Finite element method modeling and optimization of the mechanical behavior of a low-temperature PEM fuel cell

Safiye Nur Özdemir; İmdat Taymaz; Emre Kurt

Makale detayları

Finite element method modeling and optimization of the mechanical behavior of a low-temperature PEM fuel cell

Yazarlar:

Safiye Nur Özdemir | İmdat Taymaz | Emre Kurt

Yayıncı:

Pamukkale University

Ana Başlıklar:

Makine Mühendisliği (Diğer)

Dergi:

Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi Vol.30 Issue 6, pp.715-728

Belge Tipi:

Makale

Yayın Tarihi:

11/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001332005

pISSN:

2147-5881

Anahtar kelimeler:

Özet:

 Proton exchange membrane fuel cells PEMFCs consist of six main components: current collectors CC, end plates EP, bipolar plates BPP, gas diffusion layers GDL, gaskets, and membrane electrode assembly MEA. PEMFC assembly or design parameters are critical for maximum performance, strength, and reliability. The cells mechanical behavior should be known for optimum fuel cell assembly and design. Therefore, a three-dimensional finite element model of PEMFC with an active area of 100 cm² was developed, and the stress and deformation values in the cell components were calculated with Ansys Mechanical software. The response surface method RSM was applied to obtain optimum levels and analyze the effect of design parameters. For statistical analysis, bolt number, bolt hole diameter, and clamping torque were defined as three different independent design variables, and their individual-combined effects on stress and deformation, which were determined as response parameters, were analyzed. Therefore, the number of bolts, bolt hole diameter, and clamping torque ranges are 12- 20, 4-6 mm, and 9-15 Nm, respectively. When the number of bolts is 12, the bolt hole diameter is 6 mm, the clamping torque is 9 Nm, the total minimum deformation is 0.063 mm, and the minimum stress on the membrane is 12.846 MPa. As a result of reducing the bolt hole diameter from 6 mm to 4 mm, the total deformation has increased by approximately 60.4. With the increasing number of bolts, more homogeneous stress distributions were achieved, and the end plates maximum stress increased by about 83.3. The increase in clamping torque has caused a pressure increase of roughly 21 MPa on the membrane. The numerical and statistical findings of the study can be an important guide in evaluating the performance, durability and reliability of the PEMFC.

 Proton exchange membrane fuel cells PEMFCs consist of six main components: current collectors CC, end plates EP, bipolar plates BPP, gas diffusion layers GDL, gaskets, and membrane electrode assembly MEA. PEMFC assembly or design parameters are critical for maximum performance, strength, and reliability. The cells mechanical behavior should be known for optimum fuel cell assembly and design. Therefore, a three-dimensional finite element model of PEMFC with an active area of 100 cm² was developed, and the stress and deformation values in the cell components were calculated with Ansys Mechanical software. The response surface method RSM was applied to obtain optimum levels and analyze the effect of design parameters. For statistical analysis, bolt number, bolt hole diameter, and clamping torque were defined as three different independent design variables, and their individual-combined effects on stress and deformation, which were determined as response parameters, were analyzed. Therefore, the number of bolts, bolt hole diameter, and clamping torque ranges are 12- 20, 4-6 mm, and 9-15 Nm, respectively. When the number of bolts is 12, the bolt hole diameter is 6 mm, the clamping torque is 9 Nm, the total minimum deformation is 0.063 mm, and the minimum stress on the membrane is 12.846 MPa. As a result of reducing the bolt hole diameter from 6 mm to 4 mm, the total deformation has increased by approximately 60.4. With the increasing number of bolts, more homogeneous stress distributions were achieved, and the end plates maximum stress increased by about 83.3. The increase in clamping torque has caused a pressure increase of roughly 21 MPa on the membrane. The numerical and statistical findings of the study can be an important guide in evaluating the performance, durability and reliability of the PEMFC.

 Proton exchange membrane fuel cells PEMFCs consist of six main components: current collectors CC, end plates EP, bipolar plates BPP, gas diffusion layers GDL, gaskets, and membrane electrode assembly MEA. PEMFC assembly or design parameters are critical for maximum performance, strength, and reliability. The cells mechanical behavior should be known for optimum fuel cell assembly and design. Therefore, a three-dimensional finite element model of PEMFC with an active area of 100 cm² was developed, and the stress and deformation values in the cell components were calculated with Ansys Mechanical software. The response surface method RSM was applied to obtain optimum levels and analyze the effect of design parameters. For statistical analysis, bolt number, bolt hole diameter, and clamping torque were defined as three different independent design variables, and their individual-combined effects on stress and deformation, which were determined as response parameters, were analyzed. Therefore, the number of bolts, bolt hole diameter, and clamping torque ranges are 12- 20, 4-6 mm, and 9-15 Nm, respectively. When the number of bolts is 12, the bolt hole diameter is 6 mm, the clamping torque is 9 Nm, the total minimum deformation is 0.063 mm, and the minimum stress on the membrane is 12.846 MPa. As a result of reducing the bolt hole diameter from 6 mm to 4 mm, the total deformation has increased by approximately 60.4. With the increasing number of bolts, more homogeneous stress distributions were achieved, and the end plates maximum stress increased by about 83.3. The increase in clamping torque has caused a pressure increase of roughly 21 MPa on the membrane. The numerical and statistical findings of the study can be an important guide in evaluating the performance, durability and reliability of the PEMFC.

