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首页> 外文期刊>Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion >The effect of glass coating emittance and frame rebate on heat transfer through vacuum and electrochromic vacuum glazed windows
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The effect of glass coating emittance and frame rebate on heat transfer through vacuum and electrochromic vacuum glazed windows

机译：玻璃涂层的发射率和框架折扣对通过真空和电致变色真空玻璃窗的传热的影响

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The thermal performance of an electrochromic vacuum glazing and a vacuum glazing with a range of low-emittance coatings and frame rebate depths were simulated for insolations between 0 and 1000 W m(-2) using a three-dimensional finite volume model. The vacuum glazing simulated comprised two 0.4 m x 0.4 m glass panes separated by a 0.12 mm wide evacuated space supported by a 0.32 mm diameter pillar array spaced at 25 mm. The two glass sheets were sealed contiguously by a 6 mm wide metal edge seal and had either one or two low-emittance coatings. For the electrochromic vacuum glazing, a third glass pane on which an electrochromic layer was deposited was assumed to be sealed to an evacuated glass unit, to enable control of visible light transmittance and solar gain and thus improve occupant thermal comfort. It is shown that for both vacuum glazing and electrochromic vacuum glazings, when the coating emittance value is very low (close to 0.02), the use of two low-emittance coatings only gives limited improvement in glazing performance. The use of a single currently expensive low-emittance coating in both systems provided acceptable performance. Deeper frame rebate depths gave significant improvements in thermal performance for both glazing systems. (c) 2006 Elsevier B.V. All rights reserved.
机译：使用三维有限体积模型，模拟了0至1000 W m（-2）之间的日照，对电致变色真空玻璃和具有一定范围的低发射率涂层和框架回扣深度的真空玻璃的热性能进行了模拟。模拟的真空玻璃窗包括两个0.4 m x 0.4 m的玻璃板，这些玻璃板由0.12 mm的抽真空空间分隔开，该空间由直径为25mm的0.32 mm的支柱阵列支撑。这两块玻璃板被6mm宽的金属边缘密封件连续密封，并具有一层或两层低发射率涂层。对于电致变色真空玻璃窗，假设将其上沉积有电致变色层的第三玻璃窗格密封到抽气的玻璃单元上，以能够控制可见光透射率和太阳增益，从而提高乘员的热舒适性。结果表明，对于真空玻璃和电致变色真空玻璃，当涂层发射率值非常低（接近0.02）时，使用两种低辐射率涂层只会给玻璃性能带来有限的改善。在两个系统中使用单个当前昂贵的低发射率涂层可提供可接受的性能。较深的框架回扣深度极大地改善了两种玻璃系统的热性能。 （c）2006 Elsevier B.V.保留所有权利。

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