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Linear Fresnel lens with polar tracking.

|March 24, 2010

Summary

Linear Fresnel lenses, corrected for coma and color aberrations, achieved effective solar concentrations of up to 90x with 75% efficiency in polar tracking systems.

Area of Science:

Optical engineering
Renewable energy systems

Background:

Linear Fresnel lenses offer a cost-effective approach to solar concentration.
Aberrations like coma and chromatic distortion can limit the performance of Fresnel lenses.
Accurate solar tracking is crucial for maximizing energy capture.

Purpose of the Study:

To evaluate the performance of coma and color-corrected linear Fresnel lenses.
To assess their suitability for polar tracking solar concentrator systems.

Main Methods:

Optical design and simulation of corrected linear Fresnel lenses.
Experimental setup for solar concentration testing.
Performance evaluation under simulated solar conditions with polar tracking.

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Main Results:

Effective solar concentration ratios of up to 90 were achieved.
The lenses demonstrated a consistent efficiency of 75% under tested conditions.
Correction for coma and color significantly improved optical quality and concentration.

Conclusions:

Coma and color-corrected linear Fresnel lenses are effective for solar concentration.
These lenses show significant potential for use in polar tracking systems.
High concentration ratios and efficiencies are achievable with optimized lens designs.