Environmental Engineering Reference
In-Depth Information
Liquid hydrogen fuel powers the
rockets of the U.S. space shuttle.
Carrying Energy
Hydrogen can also be
used as a fuel carrier,
or energy carrier. An
energy carrier is a
substance that moves
energy in a usable
form from one place
to another.
As a fuel, the
hydrogen is used in the
form of a gas or liquid.
It is called a secondary
energy source because
another form of energy
is needed to produce
the hydrogen fuel. The
other form of energy
is a primary energy
source, such as natural
gas, water, coal, or oil.
These energy sources go through different types of processes
that allow hydrogen fuel to be made. Electricity is another
common example of an energy carrier and secondary energy
source. It, too, requires the use of some other type of energy
Search WWH ::




Custom Search