建筑密度对建筑物群内风能利用的影响

INFLUENCE OF BUILDING DENSITY ON WIND ENERGY UTILIZATION IN BUILDINGS

针对建筑物群内风能应用问题,采用CFD方法,对建筑密度分别为26%、20%、18%、16%、14%的5种建筑物群周围风速和湍流强度特征开展研究,分析建筑密度对建筑物群内风力机合理安装位置的影响方式。结果表明:在低于1.5H高度范围内,建筑物群的建筑密度越大,同一安装高度上适合于安装风力机的区域就越大,即越有利于建筑物群内风能的应用;在高度高于1.5H后,建筑密度对建筑物群内风力机安装位置的影响消失;无论建筑密度大小,在低于1.2H的高度范围内,建筑物群内不适合安装风力机;在高度高于1.45H后,可优先考虑将风力机安装于建筑物群内中间一排建筑物顶面,在建筑物顶面可优先将风力机安装于拐角位置;5种建筑密度的建筑物群内只考虑风速要求即可确定风力机的合理安装位置。

To determine the suitable mounting location of the wind turbine in building arrays with area density of 26%,20%,18%,16%and 14%,respectively,wind velocity and turbulence intensity over the aligned building arrays with flat roof were simulated via the computational fluid dynamic(CFD)method.Results from this investigation shown that within the height range of less than 1.5H,the larger the area suitable for installing wind turbines at the same installation height with the higher area densities in the building arrays,which is more conducive to the application of wind energy in the building arrays;Meanwhile,For the height is higher than 1.5H,the influence of the area density on location of wind turbine can be ignored;When the height is lower than 1.2H,it is not suitable to install wind turbines in the building arrays with five area density.Moreover,for the height is higher than 1.45H,wind turbines should be installed on the top of the middle row of buildings in the building arrays,while the corner of the rooftop are the best installation locations;In addition,the installation location of wind turbines can be determined by only considering the wind speed in the building arrays with five area densities.