerbiodiesel usage in a diesel engine used for driving an electrical power generator. Safflower biodiesel was ob-tained by using transesterification method. Binary blends of butanol-biodiesel and ternary blends of ultra-lowsulfur diesel-biodiesel–butanol were contained 5%, 10%, and 20% butanol in volume basis. The tests werecarried out on a four-cylinder, four-strokes, and direct-injection diesel engine at half load operation with stableengine speed of 1500 rpm. Experimental test results on combustion characteristics, emission and performance ofthe fuels were investigated. According to test results, formation of heat release rates and in-cylinder pressurecurves were considerably similar and total heat transfer, average gas temperature and mass fraction burned wereslightly changed. The ternary blends showed lower emission and increased brake thermal efficiency up to 1.5%.Besides, average mass fuel consumption was increased up to 5% and brake specific fuel consumption up to 6%.For the other fuels, emission and brake thermal efficiency were deteriorated.
  • Küçük Resim
    Öğe
    Investigation on the effects of gasoline reactivity controlled compression ignition application in a diesel generator in high loads using safflower biodiesel blends
    (Elsevier, 2019-04) Işık, Mehmet Zerakki; Aydın, Hüseyin
    In this study, the effects of Reactivity Controlled Compression Ignition (RCCI) application on engine combustion, performance and emissions in a diesel generator were investigated. In the experiments, safflower oil derived biodiesel and diesel mixtures were used as the high reactivity fuel (primary fuel) and gasoline as the low reactivity fuel. The RCCI application was provided by the connection of a secondary fuel injection system with the intake manifold. The gasoline RCCI application rate was 30% and 50% of the total mass fuel consumption of the engine and was pre-mixed as port fuel injection (PFI). Tests were performed at a constant engine load (10.8 kW) and engine speed of 1500 rpm. The purpose of using diesel and biodiesel mixtures is to increase the reactivity of the primary fuel that facilitates the start of the combustion. The combustion, performance and emissions, which are the most important parameters of the engine operation, have been thoroughly investigated and the results were presented. In RCCI application, in peak values of pressure, velocity of heat release, average gas temperature partial increases were determined. When the ratio of gasoline PFI was increased, the NOx emissions significantly decreased and the engine efficiency was also increased, while the CO and HC emissions were slightly increased.
  • Küçük Resim
    Öğe
    An innovative research on variable compression ratio in RCCI strategyon a power generator diesel engine using CNG-safflower biodiesel
    (Elsevier, 2021-09-15) Aydın, Hüseyin
    The CNG usage as a fuel in IC engines have many advantages such as decreasing CO2and PM and smokeemissions and in many cases reducing NOx emission, along with its low prices and naturally abundancespread on the world. In heavy loaded operation of diesel engines, it becomes very hard to controlexcessive NOx, and PM formation in the exhaust emissions and smoke accumulation especially forbiodiesel usage. In the present study, in order to achieve the usability of higher percentages of biodieselwith CNG, the low temperature combustion of reactivity controlled compression ignition (RCCI) strategyhave been applied in a single cylinder diesel engine with variable compression ratios. The CNG, as thelow reactivity fuel, was subjected to the intake manifold as the substitute the gas with 5%, 10% and 15% ofbiodiesel under 1500 rpm and 10.8 kW(full load) load of the engine with variable compression ratiosfrom 13:1 to 19:1 in order to investigate the effects of compression ratios on RCCI operation with highpercentages of biodiesel and CNG usage. Apart from the main performance, emissions and combustionindicators of diesel engines tests, 3 novel parameters (SPE, STE and SHRE) were created for thefirst timein order to deeply evaluate the combustion. Mean of cylinder pressure was increased while combustionduration was lowered for CNG usage with biodiesel. BTE was increased while BSEC and BSFC weredecreased in either operation of biodiesel/CNG RCCI and various CR. In addition, NOx emissions werelowered for CNG usage and CR decrease, along with smoke decrease for biodiesel/CNG RCCI combustion.