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01/02/2011
Solar thermodynamic power plant using molten salts in Portugal
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Siemens to build molten salt solar thermal test facility in Portugal, using ASE's receiver tubes.
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An extract from SIEMENS press release:

As part of the High-Performance Solar Thermal Power research project sponsored by the German Federal Ministry for the Environment, Nature Conservation and Nuclear Safety, Siemens Energy together with German partner companies is to build a power plant test facility operating with molten salt as heat transfer medium. The partner companies include the German Aerospace Center (DLR), K+S AG, Senior Berghöfer GmbH and Steinmüller Engineering GmbH. The technology is to be tested and optimized over a period of three years on the premises of the University of Evora, which is located approximately 130 kilometers southeast of Lisbon, Portugal. The site and the plant infrastructure will be made available through an agreement with the Portuguese utility Energias de Portugal’s (EdP) innovation unit, EDP Inovação.

The 300-meter-long test loop is to be operated using molten salt at temperatures above 500°C. The steam at a higher temperature thus produced will enable more efficient operation of the steam turbine for power generation.

The potential offered by different types of salt is to be investigated at the test facility equipped with receiver tubes made by Archimede Solar Energy (ASE), a company in which Siemens holds a 45 percent stake.

One of the challenges involved in the development of new salts is to find media with a low melting point. The potential risk of freezing in the systems carrying the salt and heat losses can thus be significantly reduced. The aim of the test facility is therefore to achieve enhanced salt melts, an adapted plant design and suitable operating strategies.

Today, molten salt is already being used as the heat transfer medium at the Priolo Gargallo demonstration power plant in Sicily, a plant equipped also with receiver tubes manufactured by ASE.

 

 
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