Development and fabrication of a two-axis tracking structure and baseline module improvement
The design improvement objectives of this project were to further enhance the performance and reduce cost of the second-generation low-profile point-focus Fresnel lens concentrator. The primary objective was to redesign a two-axis drive mechanism and structure that overcomes the failure modes of the first-generation design and increases collector aperture area without detriment to performance. A secondary objective was to develop secondary optics and grid obscuration techniques to improve module electrical performance and increase tracking error tolerance. The drive mechanism and structure design resulted in a significant reduction in the number of parts and improved structural integrity. The tracking structure is capable of supporting 70 square meters of flat-plate modules and 41 square meters of second-generation point-focus Fresnel lens modules. A total internal reflector (TIR) with cell grid obscuration grooves was designed. The TIR had superior offtracking performance over secondary reflectors but, without grid obscuration, was unable to achieve operating efficiencies equal to the earlier designs. Grid obscuration designs were evolved and proof of concept established. Further development is necessary to evaluate the actual application of grid obscuration techniques under high concentration.
- Research Organization:
- Intersol Power Corp., Lakewood, CO (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6586384
- Report Number(s):
- SAND-86-7042; ON: DE87007952
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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