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Solar and visible optical properties of glazing systems with Venetian blinds: Numerical, experimental and blind control study

机译：带百叶窗的玻璃系统的太阳光和可见光特性：数值，实验和盲控制研究

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摘要

The increasing use of glazed areas in the building envelope can lead to high solar gains and glare problems that can strongly impact the entire building energy consumption, peak loads and indoor comfort. An important and fundamental strategy in sustainable building design for controlling solar heat gains and daylighting through fenestration is the use of shading devices. Therefore, it is recommended to use detailed models that can accurately estimate the optical properties of the different types of shading devices (such as roller blinds and Venetian blinds) and include their effects in the glazing system analysis. This paper describes a net radiation method for determining both solar and visible optical properties of glazing with shading devices, particularly Venetian blinds. Some numerical results were compared with in situ experimental measurements carried out in an outdoor test cell. The experimental work included the measurement of illuminance and irradiance fluxes and the determination of the visible and solar transmission properties of the fenestration system. The agreement between numerical predictions and experimental results was better for overcast than clear sky conditions. Moreover, a Venetian blind control strategy that blocks direct solar radiation, whilst enabling the transmission of diffuse radiation to indoors, is implemented.
机译：建筑围护结构中玻璃面积的增加使用会导致大量的日光吸收和眩光问题，这些问题会严重影响整个建筑的能耗，峰值负荷和室内舒适度。在遮阳可持续性建筑设计中，通过开窗控制太阳热量获取和采光的一项重要且基本的策略是使用遮阳设备。因此，建议使用详细的模型，这些模型可以准确地估计不同类型的遮光设备（例如，卷帘和百叶窗）的光学特性，并将其影响包括在玻璃系统分析中。本文介绍了一种净辐射方法，用于确定遮阳设备（尤其是百叶窗）的玻璃的日光和可见光光学特性。将一些数值结果与在室外测试池中进行的原位实验测量进行了比较。实验工作包括照度和辐照通量的测量以及开窗系统的可见光和太阳光透射特性的确定。阴天数值预报与实验结果之间的一致性比晴空条件更好。此外，实施了一种遮光百叶窗控制策略，该策略可以阻止直接的太阳辐射，同时又可以将漫射辐射传输到室内。

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