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The thermoelectrial plants concentrate solar rays on a fluid that reaches the boiling degree; the steam is used to move a turbine, that generates electricity.
According to calculations of the solar Platform of Almeria, a plant of this annual type avoids 2000 metric ton of CO2 emissions by each MW. Installed.
One is not a technology in investigation; its effectiveness is more than verified, although their costs of installation, superior to those of a conventional thermal power station - based on the combustion -, are restraining their expansion at commercial level.
Configurations of solar concentration
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| Cylindrical-parabolic collectors |
Plant with central receiver |
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Cylindrical-parabolic concentrators:concave mirrors -curved in channel form that concentrate their radiation on a tube that transports oil that reaches discharges temperatures. Several power stations in the world exist, specially in California, most comprises of investigation projects and they are not exploded commercially. Its character of cycle combined with ombustión of gas makes more productive.
Central receiver in tower: a field of heliostatos that follow the Sun automatically and orient the ray towards a receiver located on a tower. The power of the power station goes of 10 to 200 MW. Its function until now has been merely of investigation.
Parabolic discs:not very frequent. They have form of satellite dish and its power tip oscillates between 5 and 25 kW. One still is in phase of investigation.
Present situation of the thermoelectrc solar energy
More technological advances are not necessary. The technology is there, hoping the investment to produce great amounts of electricity. The only limitation is geographic then, logically, its productivity this based on its latitude and of the climatology to which they estan put under, reason why the regions where its future appears more promising is in the southwestern zone of E.E.U.U., Central America and of the South, Africa, Near East, Mediterranean Europe, Iran, Pakistan, and the desert regions of India, the Russian, Chinese Federation and Australia.
Spain is by extension and latitude, the European country with more potential it solar energy, reason why the thermoelectrial one is outlined like one of our options of future in the sector of the energy.
According to Greenpeace "the operation of less of 1% of the world-wide thermal solar potential would be sufficient to stabilize the world-wide climate by means of massive reductions of CO2"
This technique can also be used for industrial processes or industrial air conditioning, although at the moment still investigations are being developed that aim towards an optimization of industrial equipment to combine with this system.
In fact, it already exists in project in the province of Seville a power station of central the Receptor type in tower, of Solar the Abengoa company, that will be installed Sanlúcar the Greater one, and will receive like name "PS10". It will be the first power station of the world created by a company, because las centrales in operation they belong a proyectos de investigación solely.
Iberdrola, on the other hand, already has predicted the installation within our territory of nine thermoelectrial solar plants of type cylindrical-parabolic concentrator of 50 MW. each one.
a proyectos de investigación.
It is of preveer that some countries, like the meridionals of Europe or the Magreb, specialize in its commercialization and they export it, with a demand that suspects flood due to the raised one the prices of fossil fuels. |
