IJET Vol. 2, Issue 2, June 2016

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https://hdl.handle.net/11363/507

International Journal of Engineering Technologies (IJET) Dergisi / International Journal of Engineering Technologies (IJET)

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International Journal of Engineering Technologies (IJET) Vol. 2, Issue 2, June 2016
(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2016) Çolak, İlhami
Dear Colleagues, On behalf of the editorial board of International Journal of Engineering Technologies (IJET), I would like to share our happiness to publish the sixth issue of IJET. My special thanks are for members of editorial board, editorial team, referees, authors and other technical staff. Please find the sixth issue of International Journal of Engineering Technologies at http://dergipark.ulakbim.gov.tr/ijet. We invite you to review the Table of Contents by visiting our web site and review articles and items of interest. IJET will continue to publish high level scientific research papers in the field of Engineering Technologies as an international peerreviewed scientific and academic journal of Istanbul Gelisim University. Thanks for your continuing interest in our work, Professor ILHAMI COLAK Istanbul Gelisim University icolak@gelisim.edu.tr http://dergipark.ulakbim.gov.tr/ijet Printed ISSN: 2149-0104 e-ISSN: 2149-5262
New Solidification Materials in Nuclear Waste Management
(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2016-06-25) Yanikömer, Neslihan; Asal, Sinan; Hacıyakupoğlu, Sevilay; Akyıl Erentürk, Sema
One of the major worldwide environmental issue is the long-term storage or disposal of nuclear waste. Research in solidification materials for long-term storage of high-level nuclear wastes in nuclear industry has started as an imperative need. During the last decade, new solidification materials have been developed for immobilization of actinides and fission products for geological disposal. The materials used for immobilization generally have relatively complex compositions. The structure of these materials investigates using diffraction and spectroscopic methods. Most of the interest has focused on their chemical durabilities and capacity of waste loading. Their physical and chemical properties should not be degraded by a-decay event irradiation from the incorporated actinides. The development of new materials either for storage or for disposal for a long time is still required. In this article, recent developments in the use of solidification materials for the immobilization of high level of nuclear wastes have been reviewed. The comparison of properties of solidification materials is summarized with several applications in connection with experience and technological needs in literature.
Study on Machining Parameters for Thrust Force and Torque in Milling AA7039 Composites Reinforced with Al2O3/B4C/SiC Particles
(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2016-06-22) Karabulut, Şener
Metal matrix composites are used in many industrial fields such as automobile, military and aerospace applications due to their superior mechanical properties. In the present study, three aluminum 7039 metal matrix composite (MMCs) samples reinforced with 10 wt.% particulates of aluminum oxide (Al2O3), 10 wt.% boron carbide (B4C), and 10 wt.% silicon carbide (SiC) were successfully fabricated using a powder metallurgy and hot extrusion method. The influences of cutting parameters on the thrust cutting force and torque during milling of the three MMCs were investigated under dry machining conditions. The milling tests were performed based on the Taguchi orthogonal -array design of experiments, for different machining parameters such as cutting speed, feed and depth of cut. The effect of reinforcement contents on cutting force and torque were specified by utilizing analysis of variance (ANOVA). Mathematical models have been generated for the thrust force and torque through regression method. The results indicated that the minimal thrust force and torque were obtained in the machining of the Al2O3 reinforced specimen. The cutting force was directly influenced by the cutting feed and the axial cutting depth was the most effective machining parameter affecting milling torque in the machining of three composite specimens. The experimental results were modeled using regression analysis and artificial neural networks (ANN) to predict the thrust force and torque. The thrust force and torque were predicted with a mean squared error equal to 5.85% and 5.12% respectively using ANN models.
Improvement of Density, Viscosity and Cold Flow Properties of Palm Oil Biodiesel by Alcohol Addition
(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2016-06-22) Uludamar, Erinc; Karaman, Vedat; Yıldızhan, Şafak; Serin, Hasan
Alternative fuel researches has gained very importance due to depletion threads of fossil fuels, strictly narrowing emission regulations and high cost of petroleum. Biodiesel one of the most favorite alternative fuels since it is renewable and cleaner energy source. Many vegetable oils and animal fats are used for biodiesel production as raw material. Palm oil is an edible vegetable oil derived from the mesocarp (reddish pulp) of the fruit of the oil palms which is produced widely in some regions and used as raw material for many industrial sectors. Palm oil can be used as feedstock for biodiesel production but it has some drawbacks such as high viscosity and bad cold flow properties. In this study, some fuel properties of biodiesel produced from palm oil and its blends with various alcohols such as isopropyl alcohol, ethanol, and methanol were investigated. The study showed that the inadequate fuel properties of palm oil biodiesel such as viscosity and cold flow properties can be improved with varıous alcohol addition with the POME-5% methanol (CH3OH).
