33 sonuçlar
Arama Sonuçları
Listeleniyor 1 - 10 / 33
Öğe Combustion, performance and emissions of a diesel power generator fueled with biodiesel-kerosene and biodiesel-kerosene-diesel blends(Elsevier, 2017-02-05) Bayındır, Hasan; Işık, Mehmet Zerrakki; Argunhan, Zeki; Yücel, Halit Lütfi; Aydın, HüseyinHigh percentages of biodiesel blends or neat biodiesel cannot be used in diesel engines due to high density and viscosity, and poor atomization properties that lead to some engine operational problems. Biodiesel was produced from canola oil by transesterification process. Test fuels were prepared by blending 80% of the biodiesel with 20% of kerosene (B80&K20) and 80% of the biodiesel with 10% of kerosene and 10% diesel fuel (B80&K10&D10). Fuels were used in a 4 cylinders diesel engine that was loaded with a generator. Combustion, performance and emission characteristics of the blend fuels and D2 in the diesel engine for certain loads of 3.6, 7.2 and 10.8 kW output power and 1500 rpm constant engine speed were experimented and deeply analyzed. It was found that kerosene contained blends had quite similar combustion characteristics with those of D2. Mass fuel consumption and Bscf were slightly increased for blend fuels. HC emissions slightly increased while NOx emissions considerably reduced for blends. It was resulted that high percentages of biodiesel can be a potential substitute for diesel fuel provided that it is used as blending fuel with certain amounts of kerosene.Öğe RCCI yanmalı motorda aspir biyodizeli karışımları ve benzin kullanımının orta yüklerde performans ve emisyon etkilerinin incelenmesi(Fırat Akademi A.Ş, 2017) Aydın, Hüseyin; Işık, Mehmet Zerrakki; Oktay, HasanDizel bir jeneratörde RCCI uygulamasının performans ve emisyonlar üzerine etkileri, yüksek reaktviteli (birincil yakıt) yakıt olarak aspir yağı biyodizeli ve dizel karışımları, düşük reaktiviteli yakıt olarak benzin kullanımıyla incelenmiştir. RCCI uygulaması ikincil bir yakıt enjeksiyon sisteminin emme manifolduyla irtibatlandırılmasıyla sağlanmıştır. Benzin RCCI uygulama oranı motorun toplam kütlesel yakıt tüketiminin %40'u ve %60'si oranında olup, PFI olarak önceden karıştırılmıştır. Testler dizel-jeneratör grubunun tam gücünün %50’ine karşılık gelen ve orta yükleme sayılacak sabit bir 7.2kW motor gücü ve 1500devir/dakikalık bir motor devri gerçekleştirildi. Dizel ile biyodizel karışımının amacı, yanmanın başlamasını kolaylaştırmak için birincil yakıtın reaktivitesini arttırmaktır. Motor alanındaki çalışmaların için en önemli performans ve emisyon parametreleri derinlemesine incelenmiş ve sonuçlar sunulmuştur. RCCI uygulamasında toplam yakıt tüketimi artmış, NOx emisyonları önemli ölçüde azalırken, CO ve HC emisyonları düşük oranda artmıştır.Öğe Konsantrik tip bir ısı değiştiricisinde türbülatörlerin etkisinin sayısal incelenmesi(Muğla Sıtkı Koçman Üniversitesi, 2015) Oktay, Hasan; Budak Ziyadanoğulları, Neşe; Yücel, Halit Lutfi; Işık, Mehmet ZerrakkiÖğe Çok katmanlı duvar ve çatı tiplerinin ısıl ve fiziksel özelliklerinin dinamik ısıl karakterlerine olan etkisinin incelenmesi(Muğla Sıtkı Koçman Üniversitesi, 2015) Oktay, Hasan; Budak Ziyadanoğulları, Neşe; Argunhan, Zeki; Yumrutaş, Recep; Işık, Mehmet ZerrakkiÖğe Aspir ve kanola biyodizeli kullanımının egzoz emisyonu ve motor performansına etkilerinin incelenmesi(Küresel Mühendislik Çalışmaları Dergisi, 2016-04-01) Aydın, Hüseyin; Işık, Mehmet Zerrakki; Ziyadanoğulları Budak, Neşe; Oktay, Hasan; Bayındır, Hasan; Yücel, Halit LutfiBiodiesel fuel, which can be produced from crude or waste vegetable oil, is an important alternative renewable fuel for diesel engines. Particularly the use of vegetable oils for diesel engines has found an important place in several surveys. Biodiesel can be used alone, or blended with petrodiesel in any proportions. Biodiesel is suitable for usage at conventional diesel engines without modification. In this study, canola and safflower oil biodiesel methyl is realized by using the esterification method.. The produced biodiesels were blended in %(50) (in volume) with diesel fuel. The blends were tested in a four cycle, four cylinder Diesel engine. The effects of biodiesel addition to Diesel No. 2 on the performance and emissions of the engine were examined at full load. The resulting performance values were found to be similar to diesel fuel. In general, specific fuel consumption of biodiesel is higher than diesel at all engine loads. Significant difference between the exhaust temperature is not determined. AB50 biodiesel compared to diesel HC emissions at high loads began to decline. NOx, CO2 and O2 emissions ratio has increased at high loads for Biodiesel fuels. Experimental results showed that the produced biodiesels can be partially substituted for the diesel fuel at most operating conditions in terms of the performance parameters and emissions without any engine modification and preheating of the blends.Öğe Etanol RCCI uygulamasının aspir yağı biodizeli ve dizel karışımları kullanılan dizel jeneratörde performans ve emisyon üzerine etkilerini incelenmesi(Batman Üniversitesi, 2018) Aydın, Hüseyin; Işık, Mehmet ZerrakkiÖğe Gerçek ve sabit termofiziksel özelliklere sahip duvarlar ve çatılar için elde edilen ısı kazancı değerlerinin karşılaştırılması(Batman Üniversitesi, 2018) Oktay, Hasan; Yumrutaş, Recep; Demir, Mehmet Emin; Işık, Mehmet ZerrakkiÖğe Konsantrik boru tip ısı değiştiricilerinde türbülatörlerin kanat delik geometrisinin ısı transferine ve basınç düşüşüne etkisi(Fırat Üniversitesi, 2011) Işık, Mehmet Zerrakki; Argunhan, Zeki; Yıldız, CengizThe effect of wing hole geometry of the vortex generator on heat transfer and pressure drop in concentric tube type heat exchangers has been investigated in this study.For experiments, two type of hole geometrywereselected.One has four rectengular hole with 2x7mm in dimension andthe other four circular hole with 5mm in diameter andapplied for 55-65-75-90 degree blade angles. Turbulator diameter is 60 mm and includes 6 blades. Air was used as hot stream, whereas water as cold stream. Experimental results were scrutinized.Heat transfer and pressure drop werefound high with usage of circular holes geometry.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, HüseyinThe 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.Öğe Combustion parameters of canola oil kerosene blend in different loading operations of a diesel engine power generator(Kilis 7 Aralık Üniversitesi, 2016) Aydın, Hüseyin; Işık, Mehmet Zerrakki
