Seems to me we do more of this in the sunny parts of the US.
link:
http://www.power-technology.com/projects/Seville-Solar-Tower/A futuristic looking 11MW solar tower has been completed is being built near Seville, Spain as part of a 300MW solar power project.
Located in the Andalusian countryside in the municipality of Sanlucar la Mayor, the 40-storey high concrete tower collects sunlight reflected by a field of 624 huge mirrors. The light is so intense that it lights up dust and water vapour in the air. The project has been widely described as looking like something out of a sci-fi movie.
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The 'Solar Platform' is being constructed by Solucar, and will use a range of solar technologies. The first two power plants to be brought into operation were the PS10, the world's first commercial thermoelectric solar tower, and Sevilla PV, the largest low concentration system photovoltaic plant.
"The light is so intense that it lights up dust and water vapour in the air."
Costing around €1,200m, the whole plant will be completed by 2013, when it will produce around 300MW – energy for around 180,000 homes, equivalent to the needs of the city of Seville. It will then prevent emissions of more than 600,000t of CO2 into the atmosphere per year over its 25-year life. The platform will create more than 1,000 jobs in the manufacturing and construction phase, and 300 service and maintenance jobs.
This project is the result of cooperation between institutions including Ciemat, the IDEA, and the University of Seville.
11MW Solar power plant
The 11MW PS10 solar power plant will generates 24.3GW/hr per year of clean energy. It will have 624 heliostats that track the sun, each with a 120m² surface area parabolic mirror. The mirrors are focused on a 115m tower, heating water pipes that provide 200m² of water-cooled energy exchange surface area. The thermal energy produces steam which drives a turbine to generate electricity. During the day, the power drives the air conditioners that cool buildings in the city of Seville.
Heat is also stored as steam to allow generation at half load for an hour or longer after dark. This is a relatively short storage time, partially because the tower uses water rather than molten salt for heat storage. The water is held in thermally clad tanks and reaches temperatures of 250°C – 255°C (instead of around 600°C for systems using salt). Solucar has opted for water to reduce fatigue on the system components and to ensure simplicity and robustness for the project.
Second generation PS20
PS20 will have twice the PS10 output, with more than 1,000 two-axis sun tracking heliostats driving 120m² mirrors. These mirrors will concentrate solar radiation onto the receiver on top of a 165m tower. PS20 represents a second generation technology with important improvements to receiver and other critical elements.
"It will produce around 300MW – energy for around 180,000 homes."
The 1.2MW Sevilla PV plant will comprise 154 silicon plate heliostats that produce electricity from solar radiation. The remaining power plants will be built over the next few years. It will then include low- and high-concentration photovoltaic, tower thermoelectric, parabolic-trough collector and Stirling dish plants.
Although power from the plant will be more expensive than from conventional sources, prices will fall as the technologies develop. System costs are also more attractive if compared with the cost of generating power from coal or gas only at times of peak demand.
Solucar
Solucar is the parent company of Abengoa SA's solar business unit. Abengoa is a Spanish-based diversified energy company. Since having been founded in 1941, it has expanded its operations to include solar energy and bioenergy. The company has opened a new US subsidiary focused on generating electricity using CSP (Concentrating Solar Power).
Abengoa has five business units: Solar, bioenergy, environmental services, information technologies, and industrial engineering and construction.