Download or read book Solar Selective Surfaces written by O. P. Agnihotri and published by John Wiley & Sons. This book was released on 1981-04-13 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers the design, production, evaluation and application of surfaces having high absorptance in the solar spectrum and low emittance at the operating temperature of the solar collection system. Presents current, significant data on the enhancement of solar collector efficiency by the use of selective surfaces.

Download or read book High Temperature Solar Selective Coatings written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Improved solar collectors (40) comprising glass tubing (42) attached to bellows (44) by airtight seals (56) enclose solar absorber tubes (50) inside an annular evacuated space (54. The exterior surfaces of the solar absorber tubes (50) are coated with improved solar selective coatings {48} which provide higher absorbance, lower emittance and resistance to atmospheric oxidation at elevated temperatures. The coatings are multilayered structures comprising solar absorbent layers (26) applied to the meta surface of the absorber tubes (50), typically stainless steel, topped with antireflective Savers (28) comprising at least two layers 30, 32) of refractory metal or metalloid oxides (such as titania and silica) with substantially differing indices of refraction in adjacent layers. Optionally, at least one layer of a noble metal such as platinum can be included between some of the layers. The absorbent layers cars include cermet materials comprising particles of metal compounds is a matrix, which can contain oxides of refractory metals or metalloids such as silicon. Reflective layers within the coating layers can comprise refractory metal silicides and related compounds characterized by the formulas TiSi. Ti.sub. 3SiC.sub. 2, TiAlSi, TiAN and similar compounds for Zr and Hf. The titania can be characterized by the formulas TiO.sub. 2, Ti.sub. 3O.sub. 5. TiOx or TiO.sub.xN.sub. 1-x with x 0 to 1. The silica can be at least one of SiO.sub. 2, SiO.sub. 2x or SiO.sub. 2xN.sub. 1-x with x=0 to 1.

Download or read book Solar Selective Coatings written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The definition, fabrication, and specification of solar selective absorber surfaces are discussed. Also, the nature of solar radiation and thermal radiation in relation to selective surfaces is considered. (WHK).

Download or read book Solar selective Paint Coating Development written by W. D. McKelvey and published by . This book was released on 1979 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Solar Selective Absorbers written by Belal Usmani and published by CRC Press. This book was released on 2024-11-25 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book covers different harnessing technologies for solar energy, electromagnetic radiation including design principles and different types of spectrally selective coatings. It emphasizes experimental methods for synthesizing these coating structures and characterization techniques to quantify the absorber characteristics.

Download or read book High Temperature Solar Selective Coatings written by and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Improved Solar collectors (40) comprising glass tubing (42) attached to bellows (44) by airtight seals (56) enclose solar absorber tubes (50) inside an annular evacuated space (54). The exterior surfaces of the solar absorber tubes (50) are coated with improved solar selective coatings (48) which provide higher absorbance, lower emittance and resistance to atmospheric oxidation at elevated temperatures. The coatings are multilayered structures comprising Solar absorbent layers (26) applied to the meta surface of the absorber tubes (50), typically stainless steel, topped with antireflective savers (28) comprising at least two layers (30, 32) of refractory metal or metalloid oxides (such as titania and silica) with substantially differing indices of refraction in adjacent layers. Optionally, at least one layer of a noble metal such as platinum can be included between some of the layers. The absorbent layers cars include cermet materials comprising particles of metal compounds is a matrix, which can contain oxides of refractory metals or metalloids such as silicon. Reflective layers within the coating layers can comprise refractory metal silicides and related compounds characterized by the formulas TiSi. TiSiC, TiAlSi, TiAN and similar compounds for Zr and Hf. The titania can be characterized by the formulas TiO, TiOs. TiOx or TiON with X 0 to 1. The silica can be at least one of SiO, SiO, or SiON with X=0 to 1.

Download or read book The Study of Nanostructured Solar Selective Coatings written by and published by . This book was released on 2012 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Deposition and Characterization of Solar Selective Coatings written by Nevin Ozdemir and published by . This book was released on 2006 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Concentrating Solar Power Collectors Mirrors and Solar Selective Coatings written by and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The intention is to explore the feasibility of depositing the coating by lower-cost methods and to perform a rigorous cost analysis after a viable high-temperature solar-selective coating is demonstrated by e-beam.

