Experimental study on the start-up with dry gases from normal cell temperatures in self-humidified proton exchange membrane fuel cells

Kong, Im Mo; Jung, Aeri; Kim, Beom Jun; Baik, Kyung Don; Kim, Min Soo

doi:10.1016/j.energy.2015.09.014

Cited by 20 publications

(5 citation statements)

References 39 publications

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“…Hydrogen crossover is the diffusion of hydrogen from the anode to the cathode through the membrane which occurs faster than the diffusion of other gases. Several groups [8][9][10][11] have investigated the effect of hydrogen crossover. Hydrogen crossover has at least three negative effects on fuel cell operation: fuel efficiency reduction, cathode potential depression, and aggressive peroxide radical formation [12].…”

Section: Introductionmentioning

confidence: 99%

Local resolved investigation of hydrogen crossover in polymer electrolyte fuel cell

Jing

Gazdzicki

Lin

et al. 2017

Energy

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In this study, the effects of temperature, pressure and relative humidity (RH) on hydrogen crossover rate from anode to cathode of a PEMFC is investigated.Segmented cells are used to measure the local hydrogen crossover current density (j cross H2 ) distribution. The results present approximate linear increase of the hydrogen crossover rate with increasing temperature and hydrogen back pressure with rates of 0.038 mA cm -2 K -1 and 3.33 mA cm -2 bar -1 , respectively. Generally, slightly increased H 2 crossover is observed in gas inlet areas than cell average. Unlike the approximate linear relationship between temperature or pressure with hydrogen crossover, the effect of relative humidification on hydrogen crossover is more complex with different increasing rate before fully humidification and dramatic decline at excessive humidification. It is demonstrated that segmented cells can be advantageously applied to study local H 2 crossover of intact MEAs.

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Section: Introductionmentioning

confidence: 99%

Local resolved investigation of hydrogen crossover in polymer electrolyte fuel cell

Jing

Gazdzicki

Lin

et al. 2017

Energy

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“…Another promising gas species for gas mass balancing is O 2 , which is also not produced in the fuel cell but is partly consumed during the ORR. Therefore, this current-based oxygen consumption was taken into account using Equation (7) and is considered in all the presented results.…”

Section: Resultsmentioning

confidence: 99%

“…The oxygen ratio is adjusted by the cathode air compressor mass flow and commonly set to values well above one so that sufficient fuel is supplied, and the water produced is transported out of the fuel cell, preventing the membrane from drying out. By combining and modifying Equations ( 6) and (7) and by making the additional correlations for mixtures of ideal gases, the cathode oxygen ratio is calculated as…”

Section: Modelmentioning

confidence: 99%

“…External reactant humidification upstream of the fuel cell reactant inlet can help to ensure appropriate membrane humidification, allowing higher fuel cell operating temperatures. This external humidification, however, also increases the system complexity and packaging volume [7]. In general, the thermal management of the fuel cell has a significant influence on the water management, since the ability of a gas mixture to absorb water vapor is determined by its temperature.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the Proton Exchange Membrane Fuel Cell System Cathode Exhaust Gas Composition Based on Test Bed Measurements

Reithuber,

Frühwirth,

Buchberger

et al. 2023

Energies

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Proton exchange membrane fuel cells are gaining increasing importance in vehicle applications. The exhaust gas composition regarding the water and oxygen content and the mass flow are important parameters in fuel cell research (e.g., for designing the test bed, quantifying the hydrogen loss in the exhaust, performing experiments with air pollutants, and monitoring degradation). The exhaust gas composition is also important for vehicle applications (e.g., ensuring safe hydrogen levels in the exhaust). Performing direct measurements of the exhaust mass flow and the relative humidity is challenging due to the high-humidity environment. This article presents a mathematical thermodynamic model used to calculate the exhaust gas mass flow and relative humidity, validated by balancing the gas species composition between cathode inlet and exhaust and by using data measured at the fuel cell system test bed. Four calculation model variations and their analyses are discussed. Furthermore, the exhaust gas composition throughout the fuel cell system operating range is presented. The results of air pollutant experiments provide comprehensive examples for the application of the calculation model. These results demonstrate the suitability of the model for its application in fuel cell system research.

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“…Restoration methods assist to increase the life time. Kong, et al [21] reported start up characteristics of gas cells. Start-up characteristics were analyzed at different circulation arrangements, mainly co-flow and counter flow, counter circulation arrangement has terrific starting point up characteristics.…”

Section: Experimental Investigationsmentioning

confidence: 99%

Latest Trends and Challenges In Proton Exchange Membrane Fuel Cell (PEMFC)

Jourdani¹,

Mounir²,

Marjani³

2017

TOEFJ

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Background: During last few years, the proton exchange membrane fuel cells (PEMFCs) underwent a huge development. Method: The different contributions to the design, the material of all components and the efficiencies are analyzed. Result: Many technical advances are introduced to increase the PEMFC fuel cell efficiency and lifetime for transportation, stationary and portable utilization. Conclusion: By the last years, the total cost of this system is decreasing. However, the remaining challenges that need to be overcome mean that it will be several years before full commercialization can take place.This paper gives an overview of the recent advancements in the development of Proton Exchange Membrane Fuel cells and remaining challenges of PEMFC.

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Experimental study on the start-up with dry gases from normal cell temperatures in self-humidified proton exchange membrane fuel cells

Cited by 20 publications

References 39 publications

Local resolved investigation of hydrogen crossover in polymer electrolyte fuel cell

Local resolved investigation of hydrogen crossover in polymer electrolyte fuel cell

Investigation of the Proton Exchange Membrane Fuel Cell System Cathode Exhaust Gas Composition Based on Test Bed Measurements

Latest Trends and Challenges In Proton Exchange Membrane Fuel Cell (PEMFC)

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