Person: SAĞLAM, ŞAFAK
Loading...
Email Address
Birth Date
Research Projects
Organizational Units
Job Title
Last Name
SAĞLAM
First Name
ŞAFAK
Name
7 results
Search Results
Now showing 1 - 7 of 7
Publication Metadata only A technical review of building-mounted wind power systems and a sample simulation model(2012) SAĞLAM, ŞAFAK; Ayhan D., Saǧlam A.Small scale wind turbines installed within the built environment is classified as micro generation technology. This paper reports the investigation results of wind power application in buildings. First, general information is given for common type of wind turbines are used on buildings. Second, the wind aerodynamics and wind flows over the buildings are investigated based on local meteorological data and local building characteristics. However, to receive the highest potential wind energy resource and avoid turbulent areas, the tool of Computational Fluid Dynamics (CFD) has to be used to model the annual wind flows over buildings to help analyze, locate, and design wind turbines on and around buildings. Three different sample models for buildings and rural residential areas are explained with CFD models. © 2011 Elsevier Ltd. All rights reserved.Publication Open Access The importance of in-service training in restructuring sectors(ELSEVIER SCIENCE BV, 2010) ORAL, BÜLENT; Oral, Bulent; Saglam, Safak; Uzunboylu, HReduction or abolishment operation of government's intervention to economy, accelerating since the beginning of 1980s, is adopted by many governments as governance policy. This policy, being widely used in manufacturing industry and service sector at the beginning, has been used subsequently in electricity, natural gas, water ... etc industry as natural monopoly. The employee needs to know position at institution organization, individual value and expectations. It is effective on the employee performance. In this context, the employees can take in-service education their institutions and regulatory authorities, which regulate and supervise the sectors. The in-service education plan is supported the program content and process by academic circles. In this study, it is emphasized process and content of scheduled in-service education program.Publication Metadata only Light sources of solar simulators for photovoltaic devices: A review(PERGAMON-ELSEVIER SCIENCE LTD, 2017) ORAL, BÜLENT; Esen, Vedat; Saglam, Safak; Oral, BulentAs solar power usage is increasing nowadays, performance tests have become one of the most important topics in order to guarantee the security of photovoltaic tools. For photovoltaic panels to become efficient, there is need for health testing of all materials and technologies used in the production of the panels in electrical and optical aspects. Thus, when future energy standards are considered, it is imperative to use solar simulators that obtain near real sunlight spectrum values. The most important components of solar simulators used in photovoltaic panel tests are light sources. In this study, solar simulators' were classified based on the light sources they use, and their history and technological development were investigated in line with the literature. Within the scope of this study, carbon arc lamps, sodium vapor lamps, argon arc lamps, quartz-tungsten halogen lamps, mercury xenon lamps, xenon arc, xenon flash lamps, metal halide lamps, LED and super continuum laser light sources were investigated. Additionally, to compare spectral deficiency among these light sources and solar simulators, multiple light sourced solar simulators were also covered under a separate title.Publication Metadata only Controlling of grid connected photovoltaic lighting system with fuzzy logic(PERGAMON-ELSEVIER SCIENCE LTD, 2010) ERDAL, HASAN; Saglam, Safak; Ekren, Nami; Erdal, HasanIn this study, DC electrical energy produced by photovoltaic panels is converted to AC electrical energy and an indoor area is illuminated using this energy. System is controlled by fuzzy logic algorithm controller designed with 16 rules. Energy is supplied from accumulator which is charged by photovoltaic panels if its energy would be sufficient otherwise it is supplied from grid. During the 1-week usage period at the semester time, 1.968 kWh energy is used from grid but designed system used 0.542 kWh energy from photovoltaic panels at the experiments. Energy saving is determined by calculations and measurements for one education year period (9 months) 70.848 kWh. (C) 2009 Elsevier Ltd. All rights reserved.Publication Open Access Transformation of technical education faculties in Turkey in the process of European Union: Faculty of applied sciences(ELSEVIER SCIENCE BV, 2010) ORAL, BÜLENT; Saglam, Safak; Oral, Bulent; Uzunboylu, HCountries education systems unavoidably changes to adapt themselves to innovations because of developing technology and globalization. This perspective technical education faculty position is queried which are established with the aim of educate technical teachers for vocational high schools in Turkey. Faculty of applied sciences model can replace with the technical education faculty that has completed its mission. It is possible to educate engineers with the faculty of applied sciences who has qualified, keep up the technology and has the characteristics necessary for the working life. (C) 2010 Elsevier Ltd. All rights reserved.Publication Open Access Investigation on efficiency of in-wheel BLDC motors for different winding structures(GAZI UNIV, FAC ENGINEERING ARCHITECTURE, 2019-06-21) SAĞLAM, ŞAFAK; Cabuk, Ali Sinan; Saglam, Safak; Ustun, OzgurElectric machine windings are the essential elements which affect machine performance and efficiency substantially. Two main criteria are considered during winding design: impact on performance and manufacturing costs. In this study, different winding structure combinations are investigated by implementing in an in-wheel motor structure. The motor is a surface mounted permanent magnet BLDC motor which is intended to use in light electric vehicles. According to the design data, the obtained optimum design is manufactured and tested. Accurately captured test results are compared to the calculated values. The direct drive in-wheel BLDC motor used in this study has the rated values of 2.5 kW output power, 900 min-1 shaft speed and 150 V terminal voltage. A Finite Element Method (FEM) based software is used for the design study, that is called ANSYS Electronics Desktop. Effects of different winding topologies are studied by keeping the motor structure and materials unchanged. The validation of the optimized design is realized by conducting the performance experiments. The study shows that the winding topology has a great importance especially for in-wheel motors.Publication Metadata only Artificial neural network-based model for estimating the produced power of a photovoltaic module(PERGAMON-ELSEVIER SCIENCE LTD, 2013) SAĞLAM, ŞAFAK; Mellit, A.; Saglam, S.; Kalogirou, S. A.In this paper, a methodology to estimate the profile of the produced power of a 50 Wp Si-polycrystalline photovoltaic (PV) module is described. For this purpose, two artificial neural networks (ANNs) have been developed for use in cloudy and sunny days respectively. More than one year of measured data (solar irradiance, air temperature, PV module voltage and PV module current) have been recorded at the Marmara University, Istanbul, Turkey (from 1-1-2011 to 24-2-2012) and used for the training and validation of the models. Results confirm the ability of the developed ANN-models for estimating the power produced with reasonable accuracy. A comparative study shows that the ANN-models perform better than polynomial regression, multiple linear regression, analytical and one-diode models. The advantage of the ANN-models is that they do not need more parameters or complicate calculations unlike implicit models. The developed models could be used to forecast the profile of the produced power. Although, the methodology has been applied for one polycrystalline PV module, it could also be generalized for large-scale photovoltaic plants as well as for other PV technologies. (C) 2013 Elsevier Ltd. All rights reserved.