Abstract

The skylight on the roof of an atrium can be popular for commercial malls to illuminate the core area of the building. However, the solar radiation and its heat can get into the building together with the daylight, causing excessive cooling load. This paper studies the daylighting and energy performances of skylight coverage area for the air-conditioned atriums in the hot and humid regions. The energy performance with different atrium heights, glass types and the coverage ratios of the skylight are studied. The daylight performance was simulated by the ray-tracing Radiance and was transferred into EnergyPlus for energy evaluations. The finding suggested that, for hot and humid climates, the skylight coverage ratio should be controlled carefully to prevent the excessive solar heat gain. When the on/off lighting control is applied, the total energy consumption of the single-floor cases (or of the top floor for the multi-floor cases) leveled off when the coverage ratio of the skylight reached 9%. Thus, the skylight is favorable to the energy saving of the low-rise or single-floor commercial buildings only under the current assumptions, as the ground of the atrium cannot be well illuminated while the excessive solar radiation gets into the building. The skylight should be shaded in cooling seasons to prevent the excessive solar heat gains.

中文翻译：

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湿热地区空调中庭天窗覆盖率研究

摘要

中庭屋顶的天窗可以为商业商场提供照明，以照亮建筑物的核心区域。然而，太阳辐射及其热量会与日光一起进入建筑物，导致过度的冷负荷。本文研究了湿热地区空调中庭天窗覆盖区域的采光和能源性能。研究了不同中庭高度、玻璃类型和天窗覆盖率的能源性能。日光性能由光线追踪 Radiance 模拟，并传输到 EnergyPlus 中进行能量评估。研究结果表明，对于炎热和潮湿的气候，应谨慎控制天窗覆盖率，以防止过度吸收太阳热量。当应用开/关照明控制时，当天窗覆盖率达到9%时，单层机箱（或多层机箱顶层）的总能耗趋于平稳。因此，仅在目前的假设下，天窗有利于低层或单层商业建筑的节能，因为过多的太阳辐射进入建筑物时无法很好地照亮中庭地面。天窗应在凉爽的季节遮阳，以防止过多的太阳热量增益。因为当过多的太阳辐射进入建筑物时，中庭的地面不能被很好地照亮。天窗应在凉爽的季节遮阳，以防止过多的太阳热量增益。因为当过多的太阳辐射进入建筑物时，中庭的地面不能被很好地照亮。天窗应在凉爽的季节遮阳，以防止过多的太阳热量增益。