The Times has a special section this week on the business of sustainability. Above, columns of algae being grown for biofuel by Solena in Alicante, Spain. The section includes articles on green collar jobs, business going carbon neutral or carbon negative, Sun Edison the solar panel provider, etc.
“Ocean waves are already being used as a source of renewable energy, but could differences in water temperatures in the sea be our next source of green power? A decade old idea to generate renewable electricity for the globe with offshore, floating ‘Energy Islands’ could soon become a reality. The concept – creating artificial islands to collect wind, wave and solar power in the tropics – is based on the work of Jacques-Arsène d’Arsonval, a 19th-century French physicist, who envisioned the idea of using the sea as a giant solar-energy collector.
“Their goal is to build a network of “energy islands”: floating hexagonal-shaped platforms of reinforced concrete and corrosion-resistant metals that would generate electritict via wind, wave, and solar in addition to having an OTEC plant. It’s estimated that each island complex could produce about 250MW, and that 50,000 “energy islands” could meet the world’s energy requirements (as well as provide two tons of fresh water per person per day for the entire world population — desalinated water is one byproduct of the OTEC process). OTEC plants work best when there’s a temperature difference of 20°C between water at the surface and the water below, making tropical and sub-tropical seas the best candidates for energy islands.”
The Winner of the 2004 ‘Eco Boulevard”competition by ecosistema urbano from Spain.
The Times reports on the scrapping of plans for an emmisions-capturing coal power plant from the DOE. It’s a shame that budget concerns have tanked the project, but there are some interesting bits of information here about the technology involved.
A new material, nano flakes, may revolutionise the transformation of solar energy to electricity. If so, even ordinary households can benefit from solar electricity and save money in the future.