IJET Vol. 1, Issue 3, September 2015
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International Journal of Engineering Technologies (IJET) Dergisi / International Journal of Engineering Technologies (IJET)
Güncel Gönderiler
Öğe International Journal of Engineering Technologies (IJET) Vol. 1, Issue 3, September 2015(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2015) Çolak, İlhamiDear Colleagues, On behalf of the editorial board of International Journal of Engineering Technologies (IJET), I would like to share our happiness to publish the third issue of IJET. My special thanks are for members of editorial board, editorial team, referees, authors and other technical staff. Please find the third 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: 2149-5262Öğe Modelling of Instant Solar Radiation Using Average Instant Temperature of Ogbomoso, South Western, Nigeria(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2015-09-14) Adedokun, Oluwaseun; Abass, Aishat; Sanusi, YekinniThe paper is aimed at proffering an alternative means to the meteorological measuring stations by generating models for average instant solar radiation as a function of instant average temperature at places where measurement are not available. The data were processed using Microsoft excel software programming and regression analysis to generate a set of models for both morning and afternoon sessions of instant solar radiation of Ogbomoso as a function of temperature. In order to validate these models, statistical indicators like RMSE, MBE and MPE were used. The value of RMSE, MBE and MPE statistical indicators for morning and afternoon set of data were calculated to be 0.001219, -0.0000002, 0.0059% and 0.00033769, -0.00171225, -4.82%, respectively. From the t-test statics, percentage error between the measured and calculated values of instant average temperature, it is revealed that the set of models in this work can adequately be used in place of the data from the measuring stations since there is complementary relationship between the measured and the calculated instant solar radiation of Ogbomoso. And this modelling result could be used to estimate instant solar radiation at places where measurements are not available to design high performance solar radiation related devices.Öğe A Comparison of Experimental and Estimated Data Analyses of Solar Radiation, in Adiyaman, Turkey(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2015-08-25) Sogukpınar, Hacı; Bozkurt, İsmail; Calış, NazifThe world's main energy source is the sun. Other energy sources are caused directly or indirectly from the sun. Turkey has a rich potential in terms of solar energy and interest in solar power systems is increasing in the rapidly evolving technology. In all of the solar energy studies needs solar radiation data but solar radiation measurements are not possible on each area. Therefore, estimation of the solar radiation by using a variety of methods are emerging importance. In this study, Turkey and Adiyaman solar energy potential is investigated and statistical analysis was performed for Adiyaman. Various parameters were estimated by using actual solar radiation data from the Meteorology and experimental data were compared with theoretical ones. According to the results of the statistical analyzes, Adiyaman data indicate the best fit with the cubic model.Öğe Flow Visualization of Sloshing in an Accelerated Two-Dimensional Rectangular Tank(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2015-07-31) Şahin, Gürhan; Bayraktar, SeyfettinIn this paper, sloshing in a 2-Dimensonal (2-D) square liquid tank subjected to horizontal excitation is investigated by means of Computational Fluid Dynamics (CFD) technique. The tank with/out the vertical and horizontal baffles located at each side walls of the tank is moved on positive (+) x-axis for the excitation of 4.5 m2/s for each case studies. After series of simulations results obtained for each tank configuration are compared and flow is visualized for the tanks 50% filled with the fresh water.Öğe Different Implementation Approaches of the Strong Form Meshless Implementation of Taylor Series Method(İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press, 2015-06-22) Karamanlı, ArmağanBased on the Taylor series expansion (TSE) and employing the technique of differential transform method (DTM), three new meshless approaches which are called Meshless Implementation of Taylor Series Methods (MITSM) are presented. In particular, Strong Form Meshless Implementation of Taylor Series Methods (SMITSM) are studied in this paper. Then, the basis functions are used to solve a 1D second-order ordinary differential equation and 2D Laplace equation by using the SMITSM. Comparisons are made with the analytical solutions and results of Symmetric Smoothed Particle Hydrodynamics (SSPH) method. We also compared the effectiveness of the SMITSM and SSPH method by considering various particle distributions, nonhomogeneous terms and number of terms in the basis functions. It is observed that the MITSM has the conventional convergence properties and, at the expense of CPU time, yields smaller L2 error norms than the SSPH method, especially in the existence of nonsmooth nonhomogeneous problems.
