An analytical and experimental investigation of a 1. 8 by 3. 7 meter Fresnel lens solar concentrator
Line-focusing acrylic Fresnel lenses with application potential in the 200 to 370 C range are being analytically and experimentally evaluated. Investigations previously conducted with a 56 cm wide lens have been extended by the present study to experimentation/analyses with a 1.8 by 3.7 m lens. A measured peak concentration ratio of 64 with 90 percent of the transmitted energy focused into a 5.0 cm width was achieved. A peak concentration of 61 and a 90 percent target width of 4.5 cm were analytically computed. The experimental and analytical lens transmittance was 81 percent and 86 percent, respectively. The lens also was interfaced with a receiver assembly and operated in the collection mode. The collection efficiency ranged from 42 percent at 100 C to 26 percent at 300 C.
- Research Organization:
- National Aeronautics and Space Administration, Huntsville, Ala. (USA). George C. Marshall Space Flight Center
- OSTI ID:
- 5244371
- Report Number(s):
- N-77-30617; NASA-TP-1005; M-224
- Country of Publication:
- United States
- Language:
- English
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