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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 19 — Jul. 1, 2011
  • pp: 3303–3310

Evaluation and optimization of the optical performance of low-concentrating dielectric compound parabolic concentrator using ray-tracing methods

Nabin Sarmah, Bryce S. Richards, and Tapas K. Mallick  »View Author Affiliations


Applied Optics, Vol. 50, Issue 19, pp. 3303-3310 (2011)
http://dx.doi.org/10.1364/AO.50.003303


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Abstract

We present a detailed design concept and optical performance evaluation of stationary dielectric asymmetric compound parabolic concentrators (DiACPCs) using ray-tracing methods. Three DiACPC designs, DiACPC-55, DiACPC-66, and DiACPC-77, of acceptance half-angles ( 0 ° and 55 ° ), ( 0 ° and 66 ° ), and ( 0 ° and 77 ° ), respectively, are designed in order to optimize the concentrator for building façade photovoltaic applications in northern latitudes ( > 55 ° N ). The dielectric concentrator profiles have been realized via truncation of the complete compound parabolic concentrator profiles to achieve a geometric concentration ratio of 2.82. Ray-tracing simulation results show that all rays entering the designed concentrators within the acceptance half-angle range can be collected without escaping from the parabolic sides and aperture. The maximum optical efficiency of the designed concentrators is found to be 83%, which tends to decrease with the increase in incidence angle. The intensity is found to be distributed at the receiver (solar cell) area in an inhomogeneous pattern for a wide range of incident angles of direct solar irradiance with high-intensity peaks at certain points of the receiver. However, peaks become more intense for the irradiation incident close to the extreme acceptance angles, shifting the peaks to the edge of the receiver. Energy flux distribution at the receiver for diffuse radiation is found to be homogeneous within ± 12 % with an average intensity of 520 W / m 2 .

© 2011 Optical Society of America

OCIS Codes
(080.0080) Geometric optics : Geometric optics
(350.0350) Other areas of optics : Other areas of optics
(350.6050) Other areas of optics : Solar energy
(080.4295) Geometric optics : Nonimaging optical systems

History
Original Manuscript: March 21, 2011
Manuscript Accepted: May 10, 2011
Published: July 1, 2011

Citation
Nabin Sarmah, Bryce S. Richards, and Tapas K. Mallick, "Evaluation and optimization of the optical performance of low-concentrating dielectric compound parabolic concentrator using ray-tracing methods," Appl. Opt. 50, 3303-3310 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-19-3303

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