Integration of green roof and solar photovoltaic systems
Integration of green roof and solar photovoltaic systems
复制标题
屋顶绿化与太阳能光伏系统一体化
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
S. Chan
中科院分区：
文献类型：
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作者：
Sam C. M. Hui;S. Chan
绿色屋顶和太阳能光伏系统是两项有助于可持续建筑发展和减少温室气体排放的技术。当它们在建筑屋顶上组合在一起时，可以通过冷却和遮阳效果来增强它们的功能和效果。本文阐述了一项研究的主要结果，研究整合绿色屋顶和太阳能光伏系统的好处。评估了影响两个系统之间相互作用的重要因素。通过理论模型、实验和现场研究分析了热效应和能量效应。一个假设的案例研究，以改造屋顶的现有建筑在香港这样的整合进行评估的实际设计问题。实验结果表明，这种集成的积极影响：绿色屋顶表面和土壤温度降低，从遮阳和更高的功率输出的光伏电池板是从冷却实现。利用EnergyPlus为一幢低层商业楼宇进行的全年建筑物能源模拟结果显示，综合系统的空调能耗略低于独立系统，而采用综合方法的光伏系统比独立方案多产生8. 3%的电力。效益的程度取决于系统的设计和如何确定特定建筑工地的最佳安排。
Green roof and solar photovoltaic (PV) systems are two technologies that could contribute to sustainable building development and reduction of greenhouse gas emissions. When they are combined together on the building roof, it can enhance their functions and effectiveness by cooling and shading effects. This paper explains the major findings of a research to study the benefits of integrating green roof and solar PV systems. The important factors affecting the interactions between the two systems are assessed. The thermal and energy effects are analysed by theoretical models, experiments and field studies. A hypothetical case study to retrofit the roof of an existing building in Hong Kong with such integration is carried out to evaluate the practical design issues. The experimental results showed a positive influence for this integration: green roof surface and soil temperatures are reduced from the shading and higher power output of PV panel is achieved from the cooling. The findings of year-round building energy simulation using EnergyPlus for a low rise commercial building indicated that the energy consumption for air conditioning of the integrated system is slightly lower than the stand-alone system and the PV system on integrated approach generates 8.3% more electricity than the stand-a-lone option. The extent of the benefits depends on the system design and how to determine the optimum arrangement for a particular building site.