Variable aperture, variable flux density, aerospace solar collec

Details Variable aperture, variable flux density, aerospace solar collec Variable aperture, variable flux density, aerospace solar collec

1988-01-05

1989-12-19

Weisstuch, Aaron

Batteries: thermoelectric and photoelectric

Photoelectric

Cells

136246, 136290, 136292, 437 2, 437174, 437247, H02N 600, H01L 3118

Patent

active

048880639

ABSTRACT:
A trough-type reflecting solar concentrator and receiver system for aerospace use is disclosed. The reflecting surface is a thin flexible sheet attached to and disposed between curved ribs. The amount of the sheet reflecting sunlight can be changed by winding the unnecessary quantity of sheet onto a roll. The focal length of the curved ribs and therefore the sheet can be changed by flexurally deforming the curved ribs by applying end loads, causing a change in the flux density at the receiver. A similar result is achieved by changing the distance between the reflecting surface and the receiver. The receiver is a photovoltaic array, thermal absorber, or a combination of both. Means for proportioning the amount of energy incident on each type of receiver is disclosed. A spectral splitting thermal absorber with scattering capability is disclosed as a pre-filter for the photovoltaic array.

REFERENCES:
patent: 3597281 (1971-08-01), Webb
patent: 4494302 (1985-01-01), Knechtli et al.

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