A parametric comparison of temperature uniformity and energy performance of a PEMFC having serpentine wavy channels

Jia, Yuxin; Sundén, Bengt; Xie, Gongnan

doi:10.1002/er.4327

Cited by 31 publications

(10 citation statements)

References 31 publications

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“…The uniformity temperature distribution will have a great impact on the performance of fuel cells, the Joule heat and reaction heat generated inside the fuel cell during operation can lead to uneven temperature distribution, even local high temperature generated. 2,8 If the local temperature exceeds 100 C, high temperature steam makes the film break, leading to direct contact between hydrogen and oxygen, which may lead to explosion. Too large the temperature difference on the membrane, the generated thermal stress leads to the deformation of the proton exchange membrane and the falling off of platinum particles on the catalytic layer.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of cooling flow field of proton exchange membrane fuel cell based on heat transfer performance enhancement

Deng

Liu

Zhou

et al. 2022

Intl J of Energy Research

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Proton exchange membrane fuel cell (PEMFC) generates a lot of heat during power generation. It is necessary to control PEMFC to operate at proper temperature through effective thermal management. CFD model of flow field plates with different structures is established; the heat transfer performance of different flow fields was analyzed by numerical simulation. The index of uniformity temperature (IUT) was introduced to further evaluate the heat transfer effect. The results showed that the parallel flow field was not suitable for cooling due to its poor performance at high coolant flow rate. The pressure difference of serpentine flow field was more than 10 times that of other flow fields, which lead to the highest cost in practical cooling application. The wave flow field with the best comprehensive cooling effect at high flow velocity, and the average temperature and IUT were 2.22% and 37.97% lower than the parallel flow field, respectively. The cooling effect of point flow field followed the second, and its average temperature and IUT were 1.65% and 29.71% lower than those of parallel flow field, respectively. In practice application, the wavy flow field showed better heat transfer performance within the required coolant flow range.

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Section: Introductionmentioning

confidence: 99%

Evaluation of cooling flow field of proton exchange membrane fuel cell based on heat transfer performance enhancement

Deng

Liu

Zhou

et al. 2022

Intl J of Energy Research

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“…1 The PEMFCs generally show high electrochemical performance in high relative humidity (RH) operating conditions and are utilized in fuel cell electric vehicles. 2 However, fully humidified conditions are not recommended, because excessive water vapor leads to condensation. Studies have shown uniform and high performance in 70% RH conditions, but irregular performance due to condensation under highly humidified conditions.…”

Section: Introductionmentioning

confidence: 99%

Carbon nanotube‐deposited layer on cathodic catalyst layer in polymer electrolyte membrane fuel cell for enhanced performance in low humidity condition

Jeong

Kwon

Kim

et al. 2022

Intl J of Energy Research

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Summary An ultrathin layer composed of carbon nanotubes (CNTs) was deposited on the cathodic catalyst layer to boost performance of polymer electrolyte membrane fuel cell (PEMFC) under low to mid relative humidity (RH) conditions. The CNT‐deposited layer (CDL) was formed without modifying the PEMFC components. To investigate the behavior of water and reactants at the inner interface of the membrane electrode assembly (MEA), we characterized the morphology of the CDL (contact angle, pore size distribution, specific surface area, field emission scanning electron microscopy, and energy dispersive spectroscopy images). The CDL in PEMFCs was used as a contributor to enhance the membrane hydration. Thereby performances have been significantly enhanced. Additionally, the three‐dimensional nanostructure of the CDL expanded the active area by uniform dispersion of the reactants. The polarization curves of the conventional MEA and MEA with CDL were evaluated under diverse RH (100%, 70%, 50%, and 30% RH). In the low to mid RH conditions, the maximum power densities were increased by 29.7% (70% RH), 26.6% (50% RH), and 25.5% (30% RH) compared with the conventional MEA. Especially, the maximum power density of the MEA with CDL (0.547 W/cm2 at 70% RH) was higher than that of the conventional MEA (0.482 W/cm2 at 100% RH). Thus, MEA with CDL demonstrated excellent performance enhancement under low to mid RH conditions.

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“…Polymer electrolyte membrane fuel cell (PEMFC) is regarded as an ideal power source for vehicles because of its high energy conversion efficiency, high energy density, and zero‐emission 1‐5 . In the past few decades, PEMFC has made breakthroughs in terms of mileage, system life, and cost 6‐10 .…”

Section: Introductionmentioning

confidence: 99%

Analysis of the cold start behavior of a polymer electrolyte membrane fuel cell in constant power start‐up mode

Niu

Wang

et al. 2021

Int J Energy Res

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Summary Cold start is one of the urgent problems to be solved in the process of commercialization for the polymer electrolyte membrane fuel cell (PEMFC). In this study, cold start processes under constant power start‐up are simulated with a three‐dimensional transient model. Evolutions of voltage and current density under higher and lower current density under this mode are elucidated. The water accumulation location in the PEMFC is analyzed and effects of important parameters on the process of cold start are quantified under constant power start‐up mode. The results show that the current density first increases and then decreases when the PEMFC starts from a higher current density under constant power start‐up mode, while it is reversed when the PEMFC starts from a lower current density. Ice first appears in the area near the membrane under the channel and the hottest area in the cell also appears below the channel. At the lower current density, the distribution of water in ionomer is more uniform. Under two different starting current densities, the changing trends of the conductivity of the membrane and the anode catalyst layer are different. The activational heat is the largest heat source in the cold start process under constant power start‐up mode and the utilization of ionomer water storage is higher when the PEMFC starts from a lower current density. The temperature of the inlet gas is most sensitive to the cold start process at lower current density. And initial content of membrane water and membrane thickness have important impacts on the cold start performance when PEMFC starts from a higher current density due to the redistribution of potential.

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A parametric comparison of temperature uniformity and energy performance of a PEMFC having serpentine wavy channels

Cited by 31 publications

References 31 publications

Evaluation of cooling flow field of proton exchange membrane fuel cell based on heat transfer performance enhancement

Evaluation of cooling flow field of proton exchange membrane fuel cell based on heat transfer performance enhancement

Carbon nanotube‐deposited layer on cathodic catalyst layer in polymer electrolyte membrane fuel cell for enhanced performance in low humidity condition

Analysis of the cold start behavior of a polymer electrolyte membrane fuel cell in constant power start‐up mode

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