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A new concept for solar energy thermal conversion
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In this article, a new approach to the conversion of solar energy to heat is proposed, which consists of a dense array of metal whiskers grown with spacings of a few wavelengths of visible light, and achieves significant optical absorption by trapping the light by a geometric maze effect.Abstract:
A material has been developed which allows a new approach to be made to the conversion of solar energy to heat. It consists of a dense array of metal whiskers grown with spacings of a few wavelengths of visible light. The material selected has low emissivity, and achieves significant optical absorption by trapping the light by a geometric maze effect. We have deomonstrated that absorption of normal incidence light is greater than 98% from 0.5 to 40‐μm wavelengths, and hemispherical emissivity at 550 °C can be made less than 0.26. Since surfaces can be made of a single refractory element, such as W, high‐temperature solar conversion (550 °C) should be maintained with good surface stability.read more
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Review of Mid- to High-Temperature Solar Selective Absorber Materials
TL;DR: In this article, the authors describe the concentrating solar power (CSP) systems using solar absorbers to convert concentrated sunlight to thermal electric power, and achieve solar absorber surfaces for efficient photothermal conversion having high solar absorptance (a) for solar radiation and low thermal emittance (e) at the operational temperature.
Journal ArticleDOI
Radiative heating and cooling with spectrally selective surfaces.
TL;DR: The ideal spectral properties are treated, an illustrative experimental example of how well this goal can be realized is given, and a corresponding theoretical curve is shown indicating to what extent the measured results can be theoretically understood.
Journal ArticleDOI
Materials for photothermal solar energy conversion
Walter Bogaerts,Carl M. Lampert +1 more
TL;DR: In this article, a review of available published literature has indicated that a lack of quantitative information exists, relative to corrosion of collector surfaces, and available information (mostly qualitative) on durability aspects and corrosion of solar receiver surfaces is described.
Journal ArticleDOI
The fundamentals of chemical vapour deposition
TL;DR: The most important aspects of the chemical vapour deposition process are reviewed; these include deposit structure (with its relation to process parameters), process control through application of the principles of thermodynamics and reaction kinetics, with emphasis on deposit thickness uniformity, deposit composition control and deposit-substrate adherence as mentioned in this paper.
Journal ArticleDOI
Coatings for enhanced photothermal energy collection I. Selective absorbers
TL;DR: For economical and efficient utilization of solar energy various types of absorber coatings and preparations can be used for solar collectors as discussed by the authors, and several varieties of commercial and research selective absorbers are reviewed and tabulated for application.
References
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Journal ArticleDOI
Physics looks at solar energy
TL;DR: The idea of using the sun as a source of energy has had a long history, but so far it has been a history of bright hope and dismal failure as discussed by the authors, but the early 1950's newspaper headlines were full of glowing predictions of what solar energy could do for mankind; the first International Conference on Applied Solar Energy had been held, and solar energy seemed ready to take its place, along with peaceful uses of atomic energy and with interplanetary exploration, on Vannevar Bush's "endless frontier of science".