室外天然光照强度地域化分布研究

Research on regional distribution of outdoor natural light intensity

天然光照强度作为重要的光环境评价指标,在建筑采光设计中有着广泛的应用,然而现有气象站点的监测数据中并没有天然光照强度数据,需要通过间接计算来获得。国家气象局气象科学研究院吴其劻学者及其团队曾于1987年提出通过计算总辐射光当量来间接计算天然光照强度值的方法,依据此方法能用既有的气象站点监测数据计算出天然光照强度值。然而此方法存在一定的局限性,其计算结果只能准确反映该站点位置的天然光照强度值,无法整体反映某一地域的天然光照强度分布及其变化情况。故根据此方法,结合ArcGis10.2软件将此方法的应用范围拓宽到能计算某一地域整体天然光照强度分布,弥补了此方法的不足。并以江西省赣州市为例,绘制出逐月、全年平均天然光照强度分布图,为建筑采光设计提供依据。

As an important evaluation index of light environment,natural light intensity has been widely used in building lighting design.However,there is no natural light intensity data in the monitoring data of existing meteorological stations,which needs to be obtained through indirect calculation.In 1987,Wu Qikuang,a scholar at the Institute of Meteorological Sciences of the National Meteorological Administration,and his team proposed a method to calculate the natural light intensity indirectly by calculating the total radiant light equivalent.However,this method has some limitations,its calculation results can only accurately reflect the natural light intensity value of the site location,but can not reflect the distribution and change of natural light intensity in a certain region.Therefore,according to this method,in this paper,the ArcGis10.2 software is combined to expand the application scope of this method to calculate the overall natural light intensity distribution in a certain region,so as to make up for the shortcomings of this method.Taking Ganzhou City of Jiangxi Province as an example,the average natural light intensity distribution map is drawn month by month and year,which provides basis for building lighting design.