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Amongst CSP technologies, trough systems are the most mature and have a long track record that demonstrates their reliability in large scale applications. Trough systems have been running since the 1980s and in that time have seen dramatic improvements in performance and cost. Currently there are more than 300 MW of trough systems in operation with 400 MW under construction and approximately 6 GW in development.
Abengoa Solar is involved with every stage of CSP technology.
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Abengoa Solar has extensive experience with solar trough technology. We are leaders of the Eurotrough and DISS projects. Currently, Abengoa Solar is constructing two 50 MWe plants (Solnova I and III) with hundreds of MWe of CSP in development.
Much of Abengoa Solar designs much of its own proprietary technology. The structure used for CSP troughs, Solúcar TR, was designed by Abengoa Solar NT, and the mirrors are manufactured at Abengoa Solar's Rioglass Solar factory.

Parabolic troughs that track the sun on 1-axles are used to concentrate solar radiation onto receiver tubes located at the parabola's focal point. A working fluid, currently a synthetic oil, flows through the receiver tube and absorbs the radiation as heat. The heat absorbed by the oil is used to produce steam and drive a conventional power cycle.
Abengoa Solar invests a lot of time and effort toward R&D to improve CSP plant costs and performance. Research is currently being done at a demonstration facility to improve working fluids (i.e. synthetic oils), develop high efficiency receiver tubes, and improve the Solucar TR structure.