A Five Layer One-Dimensional PEMFC Model with Detailed Electrode Kinetics

Ficicilar, B.
Eroğlu, İnci
Nguyen, T. V.
In this study, a non-isothermal, two-phase, one-dimensional, and steady state proton exchange membrane (PEM) fuel cell model is developed to investigate the detailed electrode kinetics in the anode and cathode catalytic regions and the effects of these reaction mechanisms on the performance of a PEM fuel cell. Langmuir-Butler-Volmer (LBV) type reaction rate expressions are suggested for both anode and cathode electrochemical reactions. A two-phase energy balance approach is used to catch the thermal transport phenomena in cases when there is a significant temperature difference between the fuel cell temperature and the reactants inlet temperatures like during cold start-up.


Effect of thermal neutron irradiation on the elastic constants of tourmaline
Özkan, H. (Informa UK Limited, 1987-2)
The effect of thermal neutron irradiation due to the B10(n, α)Li7 reaction on the elastic wave velocities and the elastic moduli of tourmaline crystals has been studied. Oriented tourmaline samples have been irradiated with thermal neutrons to 7.6 × 1018n/cm2 and the elastic wave velocities determined by ultrasonic measurements. The elastic wave velocities are not affected by thermal neutron irradiation below 8 × 10l7n/cm2, effects starting to appear at approximately 1 × l018n/cm2 with more important decrea...
A Modeling Study on the Layout Impact of with-in-die Thickness Range for STI CMP
Kıncal, Serkan; BAŞIM DOĞAN, GÜL BAHAR (2012-10-01)
Chemical Mechanical Planarization process has a proven track record as an effective method for planarizing the wafer surface at multiple points of the semiconductor manufacturing flow. One of the most challenging aspects of the CMP process, particularly in applications like Shallow Trench Isolation (STI), is the difference in relative removal rates of the different materials that are being polished. A certain amount of over-polish is required to clear oxide on top of the nitride, however, this over-polish m...
A computational procedure for estimating residual stresses and secondary plastic flow limits in nonlinearly strain hardening rotating shafts
Eraslan, Ahmet Nedim (Springer Science and Business Media LLC, 2005-03-01)
A computational procedure to estimate the residual stress distributions and the limit angular speeds for avoiding secondary plastic deformation in nonlinearly strain hardening rotating elastic-plastic shafts is given. The model is based on von Mises yield condition, J(2) deformation theory and a Swift-type hardening law. The boundary value problem for the governing nonlinear differential equation is solved by a shooting method using Newton iterations with numerically approximated tangent. Solid as well as h...
A new method for processing of monazite and examination of the products by X-ray analysis
Kizilyalli, Meral; Welch, Alastair J. (Elsevier BV, 1987-1)
Sintering reactions of lanthanide orthophosphates with Na2CO3 gave the expected products (Na3PO4 and Ln2O3) with stoichiometric amounts of Na2CO3. When less than the theoretical amounts of Na2CO3 were used, two intermediate products eventually characterized by X-ray diffraction as Na3Ln(PO4)2 and Ln3PO7 were detected. Application of the sintering method to naturally occurring phosphates, particularly the mineral monazite, proved to be very successful. By using the optimum amount of Na2CO3 to form Na3Ln(PO4)...
A Multi-source Micro Power Generator Employing Thermal and Vibration Energy Harvesting
Toreyin, Hakan; Topal, Emre; Külah, Haluk (2010-09-08)
This paper introduces a new cantilever type multi-source energy harvester generating electric power from both ambient heat and vibration. Harvesting energy from vibration was realized by electromagnetic conversion, whereas the energy generation from heat was supplied by making use of Seebeck effect of Cr-Al thermocouples implemented on the microcantilevers. The measured average Seebeck coefficient is 12 mu V/K per thermocouples. A total voltage of 3.3 mV was generated from the thermoelectric part and 13.4 m...
Citation Formats
B. Ficicilar, İ. Eroğlu, and T. V. Nguyen, “A Five Layer One-Dimensional PEMFC Model with Detailed Electrode Kinetics,” 2010, vol. 33, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/51560.