Empirical Model Equations for the Direct Methanol Fuel Cell DMFCs

Abstract

Empirical model equations, proposed for polymer electrolyte fuel cells, are used to predict the cell voltage vs. current density response of a liquid feed direct methanol fuel cell. The model equations are validated against experimental data for a small‐scale fuel cell over a wide range of methanol concentration and temperatures. A new empirical equation is presented which is able to predict the voltage response of liquid feed direct methanol fuel cells over a wide range of operating conditions and even in the case of very low current densities caused by, for example, the use of dilute methanol solutions or low cell temperatures.

Development of Semi-Empirical Cell Voltage Model for Direct Methanol Fuel Cell

“…Solid lines are calculated from this work (eq.(29)). Dotted lines are experimental data reported by Argyropoulos et al [12] It can be seen that the predictions calculated from the proposed model are in good agreement with experimental data over the wide range of experimental conditions. Model parameters are listed in Table 1.…”

Surface modification of sulfonated poly(ether ether ketone) membranes using Nafion solution for direct methanol fuel cells

“…3, up to the end of the linear region, the cell potential (V) versus current density (i) data can be fitted by using the following empirical equations [16,17]:…”

High power efficiency design of direct methanol fuel cell power generating systems

“…The cell voltage response of a small-scale single DMFC is modeled as the following [15]: (1) where Ecell is the cell voltage, Eo is the reversible cell potential, b is the Tafel slope for oxygen reduction, j is the cell current density, Re is the ohmic resistance of the cell, and the values of the terms C 1 and C2 are decided by temperature and methanol solution.…”

“…T --T -V ::; -� Q� + bd bd (15) (16) and �, � are uniformly bounded for bounded bd. According to e(t), e(t), e(t) E Loo and e(t) is convergent, the fact limHooe = limHoo(Yd -y) = 0 is guaranteed by Barblat's lemma.…”