On the Performance of Hybrid PV/Unitized Regenerative Fuel Cell System in the Tropics

Dihrab, Salwan S.; Khatib, Tamer; Sopian, Kamaruzzaman; Al-Ani, Habeeb; Zaidi, Saleem H.

doi:10.1155/2012/942784

Cited by 4 publications

(5 citation statements)

References 16 publications

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“…It is extremely important to consider this factor in designing any PV system as it may cause a serious undersizing problem. According to [20][21][22][23][24][25], the average performance factor of PV systems in the selected testing field is about 67.2%. This result is further supported by this research, whereas the average performance factor of the tested module is found to be about 63.4%.…”

Section: Discussionmentioning

confidence: 99%

Simplified I-V Characteristic Tester for Photovoltaic Modules Using a DC-DC Boost Converter

2017

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Abstract:In this paper, an efficient testing system for measuring a PV module's I-V curve is proposed. The proposed system is based on a controlled DC-DC boost converter. The advantage of using a DC-DC converter is that this converter is typically used in PV systems to track the maximum power point and to control the charging of the battery. Consequently, this device is utilized for I-V curve extraction without the need for further external devices. The I-V curve is extracted by modifying the duty cycle of the triggering signal of the boost converter's switch. The proposed system has been tested experimentally using a 120 Wp PV module. The results show that the proposed system can successfully extract I-V curves of PV module. Notably, the performance of the tested module, as measured by this study's system as well as with a reference system, was found to be in the range of 61-67% of the performance given in the datasheet. Hence, this result highlights the importance of considering a measurement of the actual performance of PV modules when designing any PV system so as to avoid an undersized system. The proposed I-V testing system can be used as a simple tool to diagnose any shortages or low performance problems in PV system.

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Section: Discussionmentioning

confidence: 99%

Simplified I-V Characteristic Tester for Photovoltaic Modules Using a DC-DC Boost Converter

2017

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“…The electrical performance, gas production, work efficiency, operation stability, and cycle life are important parameters to measure the performance of cells and fuel cell stacks. A number of scholars have conducted experimental studies on the electrical performance , and gas production volume , of the single cell, and studies showed that the increase of electrolytic voltage and current density was conducive to the increase of the gas production volume of the electrolytic cell mode . The solid–liquid and gas–liquid interfaces in PEMFCs were studied, which indicated that the liquid water inside the PEMFC had a great impact on the fuel cell.…”

Section: Introductionmentioning

confidence: 99%

“…A number of scholars have conducted experimental studies on the electrical performance 2,3 and gas production volume 4,5 of the single cell, and studies showed that the increase of electrolytic voltage and current density was conducive to the increase of the gas production volume of the electrolytic cell mode. 4 The solid− liquid and gas−liquid interfaces in PEMFCs were studied, 6 which indicated that the liquid water inside the PEMFC had a great impact on the fuel cell. Proton exchange membrane (PEM) ECs were often used in combination with solar power systems as an important part of energy storage and oxygen production equipment.…”

Section: Introductionmentioning

confidence: 99%

Variation of Two-Phase Species Distribution inside a Unitized Regenerative Fuel Cell during an Electrolytic Cell Mode

Guo

et al. 2023

Energy Fuels

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A three-dimensional electrolytic cell model coupling the two-phase mass transportation behaviors in the unitized regenerative fuel cell is established. This simulation work mainly studies the distribution rule of species inside the electrolytic cell and analyzes the liquid water saturation in inlet and working voltage, respectively. The results show that the high saturation of liquid water at the inlet can increase the oxygen concentration in the catalytic layer on the oxygen side, and the oxygen concentration gradually reduces following the direction of the catalytic layer to the gas channel, and the oxygen concentration is increased with the direction from the inlet to outlet. When the cell voltage increases from 1.35 to 1.95 V, from the catalytic layer to the gas channel, the change rate of liquid water saturation increases from 0.38 to 12.89%, the change rate of hydrogen concentration increases from 0.37 to 1.70%, and the change rate of oxygen concentration decreases from 90.48 to 80.48%. It is concluded that with the increase of electrolytic cell voltage, the gas production rate increases. On the hydrogen electrode side, the high gas yield makes it easier for hydrogen discharge from the cell.

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“…Besides, the URFC has been investigated for space applications 6,7 and hybrid power systems. 8,9 Up to now, abundant works on URFCs have been done. However, much attentions have been paid to catalyst, 10,11 bifunctional electrode, 12,13 gas diffusion layer, 14,15 and bipolar plate.…”

Section: Introductionmentioning

confidence: 99%

“…To promote the practical applications, URFC stacks have been developed. Besides, the URFC has been investigated for space applications and hybrid power systems . Up to now, abundant works on URFCs have been done.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on two-phase flow in a unitized regenerative fuel cell during mode switching from water electrolyzer to fuel cell

et al. 2018

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Summary Mode switching between fuel cell and water electrolyzer of a unitized regenerative fuel cell alters two‐phase flow dynamics in the channels. To fully understand the mode switching, the observation of two‐phase flow is necessary. In this work, experiments are conducted to investigate the two‐phase flow in the flow field of a unitized regenerative fuel cell during mode switching. A transparent window is assembled at the oxygen side to allow a direct view of the serpentine flow field. The two‐phase flow are captured by a high‐speed camera. Water has a significant effect on the mode switching. The switching from water electrolyzer to fuel cell is difficult because of the flooding problem. High temperature causes insufficient water in water electrolyzer mode without water supply and membrane dehydration in fuel cell mode. The voltage in fuel cell mode decreases more rapidly with fuel cell current density during mode switching.

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On the Performance of Hybrid PV/Unitized Regenerative Fuel Cell System in the Tropics

Cited by 4 publications

References 16 publications

Simplified I-V Characteristic Tester for Photovoltaic Modules Using a DC-DC Boost Converter

Simplified I-V Characteristic Tester for Photovoltaic Modules Using a DC-DC Boost Converter

Variation of Two-Phase Species Distribution inside a Unitized Regenerative Fuel Cell during an Electrolytic Cell Mode

Experimental investigation on two-phase flow in a unitized regenerative fuel cell during mode switching from water electrolyzer to fuel cell

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