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Asymmetric second-stage concentrators.

E M Kritchman¹

¹University of Chicago, Enrico Fermi Institute, Chicago, Illinois 60637, USA.

|April 8, 2010

Summary

Researchers designed an ideal second-stage reflective element for linear optical concentrators. This design is useful for asymmetric two-stage solar energy concentrators, preventing secondary shading of the primary concentrator.

Area of Science:

Optical Engineering
Renewable Energy Systems

Background:

Linear optical concentrators are crucial for solar energy applications.
Designing efficient secondary concentrators is challenging, especially for asymmetric systems.

Purpose of the Study:

To design an ideal second-stage reflective element for a linear primary optical concentrator.
To enable efficient redirection of concentrated radiation onto a defined surface.

Main Methods:

Utilizing a linear (2-D) primary optical concentrator.
Designing a convex second-stage reflective element of arbitrary shape and location.
Ensuring the secondary element redirects radiation onto a specific section of a convex surface.

Main Results:

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An ideal design for a second-stage reflective element was achieved.

The design facilitates the redirection of primary radiation onto a designated surface section.

The design is applicable to asymmetric two-stage solar concentrators.

Conclusions:

The developed reflective element design is effective for two-stage optical concentration.
This design offers a solution for asymmetric solar concentrators, avoiding secondary shading issues.