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| 半透明光伏天窗传热、发电与遮阳性能实验研究 |
| Experimental study on heat transfer, power generation and shading performance of semi-transparent photovoltaic skylight glazing |
| 投稿时间：2023-12-05 |
| DOI：10.13259/j.cnki.eri.2025.04.004 |
| 中文关键词: 半透明光伏玻璃 天窗 遮阳 传热性能 |
| 英文关键词:semi-transparent photovoltaic glass skylight shading thermal performance |
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| 中文摘要: |
| 对3种光伏玻璃（可见光透过率τ为10%的单层光伏玻璃以及τ分别为20%和40%的中空光伏玻璃）应用于天窗时的传热、发电与遮阳性能进行了实验研究，并分析了空气层和τ对这3种性能的影响。实验测得单层光伏天窗（τ=10%）、中空光伏天窗（τ=20%、40%）的总传热系数U分别为5.31、3.26、3.18 W/(m2·K)，发电效率均值分别为6.21%、6.14%和5.34%，太阳光直接透射比分别为0.081、0.098和0.137。结果表明，空气层的热绝缘作用可阻挡热量由室外向室内传递，从而降低中空组件室内侧表面温度。这对夏季减少因光伏玻璃温升而进入室内的热量以及冬季减少室内向室外传递的热量均有很好的效果。τ越大，透过玻璃进入室内的平均太阳辐射量越大，光伏电池覆盖面积越小，所吸收的太阳辐射量越少，发电效率越高。经对比发现，通过中空光伏玻璃（τ为20%）进入室内的太阳辐射得热量仅为传统中空玻璃的15.01%和Low–E镀膜中空玻璃的18.96%。 |
| 英文摘要: |
| An experimental study was conducted on the heat transfer, power generation, and shading performance of a single-layer photovoltaic glass skylight with a visible light transmittance τ of 10%, and two double-glazed photovoltaic units with τ values of 20% and 40%. The influence of the air gap and light transmittance on these three aspects of performance was analyzed. The measured overall heat transfer coefficients U were 5.31, 3.26, and 3.18 W/(m2·K) for the single-layer (τ=10%) and the two double-glazed units (τ=20%, 40%). Their average power generation efficiencies were 6.21%, 6.14%, and 5.34%, and the corresponding direct solar transmittance values were 0.081, 0.098, and 0.137. The results indicate that the thermal insulation provided by the air within the sealed cavity effectively blocks heat transfer from the outdoor side to the indoor side, thereby reducing the temperature of the indoor surface of the double-glazed unit. This proves beneficial for reducing unwanted heat gain through the photovoltaic glass during summer and minimizing heat loss from indoors to outdoors during winter. A higher τ value leads to a greater average amount of solar radiation transmitted into the interior. A smaller coverage area of the photovoltaic cells results in less absorbed solar radiation and consequently a higher power generation efficiency. Comparative analysis shows that the solar radiation entering the indoor environment through the double-glazed photovoltaic glass (τ=20%) is only 15.01% and 18.96% of that transmitted through conventional double glazing and Low-E coated double glazing, respectively. |
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