Light Management

Effect of reflection losses on stationary dielectric-filled nonimaging concentrators

[+] Author Affiliations
Srikanth Madala, Robert F. Boehm

University of Nevada Las Vegas, Center for Energy Research, Department of Mechanical Engineering, 4505 South Maryland Parkway, Las Vegas, Nevada 89154-4027, United States

J. Photon. Energy. 6(4), 047002 (Nov 14, 2016). doi:10.1117/1.JPE.6.047002
History: Received June 17, 2016; Accepted October 20, 2016
Text Size: A A A

Abstract.  The effect of Fresnel reflection and total internal reflection (TIR) losses on the performance parameters in refractive solar concentrators has often been downplayed because most refractive solar concentrators are traditionally the imaging type, yielding a line or point image on the absorber surface when solely interacted with paraxial etendue ensured by solar tracking. Whereas, with refractive-type nonimaging solar concentrators that achieve two-dimensional (rectangular strip) focus or three-dimensional (circular or elliptical) focus through interaction with both paraxial and nonparaxial etendue within the acceptance angle, the Fresnel reflection and TIR losses are significant as they will affect the performance parameters and, thereby, energy collection. A raytracing analysis has been carried out to illustrate the effects of Fresnel reflection and TIR losses on four different types of stationary dielectric-filled nonimaging concentrators, namely V-trough, compound parabolic concentrator, compound elliptical concentrator, and compound hyperbolic concentrator. The refractive index (RI) of a dielectric fill material determines the acceptance angle of a solid nonimaging collector. Larger refractive indices yield larger acceptance angles and, thereby, larger energy collection. However, they also increase the Fresnel reflection losses. This paper also assesses the relative benefit of increasing RI from an energy collection standpoint.

Figures in this Article
© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Srikanth Madala and Robert F. Boehm
"Effect of reflection losses on stationary dielectric-filled nonimaging concentrators", J. Photon. Energy. 6(4), 047002 (Nov 14, 2016). ; http://dx.doi.org/10.1117/1.JPE.6.047002


Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement


 

  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.