Yazar "Canan, Belkis" seçeneğine göre listele

Listeleniyor 1 - 5 / 5
  • Küçük Resim Yok
    Öğe
    A borohydride/peroxide fuel cell-Li-ion battery hybrid system controlled with a maximum peak power tracking algorithm
    (Pergamon-Elsevier Science Ltd, 2015) Yilmaz, Eyup; Canan, Belkis; Sanli, Ayse Elif; Mat, Mahmut D.; Gunlu, Goksel
    The present study was carried out to develop a direct borohydride/peroxide fuel cell (DBPFC)/Li-ion battery hybrid system. In the system, the battery was charged with DBPFC. The output power of the DBPFC was controlled by a MPPT algorithm. It consists of two main parts: a DC/DC converter and a DSP controller. TMS320F28027 DSP was used to manage the entire MPPT circuit. The DC/DC controller was placed between the fuel cell and the battery. The performance test results indicated that the output power remained constant at 1.3 W during the test. Moreover, the voltage ripples that are generally observed in the fuel cells were prevented. The fuel cell provided the power at the maximum peak power for approximately 211 min. It was obvious that the Li-Ion battery was charged with a stable DBPFC power. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
  • Küçük Resim Yok
    Öğe
    Effects of power control techniques on hydrogen and oxygen evolution in direct borohydride peroxide fuel cells
    (Pergamon-Elsevier Science Ltd, 2017) Yilmaz, Eyup Semsi; Canan, Belkis; Gunlu, Goksel; Sanli, Ayse Elif
    Direct borohydride/peroxide fuel cells (DBPFCs) have some attractive features, such as high energy density, high theoretical cell power and low operational temperature. The drawbacks that cause performance loss include low efficiency and security challenges. Hydrogen and oxygen evolutions are major issues that should be considered when stacking a DBPFC. These gas evolutions significantly affect the DBPFC performance, efficiency and security. However, the gases were also produced in the case of an open circuit potential and depend on the applied voltage and current. Therefore, in the present study, the effects of cell loading on gas evolution were investigated. The DBPFC was operated under a constant voltage of 1.2 V and controlled using the maximum peak power tracking (MPPT) method. The MPPT control provided higher power generation and higher hydrogen evolution than observed using the constant voltage mode. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
  • Küçük Resim Yok
    Öğe
    Fuel Cell Powered Hybrid System Controlled by the Maximum Peak Power Tracking Technique
    (Ieee, 2015) Gordesel, Merve; Canan, Belkis; Gunlu, Goksel; Sanli, Ayse Elif
    In the present study a borohydride/peroxide fuel cell/Li-ion battery hybrid system was developed. Output power of DBPFC was controlled and kept constant by MPPT algorithm. The voltage ripples of the fuel cell were prevented. Moreover, Li-ion battery was charged with a stable power of direct borohydride/peroxide fuel cell.
  • Küçük Resim Yok
    Öğe
    Investigation of Hybrid Fuel Cell-Battery Systems
    (Electrochemical Soc Inc, 2015) Gunlu, Goksel; Aktepe, Alper; Canan, Belkis; Sanli, Ayse Elif
    Hybrid electric vehicles (HEV) are considered as the alternative propulsion systems. In the hybrid systems electrical storage component is the key element. Because size and weight of the battery defines the cost and performance of the overall system. Another major component of a hybrid system is the fuel cell system consisted of a fuel cell stack, a membrane humidifier and hydrogen storage canisters. The power management system (PMS) is a critical component of hybrid electric vehicles. The purpose of the PMS is to maintain the safety and reliability of the battery, state monitoring and evaluation, charge control, and cell balancing. Three light electric vehicles (LEV) equipped a fuel cell-battery hybrid power system have reviewed in the present work. The hybrid power systems reviewed have consisted of a proton exchange membrane (PEM) fuel cell, a lithium battery and a power management unit. They are Buddy El-Jet Hybrid Vehicle from Toyota, Hydrogen-Electric Hybrid Microcab H2EV Vehicle tested at CABLED project in England and Norwegian Buddy El-Jet Hybrid System.
  • Küçük Resim Yok
    Öğe
    Use of the Blacksea Water Containing Hydrogen Sulfide (H2s) as a Fuel Cell Fuel
    (Electrochemical Soc Inc, 2015) Sanli, Ayse Elif; Canan, Belkis; Aytac, Aylin
    Black Seawater is a hydrogen source because of high hydrogen sulfide (H2S) content. H2S is the chemical electron donor. Energy can be generated from H2S by the oxidation or by the electrooxidation. Electrochemical systems such as fuel cells are the powerful alternative to recovery of sulfur and to generate energy. In the present study Black seawater with H2S content has been investigated as a fuel cell fuel. The electrochemical behaviors of metal sulfides have been performed in the solution containing H2S. NiS has showed the catalytic effect towards the electro- oxidation of HS- ions. A fuel cell constructed with Ni anode and Pt cathode has provided the maximum power density of 23 mWcm(-2) at the potential of 300 mV and 75 mAcm(-2).