Ambitious project to green the desert to begin in Jordan
Conceptual illustration of the Sahara Forest Project that will produce fresh water, electricity and food in the desert (Image: Sahara Forest Project Foundation / Screenergy)
An ambitious project that aims to turn arid desert land into a green oasis took a step closer to becoming reality last week when an agreement was signed on the rights to develop a pilot system in Jordan. The Sahara Forest Project's (SFP) first facility will be located on a 2,000,000 square meter (21,527,821 sq. ft.) plot of land in Aqaba, a coastal town in the south of Jordan where it will be a test bed for the use of a combination of technologies designed to enable the production of fresh water, food and renewable energy in hot, arid regions.
The partners behind the Sahara Forest Project are Bill Watts of Max Fordham Consulting Engineers, Seawater Greenhouse, Exploration Architecture and the Bellona Foundation, an international environmental NGO based in Norway, who have been working on the idea since 2009.
In 2009, after first studies showed that the concept was feasible and economically viable, the project was presented internationally at the December 2009 UN Climate Conference in Copenhagen, Denmark, where it was well received. In June, 2010, Jordan's King Abdullah II saw a project presentation during a visit to Norway and was impressed enough to say he was ready to facilitate its implementation in Jordan.
The main pillars of the project are saltwater greenhouses, concentrated solar energy, and cultivation of traditional crops along with energy crops such as algae, which all come together in one location to solve a whole range of environmental problems.
The SFP would use saltwater greenhouses to grow crops throughout the year in desert locations without any supply of freshwater. Seawater is evaporated from grilles at the front of the greenhouse to create cool humid conditions inside. A proportion of the evaporated seawater is then condensed as freshwater that is used to irrigate the crops, re-vegetate surrounding dry areas and provide water to the concentrated solar power plant.
The solar power plant is in turn used to generate electricity to power the pumps to transport the seawater from the Red Sea to the saltwater greenhouse and the fans to circulate the humid air within the greenhouse. The greenhouse will also be used to cultivate algae to absorb CO2 and provide biomass to be used for energy and food production.
The project partners say that, in essence, when these different technologies are put to use in a combined approach, the processes will start "feeding" each other and provide not only environmental, but also commercial benefits.
The project envisions three separate stages of development. In depth studies will be carried out throughout 2011, construction of a Demonstration Center is slated to start in 2012, and commercial-scale development is set to start in 2015.
Windstalk concept is a wind farm without the turbines
The Windstalk concept would generate electricity from the wind without turbines
Image Gallery (7 images)
Image Gallery (7 images)
Wind turbines are an increasingly popular way to generate clean energy with large-scale wind farms springing up all over the world. However, many residents near proposed wind farm sites have raised concerns over the aesthetics and the low frequency vibrations they claim are generated by wind turbines. An interesting Windstalk concept devised by New York design firm Atelier DNA could overcome both these problems while still allowing a comparable amount of electricity to be generated by the wind.
So, instead of relying on the wind to turn a turbine to generate electricity, when the pole sways in the wind, the stack of piezoelectric discs are compressed, generating a current through the electrodes. In a nice visual way to indicate how much – if any – power the poles are generating, the top 50cm (20 in.) of each pole is fitted with an LED lamp that glows and dims relative to the amount of power. So when the wind stops, the LED's go dark.
As a way to maximize the amount of electricity the Windstalk farm would generate, the concept also places a torque generator within the concrete base of each pole. As the poles sway, fluid is forced through the cylinders of an array of current generating shock absorbers to convert the kinetic energy of the swaying poles into electrical energy.
Because the electricity generation capabilities of a Windstalk field site would depend on the wind, the designers have devised a way to store the energy. Below the field of poles would be two large chambers located on top of each other and shaped like the bases of the poles but inverted, (see the cross section image of the pole base section below). When the wind is blowing, part of the electricity generated is used to power a set of pumps that moves water from the lower chamber to the upper one. Then, when the wind dies down, the water flows from the upper chamber down to the lower chamber, turning the pumps into generators.
The WIndstalk project is still only a concept, so the designers haven't determined the optimal shape for the stalks, saying computer simulations could be used to devise the best profile for maximizing the pole's movement and variation. Even so, the design team estimates that the overall electricity output of the concept would be comparable to that of a conventional wind turbine array because, even though a single wind turbine that is limited to the same height as the poles may produce more energy than a single Windstalk, the Windstalks can be packed in much denser arrays.
The Atelier DNA Windstalk concept took out second prize in the Land Art Generator Initiative (LAGI) competition this year that asked entrants to "design a series of land/environmental art installations that uniquely combine aesthetic intrigue and artistic concept with clean energy generation."
Devised as a potential clean energy generation project/tourist attraction for Abu Dhabi's Masdar City, the Windstalk concept consists of 1,203 carbon fiber reinforced resin poles, which stand 55 meters (180 feet) high and are anchored to the ground in concrete bases that range between 10 and 20 meters (33-66 ft) in diameter. The poles, which measure 30cm (12 in.) in diameter at the base, tapering up to a diameter of 5cm (2 in.) at the top, are packed with a stack of piezoelectric ceramic discs. Between the discs are electrodes that are connected by cables that run the length of each pole – one cable connects the even electrodes, while another connects the odd ones.
So, instead of relying on the wind to turn a turbine to generate electricity, when the pole sways in the wind, the stack of piezoelectric discs are compressed, generating a current through the electrodes. In a nice visual way to indicate how much – if any – power the poles are generating, the top 50cm (20 in.) of each pole is fitted with an LED lamp that glows and dims relative to the amount of power. So when the wind stops, the LED's go dark.
Because the electricity generation capabilities of a Windstalk field site would depend on the wind, the designers have devised a way to store the energy. Below the field of poles would be two large chambers located on top of each other and shaped like the bases of the poles but inverted, (see the cross section image of the pole base section below). When the wind is blowing, part of the electricity generated is used to power a set of pumps that moves water from the lower chamber to the upper one. Then, when the wind dies down, the water flows from the upper chamber down to the lower chamber, turning the pumps into generators.
The Atelier DNA Windstalk concept took out second prize in the Land Art Generator Initiative (LAGI) competition this year that asked entrants to "design a series of land/environmental art installations that uniquely combine aesthetic intrigue and artistic concept with clean energy generation."
Dr. EMAD H. ISMAEEL
Web Site: http://sites.google.com/site/emadhanee/
Tel : +964 (0)770 164 93 74
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