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Hydro to Extend Utsira Wind/Hydrogen Project to Spring 2008

The Utsira Project

Hydro and its partner Enercon have decided to extend their combined wind power and hydrogen facility on Utsira until spring 2008. The demonstration project on the island Utsira off the coast of western Norway started operating in summer 2004 and was originally scheduled to run two years.

Two wind turbines at the combined wind and hydrogen plant on Utsira produce power for 10 households. Surplus electricity is stored in the form of hydrogen produced via electrolysis. When the wind doesn’t blow, a hydrogen motor and fuel cell convert the stored hydrogen back into electricity.

The partners have decided that there is still much valuable experience to gain, together with the need to test new components and solutions for use on future facilities. Among other plans are testing of new internally designed electrolyzer technology at the facility.

The Utsira project has provided us lots of valuable experience in an area that the entire world is interested in and where Hydro is at the forefront of development. We now want to make some adjustments and try out new technological solutions to optimize the facility.

—Ulf Hafseld, business development manager, Hydro New Energy

Original Utsira Elements
Component Parameter
Wind turbines 2 Enercon 0.6 MW Wind turbines
Flywheel (grid stabilization) 5 kWh
Master Synchronous Machine (grid stabilization) 100 kVA
Hydrogen engine 55 kW (top load)
Fuel cell 10 kW
Electrolyzer 10 Nm3/h, 48 kW
Compressor 5.5 kW
Hydrogen storage capacity 2,400 Nm3


Tomi Engel

While your picture contains the full "details" your table lacks one of the core parts.
The batteries with 100 kWh of stoarge. media_room/presentations/essen_feb04_ingunnmoe.pdf

tom deplume

Will someone explain what Nm3 means. I know that Nm is a measure of torque but adding the 3 puzzles me.


Two very different units. Nm (Newton-meters) is a measure of torque. Normal cubic meter (Nm3--I can't use the bloody superscript in the comments) is a unit of mass for gases equal to the mass of 1 cubic meter (35.3147 ft3) at a pressure of 1 atmosphere and at a standard temperature, often 0 °C (32 °F) or 20 °C (68 °F).

It's confusing...and actually, although Nm3 for normal cubic meters is commonly used, it's not in keeping with the international system of units (SI). So we'll use m3 (normal) in the future.

tom deplume

So metric uses Normal Cubic meter while we primitive Americans use Standard Cubic Feet. The only true indication of the energy content of a gas is its mass which doesn't change according to pressure or volume.

John Finlayson-Fife

The relative capacities of some of the system components doesn't make sense to me. Two 600kW wind turbines. Assuming a capacity ratio of 0.3, that's an average of 360kW of combined output. What are they doing with all that power? The 10 households only accounts for a 55kW load. The electrolyser can use another 48kW. On the face of it, it would appear that they're over-windmilled. What am I missing?

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