The Torresol Energy Gemasolar plant in Fuentes de Andalucia near Seville. The unique thermosolar power station in southern Spain can shrug off cloudy days: energy stored when the sun shines lets it produce electricity even during the night.
Reason to Be Selected
The heliostat with a 120m2 reflective surface area, with excellent optical characteristics and high pointing precision, used by Gemasolar. The H-54 heliostat, of 180 m2, which, having been tested and trialled at Gemasolar, has been incorporated into the solar field of the Noor III plant in Morocco.
Highlights:The molten salts receiver with the capacity to operate with high fluxes of incident solar radiation, and provide much greater thermal efficiency than its predecessors. Furthermore, SENER has developed and validated the design criteria for this pioneering thermal storage system, with working temperatures of more than 500ºC.
The mechanism is "very easy to explain," he said: the panels reflect the suns rays on to the tower, transmitting energy at an intensity 1,000 times higher than that of the sun's rays reaching the earth.
Energy is stored in a vat filled with molten salts at a temperature of more than 500 degrees C (930 F). Those salts are used to produce steam to turn the turbines and produce electricity.
It is the station's capacity to store energy that makes Gemasolar so different because it allows the plant to transmit power during the night, relying on energy it has accumulated during the day.
As a result, the plant produces 60 percent more energy than a station without storage capacity because it can work 6,400 hours a year compared to 1,200-2,000 hours for other solar power stations, he said.