Download or read book Studies on Selective Coatings for Solar Absorbers written by Sten Löfving and published by . This book was released on 1980 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Solar Selective Coatings written by Donald M. Mattox and published by . This book was released on 1977 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Solar Selective Coatings with Multilayered Structure Based on Thermal Spraying WC Co Solar Absorption Layer written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Temperature Performance of High efficiency Multi layer Solar Selective Coatings for Tower Applications written by and published by . This book was released on 2015 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The roadmap to next-generation concentrating solar power plants anticipates a progression to central towers with operating temperatures in excess of 650°C. These higher temperatures are required to drive higher power-cycle efficiencies, resulting in lower cost energy. However, these conditions also place a greater burden on the materials making up the receiver. Any novel absorber material developed for next-generation receivers must be stable in air, cost effective, and survive thousands of heating and cooling cycles. The collection efficiency of a power tower plant can be increased if the energy absorbed by the receiver is maximized while the heat loss from the receiver to the environment is minimized. Thermal radiation losses can be significant (>7% annual energy loss) with receivers at temperatures above 650°C. We present progress toward highly efficient and durable solar selective absorbers (SSAs) intended for operating temperatures from 650°C to 1000°C. Selective efficiency ([eta]sel) is defined as the energy retained by the absorber, accounting for both absorptance and emittance, relative to the energy incident on the surface. The low emittance layers of multilayer SSAs are binary compounds of refractory metals whose material properties indicate that coatings formed of these materials should be oxidation resistant in air to 800-1200°C. On this basis, we initially developed a solar selective coating for parabolic troughs. This development has been successfully extended to meet the absorptance and emittance objectives for the more demanding, high temperature regime. We show advancement in coating materials, processing and designs resulting in the initial attainment of target efficiencies [eta]sel> 0.91 for proposed tower conditions. Additionally, spectral measurements show that these coatings continue to perform at targeted levels after cycling to temperatures of 1000°C in environments of nitrogen and forming gas.

Download or read book Commercialization of High Temperature Solar Selective Coating written by and published by . This book was released on 2014 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal for Concentrating Solar Power (CSP) technologies is to produce electricity at 15 cents/kilowatt-hour (kWh) with six hours of thermal storage in 2015 (intermediate power) and close to 10 cents/kWh with 12-17 hours of thermal storage in 2020 (baseload power). Cost reductions of up to 50% to the solar concentrator are targeted through technology advances. The overall solar-to-electric efficiency of parabolic-trough solar power plants can be improved and the cost of solar electricity can be reduced by improving the properties of the selective coating on the receiver and increasing the solar-field operating temperature to>450 degrees C. New, more-efficient selective coatings will be needed that have both high solar absorptance and low thermal emittance at elevated temperatures. Conduction and convection losses from the hot absorber surface are usually negligible for parabolic trough receivers. The objective is to develop new, more-efficient selective coatings with both high solar absorptance (.alpha.> 0.95) and low thermal emittance (.epsilon.

Download or read book Solar selective Paint Coating Development Final Report written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Formulations and process conditions for thickness-sensitive paint coatings were defined. New pigments were evaluated, but none were found which can be used as a substitute for Ferro's F-6331. Coating thermal stability, weathering and humidity resistance, and effects of pigment agglomeration size on coating optical performance were studied. Eighteen hundred square feet of aluminum foil were coated in the first large-scale application with optical properties of .cap alpha./sub s/ = 0.90 and epsilon = 0.25. This demonstrated that a high-speed laminator is capable of producing a coating with uniform optical properties by a roll coating technique. Thickness-insensitive paint coatings were developed with urethane, acrylic, and silicone binders. This type of coating combines the selective coatings currently under development and aluminum flake to provide the low emittance substrate. By varying the ratio of paint to flake, selective properties of .cap alpha./sub s/ = 0.90 and epsilon = 0.31 were achieved. The silicone systems showed the best optical performance. Aluminum powder which gave larger surface area was evaluated and found not feasible. Washing and aging techniques of the aluminum flake were studied in an attempt to improve optical performance. (MHR).

Download or read book Sustainable Material Solutions for Solar Energy Technologies written by Mariana Amorim Fraga and published by Elsevier. This book was released on 2021-08-18 with total page 669 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable Material Solutions for Solar Energy Technologies: Processing Techniques and Applications provides an overview of challenges that must be addressed to efficiently utilize solar energy. The book explores novel materials and device architectures that have been developed to optimize energy conversion efficiencies and minimize environmental impacts. Advances in technologies for harnessing solar energy are extensively discussed, with topics including materials processing, device fabrication, sustainability of materials and manufacturing, and current state-of-the-art. Leading international experts discuss the applications, challenges, and future prospects of research in this increasingly vital field, providing a valuable resource for students and researchers working in this field. Explores the fundamentals of sustainable materials for solar energy applications, with in-depth discussions of the most promising material solutions for solar energy technologies: photocatalysis, photovoltaic, hydrogen production, harvesting and storage Discusses the environmental challenges to be overcome and importance of efficient materials utilization for clean energy Looks at design materials processing and optimization of device fabrication via metrics such as power-to-weight ratio, effectiveness at EOL compared to BOL, and life-cycle analysis

Download or read book High Temperature Solar Selective Coatings for Solar Power Central Receivers written by and published by . This book was released on 2013 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: