Stokiyometri Oranının İki Hücreli PEM Yakıt Hücresi Yığını Performansına Etkisinin İncelenmesi

Cellek, Muhammed Salih; Bilgili, Muhittin

doi:10.29109/gujsc.799620

Cited by 5 publications

(3 citation statements)

References 16 publications

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“…The energy need in the world is increasing day by day due to developing technology, increasing population and the search for continuous economic and industrial development (Cellek and Bilgili, 2021;Gonzatti and Farret, 2017;Hernández-Gómez et al, 2020). Today, the decrease in fossil energy sources such as oil and natural gas, which meet a large part of this need, and the increasing damage to the environment lead scientists to various alternative energy sources (Liu et al, 2023;Sadeghi et al, 2021;Wang et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

“…Contrary to the harmful emissions resulting from the combustion of fossil fuels, only water is formed as a by-product as a result of the reactions occurring in fuel cells. For this reason, fuel cells are seen as an environmentally friendly power source (Cellek and Bilgili, 2021). In addition, these devices have advantages such as high efficiency, quiet operation, fuel flexibility and low maintenance requirements.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the Effect of Operating Parameters on Nernst Voltage in Hydrogen-Oxygen Fuel Cells

Bilgili,

Gönülaçar

2024

Isı Bilimi Ve Tekniği Dergisi

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In hydrogen-oxygen fuel cells, operating parameters have an influence on the maximum expected open circuit (Nernst) voltage. Even though fuel cells have been the subject of many research, none of them have theoretically investigated the impact of various operating parameters, particularly concerning Nernst voltage and maximum thermodynamic efficiency. In this study, a computer program was developed to theoretically determine the effect of various operating parameters on the Nernst voltage in hydrogen-oxygen fuel cells. This computer program was developed in MATLAB to mathematically examine the effects of hydrogen and oxygen mole ratios, anode and cathode pressures, and operating temperatures on the maximum expected open circuit voltage. When calculating Nernst voltages and maximum thermodynamic efficiency for fuel cell reactions containing water as a by-product, the effects of higher heating value (HHV) and lower heating value (LHV) are also considered in the solutions. As a result, it was also concluded that temperature increase reduces the fuel cell Nernst voltage and maximum thermodynamic efficiency. Therefore, it was observed from the figures that the best conditions for the Nernst voltage occur when HHV is assumed, the temperature is 353 K, the mole ratios of hydrogen and oxygen are 1.0, the anode and cathode pressures are 5 atm and 6 atm, respectively. In terms of thermodynamic efficiency, it was determined that there was a maximum increase of 92.2% in the LHV assumption compared to the HHV assumption at the temperature of 1000 K, provided that other operating parameters were kept constant.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of the Effect of Operating Parameters on Nernst Voltage in Hydrogen-Oxygen Fuel Cells

Bilgili,

Gönülaçar

2024

Isı Bilimi Ve Tekniği Dergisi

Self Cite

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“…The results showed that the cell performance increases as the temperature value increases, the pressure does not have a great effect on the cell performance, however, the effect of temperature on performance is more apparent at high pressures. Cellek and Bilgili [ 12 ] conducted a numerical study to investigate the effect of stoichiometry ratio on fuel cell performance. For this purpose, numerical analyses were carried out for five different voltages and five different stoichiometry ratios in a two‐cell PEM fuel cell stack.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Effects of Working Conditions on Performance of Planar and Cylindrical Proton Exchange Membrane Fuel Cells

Cellek,

Demircan

2023

Global Challenges

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In this study, the effects of varying operating conditions on cell performance in cylindrical and planar PEM (Proton Exchange Membrane) fuel cells with equal geometrical properties are investigated numerically. For this purpose, planar and cylindrical fuel cells are analyzed and the changes in performance are compared with each other. In particular, by increasing the temperature from 363 to 373 K, the current density decreases by ≈50%. When the pressure is increased from 1 atm to 1.2 atm, the current density increases by 20% and 2% in cylindrical and planar fuel cells, respectively. When the stoichiometric ratio is increased from 1 to 1.5, the current density increases by 25% and 32% for cylindrical and planar fuel cells, respectively. However, it decreases slightly after 1.5 value of the stoichiometric ratio. As a result, it is seen that temperature has a more significant effect on fuel cell performance than other operating conditions. It can be said that the planar fuel cell can operate with more stable performance than the cylindrical fuel cell when the temperature and pressure are changed. However, in the case of changing the stoichiometric ratio, there is no significant difference in the operating performance of both fuel cells.

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NUMERICAL analysis of the effects of current collector plate geometry on performance in a cylindrical PEM fuel cell

Gunduz

Demircan

2022

International Journal of Hydrogen Energy

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Stokiyometri Oranının İki Hücreli PEM Yakıt Hücresi Yığını Performansına Etkisinin İncelenmesi

Cited by 5 publications

References 16 publications

Investigation of the Effect of Operating Parameters on Nernst Voltage in Hydrogen-Oxygen Fuel Cells

Investigation of the Effect of Operating Parameters on Nernst Voltage in Hydrogen-Oxygen Fuel Cells

Investigation of the Effects of Working Conditions on Performance of Planar and Cylindrical Proton Exchange Membrane Fuel Cells

NUMERICAL analysis of the effects of current collector plate geometry on performance in a cylindrical PEM fuel cell

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