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Processing metal with solar energy

03.11.2011
Solar-generated saturated steam fed into steam network at 140 °C

In Germany, industrial process heat comprises around 10% of the energy requirements. Part of it can be generated with solar thermal systems. Using twelve collectors that track the sun’s position, a metal processing company in Ennepetal, Germany, has for the first time generated saturated steam and integrated it into an existing steam network.

The pilot system is presented in the new BINE-Projektinfo brochure “The sunny side of saturated steam” (11/2011). In this research project, the process’s operational basis for utilising solar process heat was tested and optimised, whereby a particular focus was on the future use of such systems in more southern parts of the globe.

Saturated steam is steam produced at the saturation temperature and is used in many industrial production processes up to 200 °C. In the pilot system, steam is generated directly in the absorbers within the parabolic trough collectors, thus eliminating the need for a special heat exchanger. This improves the efficiency. A company in the aluminium-finishing sector has integrated the solar steam generator into its existing steam network. Here, the steam is used to quickly heat various chemical baths to temperatures between 60 and 110 °C. As expected, the solar yields from this pilot system were relatively low, which is partly due to the limited collector surface area. The project itself, however, was deemed to be successful because it enabled a highly promising process for generating and directly feeding solar steam to be realised and tested in long-term operation. The process could also be used in other sectors for drying and heating processes and for solar refrigeration.

In order to achieve temperatures above 100 °C with solar heat, concentrating collectors are deployed. The pilot system uses parabolic trough collectors – a technology in which German companies are among the best in the world. The BINE Projektinfo brochure “The sunny side of saturated steam” (11/2011), which can be obtained free of charge from the BINE Information Service at FIZ Karlsruhe, is available online at www.bine.info.

Press contact
Uwe Milles
presse(at)bine.info
About BINE Information Service
Energy research for practical applications
The BINE Information Service reports on energy research topics, such as new materials, systems and components, as well as innovative concepts and methods. The knowledge gained is incorporated into the implementation of new technologies in practice, because first-rate information provides a basis for pioneering decisions, whether in the planning of energy-optimised buildings, increasing the efficiency of industrial processes, or integrating renewable energy sources into existing systems.

About FIZ Karlsruhe

FIZ Karlsruhe – Leibniz Institute for Information Infrastructure is a not-for-profit organization with the public mission to make sci-tech information from all over the world publicly available and to provide related services in order to support the national and international transfer of knowledge and the promotion of innovation.
Our business areas:
• STN International – the world’s leading online service for research and patent information in science and technology
• KnowEsis – innovative eScience solutions to support the process of research in all its stages, and throughout all scientific disciplines
• Databases and Information Services – Databases and science portals in mathematics, computer science, crystallography, chemistry, and energy technology
FIZ Karlsruhe is a member of the Leibniz Association (WGL) which consists of 87 German research and infrastructure institutions.

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Further information:
http://www.bine.info/en

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