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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:01 |
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Conference: Bucharest University Faculty of Physics 2018 Meeting
Section: Physics and Technology of Renewable and Alternative Energy Sources
Title:
The determination of fuel cell efficiency
Authors:
Ciprian-Bogdan MITREA, Sanda VOINEA
Affiliation:
University of Bucharest, Faculty of Physics, P.O.Box MG-11, Magurele, 077125 Bucharest, Romania
E-mail
sanda.voinea@3nanosae.org
Keywords:
fuel cell, efficiency, polarization curve
Abstract:
The emergence of technology is due to the man's need to simplify and automate a number of processes. Since the eighteenth century, fossil fuel consumption has increased. Fossil fuels have many disadvantages that translate into a negative impact on the environment. Mankind has to focus its attention on clean energy sources. Of all non-polluting energy sources, fuel cells have the most advantages and uses. The present paper aims to determine the most efficient fuel cell model. This process of efficiency determination is carried out, taking into account the characteristics of the cells, by numerical and graphical comparison of the voltage, current and power values, as well as by the efficiency calculation. The fuel cells analysed here are: H2/O2, ethanol and magnesium with salt water. The reactions that occur in the fuel cells are analyzed from the thermodynamics point of view. For the following situations: the H2/O2 fuel cell with different sources of hydrogen and oxygen, the ethanol fuel cell with different ethanol concentrations and different temperatures, and the magnesium with salt water fuel cell with different temperatures and concentrations of salt water solution the polarization curves are measured. We obtained that the efficiency of fuel cells depends on the concentration of fuel and also of the work temperature.
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