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Author Topic: Gemasolar solar plant in Seville, Spain  (Read 1110 times)

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Offline khurram

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Gemasolar solar plant in Seville, Spain
« on: June 12, 2011, 06:03:57 PM »
 

 
 At the new Gemasolar solar plant in Seville, Spain, 2,650 large mirrors concentrate sunlight to generate 19.9 megawatts of electricity. It was completed and started up in May.

source: imgur.com
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Offline khurram

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Re: Gemasolar solar plant in Seville, Spain
« Reply #1 on: June 12, 2011, 06:04:04 PM »
 

 
 Mirrors focus sunlight on a central tower, heating it up to as much as 900 °C. Molten salts within the tower reach 500 °C. They carry heat to electricity generation buildings at the base of the tower.
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Offline khurram

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Re: Gemasolar solar plant in Seville, Spain
« Reply #2 on: June 12, 2011, 06:04:10 PM »
 

 
 Inside these structures (shown here under construction last year), molten salt heats up water to produce steam, the steam drives a turbine, and the turbine spins a generator to produce electricity. Molten salt is stored in two large storage tanks (at the right) and retains enough heat for generating electricity for 15 hours. This allows plant operators to generate electricity when it is most needed, even at night. The system also smooths out fluctuations in power output due to weather.
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Offline khurram

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Re: Gemasolar solar plant in Seville, Spain
« Reply #3 on: June 12, 2011, 06:04:17 PM »
 

 
 The tracking system on the back of each of the large mirrors is used to keep sunlight focused on the tower throughout the day. It can pivot on two axes.
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Offline khurram

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Re: Gemasolar solar plant in Seville, Spain
« Reply #4 on: June 12, 2011, 06:04:22 PM »
 

 
  Also in May, two large solar photovoltaics projects were completed in southern France. Together they cover 89 acres and generate up to 18.2 megawatts of electricity using 79,000 solar panels.
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Offline khurram

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Re: Gemasolar solar plant in Seville, Spain
« Reply #5 on: June 12, 2011, 06:04:27 PM »
 

 
  The area where the plant is located is very sunny, making it an attractive location for solar. But to appease local residents, it had to be integrated with the landscape to make it less of an eyesore. As a result, not every panel is oriented at the precise optimum angle for absorbing sunlight, but it looks good.
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Offline Flavio

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Re: Gemasolar solar plant in Seville, Spain
« Reply #6 on: June 18, 2011, 09:15:44 PM »
Very intersting. Thanks for sharing this info.

I found something more about solar termal plants; Gemasolar fills 185 hectares, so its density is:

power density = 19.9 MW / 185 hectars = 0,11 MW/hectar


Instead for the other photovoltaic in France:

89 acres = 89*0.40 hectars = 35.6 hectares
power density = 18.2 MW / 35.6 hectares = 0.51 MW/hectar


MMhhh... quite strange, I thought that concentrated thermal solar was more efficient than photovoltaic....
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Offline Flavio

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Re: Gemasolar solar plant in Seville, Spain
« Reply #7 on: June 18, 2011, 10:11:39 PM »
With the energy density the two plants are more comparable.
 
 Gemasolar is expected to produce 110 GWh/year; so its energy density will be around:
 
 110 GWh/year / 185 hectares = 0.59 GWh/year / hectare
 
 Instead the photovoltaic should produce an energy around 20 GWh/year; so its energy density should be:
 
 20 GWh/year / 35.6 hectares = 0.78 GWh/year / hectare
 
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Offline adie2356

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Re: Gemasolar solar plant in Seville, Spain
« Reply #8 on: June 23, 2011, 08:09:06 PM »
I am pretty sure that in the future not only in Spain there will be created such a solar energy parks. Despite that the European Union programs which are stimulating alternative energy projects I hope that a lot of private investor will start reviewing this as a great opportunity.
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