An air breathing proton exchange membrane fuel cell (PEMFC) combines H 2 or reformed hydrocarbon fuel and O 2 from air to produce electrical energy. The efficiency of nano-scale platinum catalysts at the fuel cell cathode is highly susceptible to carbon monoxide (CO) poisoning and results in irreversible damage to the electrode. Higher CO 2 level in air does not induce catalytic poisoning , however it lowers the partial pressure of O 2 at cathode . This results in a drop of fuel cell output power. Our work proposes a combined range sensing and proximate sensing based approach for tracking of smoke plume. Our approach helps to tackle the PEMFC degradation issue by forecasting nature of the plume in vicinity of the fuel cell. The simulation results quantify the dynamic changes in PEMFC electrode resistance with respect to higher levels of CO concentration in air. Drop in fuel cell output power with respect to higher mass fractions of CO 2 and ambient humidity are also quantified in this work. The proposed threat prediction based approach helps to enhance the lifetime of a field deployed air PEMFC by reducing and/or inhibiting the air contaminant based fuel cell degradation mechanisms.
Keywords-component; air breathing field deployed PEMFC, range and proximate sensing, plume tracking, enhancing FC life
I. INTRODUCTIONA fuel cell is an electrochemical device that combines hydrogen and oxygen to produce electricity with water and heat as the bye product. Hydrogen is the most commonly used fuel, but other hydrocarbons such as methanol, ethanol, CNG, and propane may be also used as fuels. Production of high energy density at comparatively low temperature, high systems efficiency (80%), and pollutant free quieter operation are the salient features of fuel cell technology. For these reasons, fuel cell technology is uniquely suited for use in a wide variety of stationary, vehicular, and portable energy and power applications. Today, demonstration projects have shown fuel cell systems to be feasible for portable power, transportation (including personal vehicles), utility power, and on-site power generation in a variety of building applications. Most of the major automobile manufacturers now have ambitious programs to develop proton exchange membrane fuel cells as an alternative to the internal combustion engines. Apart from resident applications, many different types of fuel cell systems have been demonstrated for uses in hospitals, boiler plants, surveillance and military purposes, telecommunication facilities, power microgrid etc [1][2][3][4][5][6][7].