Environmental Engineering Reference
In-Depth Information
It is expected that the ICE will act as a transition technology while FCs are improving,
because the modifi cations required to convert an ICE to operate on hydrogen are
not very signifi cant. However, the FC, due to its virtually emission-free, effi cient
and reliable characteristics, is expected to be the generator of choice for future
hydrogen powered energy applications.
4.9.4 Fuel cell
A FC converts stored chemical energy, in this case hydrogen, directly into electri-
cal energy. A FC consists of two electrodes that are separated by an electrolyte
(see Fig. 17).
Figure 16: Energy density vs. pressure for hydrogen gas [ 2 ].
Figure 17: Fuel cell [ 29 ].
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