EERE's New Projects

Scattering Solar Thermal Concentrators

Program Area 

Awardee Details

Pennsylvania State University


DOE Amount 

Pennsylvania State University is designing and testing a novel solar collector system that relies on stationary optics, avoiding the need for mirror movement. The system is capable of achieving optical performance equal to state-of-the-art parabolic trough systems, but at a lower cost.

The research team is working to demonstrate a scattering solar concentrator with optical performance equal to existing designs of state-of-the-art parabolic troughs, but with the added benefits of immunity to wind-load tracking error, more-efficient land use, and elimination of movable heat-transfer elements.

The Penn State scattering concentrator represents an entirely new way of concentrating sunlight. It incorporates fixed-focus collection optics and scattering into the waveguide modes of a guide sheet. This innovative design represents a hybrid between the high efficiency of conventional geometric optical concentration and the stationary simplicity of luminescent light-trapping. The design’s success constitutes a leap forward in performance and reliability for the collector field—thanks to immunity from wind loading and eliminating the need for movable heat-transfer elements and spectrally selective coatings.


  • Demonstrate a small-scale, fully functioning prototype and test its performance outdoors
  • Attain break-even optical performance compared against existing parabolic troughs
  • Improve the overall performance and reliability of the collector field