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[edit] Floating Solar Chimney Technology
Floating Solar Chimney Technology - An innovative cost competitive electricity production technology
A. The conventional solar chimney technology with concrete chimneys
1. Solar Chimney Technology is an electricity power generating method with the warm air produced from a large solar collector up drafting through a tall concrete chimney. The electricity production units are air turbines placed on the stream of the moving updraft warm air. The energy source is the solar irradiation arriving on the earth’s surface http://en.wikipedia.org/wiki/Solar_chimney.
2. The earliest description of a solar chimney power station was written in 1931. A model was built in 1982 in Manzaranas, Spain. The chimney, a steel concrete construction, had 10 m diameter, 195 m height and the maximum power output was about 50 kW. The power plant operated successfully for approximately 8 years establishing experimentally this power production technology.
3. The efficiency of this technology depends mainly on the chimney’s height. Height creates the main obstacle to reinforced concrete structures since they have to solve problems related to the chimney’s foundations, erection and the respective high construction costs.
4. It is characteristic that even if a chimney of 1000m height could be erected the annual efficiency could be less than 1% of the solar energy arriving on horizontal surface of its collector. Thus solar collectors should be very large and expensive.
5. In this respect the conclusion is, concerning the concrete Solar Chimney Technology, that although the technology is functioning, the construction and production cost is very high while the constructional problems related to the power production efficiency remain unresolved.
B. The innovative Floating Solar Chimney Technology
1. The proposed innovation http://www.floatingsolarchimney.gr handles the obstacle of the rigid and concrete chimney by changing the logic governing the plant. Given that the power producing natural phenomenon is based on the thermal air stream moved through the internal space of the chimney, the aim is not the chimney itself but the internal channel allowing the up drafting of the thermal air produced in its lower part by the solar collector’s greenhouse effect.
2. Instead of trying to solve problems of ground foundation, unbending, heavy and high cost solar chimney structures, it proceeds with a light structure, made of a set of lifting balloon rings filled with a lighter than the air gas and thus balancing the structure’s weight with the buoyancy forces. Thus the structure named floating solar chimney (FSC) can be higher giving to its respective Power Plant higher efficiencies (up to 5% for FSCs up to 3 Km) with a much smaller construction cost. The respective solar collectors become smaller due to the higher efficiency and thus with lower costs.
3. The construction materials for these light structures are already in the market. Light structure problems at this scale have been solved in a variety of other projects already constructed.
4. The proposed innovation constitutes the backbone of the proposed “Solar Aero-Electric Power Plants” (SAEPS) that may demonstrate construction costs ranging between 400 ÷ 700 USD/KW or even less producing at least 3000 KWh/per year per rated KW. Thus the production cost of KWh by these SAEPPs could be less than 1.5 cents of USD.
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An image or media file that you uploaded or altered, Image:FloatingSolarChimneyPowerStation.gif, has been listed at Wikipedia:Images and media for deletion. Please look there to see why this is (you may have to search for the title of the image to find its entry), if you are interested in it not being deleted. Thank you. BigrTex 22:57, 28 March 2007 (UTC)
