This article is about electricity power generation by downdraft created by evaporation of water sprayed at the top of a tall hollow cylinder. For other uses, see Energy tower (disambiguation).
Sharav Sluice Energy Tower An energy tower is a method for producing electrical power for consumer consumption, the brainchild of Dr. Phillip Carlson,[1] which has been expanded upon by Professor Dan Zaslavsky from the Technion.[2] An energy tower produces electricity by drawing the energy from the air around it. Energy tower may refer to: electricity power generation by downdraft created by evaporation of water sprayed at the top of a tall hollow cylinder, see Energy tower (downdraft) solar power plant technology using mirrors, see Solar power tower electricity power generation by solar-heated air in a chimney-style tower...
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For delivered electrical power, see Electrical power industry. ...
The Technion - Israel Institute of Technology (×”×˜×›× ×™×•×Ÿ - מכון ×˜×›× ×•×œ×•×’×™ לישר×ל) is a university in Haifa, Israel. ...
Concept summary
An energy tower is a tall hollow cylinder with a water spray system at the top. The water is pumped up to the top of the tower and then sprayed inside the tower which cools the warm air hovering at the top. The cooled air, being denser than the outside warmer air, falls to the bottom of the cylinder which causes a turbine at the bottom of the cylinder to spin. The turbine is connected to a generator which produces the electricity. The need for large quantities of water may be solved by choosing a location that is not too far from the coast.[3]
The tower should optimally be situated in a hot dry climate, which thus allows for the greatest extraction of energy from the air. The hot, dry climate of the horse latitudes is caused by the Hadley cell circulation that is driven by solar heating, which on average is largest near the equator and smallest at the poles. Therefore, the energy that is extracted from the air is ultimately derived from the Sun, so this can be considered a form of solar power. It is a form of solar power that has the peculiar advantage of also working at night. However, power generation by the Energy tower is affected by the weather: it slows down each time the ambient humidity increases (such as during a rainstorm), or the temperature falls. Horse latitudes or Subtropical High are subtropical latitudes between 30 and 35 degrees both north and south, characterized by light winds and hot, dry weather, caused by descending air. ...
The Hadley cell is a circulation pattern that dominates the tropical atmosphere, with rising motion near the equator, poleward flow 10-15 kilometers above the surface, descending motion in the subtropics, and equatorward flow near the surface. ...
Solar power describes a number of methods of harnessing energy from the light of the sun. ...
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In a thermodynamics problem, the surroundings, or environment, are anything not part of the system. ...
Humidity is the amount of water vapor in air. ...
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An alternative approach to this is the solar updraft tower, which would require huge (up to 7 or 8 kilometres in diameter) agricultural glass house collectors to capture the solar heated air. Even though energy towers use some energy (about 50% of the turbine output) by having to pump water to the top and pressurizing nozzles, their advantage is that they require no such large collection areas, because dry air, if available, is continuously drawn at the top from the surroundings. Schematic of a Solar updraft tower This article is about a type of power plant. ...
A kilometre (American spelling: kilometer) (symbol: km) is a unit of length equal to 1000 metres (from the Greek words khilia = thousand and metro = count/measure). ...
Implementation Currently, no known physical implementation of an energy tower exists.
Projections made by Altmann[4] and by Czisch[5][6] about conversion efficiency and about Cost of Energy (cents/kWh) are based only on model calculations[7], no data on a working pilot plant have ever been collected. Actual measurements on the 50kW Manzanares pilot solar updraft tower found a conversion efficiency of 0.53%, although SBP believe that this could be increased to 1.3% in a large and improved 100MW unit.[8] This amounts to about 10% of the theoretical limit for the Carnot cycle. It is not unreasonable to expect a similar low conversion efficiency for the Energy tower, in view of the fact that it is based on a similar principle as the solar updraft tower. It is worrisome that Zaslavsky claims instead that the Energy Tower would achieve up to 70-80% [9] of the Carnot limit. If the conversion efficiency turns out to be much lower it is expected to have an adverse impact on projections made for Cost of Energy. This page meets Wikipedias criteria for speedy deletion. ...
Schematic of a Solar updraft tower This article is about a type of power plant. ...
The world-renowned structural engineering firm of Schlaich Bergermann & Partners, based in Stuttgart, Germany. ...
