Secondary and compound concentrators for parabolic-dish solar-thermal power systems

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Description

A secondary optical element may be added to a parabolic dish solar concentrator to increase the geometric concentration ratio attainable at a given intercept factor. This secondary may be a Fresnel lens or a mirror, such as a compound elliptic concentrator or a hyperbolic trumpet. At a fixed intercept factor, higher overall geometric concentration may be obtainable with a long focal length primary and a suitable secondary matched to it. Use of a secondary to increase the geometric concentration ratio is more likely to be worthwhile if the receiver temperature is high and if errors in the primary are large. ... continued below

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Pages: 47

Creation Information

Jaffe, L.D. & Poon, P.T. April 15, 1981.

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Description

A secondary optical element may be added to a parabolic dish solar concentrator to increase the geometric concentration ratio attainable at a given intercept factor. This secondary may be a Fresnel lens or a mirror, such as a compound elliptic concentrator or a hyperbolic trumpet. At a fixed intercept factor, higher overall geometric concentration may be obtainable with a long focal length primary and a suitable secondary matched to it. Use of a secondary to increase the geometric concentration ratio is more likely to be worthwhile if the receiver temperature is high and if errors in the primary are large. Folding the optical path with a secondary may reduce cost by locating the receiver and power conversion equipment closer to the ground and by eliminating the heavy structure needed to support this equipment at the primary focus. Promising folded-path configurations include the Ritchey-Chretien and perhaps some three-element geometries. Folding the optical path may be most useful in systems that provide process heat.

Physical Description

Pages: 47

Notes

NTIS, PC A03/MF A01.

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Identifier

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  • Other: DE82002273
  • Report No.: DOE/JPL-1060-43
  • Report No.: JPL-PUBL-81-27
  • Grant Number: AC02-77CH00178
  • DOI: 10.2172/5984715 | External Link
  • Office of Scientific & Technical Information Report Number: 5984715
  • Archival Resource Key: ark:/67531/metadc1103169

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • April 15, 1981

Added to The UNT Digital Library

  • Feb. 18, 2018, 3:59 p.m.

Description Last Updated

  • March 30, 2018, 12:24 p.m.

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Jaffe, L.D. & Poon, P.T. Secondary and compound concentrators for parabolic-dish solar-thermal power systems, report, April 15, 1981; United States. (digital.library.unt.edu/ark:/67531/metadc1103169/: accessed April 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.