Multiphysics modeling of fuel cells
Başlık çevirisi mevcut değil.
- Tez No: 400102
- Danışmanlar: DR. ALEVTİNA SMİRNOVA, DR. JEONG HO KİM, DR. UĞUR PAŞAOĞULLARI
- Tez Türü: Doktora
- Konular: Makine Mühendisliği, Mechanical Engineering
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2009
- Dil: İngilizce
- Üniversite: The University of Connecticut
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 225
Özet
Özet yok.
Özet (Çeviri)
Fuel cells are expected to resist permanent changes in performance over time, to tolerateunexpected changes in the ambient conditions for a stable operation, and to sustain astructural integrity under different operating conditions. However, during the operation,both solid oxide fuel cells (SOFC) and polymer electrolyte fuel cells (PEFC) are prone tomany hazards that may cause degradation of the performance even to the extent ofcomplete failure of these devices.In this study performance and degradation of SOFCs and PEFCs is studied. Acomputational modeling framework has been established to investigate the transportphenomena and the electrochemical performance as well as the mechanical behavior ofSOFCs and PEFCs.The electrochemical performance of the SOFC is investigated both in steady-stateand transient operations while elucidating the transport phenomena related to the fuel celloperation. The proposed computational framework for the SOFC comprises two separatemodels for the test furnace and the single cell in order to more accurately model theactual test system while decreasing the computational cost. The fuel cell performance intransient operation is also studied. The performance of the SOFC is investigated in caseof a failure in the fuel supply system. Mechanical behavior of the SOFC is alsoconsidered to help assessing the durability of the cells.The same modeling framework is utilized for the PEFCs to investigateelectrochemical and mechanical degradation during the fuel cell operation. To assess theperformance degradation as a result of gas contamination, a cation transport model ispresented. It is found that the effect of fuel side contamination of cationic species is muchmore significant than the air side contamination while there still is a significantperformance degradation associated with the latter.Further, the stresses induced during the PEFC operation due to the swelling andshrinkage of the membrane with hydration changes are investigated. The impact of theanisotropy in the gas diffusion layers on the mechanical stresses is investigated and foundto have a significant effect on the stress distribution in the membrane.
Benzer Tezler
- Multiphysics modeling of a microchannelmethanol steam reformer for high temperature polymer electrolytemembrane fuel cell systems
Yüksek sıcaklıklı polimer elektrolit membran yakıt hücresi sistemleri için mikro kanallı metanol buharı dönüştürücüsünün multifizik modellenmesi
MÜNÜR SACİT HERDEM
Doktora
İngilizce
2019
EnerjiUniversity of WaterlooEnerji Ana Bilim Dalı
PROF. DR. FERİDUN HAMDULLAHPUR
DOÇ. SİAMAK FARHAD
- Modeling of a high temperature PEM fuel cell
Yüksek sıcaklıkta çalışan PEM yakıt pilinin modellenmesi
BERNA SEZGİN
Yüksek Lisans
İngilizce
2016
Kimya MühendisliğiOrta Doğu Teknik ÜniversitesiKimya Mühendisliği Ana Bilim Dalı
PROF. DR. İNCİ EROĞLU
DOÇ. DR. YILSER DEVRİM
- Gaz difüzyon tabakalarında termal iletkenlik katsayısı tayini ve proton değişim membran yakıt pilinin izotermal olmayan modelinin geliştirilmesi
Determination of thermal conductivity coefficient in gas diffusion layers and development of the non-isothermal model of proton change membrane fuel cell
ANIL CAN TÜRKMEN
Yüksek Lisans
Türkçe
2018
Makine MühendisliğiKocaeli ÜniversitesiMakine Mühendisliği Ana Bilim Dalı
DOÇ. DR. CENK ÇELİK
- Polimer elektrolit membranlı yakıt hücresi için model geliştirilmesi ve comsol programı ile simülasyonu
Model development and computational simulation of polymer electrolyte membrane fuel cell with comsol multiphysics
FATİH SORGULU
Yüksek Lisans
Türkçe
2016
EnerjiYalova ÜniversitesiEnerji Sistemleri Mühendisliği Ana Bilim Dalı
YRD. DOÇ. MEHMET EKREM ÇAKMAK
- Investigation of temperature profile in high temperature pem fuel cell
Yüksek sıcaklık pem yakıt pilinin sıcaklık profilinin araştırılması
DİLARA GÜLÇİN ÇAĞLAYAN
Yüksek Lisans
İngilizce
2016
Kimya MühendisliğiOrta Doğu Teknik ÜniversitesiKimya Mühendisliği Ana Bilim Dalı
PROF. DR. İNCİ EROĞLU
DOÇ. DR. YILSER DEVRİM