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Via: www.statoilhydro.com

StatoilHydro has decided to build the world’s first full scale floating wind turbine, Hywind, and test it over a two-year period offshore Karmøy. The The company is investing approximately 400 million NOK. Planned startup is autumn 2009. HyWind is based on floating concrete constructions familiar from North Sea oil installations. In this way we exploit the wind where it is strongest and most consistent — far out to sea. The project combines known technology in an innovative way. A 2.3 MW wind turbine is attached to the top of a so-called Spar-buoy, a solution familiar from production platforms and offshore loading buoys.  READ MORE »

Via: Abitare - international design magazine 

by Herzog & de Meuron, Jacques Herzog
London School of Ecomics, Ricky Burdett
Stefano Boeri Architetti, Stefano Boeri
William McDonough + Partners, William McDonough

1.
Over the past few months we have worked with EXPO SpA, the local institutions and the BIE (Bureau International des Expositions) to create a revolutionary new concept of the world exposition. We are convinced that a visionary and successful EXPO has to abandon the outmoded idea of an exposition built around complex systems of representation and gigantic architectural monuments which often have no real purpose after the event. Instead EXPO 2015 will be remembered for giving visitors a direct and immediate experience of all aspects of the question of food. It will be an EXPO that embodies its theme-Feeding the Planet, Energy for Life-directly within its own space, with none of the usual simulations and documentation that can easily be found today on any computer. Secondly, it will be an EXPO that overturns the whole concept of monumentality: in place of giant structures (like the Eiffel Tower of Paris 1898), Milan will build a new landscape of monumental lightness and natural beauty. An environment that reflects the environmental sustainability, technical precision and haunting beauty of Venice’s winding alleys, Leonardo’s canals and the open countryside of rice fields and vineyards. The EXPO we envisage will be a Planetary Botanical Garden open to the citizens of Milan and the world. A place for a fresh encounter between farming and the city that will feed Milan literally, spiritually and intellectually. A vast agrofood park built on an orthogonal grid, surrounded by water ways and punctuated by striking landscape architecture.  READ MORE »

The Process

The Seawater Greenhouse uses the sun, the sea and the atmosphere to produce fresh water and cool air. The process recreates the natural hydrological cycle within a controlled environment. The entire front wall of the building is a seawater evaporator. It consists of a honeycomb lattice and faces the prevailing wind. Fans assist and control air movement. Seawater trickles down over the lattice, cooling and humidifying the air passing through into the planting area.

Sunlight is filtered through a specially constructed roof, The roof traps infrared heat, while allowing visible light through to promote photosynthesis. This creates optimum growing conditions - cool and humid with high light intensity.

Cool air passes through the planting area and then combines with hot dry air from the roof cavity. The mixture passes through a second sea water evaporator creating hot saturated air which then flows through a condenser.

The condenser is cooled by incoming seawater. The temperature difference causes fresh water to condense out of the air stream. The volume of fresh water is determined by air temperature, relative humidity, solar radiation and the airflow rate. These conditions can be replicated in the thermodynamic model and, with appropriate meteorological information, the detailed design and performance of the Seawater Greenhouse can be optimised for every suitable location and environment.  READ MORE »

Via the website of New York Sun Works - Sustainable Engineering

See the Video 

What is the Science Barge?

The Science Barge is a prototype, sustainable urban farm and environmental education center. It is the only fully functioning demonstration of renewable energy supporting sustainable food production in New York City. The Science Barge grows tomatoes, cucumbers, and lettuce with zero net carbon emissions, zero chemical pesticides, and zero runoff. It is powered by solar, wind, and biofuels, and irrigated by rainwater and purified river water.  READ MORE »

Harnessing the current: An artist's rendition of how a commercial VIVACE system might look. Passive bars, positioned horizontally, are boxed together in a single unit that could be placed at the bottom of a river or in the path of an ocean current. Dozens of 500-kilowatt units could be grouped together in different configurations to create multimegawatt systems.
Credit: Vortex Hydro Energy 

The world's river and ocean currents carry an enormous amount of kinetic energy, but most of this water flows slower than four miles per hour. Existing turbine and water-mill technologies can't generate enough electricity at such speeds to make their deployment economically viable.

Researchers at the University of Michigan say that they have overcome this limitation by taking advantage of energy-packed vortices that are formed when water flows past a cylindrical object, even at low speeds. Salmon and trout are known to leverage the force created by these naturally occurring water swirls so that they can swim upstream. A new mechanical device designed to economically harvest that energy and convert it into electricity could turn waterpower into a much larger part of the world's renewable-energy mix.

"Anywhere we have currents, we can use it," says Michael Bernitsas, a professor in the department of marine engineering at the University of Michigan. He says that the first test of the device will be in the Detroit River, likely in 2010. "If we make it work, and I believe it will, it's going to be a major development," he says.  READ MORE »