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Proceedings Paper

Optical performance effects of the misalignment of nonimaging optics solar collectors
Author(s): Jonathan Ferry; Melissa Ricketts; Roland Winston
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Paper Abstract

The use of non-imaging optics in the application of high temperature solar thermal collectors can be extremely advantageous in eliminating the need to track the sun. The stationary nature of non-imaging optics collectors, commonly called compound parabolic concentrators (CPC’s), present a unique design challenge when orienting them to collect sunlight. Many facilities throughout the world that adopt CPCs are not situated to orient the collectors in the ideal angle facing the sun. This East-West misalignment can adversely affect the optical and power performance of the CPC collector. To characterize how this misalignment effects CPCs, reverse raytracing simulations are conducted for varying offset angles of the collectors from solar South. Optical performance is analyzed for an ideal East-West oriented CPC with a 40-degree acceptance angle. Direction cosine plots are used to develop a ratio of annual solar collection by the CPC over the total annual solar input. From these simulations, average annual collector performance is given for offset angles ranging from 0 to 90 degrees for different Earth Latitudes in 10 degree increments.

Paper Details

Date Published: 7 September 2017
PDF: 8 pages
Proc. SPIE 10379, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XIV, 1037907 (7 September 2017); doi: 10.1117/12.2276712
Show Author Affiliations
Jonathan Ferry, Univ. of California, Merced (United States)
Melissa Ricketts, Univ. of California, Merced (United States)
Roland Winston, Univ. of California, Merced (United States)

Published in SPIE Proceedings Vol. 10379:
Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XIV
Roland Winston; Sarah R. Kurtz, Editor(s)

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