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Alternative Energy- Solar Thermal Energy
Transcript of Alternative Energy- Solar Thermal Energy
1. Photovoltaic systems-
turning the sun's light into
2. Solar thermal systems-
turning the sun's heat
into electricity What is Solar Energy? Solar Thermal Technology In Use- Active Who uses this energy? Thermal Solar Energy Joy Lee, Michelle Tran, Stephanie Lee, Caroline Manik Sources Solar energy is used by:
Individuals (Residential)- for water heating systems; choose solar energy for financial benefits
Commercially (Industrial)- have large walls for STE panels; use power because it easy to power remote locations
i.e. lighthouses, aircraft warning light structures, and increasingly in road traffic warning signals Martinez, A. R. (n.d.). History of Solar Technology. Renovetec. Retrieved January 24, 2013, from http://www.solarthermalpowerplant.com/hi
Opperman, J. (2009, September 18). Report: Future Bright for Solar Thermal - NYTimes.com. Energy and Environment - Green Blog - NYTimes.com. Retrieved January 22, 2013, from http://green.blogs.nytimes.com/2009/09/18/report-future-bright-for-solar-thermal/
Partnering for future. (Nov 27, 2012). Oil & Gas News, Retrieved January 24, 2013, from Global Reference on the Environment, Energy, and Natural Resources via Gale:http://find.galegroup.com/grnr/start.do?prodId=GRNR
Renewable Energy Sources in the United States. (n.d.). National Atlas home page. Retrieved January 22, 2013, from http://nationalatlas.gov/articles/people/a_energy.html
Uses of Solar Energy | Solarbuzz. (n.d.). Solarbuzz | Solar Market Research and Analysis. Retrieved January 22, 2013, from http://www.solarbuzz.com/going-solar/using/uses In Use-Passive Who uses this energy? (Cont.) Remote Application:
Remote buildings, such as schools, community halls, and clinics, can benefit from solar energy. In developing regions, central power plants can provide electricity to homes through a local wired network, or act as a battery charging station where members of the community can bring batteries to be recharged. History/Cutting Edge Tech The Solar Energy has been used for several centuries ago for different functions. But in the Industrial Revolution, it was replaced for crude oil. Currently, due to high crude oil costs and its great environmental impact, we are gradually returning to use of solar energy. If crude oil had not replaced the solar energy, we would have more technology in renewable energy. Long-Term Projections Solar energy overall contributes to 1% of U.S. energy needs which reflects the lack of study that has happened since its introduction in the early 20th century. Nonetheless, certain studies in solar thermal technology indicate a focus on improving the efficiency of solar thermal systems. So far, the innovation HelioTrough won in the Concentrated Solar Power Innovation Category. It is projected that with this century more industrial buildings, like the 2009 Sierra Sun Tower in California will be constructed. Not only here, there has been speculation that solar thermal systems will be introduced in Europe and the Middle East by means of utilizing solar reflectors. Barriers Countries Emphasizing Its Use Environmental concerns: Manufacturing process of solar thermal power plants requires a lot of fossil fuels which leaves significant impact on the environment.
Storage issue: Solar thermal power plant produce electricity only when the sun is shining so an effective energy storage is needed to use the energy produced when it's cloudy or dark outside.
Water usage: Solar thermal power plant requires water to power the generator as well as cooling and washing the equipment. Because it requires so much (up to 27,000 gallons per MW using "older cooling system) that choices to place location will be limited.
- China and in ancient Greece: mirrors or glass to reflect the sunlight for making fires.
- Early twentieth century: simple machines - invented that could run from the concentration of the sun's heat.
- 1913, the American Frank Shuman developed the first solar thermal pumping station in Meadi, Egypt. This system worked with 5 large reflectors, each one had 62 meters long and they contained glass mirrors making a cylinder-like parabola. Each reflector focused the sunlight on a tube along its length, heating the water that flowed inside them. In that process, steam was generated and it was used to feed a motor connected to a pump.
-Solar Thermal Energy modern history began on 1970s crude oil crisis.
- 1984, in California the first plant SEGS-1 was built: these plants operate with a parabolic trough solar collector system. They convert solar energy into heat which warms the oil that flows through the absorber tubes of solar collectors. Hot oil is sent to a heat exchanger which generates superheated steam required to activate a turbo-alternator, and that is how electricity is produced. Spain: world leader in highest capacity in solar thermal power (582MW as of 2011).
California: according numbers from 2010, California ranked number one for highest capacity of solar thermal power with 365MW.
*Germany has capacity almost 10 times greater than that of United States.