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Effect of building integrated photovoltaics on microclimate of urban canopy layer

机译：建筑一体化光伏发电对城市冠层微气候的影响

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摘要

Building integrated photovoltaics (BIPV) has potential of becoming the mainstream of renewable energy in the urban environment. BIPV has significant influence on the thermal performance of building envelope and changes radiation energy balance by adding or replacing conventional building elements in urban areas. PTEBU model was developed to evaluate the effect of photovoltaic (PV) system on the microclimate of urban canopy layer. PTEBU model consists of four sub-models: PV thermal model, PV electrical performance model, building energy consumption model, and urban canyon energy budget model. PTEBU model is forced with temperature, wind speed, and solar radiation above the roof level and incorporates detailed data of PV system and urban canyon in Tianjin, China. The simulation results show that PV roof and PV facade with ventilated air gap significantly change the building surface temperature and sensible heat flux density, but the air temperature of urban canyon with PV module varies little compared with the urban canyon of no PV. The PV module also changes the magnitude and pattern of diurnal variation of the storage heat flux and the net radiation for the urban canyon with PV increase slightly. The increase in the PV conversion efficiency not only improves the PV power output, but also reduces the urban canyon air temperature.
机译：建筑集成光伏（BIPV）有潜力成为城市环境中可再生能源的主流。 BIPV对建筑围护结构的热性能产生重大影响，并通过在城市地区添加或替换常规建筑元素来改变辐射能量的平衡。建立了PTEBU模型以评估光伏（PV）系统对城市冠层微气候的影响。 PTEBU模型包含四个子模型：PV热模型，PV电气性能模型，建筑能耗模型和城市峡谷能源预算模型。 PTEBU模型受屋顶温度以上的温度，风速和太阳辐射的影响，并结合了中国天津的光伏系统和城市峡谷的详细数据。仿真结果表明，带有通风间隙的PV屋顶和PV立面会显着改变建筑表面温度和显热通量密度，但是带有PV模块的城市峡谷的空气温度与没有PV的城市峡谷相比变化不大。 PV模块还会随着PV的增加而略微改变城市峡谷的储热通量和净辐射日变化的大小和模式。光伏转换效率的提高不仅提高了光伏发电量，还降低了城市峡谷的气温。

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