Air driven cars
We had earlier written of the flying and
sailing cars, one of the greatest innovations happening in the motor
industry. Today, we are looking at cars that can drive themselves, a
possible venture that could in the near future replace what we have
already.
Inasmuch as all these innovations are
being done, others elsewhere seek to develop an alternative fuel for the
cars. Fuel is a global issue as we tend to spend more than we can
produce not forgetting the effects it causes to the environment.
Electricity and hydrogen have been
discovered as alternatives to fossil fuels which are in use in all parts
of the world. The cars are considered environment friendly and are a
solution to global warming resulting from combustion of fuels in
vehicles.
The hydrogen-powered cars are gaining a
lot of popularity in some countries like the United States of America.
They are considered cleaner than the conventional cars and would be the
solution to air pollution in the cities. Hydrogen-powered cars rely on a
fuel cell that takes oxygen from the air and combines it with hydrogen
from a tank to create electricity. The electricity is used to power
electric motors which turn the car wheels. As such, hydrogen-powered
cars can be seen as electric vehicles that are not held back by the
limited range of batteries.
These cars use the hydrogen fuel cell
technology which was first developed in 1839. The cells were mostly used
for back-up of power and in remote places that are inaccessible to the
national grid. They have however been adopted by motor industry and are
being used to power vehicles.
A fuel cell combines hydrogen and oxygen
to produce electricity, heat, and water. Fuel cells are often compared
to batteries. Both convert the energy produced by a chemical reaction
into usable electric power. However, the fuel cell will produce
electricity as long as fuel (hydrogen) is supplied, never losing its
charge.
Different car makers are optimistic
about the technology and are endorsing producing this type of cars.
General Motors surprised observers when the company presented a
fifth-generation fuel cells. Compared to fourth-generation fuel cells,
the weight of the entire unit has been reduced by 100 kilograms, while
the unit takes up 50% less space (and is thus comparable to a
four-cylinder petrol engine). Similar advances are being made by
Daimler, Toyota, Honda, Nissan and Hyundai, with Ford and Volkswagen
following in their tracks.
The cars can only be filled in a
hydrogen station. The stations are normally set at the highways. The
hydrogen fuel dispensers dispense the fuel by the kilogram.
The fuel cell cars are better preferred
than the electric cars which over a long range will need a lot of
batteries. The fuel cells spew out nothing more noxious than water
making them even friendlier to the environment.