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A numerical model was developed to predict the water concentration, temperature, potential and pressure across a Nafion membrane used in proton exchange membrane (PEM) based fuel cells. The numerical model consists of simultaneously calculating the diffusive flux for water and hydrogen, the proton potential and the pressure and temperature at each node...
This is the second part in a SaveOnEnergy series discussing the ins and outs of different forms of renewable energy. Harnessing the power of the wind is not a new idea. In fact, humans have been using wind power for hundreds of years. From filling the sails of massive ships to the classic windmills powering grain mills, wind power has...
A one-dimensional heat, mass and charge transfer model was developed for a polymer electrolyte fuel cell stack to predict the temperatures, mass flows, pressure drops, and charge transport of each fuel cell layer over different operating conditions. The fuel cell layers’ boundaries were...
Many automotive manufacturers have chosen fuel cell technology as the long-term solution to replace combustion engines when the oil stops flowing -- but that’s not expected to happen for at least another 15 years (even if we keep using it at our current rate). So why are we...
I was getting my haircut last week, and my hairdresser told me that her daughters are interested in science. She then asked me, “What should I tell them about science-based careers?” “I really do not know what scientists and engineers do?” I could see my hairdresser’s point-of-view though, I really did not know much about engineering or...
Fuel cells are not limited to pure hydrogen gas as fuel. Each type of fuel cell stack has different fuel tolerances. The lower the operating temperature of the stack, the stricter the requirements for pure fuel. For fuels other than pure hydrogen, an external fuel processing system may...
There are many novel hydrogen methods that are currently being investigated that offer the potential for higher energy density than conventional methods. These include hydrogen storage in carbon nanotubes. Carbon nanotubes are unique structures with exceptional electronic and...