Operation characteristics of air-cooled proton exchange membrane fuel cell stacks under ambient pressure

“…The relations of cooling rate, average stack temperature and temperature distribution are important issues in fuel cell thermal management and control [44,45]. In this study, the number of temperature sensors inserted into the channels was limited, representing area coverage of 30 cm 2 per sensor from the total effective cooling area (240 cm 2 ) of a single cooling plate.…”

Section: Limitationsmentioning

confidence: 99%

Experimental thermal analysis on air cooling for closed-cathode Polymer Electrolyte Membrane fuel cells

Mohamed

Atan

2015

International Journal of Hydrogen Energy

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“…29 And the in-plane temperature difference of Cell 9 was much slighter than Cell 5. 30 With open-cathode configuration, the change of air stoichiometry has limited and slight impact on the reactant concentration. It can be seen that the PEMFC performance was affected by air flow rate as has been revealed in other studies.…”

Section: Temperature Uniformity At Steady Statementioning

confidence: 99%

“…It can be seen that the PEMFC performance was affected by air flow rate as has been revealed in other studies. 30 With open-cathode configuration, the change of air stoichiometry has limited and slight impact on the reactant concentration. 23,24 It is the temperatures under different air flow rates that influence the performance.…”

Section: Temperature Uniformity At Steady Statementioning

confidence: 99%

Cell and stack‐level study of steady‐state and transient behaviour of temperature uniformity of open‐cathode proton exchange membrane fuel cells

et al. 2019

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Summary The steady‐state temperature uniformity and thermal transients of open‐cathode proton exchange membrane fuel cell (PEMFC) at cell and stack level are researched experimentally in this study. The local temperatures are obtained by 30 thermocouples contacting the surfaces of cathode gas diffusion layers (GDL). The s temperature homogeneity under different load currents and air flow rates are investigated. The results reveal that the fluctuation of temperature distribution under different currents is small under the lowest air flow rate set in the experiments. Comparatively, the temperature is less uniform when the load current is higher under other air flow rates. The evaluation indicator, temperature uniformity index (TUI), varies nearly linearly with the current. And the maximum variation is 55.6% to 59.0%. This distinct behaviour is probably related to the existence of liquid water and its nonuniform distribution which can enlarge the temperature difference at high current. With respect to thermal transients, there is rapid deterioration in temperature uniformity when the load current is stepped up. It may arise from the uneven liquid water distribution which can lead to different temperature variation rates. Further, the research gives direction for optimization of cooling strategy and thermal management of open‐cathode PEMFC stack in application.

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Operation characteristics of air-cooled proton exchange membrane fuel cell stacks under ambient pressure

Cited by 54 publications

References 41 publications

Performance analysis of 5 kW PEMFC-based residential micro-CCHP with absorption chiller

Performance analysis of 5 kW PEMFC-based residential micro-CCHP with absorption chiller

Experimental thermal analysis on air cooling for closed-cathode Polymer Electrolyte Membrane fuel cells

Cell and stack‐level study of steady‐state and transient behaviour of temperature uniformity of open‐cathode proton exchange membrane fuel cells

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