Effect of electrodes separator-type on hydrogen production using solar energy

Sakr, I.M.; Abdelsalam, Ali M.; El‐Askary, W. A.

doi:10.1016/j.energy.2017.09.019

Cited by 21 publications

(6 citation statements)

References 23 publications

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“…Thus, to optimise the system, ideally, the zero-gap cell design, which is zero spacing between electrodes, can be employed. Practically, the closest distance achieved is 2mm between solid electrodes [21]. However, utilising porous mesh electrodes, the zero-gap cell design can also be achieved [22].…”

Section: • Electrolyte Resistancementioning

confidence: 99%

Hydrogen Production From Water Electrolysis Current Practice vs Sustainable Alternatives

Hannan¹,

Dao²,

Ahmed³

2022

AEJ

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Research and development on sustainable alternatives to fossil fuels have become a prime focus for the last couple of decades. Hydrogen, one of Earth's most abundant elements, holds great potential as a sustainable energy carrier. However, as Hydrogen is lighter than air, it does not exist in pure form in the atmosphere and is often found in compounds, such as water. The abundance of seawater in this regard makes Hydrogen an almost inexhaustible source of energy. Nevertheless, sustainable ways of extracting Hydrogen from water, dealing with its high corrosiveness and significantly lower evaporation point, still pose research challenges. Therefore, this paper aims at providing a comprehensive analysis of sustainable Hydrogen generation by focussing on the application of electrolysis to recover Hydrogen from water rather than using common reforming techniques. Different parameters affecting the efficiency and the overall performance of the electrolyser process have also been discussed and possible solutions to tackle the problems are presented. Later, a case study has been conducted to demonstrate the sustainable alternative for hydrogen production for an alkaline electrolyser using solar energy. MATLAB Simulink platform is used in this regard. This paper concludes that at an irradiation level of 1000W/m2, a PV array with 57 parallel strings with four modules connected in series per string is sufficient to provide enough power for the electrolyser to produce Hydrogen.

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Section: • Electrolyte Resistancementioning

confidence: 99%

Hydrogen Production From Water Electrolysis Current Practice vs Sustainable Alternatives

Hannan¹,

Dao²,

Ahmed³

2022

AEJ

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“…The PV cell efficiency PV η is defined as; [14], and el E is the electrical energy supplied to the electrolyzer, to produce the same amount of hydrogen.…”

Section: The Solar-hydrogen Systemmentioning

confidence: 99%

“…The experimental results of Mahrous et al [13] showed that the performance of water electrolyzer unit is highly affected by input voltage and the gap between the electrodes. Also, the effect of the separator material, separation distance and solution concentration on energy efficiency of alkaline water electrolyzer, were investigated by Sakr et al [14]. Higher system efficiency was gained at smaller gap distances between the pair of electrodes [13][14].…”

Section: Introductionmentioning

confidence: 99%

“…Also, the effect of the separator material, separation distance and solution concentration on energy efficiency of alkaline water electrolyzer, were investigated by Sakr et al [14]. Higher system efficiency was gained at smaller gap distances between the pair of electrodes [13][14]. Furthermore, the use of potassium hydroxide (KOH) as an electrolyte leaded to better hydrogen production.…”

Section: Introductionmentioning

confidence: 99%

“…The PV module voltage PV V is measured using DC Voltammeter CHY CY-33L with a range of 0-20 V and ± 0.3 -0.4 % accuracy. The current is measured using DC Ammeter CD771 with a range of 0-20 A and ± 2 % accuracy.The efficiency of the electrolyzer e η is defined in[14] as; is the energy content in the amount of hydrogen produced as defined by Sakr et al…”

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confidence: 99%

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Performance of Hydrogen Production Process Using Solar Energy

Sakr

Abdelsalam

El‐Askary

2018

The International Conference on Applied Mechanics and Mechanica

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The present experimental work is devoted to explore the efficiency of alkaline water electrolysis in producing hydrogen when it is operated by solar energy. The overall system efficiency is determined by measuring the solar irradiance as the source of the input energy, and the amount of hydrogen produced as the source of the output energy. Hence, the losses through the Photo-Voltaic (PV) cell, connecting wires, and the water electrolyzer, are all considered in the present study. Moreover, the effects of the gab width distance and the separators' types, on the overall system efficiency are also presented. It is found that, the higher the electrolyzer efficiency, the higher is the overall system efficiency at almost conditions. The significant reduction in system efficiency may be due to losses of the energy conversion through the PV cell and the electrical losses in the connecting wires. Though, the electrolyzer efficiency reaches 90% and the maximum overall system efficiency of 1.7% is barely achieved.

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