Papers by Ibrahim BULDU
Gazi Mühendislik Bilimleri Dergisi, 2021
In this study, the working principle, components and connection types of the solar cell and the e... more In this study, the working principle, components and connection types of the solar cell and the equivalent circuit model extraction were examined. The mathematical equations of the photovoltaic (PV) solar cell module general equivalent circuit model were adapted to the MATLAB software. An interface was created in the MATLAB GUI environment using the Newton-Raphson method to solve the current equation of the solar cell. The model used also includes changing environmental conditions such as solar radiation and temperature. With the interface created, the user; can quickly obtain Current-Voltage (I-V) and Power-Voltage (P-V) curves by changing parameters such as radiation, temperature, series resistance, ideality factor and number of cells connected in series-parallel. In this study, characteristic curves were obtained by using different parameters for the solar panel data of two other manufacturers. In addition, the user can quickly get values such as maximum current (Imp), maximum voltage (Vmp), maximum power (Pmp), input power (Pin), filling factor (FF) and efficiency (η) by entering the variable values of the photovoltaic cell through this interface. In this way, an interface that provides convenience to the user has been developed for those working in this field.
Thesis Chapters by Ibrahim BULDU
In this thesis study, it is aimed to cover the surface of Ti-based materials with Ag by using new... more In this thesis study, it is aimed to cover the surface of Ti-based materials with Ag by using new
experimental processes with cold substrate technique and to examine the TiO2-Ag binary
structure. Titanium and its alloys (Ti-6Al-4V) are generally preferred due to their stable
structure, high strength/weight ratios, high corrosion resistance, processability and
biocompatibility in a wide range of applications. Thin film formation process is realized by
soliton growth mechanism in the cold substrate technique used in this thesis. The most
important feature of the soliton mechanism is the coating of the surface with equal size nano
particles. Silver ions were preferred which are used especially in the photoelectronic technology
also in the health field due to its antibacterial properties as coating material. The morphological
and structural properties of the samples were examined after preparation of Ag coated samples
at the substrate temperature of 100-300 K with specially prepared apparatus. It was determined
from the X-ray diffraction patterns where Ag layers were grown in cubic structure and the
intensity of Ag structure peaks increased as the substrate temperature decreased. Parallel to this,
energy dispersive X-ray spectroscopy measurements was determined where the amount of Ag
coated increased as the substrate temperature decreased. As the substrate temperature decreases,
scanning electron microscope measurements showed that the particle sizes decreased in the Ag
layers and the Ag films prepared in the 100-200 K temperature range were coated in equal sized
nano particles. Higher corrosion resistance was observed in this temperature range, the coatings
which has grown. On the other hand, nano-sized Ag coatings obtained in the 100-200 K
temperature zone showed a decrease in the hardness value as expected.
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Papers by Ibrahim BULDU
Thesis Chapters by Ibrahim BULDU
experimental processes with cold substrate technique and to examine the TiO2-Ag binary
structure. Titanium and its alloys (Ti-6Al-4V) are generally preferred due to their stable
structure, high strength/weight ratios, high corrosion resistance, processability and
biocompatibility in a wide range of applications. Thin film formation process is realized by
soliton growth mechanism in the cold substrate technique used in this thesis. The most
important feature of the soliton mechanism is the coating of the surface with equal size nano
particles. Silver ions were preferred which are used especially in the photoelectronic technology
also in the health field due to its antibacterial properties as coating material. The morphological
and structural properties of the samples were examined after preparation of Ag coated samples
at the substrate temperature of 100-300 K with specially prepared apparatus. It was determined
from the X-ray diffraction patterns where Ag layers were grown in cubic structure and the
intensity of Ag structure peaks increased as the substrate temperature decreased. Parallel to this,
energy dispersive X-ray spectroscopy measurements was determined where the amount of Ag
coated increased as the substrate temperature decreased. As the substrate temperature decreases,
scanning electron microscope measurements showed that the particle sizes decreased in the Ag
layers and the Ag films prepared in the 100-200 K temperature range were coated in equal sized
nano particles. Higher corrosion resistance was observed in this temperature range, the coatings
which has grown. On the other hand, nano-sized Ag coatings obtained in the 100-200 K
temperature zone showed a decrease in the hardness value as expected.
experimental processes with cold substrate technique and to examine the TiO2-Ag binary
structure. Titanium and its alloys (Ti-6Al-4V) are generally preferred due to their stable
structure, high strength/weight ratios, high corrosion resistance, processability and
biocompatibility in a wide range of applications. Thin film formation process is realized by
soliton growth mechanism in the cold substrate technique used in this thesis. The most
important feature of the soliton mechanism is the coating of the surface with equal size nano
particles. Silver ions were preferred which are used especially in the photoelectronic technology
also in the health field due to its antibacterial properties as coating material. The morphological
and structural properties of the samples were examined after preparation of Ag coated samples
at the substrate temperature of 100-300 K with specially prepared apparatus. It was determined
from the X-ray diffraction patterns where Ag layers were grown in cubic structure and the
intensity of Ag structure peaks increased as the substrate temperature decreased. Parallel to this,
energy dispersive X-ray spectroscopy measurements was determined where the amount of Ag
coated increased as the substrate temperature decreased. As the substrate temperature decreases,
scanning electron microscope measurements showed that the particle sizes decreased in the Ag
layers and the Ag films prepared in the 100-200 K temperature range were coated in equal sized
nano particles. Higher corrosion resistance was observed in this temperature range, the coatings
which has grown. On the other hand, nano-sized Ag coatings obtained in the 100-200 K
temperature zone showed a decrease in the hardness value as expected.