This paper investigates the main characteristics of daylight on any window in a street canyon.The sky component and the light reflected from the surroundings are described to determine the vertical daylight factor(VDF...This paper investigates the main characteristics of daylight on any window in a street canyon.The sky component and the light reflected from the surroundings are described to determine the vertical daylight factor(VDF).Several street canyon types are characterized taking into account their different height/width and any level of the window is analysed.A simple calculation method uses trigonometric equations based on the sky and the geometry of the canyon.The results were previ-ously evaluated considering different daylight procedures obtained by other studies.This study reveals that the reflectance within an urban canyon plays an important role in the amount of daylight onto any window with more relevance in a deep canyon and low sky view.The graphical presentation that result from this investiga-tion can rapidly assist building and urban designers in an early stage design where assumptions and the lay out of the main design take place.展开更多
Light levels in the churches of the Cistercian Order are mostly related to the fulfilment of liturgical needs.The compound building of Bernardas’Convent includes a church at the utmost southern corner that dates back...Light levels in the churches of the Cistercian Order are mostly related to the fulfilment of liturgical needs.The compound building of Bernardas’Convent includes a church at the utmost southern corner that dates back to the 17th century.It only has one façade facing due southeast.This paper analyses the relationship between daylight conditions within the building before and after the urbanisation of the surrounding area;taking into account the relationship between the church,its main activities,and solar trajectory.A comparative analysis of the relationship between the actual surrounding context and the initial period after it was built(open field)is given.The highest reflectance of the street canyon has augmented the levels of available daylight.展开更多
间隙排列PV结构兼具遮阳、采光、发电等性能,宜用作建筑顶部采光设施.文中针对广州地区的气候条件,对4种不同参数的PV结构进行对比研究,综合考虑采光性能与发电能力,选出了PV面板安装的最优方案,即PV面板与水平面之间呈60°倾角,以...间隙排列PV结构兼具遮阳、采光、发电等性能,宜用作建筑顶部采光设施.文中针对广州地区的气候条件,对4种不同参数的PV结构进行对比研究,综合考虑采光性能与发电能力,选出了PV面板安装的最优方案,即PV面板与水平面之间呈60°倾角,以此在保证较高采光能力的同时提供良好的发电能力;通过在设计案例中的应用对间隙排列PV结构的采光及发电性能进行了分析,结果表明:该间隙型PV结构具有良好的遮阳效果,其下方10 m处地面的平均采光系数为4.9%,年度累计发电能力为61.8 k W·h/m2.展开更多
基金supported with Portuguese national funds by FCT-Foundation for Science and Technology within the UID/ECI/04082/2013 project.
文摘This paper investigates the main characteristics of daylight on any window in a street canyon.The sky component and the light reflected from the surroundings are described to determine the vertical daylight factor(VDF).Several street canyon types are characterized taking into account their different height/width and any level of the window is analysed.A simple calculation method uses trigonometric equations based on the sky and the geometry of the canyon.The results were previ-ously evaluated considering different daylight procedures obtained by other studies.This study reveals that the reflectance within an urban canyon plays an important role in the amount of daylight onto any window with more relevance in a deep canyon and low sky view.The graphical presentation that result from this investiga-tion can rapidly assist building and urban designers in an early stage design where assumptions and the lay out of the main design take place.
文摘Light levels in the churches of the Cistercian Order are mostly related to the fulfilment of liturgical needs.The compound building of Bernardas’Convent includes a church at the utmost southern corner that dates back to the 17th century.It only has one façade facing due southeast.This paper analyses the relationship between daylight conditions within the building before and after the urbanisation of the surrounding area;taking into account the relationship between the church,its main activities,and solar trajectory.A comparative analysis of the relationship between the actual surrounding context and the initial period after it was built(open field)is given.The highest reflectance of the street canyon has augmented the levels of available daylight.
文摘间隙排列PV结构兼具遮阳、采光、发电等性能,宜用作建筑顶部采光设施.文中针对广州地区的气候条件,对4种不同参数的PV结构进行对比研究,综合考虑采光性能与发电能力,选出了PV面板安装的最优方案,即PV面板与水平面之间呈60°倾角,以此在保证较高采光能力的同时提供良好的发电能力;通过在设计案例中的应用对间隙排列PV结构的采光及发电性能进行了分析,结果表明:该间隙型PV结构具有良好的遮阳效果,其下方10 m处地面的平均采光系数为4.9%,年度累计发电能力为61.8 k W·h/m2.
