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Dunhuang Concentrated Solar Power Station敦煌光热电站

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Concentrated solar power (also called concentrating solar power, concentrated solar thermal, and CSP) systems generate solar power by using mirrors or lenses to concentrate a large area of sunlight, or solar thermal energy, onto a small area. Electricity is generated when the concentrated light is converted to heat, which drives a heat engine (usually a steam turbine) connected to an electrical power generator or powers a thermochemical reaction (experimental as of 2013).Heat storage in molten salts allows some solar thermal plants to continue to generate after sunset and adds value to such systems when compared to photovoltaic panels. Becouse these advantages,Concentrated solar power is the most possible future energy which can replace fossile energy. Now China become concentrated solar power research center in the world,this power station located in Dunhuang city,Gansu province.

光热电站是利用反射镜将太阳光能转换为热能,再用热能推动常规蒸汽轮机发电的电站。和光伏电站相比,光热发展有三个无可比拟的优势:
1,由于先把光转换成热,热量可以用廉价低熔点熔盐储存,光热电站可以一年365天不分白天黑夜连续稳定发电,光伏电站只能在有光照的时间发电。
2,光热转化效率可轻易达到90%,热电转化效率也能达到40%左右,光热电站效率能达到36%,光伏电站对光能转化效率目前最高不超过20%
3,光热电站使用常规蒸汽轮机,发电之余可以和火电站、核电站一样提供高温蒸气供工业使用,进一步提高效率。热电联供的光热电站整体效率能达到60%以上,而光伏电站无法提供热蒸汽。

因为以上优势,光热电站普遍被认为是最有前途的未来科技,唯一可能完全取代现有化石能源的新能源(风能、光伏等都有发电不稳定难以储存的致命伤)。光热发电兴起时间很短,原先以西班牙、美国为发展中心,在政府大力推动下,光能丰富的中国西北已成为世界光热电站的最大聚集地。国际普遍看好中国最有可能首先取得突破,价格降低到无需补贴的水平。国内已选定青海德令哈、甘肃敦煌两个光热电站示范区,这个光热电站位于甘肃省河西走廊西端名城敦煌市郊外的戈壁滩上。
http://www.nea.gov.cn/2016-09/07/c_135668622.htm
https://en.wikipedia.org/wiki/Concentrated_solar_power

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