Experimental and numerical investigation of obstacle effect on the performance of PEM fuel cell

Ebrahimzadeh, A.A.; Khazaee, Iman; Fasihfar, Ahmad

doi:10.1016/j.ijheatmasstransfer.2019.07.034

Cited by 54 publications

(18 citation statements)

References 25 publications

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“…Seen from Figure 5A‐C, the maximum velocity of side blockage flow field was up to 1.577 m s −1 , while the straight and side blockage alternating with straight flow channels were 0.426 and 1.270 m s −1 . Increasing flow rate and disturbance in the flow field could elevate the mass transfer capacity of PEMFC, which had been confirmed in previous work and many literatures 30,38 . Moreover, there was no obvious dead zone in the flow channel compared to top blocked flow channel.…”

Section: Resultssupporting

confidence: 75%

“…Increasing flow rate and disturbance in the flow field could elevate the mass transfer capacity of PEMFC, which had been confirmed in previous work and many literatures. 30,38 Moreover, there was no obvious dead zone in the flow channel compared to top blocked flow channel. The side blockages reduced the impact of vertical pressure variation on the proton exchange membrane, and the above mentioned factors would be beneficial for cell performance.…”

Section: Velocity Fieldmentioning

confidence: 96%

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Enhancement effects of the side blockage arrangement in the flow channel on the performance of a proton exchange membrane fuel cell

Shen

Yan

et al. 2022

Intl J of Energy Research

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Summary Flow field configuration critically affects the heat and mass transfer process in a proton exchange membrane fuel cell (PEMFC), which is a key factor to ensure efficient and stable operation of fuel cells. Side blockages arranged in the cathode flow channel is proposed for performance improving of PEMFC. Conventional straight, side blockage alternating with straight, side blockage flow channels are studied to analyze the effects of side blockages arrangement on the distribution of velocity, temperature, reactant concentration and water content and the performance of PEMFC. Results show that the O2 mole concentration in the flow field could be increased by the presence of side blockages, thus the convective mass transfer coefficient and performance are both improved. At current density of 2.0 A cm−2, the performance of PEMFC increases by 9.5%. In comparison to the straight flow channel, flow channels installing side blockage present about 1.5 K lower of the maximum temperature, more uniform temperature distribution and increased Nusselt number, indicating the enhancement of heat transfer. Based on field synergy theory, it’s found that the average angles describing the synergetic effect of heat transfer and mass transfer decrease with the installation of side blockages. This reveals the enhancement of the synergetic degree in heat and mass transfer processes under the turbulence of side blockages, which coincides with the improved performance of PEMFC.

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Section: Resultssupporting

confidence: 75%

Section: Velocity Fieldmentioning

confidence: 96%

Enhancement effects of the side blockage arrangement in the flow channel on the performance of a proton exchange membrane fuel cell

Shen

Yan

et al. 2022

Intl J of Energy Research

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“…The current density of the fuel cell has been successfully increased by including a boss structure in the flow channel. Employing both numerical and experimental techniques, Ebrahimzadeh [21] investigated the impact of bosses in a two-way serpentine flow field on PEMFC efficiency. The bosses with dimensions of 1.5mm high x 3.6mm wide had the biggest impact on the voltage drop and current density of the PEMFC, according to their initial numerical simulations of the height and width of the bosses.…”

Section: Research Status Of Flow Field Structure After Optimization B...mentioning

confidence: 99%

Bipolar Plate Flow Field Structure Research Status and Trends for Hydrogen Fuel Cell Vehicles

Xinhao

Guo²,

Zhang³

et al. 2022

JERR

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The bipolar plate is the fundamental structural element of the hydrogen fuel cell, and its flow field design has a significant impact on the performance of the fuel cell. The hydrogen fuel cell is employed as an important energy supply source for vehicle power. The classification and operation of hydrogen fuel cells, as well as the benefits and drawbacks of conventional flow fields, are discussed in this paper and contrasted with the state of bipolar plate flow field research in recent years. Comprehensive analysis is done on the optimization of the fuel cell bipolar plate flow field based on the conventional flow field. All are favorable to enhancing fuel cells' ability to generate electricity and aid in the progressive development of a full set of structural design guidelines.

