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Fuel cells are controlled by black box control systems which does not allow for the user to understand the proprietary control algorithms employed. Little feedback can be understood from the control system and this leads to the blind use of the proton exchange membrane fuel cells which in turn could lead to cell deterioration and failure. Understanding the important factors influencing proton exchange...
In this paper water management in proton exchange membrane (PEM) fuel cell is considered. First mass conservation law for water is applied. Next proton transport is described by the Nernst-Planck equation and liquid water convection velocity is eliminated by the Schlögl equation. Electro-osmotic drag coefficient is related to hydrogen index and experimentally determined swelling coefficient.
Proton Exchange Membrane Fuel Cell (PEMFC) is one of fuel cell type that suitable for vehicular application because it has low operation pressure and temperature, stable, relatively small, and highly mobile. The major concern of PEMFC as vehicular power is its resistance toward start-stop cycle and constant load. PEMFC on vehicular application require fuel processor to produce hydrogen as fuel source...
A three dimensional computational fluid dynamics model is proposed in this paper to investigate the effect of flow field design and dimensions of current collectors on performance of proton exchange membrane fuel cell (PEMFC) under different operating conditions. Influences of the ribs and openings current collector dimensions have been studied and analyzed in order to find the optimum ratio between...
We report a microliter-sized (140 µL) microbial fuel cell (MFC)-based biosensor integrated with a three-electrode configuration and an air-bubble trap, in which microorganisms act as the sensor for toxic substances in water. The small-scale MFC biosensor produced favorable conditions for (i) reducing measurement time by increasing the probability of cell attachment and biofilm formation in the micro-sized...
Integration of electrochemical analytical functionality into a micro-sized microbial fuel cell is demonstrated. Screen-printed carbon ink based working (anode) and counter (cathode) electrodes and Ag/AgCl ink based reference electrode were deployed for sensing. Using such three-electrode configuration, in-situ cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were successfully...
Power generation in microbial fuel cell (MFC) at different cathode electrode surface area was examined in two-chambered system with sodium acetate as carbon sources. When the anode surface area of 66 cm2 was used, the maximum power density increased by 44% when the cathode surface areas were increased from 66 cm2 to 336 cm2 and decreased by 21% when the cathode surface area was reduced to 14 cm2,...
In order to increase the power output and reduce the cost of MFCs, micro filtration membrane (MFM) air-cathode MFC (MFM-MFC) and proton exchange membrane (PEM) air-cathode MFC (PEM-MFC) were compared in the performance of the simultaneous decolorization of azo dye and power generation. Batch test results showed that the PEM-MFC produced a maximum power density of 272 mW/m2. The using the MFM in stead...
Proton Exchange Membrane (PEM) Fuel Cells are attracting most of the electricity consumers because of high efficiency, zero carbon emissions and high reliability. There are many parameters influencing on this power source's operation. A model of PEM fuel cell will be presented and the sensitivity of the fuel cell's parameters will be analyzed. Multi Parameters Sensitivity Analysis is used next to...
Real-time and simultaneous measurements of bacterial catalyst loading and electron transfer have been accomplished via a microfabricated transparent electrode within the setup of a micro-microbial fuel cell (??MFC). By characterizing the electron transfer on a per cell basis, we aim to generate a methodology for species-to-species comparison and formulate a baseline for electrode optimizations. This...
A cheap and locally available wood charcoal was used as the main electrode component of an air cathode MFC. The air cathode was build with fine charcoal powder and cement plaster as binder; while anode is a packed bed of charcoal granules. Mangrove estuary brackish water was inoculated in the anodic chamber as the fuel and source of exoelectrogens. The constructed fuel cell was monitored by measuring...
A microbial fuel cell with a microfabricated electrode and exoelectrogenic bacteria has been demonstrated. The superior compatibility of the organism's microbiology makes this approach more attractive and practical over previously micromachined microbial fuel cell designs. Both electrical performance and longevity of the device are greatly improved with continuous power output for over a week and...
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