SketchUp平台下的围合空间太阳辐射计算模型

SOLAR RADIATION CALCULATION MODEL OF ENCLOSURE SPACE BASED ON SketchUp

该文基于SketchUp平台建立了围合空间太阳辐射计算模型。首先通过Ruby接口从SketchUp平台中导出围合建筑模型的瞬时阴影图像,同时针对围合空间建筑群相互遮挡形成阴影图像的特点,提出一种基于像素的HIS色彩空间建筑阴影检测算法,用来对围合空间建筑立面遮挡部分进行区分和量化,进而结合传统短波辐射计算方法来估算围合空间中某建筑立面短波辐射强度。通过多地的实测数据验证了该模型的有效性,表明该模型适用于围合空间中建筑立面的太阳辐射计算,为建筑设计人员在设计规划城市建筑时准确估计城市围合空间中建筑立面的太阳辐射强度提供更为方便、快捷的计算方式。

Based on the SketchUp,a calculation model for enclosed space’s solar radiation is established.Instant shadow images of the enclosed buildings model is exported from the SketchUp through the Ruby.According to the characteristics of these shadow images formed by the enclosed space buildings,a pixel-based HIS color space building shadow detection algorithm is proposed to distinguish and quantify the occluded part of the enclosed space building facade;then the traditional short wave radiation calculation method is adopted to estimate the short wave radiation intensity of a building facade in the enclosed space.The verification of the model was done by using the measured data obtained by testing in some cities,proving that the model is suitable for the calculation of solar radiation on the building facade in the enclosed space,which provides a more convenient and quick calculation method for architectural designers to accurately estimate the solar radiation intensity of the building facade in the urban enclosed space when it comes to designing and planning urban buildings.