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“…Tekli, ikili ve üçlü serpantin akış alanlarının kullanıldığı ve bunların akış dönüş noktalarının (dirsek) açılarının keskin ve geniş dönüşlü olarak karşılaştırıldığı çalışmada, kendilerinin önerdikleri akış alanı tipinin daha iyi performans verdiğini öne sürmüşlerdir. Akış alanlarının karşılaştırılması yöntemi, literatürde sıklıkla kullanılmakta olup, pek çok çalışma gerçekleştirilmiştir [23][24][25][26][27][28][29][30]. Awin ve Dukhan, serpantin akış alanına sahip klasik grafit BP ile alüminyum içine yerleştirilen alüminyum metal köpük BP'nin performanslarını karşılaştırmıştır [30].…”

Section: Akış Alanlarıunclassified

“…Günümüzde deneysel çalışmalarla birlikte analitik ve nümerik çalışmalar da gerçekleştirilebilmektedir. Deneysel çalışmalarda akış alanının görüntülenmesi zor olduğu için, araştırmacılar nümerik çalışmalarla akış alanlarını irdelemekte ve sonrasında deneysel analiz ile çalışmayı bütünleştirmektedirler [23,25,31,32]…”

Section: Deneysel çAlışma Düzeneğiunclassified

Bipolar Plaka Akış Alanları Üzerine Deneysel Çalışmalar

Koçak¹,

Topcu²,

Aydın³

et al. 2019

acperpro

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ÖzetTemiz ve alternatif enerji arayışı, insanlığın sürekli artan enerji talebini karşılama doğrultusunda artış göstermektedir. Yakıt pilleri, yakıtın kimyasal enerjisini kullanarak doğrudan elektriğe dönüştüren yüksek verimli enerji dönüşüm sistemleridir. Klasik elektrik enerjisi üretim çevriminde yakıt önce yakılarak ısı enerjisi elde edilmekte, ardından buhar etkisi ile türbin döndürülmekte, jeneratörde akım elde edilmekte ve depolanmaktadır. Bu enerji dönüşümü oldukça karmaşık ve çok makineli bir sistem gerektirirken, her enerji dönüşümünde enerji kayıpları da meydana gelmektedir. Yakıt pillerinde ise sadece yakıtın elektronlarını devreden geçirerek yüksek elektriksel verimle enerji elde edilmektedir. Bu çalışmada yakıt pili çeşitlerinden PEM yakıt pilleri ele alınarak, PEM yakıt pillerinde kullanılan bipolar plakaların akış alanları incelenmiştir. Literatürde nümerik çalışmalar da bulunmakla birlikte, yakıt pillerinin oldukça değişken çalışma şartlarından dolayı deneysel olarak test etmek büyük önem arz etmektedir. Bu nedenle son on yılda yapılmış olan deneysel çalışmalar, yöntemleriyle sunulmuştur. Günümüzde çok popüler bazı akış kanalları verilmekle beraber, akış kanallarını birbirleriyle karşılaştırma yöntemiyle üstünlüğün belirlendiği anlaşılmış ve günümüzde hala optimum akış kanalına ulaşılamadığı gözlemlenmiştir. AbstractBe in search of clean and alternative energy is increases with the increasing of energy demand of humanity. Fuel cells are high efficiency energy conversion systems that convert the fuel directly into electricity using the chemical energy of the fuel. In the classical electric power generation cycle, the first; fuel is burned and heat energy is obtained, then the turbine is turned with the effect of steam, after that current is obtained and stored in the generator. While this energy conversion requires a very complex and multi-machine system, energy losses occur with each energy conversion. In fuel cells, energy is obtained with high electrical efficiency using only electrons of the fuel. In this study, bipolar plate flow field was investigated used in PEM fuel cells. Although there are numerical studies in the literature, it is very important to test the fuel cells experimentally due to the highly variable operating conditions. For this reason, experimental studies in the last ten years were presented with their experimental approaches. Although some of the most popular flow channels are illustrated today, it is understood that superiority is determined by comparing the flow channels with each other and it is observed that the optimum flow channel is still not reached today.

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Experimental and numerical investigation of obstacle effect on the performance of PEM fuel cell

Cited by 54 publications

References 25 publications

Enhancement effects of the side blockage arrangement in the flow channel on the performance of a proton exchange membrane fuel cell

Enhancement effects of the side blockage arrangement in the flow channel on the performance of a proton exchange membrane fuel cell

Bipolar Plate Flow Field Structure Research Status and Trends for Hydrogen Fuel Cell Vehicles

Bipolar Plaka Akış Alanları Üzerine Deneysel Çalışmalar

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