Non-isothermal modeling of direct methanol fuel cell

Zou, Jinqiang; He, Ya-Ling; Miao, Zheng; Li, Xiaoyue

doi:10.1016/j.ijhydene.2010.01.123

Cited by 27 publications

(6 citation statements)

References 35 publications

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“…Greek letters a kinetic transfer coefficient g reaction order d thickness, m ε porosity h voltage loss, V q contact angle, l water content in ionomer m dynamic viscosity, kg m À1 s À1 r density, kg m À3 k ionic conductivity of membrane, U À1 m À1 s surface tension coefficient, N m À1 s s electric conductivity, U À1 m À1 Ф potential, V i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y x x x ( 2 0 1 5 ) 1 e2 0 evaluate the effects of the various operating and design parameters on the transport characteristics and performance, for example, the methanol feeding concentration [24e26], operating temperature [27,28], catalyst properties of anode and cathode [29] operating current density [28,30], methanol crossover [25,28], water transport [31e33], geometric dimensions [34,35] and electrochemical impedance spectra [36] were all considered. In addition, mathematical models were developed to study the transient operation as well [28,30,37].…”

Section: Introductionmentioning

confidence: 99%

Effect of electrode variable contact angle on the performance and transport characteristics of passive direct methanol fuel cells

Sun

Guo

Deng

et al. 2015

International Journal of Hydrogen Energy

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Section: Introductionmentioning

confidence: 99%

Effect of electrode variable contact angle on the performance and transport characteristics of passive direct methanol fuel cells

Sun

Guo

Deng

et al. 2015

International Journal of Hydrogen Energy

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“…The membrane is well hydrated, whence we assume constant water transport properties; [8][9][10][11][46][47][48]66 the membrane is also assumed impermeable to carbon dioxide (methanol as a fuel), acetic acid (ethanol as fuel), oxygen, and nitrogen. The membrane is well hydrated, whence we assume constant water transport properties; [8][9][10][11][46][47][48]66 the membrane is also assumed impermeable to carbon dioxide (methanol as a fuel), acetic acid (ethanol as fuel), oxygen, and nitrogen.…”

Section: Mathematical Formulationmentioning

confidence: 99%

“…3. The membrane is well hydrated, whence we assume constant water transport properties; [8][9][10][11][46][47][48]66 the membrane is also assumed impermeable to carbon dioxide (methanol as a fuel), acetic acid (ethanol as fuel), oxygen, and nitrogen.…”

Section: Mathematical Formulationmentioning

confidence: 99%

Two-Dimensional Approximate Analytical Solutions for the Direct Liquid Fuel Cell

Birgersson

2011

J. Electrochem. Soc.

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A two-dimensional, steady-state, isothermal, and single-phase model considering the conservation of mass, momentum, and species of a direct liquid fuel cell (DLFC) is presented, solved analytically, and demonstrated for a DLFC running on methanol or ethanol. For the anode, approximate analytical solutions that capture the local leading-order physical and electrochemical phenomena are obtained with Taylor series expansions, homogenization, and separation of variables; for the cathode, a closed-form, integrable expression is secured for the local and parasitic current densities, followed by the introduction of a transformation, and solution of the resulting set of equations with the method of eigenfunction expansion. The full set of equations are calibrated and validated with experiments, after which the approximate analytical solutions are verified with the full set: Overall, good to reasonably good agreement is found for both methanol and ethanol, although the single-phase model is not able to capture high current densities (larger than around 2000 Am À2 ) that can be obtained with methanol. These closed-form solutions can easily be adjusted to account for other types of liquid fuels and should lend themselves well to, e.g., multi-objective optimization.

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“…The literature reviewed is selected by the source term type. Others in reference [1] examined heat transfer by natural convection. The source term is composed by the flow resistance, the electrochemical reactions, the over potential, the entropy change due to the electrochemical reaction and the methanol reaction cathode heat loss.…”

Section: Introductionmentioning

confidence: 99%

DMFC water management in presence of heat sources

Houria¹,

Zitouni²,

Haddad³

et al. 2017

MMEP

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A heat and mass transfer numerical study is conducted in DMFC in presence of the heat sources. The model is used to investigate the current density effect at operation conditions (temperature) and at water, methanol, carbon dioxide and oxygen concentration. For the numerical resolution, governing equations are discretized by the finite volume method. A program written in FORTRAN language was developed in order to obtain the temperature, water, methanol, oxygen and carbon dioxide fields. The results show that there is a temperature rise at the membrane which involves the membrane drying. However, for the water concentration field, a dehydration problem solution in the membrane is considered. The current density is the key parameter simulation since it is present in Joules effect terms.

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Non-isothermal modeling of direct methanol fuel cell

Cited by 27 publications

References 35 publications

Effect of electrode variable contact angle on the performance and transport characteristics of passive direct methanol fuel cells

Effect of electrode variable contact angle on the performance and transport characteristics of passive direct methanol fuel cells

Two-Dimensional Approximate Analytical Solutions for the Direct Liquid Fuel Cell

DMFC water management in presence of heat sources

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