Numerical evaluation of the effect of photovoltaic cell installation on urban thermal environment
Numerical evaluation of the effect of photovoltaic cell installation on urban thermal environment
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DOI：
10.1016/j.scs.2015.07.012
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发表时间：
2015-12-01
影响因子：
11.7
通讯作者：
Inoue, Yoshio
中科院分区：
文献类型：
--
作者：
Cortes, Aiza;Murashita, Yuji;Inoue, Yoshio
本文研究了太阳能光伏电池对建筑表面温度、城市空气温度和能量通量的影响。计算流体力学（CFD）与天气研究预报（WRF）模型和一维热传导模型相结合。在天气晴朗的情况下，安装太阳能光伏会导致建筑表面降温，但可能会产生特定的升温。在白天，由于有效的热对流和更大的天空视野因素导致空气循环，屋顶表面（2.1摄氏度）比墙壁（0.8摄氏度）的冷却效果更大。在夜间，由于遮阳作用，墙壁（4.3℃）比屋顶（1.4℃）的冷却效果更大。遮阳效果最大限度地减少了白天的热量吸收，从而减少了夜间的热量释放。地表温度的降低导致城市空气冷却，夜间温度可达0.4摄氏度。太阳能光伏的安装不影响人为热，但由于地表温度冷却，它可以减少感热通量并增加净辐射。屋顶光伏发电的输出功率比壁式光伏发电大63.5%，假设产生的电力将用于制冷，可以预期能耗的减少。(C) 2015 Elsevier Ltd.版权所有。
This study evaluates the impact of solar photovoltaic (PV) cell on building surface temperature, urbancanyon air temperature and energy fluxes. Computational fluid dynamics (CFD) coupled with weather research forecasting (WRF) model and one-dimensional heat conduction model are employed. Under clear weather conditions, the installation of solar PV leads to cooling of building surface but specific warming may occur. During daytime cooling effect is greater on the roof surface (2.1 degrees C) than on wall (0.8 degrees C) because of efficient thermal convection and greater sky view factor which leads to air circulation. During nighttime, cooling effect is greater on wall (4.3 degrees C) than on roof (1.4 degrees C) because of shading effect. Shading effect minimizes the heat absorption during daytime and hence minimizes heat release during nighttime. The reduced surface temperature leads to urban air cooling, up to 0.4 degrees C during nighttime. The installation of solar PV does not affect anthropogenic heat, however it can reduce sensible heat flux and increase net radiation as a consequence of surface temperature cooling. Roof PV produce power output 63.5% greater than wall PV and under the assumption that the power generated will be used for cooling, a decrease in energy consumption can be expected. (C) 2015 Elsevier Ltd. All rights reserved.