Fuel Cell - Electricity from Hydrogen
Fuel Cell is an electrochemical transducer, continuously operated, composed of a series of Fuel Cells, which convert chemical energy into electrical energy by combining an oxygen atom with two hydrogen atoms. In addition to the electrical energy it produces thermal energy and water. In its current stage of evolution this occurs with low environmental impact and its operation is highly energy efficient.
It is of continuous operation as it generates electricity while the fuel and oxidant are supplied, without ever ‘losing the charge’, as with ordinary chemical batteries and batteries.
Of low environmental impact, especially when compared to systems that operate under the burning of fossil fuels, also known as mineral fuels or hydrocarbons, because it does not emit particulates, acid gases, its operation is without vibrations and noise and does not produce gases of the greenhouse effect.
The energy efficiency of its operation is high because it directly converts chemical energy into electrical energy, this means that, for example, there is no combustion during the process thus, it does not operate under the thermodynamic limitations of the Carnot Cycle, such as a combustion engine Energy efficiency of 30 to 55% of the lower calorific value of the fuel it uses – this efficiency can reach 70% when part of the thermal energy generated in the process is recovered. The absence of mechanical losses, related to the movement of components, is another factor that contributes to its efficiency.
Association of Cells in Fuel Cell
The series association of the Cells produces the increase of the electrical voltage also known as the electrical potential difference, popularly called the voltage, of the system; In turn, the parallel association of these cells produces the increase of the electric current, popularly called amperage, as a function of the increase of the area for the exchange of electrons.