The Carnot cycle is a particular thermodynamic cycle, modeled on the Carnot heat engine, studied by Nicolas Léonard Sadi Carnot in the 1820s and expanded upon by Benoit Paul Émile Clapeyron in the 1830s and 40s. ...
Schematic of a Solar updraft tower This article is about a type of power plant. ...
Potential Problems - If salt water is used, corrosion rates can be very high. Not only would the tower and the turbines be subjected to the salty humid air, but anything nearby or downwind a bit could be affected.[10]
- The technology requires a hot and arid climate, and at the same time access to large amounts of water. This poses restrictions to where these plants could be built, such as along the coast of West Africa, Western Australia, northern Chile, Namibia, and along the Red Sea, Persian Gulf, and the Gulf of California. Most of these regions are remote and thinly populated, and would require power to be transported over long distances to where it is needed.
Western Africa (UN subregion) Maghreb[1] West Africa or Western Africa is the westernmost region of the African continent. ...
Slogan or Nickname: Wildflower State or the Golden State Other Australian states and territories Capital Perth Government Constitutional monarchy Governor Ken Michael Premier Alan Carpenter (ALP) Federal representation - House seats 15 - Senate seats 12 Gross State Product (2004-05) - Product ($m) $100,900 (4th) - Product per capita $50,355/person...
Location of the Red Sea The Red Sea is an inlet of the Indian Ocean between Africa and Asia. ...
Map of the Persian Gulf. ...
The Gulf of California (also known as the Sea of Cortez or Sea of Cortés; locally known in the Spanish language as Mar de Cortés or, much less frequently, Golfo de California) is a body of water that separates the Baja California Peninsula from the Mexican mainland. ...
See also Schematic of a Solar updraft tower This article is about a type of power plant. ...
Solar Heat Pump Electrical Generation System is a concept researched and developed as an open design project. ...
For the parapsychology phenomenon of distance knowledge, see psychometry. ...
References - ^ US3,894,393 (PDF version) (1975-07-15) Carlson; Phillip R. Power generation through controlled convection (aeroelectric power generation)
- ^ Zaslavsky, Dan; Rami Guetta et al. (December 2001). "Energy Towers for Producing Electricity and Desalinated Water without a Collector"PDF (435 KiB). Technion Israel, Israel - India Steering Committee. Retrieved on 2007-03-15.
- ^ Altman, Talia; Dan Zaslavsky, Rami Guetta and Gregor Czisch (May 2006). Evaluation of the potential of electricity and desalinated water supply by using technology of "Energy Towers" for Australia, America and Africa. Retrieved on 2007-03-18.
- ^ Altmann, T.; Y. Carmel, R. Guetta, D. Zaslavsky, Y. Doytsher (June 2005). "Assessment of an "Energy Tower" potential in Australia using a mathematical model and GIS". Solar Energy 78 (6): 799-808. Elsevier Ltd.. DOI:10.1016/j.solener.2004.08.025. Retrieved on 2007-03-12.
- ^ Czisch, Gregor (June 2005). Evaluation of the global potential of energy towers. Retrieved on 2007-03-13.
- ^ Czisch, Gregor (September 2001). Aeroelectric Oasis System. Global Renewable Energy Potential, Approaches to its Use. Retrieved on 2007-03-13.
- ^ Gutman, Per-Olof; Eran Horesh, Rami Guetta, Michael Borshchevsky (2003-04-29). "Control of the Aero-Electric Power Station - an exciting QFT application for the 21st century". International Journal of Robust and Nonlinear Control 13 (7): 619 - 636. John Wiley & Sons, Ltd.. DOI:10.1002/rnc.828. Retrieved on 2007-03-12.
- ^ Mills D (2004). "Advances in solar thermal electricity technology". Solar Energy 76 (1-3): 19-31. DOI:10.1016/S0038-092X(03)00102-6.
- ^ Zaslavsky, Dan (2006). "Energy Towers". PhysicaPlus - Online magazine of the Israel Physical Society (7). Israel Physical Society. Retrieved on 2007-03-13.
- ^ Zwirn, Michael J. (January 1997). Energy Towers: Pros and Cons of the Arubot Sharav Alternative Energy Proposal. Arava Institute for Environmental Studies. Retrieved on 2006-12-22.
- Zaslavsky, Dan (November, 1996). "Solar Energy Without a Collector". The 3rd Sabin Conference.
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