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A four-module PEM fuel cell stack was electrochemically characterized prior to its incorporation to a hybrid power plant of an electrical utility vehicle. The 3 kW fuel cell stack, comprised of 4 units of 100 membrane electrode assemblies (MEAs) in an open-cathode and air-cooled configuration, was characterized in order to identify its optimum operational parameters. The open cathode configuration...
It was found that when a mixture of hydrogen and oxygen in the fuel gas stream is injected, either gasoline or diesel, it increases its combustion efficiency decreasing at the same time the pollutant emissions of fuels without burning into the atmosphere and saving from 10 up to 30% on fuel. In order to obtain this gaseous mixture, reactors oxyhydrogen operating in conditions in which the engine operates...
The present work describes the thermal efficiency optimization of parabolic trough collectors by combining a model of artificial neural network and computational optimization techniques. A feedforward neural network architecture is trained using experimental database from parabolic trough collector operations. Rim angle, inlet and outlet fluid temperatures, ambient temperature, water flow, direct...
Biomass waste for hydrogen production is an important goal for the Hydrogen Economy. In this paper is reported the research of corn cob and stem of faba bean agricultural waste by hydrolysis for sugar production. Acid hydrolysis was performed in 1 g of dried raw material per 15 mL of different H3PO4 acid solutions heated at 100°C and 130°C during 2 h. The sugar yield was determined by dinitro salicylic...
Polymer electrolyte membrane fuel cells (PEMFCs) have the potential to play a major role as energy sources for transportation and portable applications because they feature high power density at relatively low operating temperatures. Bipolar plates are a key component of PEMFCs in terms of cost and weight. To date, many different materials for bipolar plates have been investigated and an alternative...
This paper shows a comparative analysis of the effect of the machining angle through the simulations of non-isothermal multidimensional fields flow though electrodes for proton exchange membrane (PEM) cell. Different designs of channel (coil, parallel and pin-type), positions of the inlet feed gas, just as the effect of curvature machined into different sections of the channels according to some relevant...
Sulfonated styrene-acrylic acid copolymers have been used as an alternative polyelectrolyte membrane for applications in fuel cells. In this work, the raw copolymer has been prepared by a well studied solution copolymerization reaction method, but at two different capacity reactor conditions: 100 mL and 3 L. The main idea was to scale up the copolymer production for having enough material for future...
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