Predominant Fuel Cell:
Hydrogen
Energy is alternative name for Fuel Cell. Hydrogen (H element) has
usually been called as the perfect fuel. It is a significant reserve on
earth (Ex. Water) and it is exhaustible. The utilization of hydrogen is
compatible with nature, instead of intrusive. We will never run out of
Hydrogen. After all it’s not a primary energy supply like oil and coal,
however rather a clean energy carrier like electricity. Hydrogen is
attractive because it can be stored and transported over long distances
by pipelines, whereas power lines are costly to build and engender loss
in transmission.
The
commercial production of Hydrogen by atmospheric friendly strategies
using solar energy and water with the help of catalysts that are active
and sturdy or durable, are being investigated. Systems are investigated
to use concentrated sunlight to create the heat that is required to
separate water into hydrogen and oxygen that has the potential for being
economically viable. Another type of system uses concentric solar
thermal energy to reform natural gas and steam into a mixture of carbon
dioxide and hydrogen. The method will increase the energy content of
natural gas by twenty percent with embodied solar energy. Under certain
conditions, microscopic green algae has been seen to produce sufficient
solar electricity in summer, use it to provide hydrogen and fuel of
future. One plan is to produce sufficient solar electricity in summer,
use it to produce hydrogen and oxygen from water by electrolysis, use an
equivalent (hydrogen) to produce electricity in a fuel cell in winter
and shut the cycle by recycling the water. A self reliant solar energy
house (SSSH) has been inbuilt in this manner in Germany has produced the
energy which has no grid connection.
Fuel cells are electrochemical devices that combine
hydrogen and oxygen, by setting up an electrical charge across a
membrane, which can be used to produce a steady flow of electricity with
no moving parts. A fuel cell system which includes a ‘fuel reformer’
can utilize the hydrogen from any other source like gasoline, natural
gas or methanol. Natural gas is more abundant than oil and has been less
heavily exploited so far, raising the prospect that it will be the
dominant energy source this century and could form a kind of ‘bridge’ to
hydrogen till such time as a cheaper renewable source of energy is
found for splitting water to get hydrogen.
In
space program hydrogen is used to provide all of the shuttle’s electric
power from on-board fuel cells. The fuel cells exhaust pure water is
used for drinking water by the crew.
The likely
immediate application for the fuel cells will be a fuel cell battery
combination known as a ‘hybrid’. The hydrogen fuel cell can constantly
charge the battery, which is able to run the electrical motor powering
the automobile. Fuel cells provides a lot of energy density, or the
ability to travel long distances, while batteries provide power density,
or the ability to accelerate quickly. A hybrid allows one to have both
at the same time.
Fuel
cells hold out great prospects as a conduit through which electricity
can be generated from hydrogen. Thus we have the option of
‘decarburising’ not only fossil fuels but even biogas and ‘sequestering’
the carbon dioxide from the earth.


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