The Oil Drum: Europe

The Guardian has an interesting article on the rapid build-out of renewable energy generation in Portugal. The country seems to be determined to become free of dependency on fossil fuels as soon as possible, with the country's energy minister also sagely pointing out "When you have a programme like this there is no need for nuclear power. Wind and water are our nuclear power".

The country currently has Europe's largest solar power plant, is constructing Europe's largest wind farm and is on the leading edge of research into wave and tidal power. The obvious question is - if Portugal can do this, why can't we ? This applies more to Australia than New Zealand obviously...

Last year I came across the story of Dutch company Kema and their energy island idea - basically a variant on the usual pumped hydro energy storage concept where water is pumped out of a space below sea level then allowed to flow back in, generating power as it does. The "island" uses wind power to pump water out of the enclosed area. An obvious extension to this idea would be to harness ocean energy as well - letting wave and/or tidal power supplement the output of the wind turbines. An attraction of this concept is that it potentially allows a large amount of new energy storage to be brought online - and this storage would be along the world's coastlines, where most of the population lives.

Another form of energy island has been in the news recently, this one a substantially more ambitious proposal which envisions artificial islands to collect wind, wave, ocean current and solar power in the tropics, along with a more unusual energy source - harnessing the difference in water temperatures between the warm surface and the cold depths using a technique called OTEC (Ocean Thermal Energy Conversion).

The energy gap left by declining fossil Solar fuels may be filled by alternative sources of energy. In short, the Earth has ample supplies of energy to sustain human population and economic growth. Discuss....

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