 Proton değişim membranlı yakıt pilleri PEMYP altı esas bileşenden oluşmaktadır: akım toplayıcılar AT, uç plakalar UP, bipolar plakalar BP, gaz difüzyon tabakaları GDT, contalar ve membran elektrot ünitesi MEÜdir. Maksimum performans, yüksek dayanım ve güvenilirlik için PEMYP montaj veya tasarım parametreleri kritik bir öneme sahiptir. Optimum yakıt pil montaj ve tasarımı için hücrenin mekanik davranışlarının bilinmesi gerekmektedir. Yakıt pilinin mekanik montaj sürecinin deneysel tekniklerle gerçek zamanlı olarak yapılması oldukça maliyetli ve zaman alıcıdır. Bu nedenle, 100 cm² aktif alana sahip PEMYPnin üç boyutlu sonlu eleman modeli geliştirilmiş, hücre bileşenlerindeki gerilme ve deformasyon değerleri Ansys Mechanical yazılımı ile hesaplanmıştır. Optimum seviyeleri elde etmek ve tasarım parametrelerinin etkisini analiz etmek için cevap yüzeyi yöntemi CYY uygulanmıştır. İstatistiksel analiz için cıvata sayısı, cıvata delik çapı ve sıkıştırma torkları üç farklı bağımsız tasarım değişkeni olarak tanımlanmış, bunların yanıt parametreleri olarak belirlenen gerilme ve deformasyon üzerindeki bireysel-birleşik etkileri analiz edilmiştir. Bu nedenle çalışılan cıvata sayısı, cıvata delik çapı ve sıkıştırma torku aralıkları sırasıyla 12-20, 4-6 mm ve 9-15 Nmdir. Cıvata deliği çapının 6 mmden 4 mmye düşürülmesi sonucunda, toplam deformasyon yaklaşık olarak 60.4 oranında artmıştır. Artan cıvata sayısıyla birlikte daha homojen gerilme dağılımları sağlanmış ve uç plakadaki maksimum gerilme yaklaşık olarak 83.3 oranında artmıştır. Sıkıştırma torkundaki yükselme ise membran üzerinde yaklaşık olarak 21 MPalık bir basınç artışına neden olmuştur. Çalışmanın sayısal ve istatistiksel bulguları, PEMYP performansının, dayanıklılığının ve güvenilirliğinin değerlendirilmesinde önemli bir rehber olabilir.

Makale detayları

Finite element method modeling and optimization of the mechanical behavior of a low-temperature PEM fuel cell

Yazarlar:

Safiye Nur Özdemir | İmdat Taymaz | Emre Kurt

Yayıncı:

Pamukkale University

Ana Başlıklar:

Makine Mühendisliği (Diğer)

Dergi:

Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi Vol.30 Issue 6, pp.715-728

Belge Tipi:

Makale

Yayın Tarihi:

11/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001332005

pISSN:

2147-5881

3D PEMFC

Finite element method

Response surface method

Optimization

Mechanical analysis3B PEMYP

Sonlu elemanlar yöntemi

Cevap yüzeyi yöntemi

Optimizasyon

Mekanik analiz

Sayı

Makale detayları

Yazarlar: Safiye Nur Özdemir | İmdat Taymaz | Emre Kurt

Yayıncı: Pamukkale University

Ana Başlıklar: Makine Mühendisliği (Diğer)

Dergi: Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi Vol.30 Issue 6, pp.715-728

Belge Tipi: Makale

Yayın Tarihi: 11/2024

Belge Dili: Türkçe

Document ID (Org No.): 2001332005

pISSN: 2147-5881

Sayı

Yazarlar:

Safiye Nur Özdemir | İmdat Taymaz | Emre Kurt

Yayıncı:

Pamukkale University

Ana Başlıklar:

Makine Mühendisliği (Diğer)

Dergi:

Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi Vol.30 Issue 6, pp.715-728

Belge Tipi:

Makale

Yayın Tarihi:

11/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001332005

pISSN:

2147-5881