Solar energy concentration. Progress report, July 1, 1975--March 31, 1976
The optical and thermal properties of ideal concentrators which concentrate radiation by the maximum amount possible for a given range of angular acceptance have been under investigation. This has been done experimentally, analytically and numerically (with the University of Chicago computer). The following reflector-absorber combinations have been studied: (a) flat receiver, parabolic reflector (compound parabolic concentrator, or CPC); (b) vertical fin receiver inside half-aluminized evacuated glass tube coupled to CPC; (c) vertical fin receiver, circular-parabolic reflector; (d) circular cylindrical receiver, extended involute reflector; (e) convex receiver, lens at entrance aperture, hyperbolic reflectors; (f) arbitrary receiver shape, CPC modified to limit angle of incidence onto receiver; (g) concentrators with a gap between the receiver and the reflector for thermal isolation; (h) concentrators used as a second stage concentrator; and (i) concentrators formed from a solid dielectric material. In addition to laboratory and theoretical studies of solar energy concentrators, a collector is being manufactured to provide heat for a schoolhouse near Gallup, New Mexico. The design is of type (c) with a gap between the receiver and the reflector. Fluid flows through a tube mounted in the fin. It is anticipated that the system will be in operation for the coming heating season.
- Research Organization:
- Chicago Univ., Ill. (USA). Enrico Fermi Inst.
- DOE Contract Number:
- E(11-1)-2446
- OSTI ID:
- 7361957
- Report Number(s):
- COO-2446-7
- Country of Publication:
- United States
- Language:
- English
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