Turning wind power into hydrogen

Turning wind power into hydrogen

PILOT PROJECT SEEKS A WAY TO LINK TWO CLEAN TECHNOLOGIES
By Steve Raabe
MediaNews

BOULDER, Colo. - Amid gusting winds and spinning wind turbines, officials last week
unveiled a $2 million research project to use wind energy to produce hydrogen fuel.

The technology proposes to take clean energy to a new level, using a renewable resource,
wind, to make a non-polluting fuel, hydrogen, in one of the nation's first attempts to
combine the two energy resources.
It's a part of President Bush's $1.2 billion hydrogen fuel initiative designed to help
wean the United States from imported oil.

The concept is simple: Make hydrogen when the wind is blowing, then store the fuel for
use whenever it is needed.
The science behind the concept is nearly as simple. Electricity from wind turbines is
used to break down water into hydrogen and oxygen. The hydrogen is captured and stored,
then used either to generate power or as a high-tech fuel for vehicles.

The research is a joint project of Xcel Energy and the Golden, Colo.-based National
Renewable Energy Laboratory. Officials said the process may not be commercially feasible
for at least eight years.
``Today we begin using our cleanest source of electricity -- wind power -- to create the
perfect fuel: hydrogen,'' Xcel Chief Executive *** Kelly said Thursday at the federal
laboratory's National Wind Technology Center south of Boulder.

``Converting wind energy to hydrogen means that it doesn't matter when the wind blows,''
he said, ``since its energy can be stored on site in the form of hydrogen.''

The research project is expected initially to generate only relatively tiny amounts of
hydrogen -- about 17 kilograms a day. Each kilogram has roughly the same energy content
as a gallon of gasoline.
The produced hydrogen will be used to generate small amounts of electricity. In the
future, if commercial-scale production can be achieved, scientists say hydrogen's most
economical use will be as a vehicle fuel, for either internal-combustion engines or
fuel-cell-powered cars.

Fuel cells use a chemical process to convert hydrogen to electricity.
Energy lab and Xcel officials said initial hydrogen production costs are expected to be
about $8 a kilogram, making the process more than three times as expensive as using
gasoline to run a car.
But by 2020, or perhaps earlier, they expect costs to drop to $2 to $3 a kilogram, in
the range of current gasoline prices.

The added benefit of using hydrogen to power fuel cells is there are no emissions and
the only byproduct is water.
``It has the potential,'' said renewable-energy lab director Dan Arvizu, ``to point the
way to a completely emissions-free system of making, storing and using energy.''



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