Yazar "Demirel, H." seçeneğine göre listele
Listeleniyor 1 - 10 / 10
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Comparison of PSO-PID, FLC and PID in a circulating fluidized bed boiler(2011) Aygun, H.; Demirel, H.Bed temperature is one of the most important parameters in a circulating fluidized bed boiler. Because combustion efficiency increases with rising of bed temperature and also harmful emissions are affected by bed temperature. Classical PID controller can't give fast response to instant changes in boiler. So modern control methods must be used for bed temperature control of circulating fluidized bed boiler. In this study PSO-PID (Particle Swarm Optimization based PID), FLC which are modern controllers, and classical PID controller are used for controlling bed temperature of a circulating fluidized bed boiler and they are compared. Simulation results show that settling time in PSO-PID controller is lower than the other controllers. PSO-PID decreases overshoot like FLC but in classical PID controller overshoots are the biggest. In FLC there are no overshoot. So if overshoot isn't wanted, a FLC must be used and if short settling time is wanted, a PSO-PID controller must be used. © 2011 Chamber of Turkish Electric.Öğe Design of a universal thermoelectric module test system for testing rat brain thermoelectric hypothermia(Inst Engineering Technology-Iet, 2007) Demirel, H.; Ciylan, B.; Erkal, B.; Yilmaz, S.A universal microcontroller test system, which aims to determine the parameters of thermoelectric modules under various thermal loads, has been designed and realised using a novel test method. The test system has been designed according to a more simplified form of the present formula set, which has been made to accept minimum variables as the input in order to obtain more precise results. It measures all the parameters of a working thermoelectric module by measuring only the hot-side temperature, module operation voltage, current and thermal voltage values of the module. The new test system has been used to measure a standard thermoelectric module (Melcor CP 1.4-127-10L) in order to verify its performance. It has also been used to test the operation of an experimental medical apparatus, which is used to induce hypothermia (low body temperature) in the brains of rats using a thermoelectric module.Öğe Determining the optimal parameters of a hybrid microgrid for supplying the University of Kirkuk in Iraq(Institute of Electrical and Electronics Engineers Inc., 2024) Falih, H.M.; Demirel, H.; Al-Bayaty, H.The gap between the electrical power demand and the available power supply keeps widening in Iraq due to the occurrence of reduction of natural gas supply. That causes repeated power outages in many districts in the country. Adding to that sustainability issue, the problem of emission of greenhouse gases that boost climate change is the most common. Worldwide now. Combining renewable energy sources (RES) with energy storage can play the role of a feasible alternative to fossil fuel-based energy sources. Many studies in the literature presented the design, optimization, and evaluation of the feasibility of grid-connected microgrid systems technically and economically. However, there is still a clear gap in knowledge that might void the obtained results of all this conducted research in the case of power outage conditions. This study aims to determine the optimum system parameters and component sizing to consider what to do in power outage conditions. This guarantees a feasible solution technically, economically, and environmentally at the time of normality and when the grid goes down. Finding a solution to fill this gap, this research utilizes the merits of the Homor Pro software, engineering its design parameters, creating smart search spaces to design a microgrid composed of PV, battery energy storage, and diesel generator to supply the load demand of the University of Kirkuk in Iraq. The aim is to calculate the optimum size of each energy system component to find the most profitable solution, zero unmet demand, and the minimum CO2 emission at normal and outage conditions. To achieve that, the designed system used real-time meteorological data from the university site to find out the optimum parameters to realize the technical and economical optimization. © 2024 IEEE.Öğe An FPGA based robot controller design and implementation(Kaunas Univ Technology Press, 2015) Erkol, H. O.; Demirel, H.In this study, a co-processor for six-legged robot is designed and implemented. Kinematic calculations are complicated and many times we need a separate computation unit when we need high accuracy and precision. Co-processor usage is widespread for decreasing the load on the main computation unit. The co-processor designed in this study is specialized for servo motors controlled via serial port. The co-processor takes and sends the command via serial port. It can compute the joint angels of an 18 degree of freedom (DOF) six-legged robot in real time. The experimental studies are made by computer and on a robot prototype and taken good results.Öğe An FPGA based robot controller design and implementation(Kaunas University of Technology, 2015) Erkol, H.O.; Demirel, H.In this study, a co-processor for six-legged robot is designed and implemented. Kinematic calculations are complicated and many times we need a separate computation unit when we need high accuracy and precision. Co-processor usage is widespread for decreasing the load on the main computation unit. The co-processor designed in this study is specialized for servo motors controlled via serial port. The co-processor takes and sends the command via serial port. It cancompute the joint angels of an 18 degree of freedom (DOF) six-legged robot in real time. The experimental studies are made by computer and on a robot prototype and taken good results.