The effect of vertical injection of reactants to the membrane electrode assembly on the performance of a PEM fuel cell

  • سال انتشار: 1395
  • محل انتشار: فصلنامه هیدروژن و پیل سوختی ایران، دوره: 3، شماره: 3
  • کد COI اختصاصی: JR_IJHFC-3-3_001
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 432
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نویسندگان

Farzin Ramin

Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran

Sima Baheri Islami

Faculty of Mechanical Engineering, University of Tabriz, Tabriz, Iran

Siamak Hossainpour

Faculty of Mechanical Engineering, Sahand University of Technology, Tabriz, Iran

چکیده

In order to present a new and high performance structure of PEM fuel cell and study the in uence of the  ow direction and distribution on the rate of reactants diffusion, three novel models of vertical reactant  ow injection into the anode and cathode reaction area  eld have been introduced. They consist of one inlet, two inlets, and a continuous channel. The governing equations on the steady three dimensional non-isothermal  ow have been discretized using the  nite volume method. These 3D simulations evaluate the effectiveness of  ow direction on the transportation and chemical phenomenainside the PEM fuel cell by applying the computational  uid dynamics (CFD) method to the transportation and conservation equations with the suppositions of steady state and one phase  ow. The numerical results are validated with experimental ones for available common fuel cells. The results show that the presented geometries have several mechanical and chemical bene ts, such as extra diffusion of reactants, because of  ow direction, improvement of species distributions, enhancement in temperature management and more effective water removal due to the number of outlets and uniformcurrent distribution. Furthermore, the continuous channel inlet presents a substantially higher performance than the others due to covering more reaction area and having a high rate of reactants diffusion. With regard to the polarization curve along with other advantages, the mentioned design can be strongly recommended to obtain high operating ef ciency and can be considered for the manufacture of a new generation of PEM fuel cells in the form of high performance stacks.

کلیدواژه ها

PEM fuel cell,Vertical injection,Numerical modeling,Polarization,MEA,

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