Proven technological feasibility for commercial use

Between 2006 and 2008, Solar Power Group and its partner Ferrostaal AG, the German Aerospace Centre (DLR), the Fraunhofer Institute ISE and CIEMAT jointly realized the research and development project Fresdemo on the Spanish Plataforma Solar de Almería.

The aim of the project was to verify the technological feasibility of the SPG Fresnel collector and to determine the optical, thermal and geometric efficiency of individual components and of the whole system throughout a prolonged time of operation.  

Over the course of two years, detailed long-term measurements were made and data collected of:

  • Optical receiver quality
  • Thermal expansion of key components
  • Heat losses in the absorber tube
  • The influence of dirt on the overall efficiency
  • Steam parameters and optimization for a two-phase flow
  • Component reliability
  • Torsion of the steel components
  • Mirror field accuracy
  • Incident Angle Modifier (IAM)

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