Öğe Integration of Quadrature Oscillator and Floating Inductor in FinFET Transistor Design: Innovations and Applications(Iran University of Science and Technology, 2023) Mohammed, A.A.; Demirel, H.In the past twenty years, low-voltage and power design have gained attention in analog VLSI design, particularly for high-performance and portable integrated circuits (ICs). Because of the increasing density of large-scale integration, a single silicon A.S.I. chip could have thousands or even millions of transistors on it. A rise in integration levels led to the development of Fin-type Field Effect Transistor (FinFETs) technology. In this research, an improved circuit design for a floating active inductor (FAI) and quadrature sinusoidal oscillator (QSO) is implemented employing only two active filters, the Z-copy-Voltage Differential Transimpedance Amplifier (Zc-VDTA). The purpose of the FAI is to contain two Zc-VDTA and one resistor with a ground capacitor, and it is easy to integrate the parameters of the Zc-VDTA bias current (IB) through the adjustment of the circuit. To verify the dependability of the circuits designed using floating active inductance circuits, a Butterworth fourth-order low-pass filter was created via component replacement. All the simulations have been carried out on 7 nm using linear technology SPICE, and cadence virtuoso tool. © 2023, Iran University of Science and Technology. All rights reserved.Öğe Multi-criterion design and 2D cosimulation model of 4 kW PM synchronous generator for standalone run-of-the-river stations(Institute of Electrical and Electronics Engineers Inc., 2015) Cetinceviz, Y.; Uygun, D.; Demirel, H.This study reports the analytical computation including performance characteristics such like load line voltage and output power in combination with coupled-field circuit analysis of a 4kW direct drive permanent magnet synchronous generator (PMSG) to be used in a micro-scale run-of-the-river-station application. The specifications such like slot opening, pole embrace and magnet length of PMSG are optimized by using parametric approach including multi-criterion design optimization. Based on the optimized design, the model has been exposed to some transient coupled-field circuit analyses based on variable river flow speed and variable ohmic load conditions. The analytical studies related to finite element methods and conducted parametric approaches verified the effectiveness of the employed dynamic co-simulations. © 2015 IEEE.Öğe On-off controller design for a portable refrigerator(Kaunas Univ Technology Press, 2015) Cosgun, A. E.; Demirel, H.The paper presents a design of control system for a portable refrigerator. Mechanic and software design of the system was realized for this purpose. To do this project a small metal box which has rectangular prism shape was used. Desired temperature value was provided one button. Up side of button increases temperature value, the opposite side decreases temperature values. To controlling temperature, there is a peltier which is provided cooling. Its usage is considerably easy because the temperature value is controlled by the current over the Arduino microcontroller card. It generate PWM signal to on-off control of peltier.Öğe On-off controller design for a portable refrigerator(Kaunas University of Technology, 2015) Cosgun, A.E.; Demirel, H.The paper presents a design of control system for a portable refrigerator. Mechanic and software design of the system was realized for this purpose. To do this project a small metal box which has rectangular prism shape was used. Desired temperature value was provided one button. Up side of button increases temperature value, the opposite side decreases temperature values. To controlling temperature, there is a peltier which is provided cooling. Its usage is considerably easy because the temperature value is controlled by the current over the Arduino microcontroller card. It generate PWM signal to on-off control of peltier.Öğe Optimal design and verification of a PM synchronous generator for wind turbines(International Journal of Renewable Energy Research, 2017) Cetinceviz, Y.; Uygun, D.; Demirel, H.This study reports the analytical computation including performance characteristics under no-load condition in combination with coupled 2D electromagnetic field-circuit analysis of a 4kW direct drive permanent magnet synchronous generator (PMSG) to be used in micro-scale wind turbine applications. The specifications such like stack length, skew and magnet offset of PMSG are optimized by using parametric approach including multi-objective design optimization. It describes the methodology to gain required output performance such as output power, load voltage and maximum efficiency of the wind generator. Based on the optimized design, the model has been exposed to some transient coupled-field circuit analyses based on variable wind flow speed under no-load conditions. In addition to these evaluations; the experimental results verified the effectiveness of the employed simulations model related to finite element methods and analytical studies showing that that the induced voltage at nominal speed and no-load condition is at desired level and results obtained under no-load condition are in good agreement with the analysis and analytical results.
