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Journal ArticleDOI

Coatings for enhanced photothermal energy collection. II - Non-selective and energy control films

01 Sep 1979-Solar Energy Materials (North-Holland)-Vol. 2, Iss: 1, pp 1-17
TL;DR: Several types of surface preparations, other than selective absorbers, can be utilized for economical collection and control of solar energy as mentioned in this paper, which can be used for both solar thermal collectors and for window systems in buildings.
About: This article is published in Solar Energy Materials.The article was published on 1979-09-01 and is currently open access. It has received 48 citations till now. The article focuses on the topics: Solar energy & Anti-reflective coating.
Citations
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Journal ArticleDOI
TL;DR: In this article, a detailed physical model of a hybrid photovoltaic/thermal system is proposed, and algorithms for making quantitative predictions regarding the performance of the system are presented.

338 citations

Journal ArticleDOI
TL;DR: In this paper, the optical properties of (Oxy)nitride materials, including refractive index, reflectance, absorbance, band gap, photoluminescence, and transmittance, are discussed.
Abstract: (Oxy)nitride materials, consisting mainly of transition metal and ionic-covalent (oxy)nitrides, show a vast number of interesting physical and chemical properties due to their substantial structural diversity. The optical properties of these (oxy)nitrides, in combination with their excellent mechanical strength, thermal properties, and chemical stability, enable (oxy)nitrides to be used in a variety of industrial fields, such as photovoltaic, photothermal, photocatalytic, pigment, lighting and display, optoelectronic, and defense industries. The optical properties are extremely related to the electronic band structure of (oxy)nitrides, and can be varied significantly by changing the chemical composition (e.g., the oxygen to nitrogen ratio) and preparation/processing conditions. This article overviews the optical properties (including refractive index, reflectance, absorbance, band gap, photoluminescence, and transmittance) of (oxy)nitride materials that are in the form of thin films, powders, or bulk ceramics, and highlights their applications as antireflection coatings, solar spectral selectivity coatings, visible-light-driven photocatalysts, ecological pigments, phosphors for light-emitting diodes, and transparent window materials.

292 citations

Journal ArticleDOI
TL;DR: In this article, the authors present a review of heat-mirror deposition technology including chemical vapor deposition using hydrolysis and pyrolysis reactions, dc and rf sputtering using reactive, biased and nonreactive techniques, vapor deposition and ion plating.

291 citations

Journal ArticleDOI
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.
Abstract: Commencally or potentially available selective and non-selective absorber surfaces for solar heat collectors are reviewed and the state-of-the-art of solar collector corrosion processes is outlined. The review of available published literature has indicated that a lack of quantitative information exists, relative to corrosion of collector surfaces. Available information (mostly qualitative) on durability aspects and corrosion of solar receiver surfaces is described to indicate potential corrosion problem areas and corrosion prevention possibilities. An outline of appropriate durability tests is presented.

187 citations

Journal ArticleDOI
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.

163 citations

References
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Journal ArticleDOI
TL;DR: To characterize the properties of heat-mirror films for solar-energy collection, the parameters alpha(eff), the effective solar absorptivity, and epsilon(eff, the effective ir emissivity are defined and comparable to the values of alpha/epsilon reported for the leading selective absorbers.
Abstract: Transparent heat-mirror films, which transmit solar radiation but reflect ir thermal radiation, have potentially important applications in solar/thermal/electric conversion, solar heating, solar photovoltaic conversion, and window insulation. We have used rf sputtering to prepare two types of films: TiO2/Ag/TiO2 and Sn-doped In2O3. To characterize the properties of heat-mirror films for solar-energy collection, we define the parameters αeff, the effective solar absorptivity, and ∊eff, the effective ir emissivity. For our Sn-doped In2O3 films, αeff/∊eff is comparable to the values of α/∊ reported for the leading selective absorbers. Even higher values of αeff/∊eff are obtained for the TiO2/Ag/TiO2 films.

233 citations

Journal ArticleDOI
TL;DR: In this paper, an introduction to the theory that must be mastered in order to engineer and evaluate the performance of solar energy systems is presented, and the authors build the necessary background and information in successive chapters, culminating in a section on representative applications.
Abstract: This book is an introduction into the theory that must be mastered in order to engineer and evaluate the performance of solar energy systems. An important goal in solar energy applications is the ability to calculate output from a proposed design application and thereby establish the value of the energy delivered and a fair price for the system. To this end the authors build the necessary background and information in successive chapters, culminating in a section on representative applications. (WDM)

229 citations

Journal ArticleDOI
TL;DR: In this paper, a new type of transparent heat mirror for solar energy applications has been fabricated by chemically etching a Sn-doped In2O3 film to form a transparent conducting microgrid.
Abstract: A new type of transparent heat mirror for solar‐energy applications has been fabricated by chemically etching a Sn‐doped In2O3 film to form a transparent conducting microgrid. For square openings 2.5 μm on a side, separated by lines 0.6 μm wide, the solar transmission increases from 0.8 for the original continuous film to 0.9 for the microgrid. Although 65% of the area of the film is removed by etching, the infrared reflectivity decreases by only 9%, from 0.91 to 0.83. A smaller decrease in the infrared reflectivity may be possible if materials with higher optical conductivity are used.

63 citations

Journal ArticleDOI
TL;DR: Several ways that selective coatings can be used to enhance the performance of solar energy collection systems are reviewed in this paper, including vacuum-deposited, electroplated, and paint-type selective solar absorber coatings.
Abstract: Several ways that selective coatings can be used to enhance the performance of solar energy collection systems are reviewed. Coatings discussed include vacuum‐deposited, electroplated, and paint‐type selective solar absorber coatings and vacuum‐deposited and chemically etched antireflection and infrared reflecting coatings for glass. The optical and physical requirements for the coatings, as well as their effectiveness at increasing solar collector performance, are discussed.

49 citations

Journal ArticleDOI
TL;DR: Optical transmission and reflection data are reported for Cd2SnO4 films coated onto transparent substrates or silicon in this article, where it is shown that these coatings are candidates for transparent heat reflectors and selective absorber components in solar heat collectors
Abstract: Optical transmission and reflection data are reported for Cd2SnO4 films coated onto transparent substrates or silicon It is shown that these coatings are candidates for transparent heat reflectors and selective absorber components in solar heat collectors

45 citations