by National Aeronautics and Space Administration, for sale by the National Technical Information Service in Washington, Springfield, Va .
Written in English
|Statement||Ronald M. Cosby.|
|Series||NASA contractor report ; NASA CR-2890, NASA contractor report -- NASA CR-2890.|
|Contributions||United States. National Aeronautics and Space Administration.|
|The Physical Object|
|Pagination||viii, 59 p. :|
|Number of Pages||59|
Solid concentration by curved-based fresnel lenses. Washington: National Aeronautics and Space Administration ; Springfield, Va.: For sale by the National Technical Information Service, (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors. Nonimaging Fresnel Lenses: Design and Performance of Solar Concentmtors; what are we talking about? It is easy to forget that you, dear reader, may not be one of those who work inexactly the same field as we do: nonimaging optics for the concentration of sunlight. You may be a researcher in some optical science interested in the core subject of this book: the world's first practical design of 5/5(1). Fresnel Lens Optics. Fresnel (pronounced) lenses have been widely used in solar collectors that concentrate light by refraction. Since it is a flat approximation of a curved lens, a Fresnel lens has less material and weighs less than a corresponding curved lens. This results in lower cost and less optical transmission loss through the lens. nonimaging Fresnel lens for use in a solar ther mal collector with low concentration ratio. When the lens is used on CPV system, a secondary concentrator is needed (Leutz et al., ).
2-Pack Round Fresnel Lens Diameter mm(") Focal Length mm(") Acrylic Fresnel Lenses for Solar Heating, Visual Education or Cooking Outside, DIY Solar Concentrator out of 5 stars 1 $ $ The new structure of the curved Fresnel lens can improve significantly the uniformity of sunlight distribution over the solar cell while the concentration ratio can reach a high value of times. The good uniform distribution can be obtained by using the novel idea. The plastic Fresnel lens has brought the advantages of Fresnel lenses to a higher level. In , Mill OE designed and fabricated the world’s first plastic Fresnel lens by injection molding . Nevertheless the Fresnel lens was not applied in solar concentration widely until . The operating temperature of the system is in the range of –K and the geometric concentration ratio of the parabolic-trough system is in the range of 30– (Table ) .Parabolic-trough collector is a viable technology for harnessing solar energy for industrial process heat in Cyprus .Parabolic-trough solar concentrating systems are an advanced and matured technology.
1. Introduction. Refractive concentrator photovoltaic (CPV) systems typically utilise Fresnel Lenses to collimate and focus solar illuminations onto a smaller solar cell which is economically advantageous by minimising the required photovoltaic (PV) cell Fresnel lens is commonly exploited as a primary optical interface in focal point CPV systems due to its high optical efficiency and. This book offers a detailed and comprehensive account of the engineering of the world's first nonimaging Fresnel lens solar concentrator. The book closes a gap in solar concentrator design, and describes nonimaging refractive optics and its numerical s: 1. © by D.S. Halacy, Jr., and originally published by the Macmillan Company as a chapter of the book, Fun With The Sun. Reprinted by permission of the author in Most of us learned at an. This system was composed of a m 2 solar air heater field, a 12 m 2 solar water collector. the results showed that water production of the system could reach L/day ( L/day/m 2 solar collector), when the average intensity of solar radiation got to W/m 2. While all of these prior investigations have made significant contributions.