夏热冬暖地区某开敞式大空间建筑的节能改造技术分析

为了探讨夏热冬暖地区开敞式大空间建筑的节能改造措施,以广州市某实际工程为例,应用Fluent软件,对自然通风、置换通风、遮阳、屋顶淋水降温的节能效果进行了定性分析,并应用DeST软件模拟了全年能耗。分析了自然通风与空调系统联合工作时的室内温度和速度场,并给出了室内温湿度的实测数据。结果表明:在该工程中,自然通风、置换通风、遮阳挡板和屋面淋水技术可明显改善室内热环境,同时降低建筑能耗;下沉式地面有利于增强室内置换通风效果;通过采用被动节能技术合理设计后,建筑节能率达61.9%。

Analysis on energy saving techniques for retrofitting an open large space building in hot summer and warm winter zone

To study the applicable measures of energy saving retrofitting for this kind of buildings,with an actual project as example,analyses qualitatively the energy saving effect of natural ventilation,displacement ventilation,shading and roof sprinkling by Fluent software,and analyses the annual energy consumption by DeST software.Presents the simulated distribution of temperature and velocity,and the tested temperature and relative humidity on the condition of natural ventilation combined with air conditioning.Concludes that natural ventilation,displacement ventilation,shading and roof sprinkling can improve the indoor environment and reduce the energy consumption distinctly;the sloping auditorium and sunk arena contributes to improving indoor displacement ventilation effect;the energy consumption can be decreased by 61.9 percent by passive energy saving technique.