Steering Wheel Tie Rod Fatigue Life Determination According to Turkish Mission Profiles
(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2016-06-22) Şener, Arif Şenol
In this study, Turkish customer automobile usage was determined by a questionnaire in order to form the Turkish Mission profile for a LCV (light commercial vehicle). A comparison between Turkish customer usage and a of the European County’s mission profile was done. Referencing sale percentage of this vehicle and the region of the failures come out on other model vehicles were produced before and also Turkey’s geographic and climate condition, a new test road was formed for this kind of vehicle. İn order to determine Turkey’s rods fatigue characteristics a road test executed. About 50 road routes and some rough road’s fatigue characteristics were acquitted with a LCV (Light Commercial vehicle) equipped with sensors. Collected data were elaborated with a software program such as; spike analysis, frequency analysis, artihmethic manipulation etc.. After that the general load spectrum of Turkey’s roads belong to the steering wheel tie rod is formed. Rain-flow statistical counting method was applied steering wheel tie rod’s signals in order to make fatigue comparisons meaningfully and other application. Then Fatigue analysis of the steering wheel tie rod according to MP (Turkish mission profiles) were calculated by using FEA (Finite Element Analysis) and verified by the Palsmgren-Miner rule.
Determination of Some Physical Properties of Rapeseed
(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2016-06-22) Baran, Mehmet Fırat; Durgut, Mehmet Recai; Aktaş, Türkan; Ülger, Poyraz; Kayışoğlu, Birol
Rapeseeds (Brassica napus oleifera L.) were analyzed for some physical properties production in Kırklareli province. Also some physical properties of rapeseed such as seed moisture content, length, diameter, mass of single seed, thousand seed mass, geometric mean diameter, sphericity, seed volume, density, accumulation angle and friction coefficient have been determined. Kernel moisture, thousand kernel mass, plant length, plant stem diameter, yield of the harvested crop were determined as 8.34 %, 4.74 g, 158.2 cm, 8.10 mm, 3204 kg/ha, respectively. Length, diameter, mass of single kernel, geometric mean diameter, sphericity, bulk density, accumulation angle and friction coefficient were found as 2.35 mm, 1.93 mm, 0.0047g, 2.07 mm, 0.88, 5.07 mm3, 617 kg/m3, 290, 0.318 (on galvanized sheet), 0.288 (stainless steel), 0.305 (aluminium), respectively.
Artificial Neural Networks Study on Prediction of Dielectric Permittivity of Basalt/PANI Composites
(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2016-06-22) Eyecioğlu, Önder; Karabul, Yaşar; Alkan, Ümit; Kılıç, Mehmet; İçelli, Orhan
In the present study, the dielectric permittivity change of basalt (two type basalt; CM-1, KYZ-13) reinforced PANI composites were studied to determine the effects of PANI additivities (10.0, 25.0, 50.0 wt.%) at several frequencies from 100 Hz to 17.5 MHz by a dielectric spectroscopy method at the room temperature and artificial neural networks (ANNs) simulation. Also, the dielectric permittivity at 30.0 wt.% of PANI additivity was obtained by ANNs without experimental process. That process, a significant predictive instrument was produced which allows optimization of dielectric properties for numerous composites without substantial experimentation. It has been observed that PANI additivities decreased to dielectric constant of composites at low frequencies. Furthermore, the ANNs method have satisfactory accuracy for prediction of dielectric parameters.
Review on Natural Dye-Sensitized Solar Cells (DSSCs)
(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2016-06-22) Adedokun, Oluwaseun; Titilope, Kamil; Awodugba, Ayodeji Oladiran
In a conversion system of pure and non-convectional solar energy to electricity, dye sensitized solar cells (DSSCs) encourage the fabrication of photovoltaic devices providing high conversion efficiency at low cost. The dye as a sensitizer plays a vital role in performance evaluation of DSSCs. Natural dyes (organic dyes) has come to be a worth-while substitute to the rare and expensive inorganic sensitizers because of its cost effective, extreme availability and biodegradable. Different parts of a plant like fruits, leaves, flowers petals and bark have been tested over the years as sensitizers. The properties, together with some other parameters of these pigments give rise to improve in the operation standard of DSSCs. This review hash-out the history of DSSC with a focus on the recent developments of the natural dyes applications in this specific area with their overall appearance, the various components and the working principle of DSSCs as well as the work done over the years on natural dye based DSSCs.
On Load Single Phase Solid State Tap Changer
(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2016-06-22) Taha, Mohammad H.
In electric energy transmission and distribution system, voltage control is an essential part to maintain proper voltage limit at the consumer’s terminal. On-load tap-changers are indispensable in regulating power transformers used in electrical energy networks and industrial applications. General switching principles and application for the On-load tap-changers are discussed and presented. A single phase Tap-Changer using a GTO with antiparallel thyristor to perform switching of one upward or downward transition is described. in this paper. The logic of operation, simulation and experimental results for resistive, inductive loads are presented.

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