Yazar "Argunhan, Zeki" seçeneğine göre listele

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    Combustion, performance and emissions of a diesel power generator fueled with biodiesel-kerosene and biodiesel-kerosene-diesel blends
    (Pergamon-Elsevier Science Ltd, 2017) Bayindir, Hasan; Isik, Mehmet Zerrakki; Argunhan, Zeki; Yucel, Halit Lutfu; Aydin, Huseyin
    High 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. (C) 2017 Elsevier Ltd. All rights reserved.
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    Dairesel kesitli bir borunun girişine yerleştirilen delikli sabit kanatçıklı dönme üreticinin ısı geçişi ve basınç düşüşüne etkileri
    (2006) Argunhan, Zeki; Yıldız, Cengiz
    Bu çalışmada iç içe borulu ısı değiştirgecinde farklı delik sayılı dönme üreticilerin ısı transferine ve basınç düşüşüne etkisi deneysel olarak araştırılmıştır. Bu amaçla değiştirgecin 60 mm çapındaki iç borunun girişine 55° kanat açısına sahip ve kanatlarında birer, ikişer, üçer ve dörder adet dairesel delikler bulunan dönme üreticiler yerleştirilerek deneyler yapılmıştır. Bunlar iç borunun girişine rahat takılıp sökülebilecek şekilde dizayn edilmişlerdir. İç borunun içinden sıcak akışkan olarak hava, iç borunun dışından ise soğuk akışkan olarak su geçmektedir.
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    Dikdörtgen delikli türbülatörlerde delik sayısının ısı geçişine ve basınç düşüşüne etkisi
    (2006) Argunhan, Zeki; Yıldız, Cengiz
    Bu çalışmada iç içe borulu ısı değiştirgecinde boru girişine yerleştirilen türbülatörlerin (girdap tip akış üreticilerinin) ısı geçişine ve basınç düşüşüne etkisi deneysel olarak araştırılmıştır. Bu amaçla iç içe borulu ısı değiştirgecinin 60 mm çapındaki iç borunun girişine 55º açılı kanatlara sahip ve kanatlarında 2x7 mm ebadında düzgün sıralanmış birer, ikişer, üçer, dörder ve beşer adet dikdörtgen geometrili delikler bulunan türbülatörler yerleştirilerek, bu türbülatörlerin ısı geçişine ve basınç düşüşüne etkileri araştırılmak üzere deneyler yapılmıştır. İç borunun içinde sıcak akışkan olarak hava, dışında ise soğuk akışkan olarak su geçmektedir. Kullanılan türbülatörlerle aynı yönlü paralel ve zıt yönlü paralel akışta deneyler yapılmıştır.
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    THE EFFECTS OF SWIRL GENERATOR HAVING WINGS WITH HOLES ON HEAT TRANSFER AND PRESSURE DROP IN TUBE HEAT EXCHANGER
    (Pamukkale Univ, 2006) Argunhan, Zeki; Yildiz, Cengiz
    This paper examines the effect of turbulance creators on heat transfer and pressure drop used in concentric heat exchanger experimentaly. Heat exchanger has an inlet tube with 60 mm in diameter. The angle of swirl generators wings is 55 degrees with each wing which has single, double, three and four holes. Swirl generators is designed to easily set to heat exchanger entrance. Air is passing through inner tube of heat exhanger as hot fluid and water is passing outer of inner tube as cool fluid.
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    Experimental investigation of the effects of diesel-like fuel obtained from waste lubrication oil on engine performance and exhaust emission
    (Elsevier Science Bv, 2010) Arpa, Orhan; Yumrutas, Recep; Argunhan, Zeki
    In this study, effects of diesel-like fuel (DLF) on engine performance and exhaust emission are investigated experimentally. The DLF is produced from waste engine lubrication oil purified from dust, heavy carbon soot, metal particles, gum-type materials and other impurities. A fuel production system mainly consisting of a waste oil storage tank, filters, a reactor, oil pump, a product storage tank, thermostats and control panel is designed and manufactured. The DLF is produced by using the system and applying pyrolitic distillation method. Characteristics, performance and exhaust emissions tests of the produced DLF are carried out at the end of the production. The characteristic tests such as density, viscosity, flash point, heating value, sulfur content and distillation of the DLF sample are performed utilizing test equipments presented in motor laboratory of Mechanical Engineering Department, University of Gaziantep, Turkey. Performance and exhaust emission tests for the DLF are performed using diesel test engine. It is observed from the test results that about 60 cc out of each 100 cc of the waste oil are converted into the DLF. Characteristics and distillation temperatures of the DLF are close to those values of a typical diesel fuel sample. It is observed that the produced DLF can be used in diesel engines without any problem in terms of engine performance. The DLF increases torque, brake mean effective pressure, brake thermal efficiency and decreases brake specific fuel consumption of the engine for full power of operation. (C) 2010 Elsevier B.V. All rights reserved.