翻訳と辞書 Words near each other ・ Optical microscope ・ Optical microsphere ・ Optical mineralogy ・ Optical modulation amplitude ・ Optical modulator ・ Optical modulators using semiconductor nano-structures ・ Optical molasses ・ Optical mount ・ Optical mouse ・ Optical Multi-Tree with Shuffle Exchange ・ Optical Museum Jena ・ Optical Music Series ・ Optical Network on Chip ・ Optical networking ・ Optical neural network ・ Optical overheating protection ・ Optical parametric amplifier ・ Optical parametric oscillator ・ Optical path ・ Optical path length ・ Optical performance monitoring ・ Optical phase space ・ Optical phenomena ・ Optical physics ・ Optical power ・ Optical power budget ・ Optical power margin ・ Optical power meter ・ Optical printer ・ Optical projection tomography Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Optical overheating protection ： ウィキペディア英語版 Optical overheating protection With all solar thermal collector systems there is a potential risk that the solar collector may reach an equilibrium or stagnation temperature higher than the maximum safe operating temperature. Various measures are taken for optical overheating protection. Stagnation temperatures are encountered under conditions of high radiation while no heat transfer fluid is flowing through the collector, for example during power failures, component failures, servicing, energy storage capacity limitations, or periods when little hot water is extracted from the system.〔 More generally, stagnation conditions can be considered to be any situation under which the solar collector cannot adequately dispatch the absorbed solar heat to the heat transfer fluid. Besides any damaging effects to the system, high stagnation temperatures also place constraints on collector materials. These materials must retain their important properties during and after exposure to the high stagnation temperatures. This implies that solar collectors are generally built from high temperature resistant materials. These materials are usually expensive, heavy, and have an overall high environmental impact.〔 Polymeric materials offer a significant cost-reduction and environmental improvement potential for solar thermal collectors and may thus benefit a broader utilization of solar energy for various heating purposes. However, the long-term service temperature of plastics is limited. Thus, for potential applications of plastics in solar absorbers an appropriate design including overheating protection is essential.〔 Feasible ways would be a reduction in optical gain (for example, using thermotropic layers, or electrochromic devices) or an increase in system losses, by dumping of the hot water excess. In this article an alternative method to decrease the optical gain is presented. The method is based on the geometry of prisms and the phenomenon of Total Internal Reflection. == Working principle == According to Snell's law, light cannot escape from a medium when it strikes the medium boundary at an angle of incidence (θ) that is larger than the critical angle (θc), an optical phenomenon called Total Internal Reflection. The critical angle can be calculated using; $\backslash theta\; \_=Sin^(\backslash frac\}),\backslash ;\; \backslash frac\}\backslash leq\; 1$ 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Optical overheating protection」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.