城市更新背景下基于CFD模拟的垃圾转运站选址优化策略——以杭州戒坛寺巷为例

Optimization Strategy of Waste Transfer Station Location based on CFD Simulation under the Background of Urban Renewal:Taking Jietan Temple Lane in Hangzhou as an Example

以杭州戒坛寺巷垃圾转运站选址对周边影响为研究对象,拟定2个变更选址方案,通过CFD软件Airpak对不同季节下空气污染物H2S的扩散情况进行模拟,通过加权计算全年风频和风速条件,对比原址与变更选址方案的优劣。结果表明,选址1方案能够保证街区得到平均最低空气污染物水平。转运站布置在建筑转角或者庭院中,不利于空气污染物扩散;当布置在长条板式建筑周边时,扩散速度快,有助于降低空气污染物浓度。

Taking the influence of site selection of garbage transfer station in Jietan Temple Lane in Hangzhou on the surrounding area as the research object,two change site selection schemes were formulated.The diffusion of hydrogen sulfide in air pollutants under different seasons was simulated by CFD software Airpak.The annual wind frequency and wind speed conditions were calculated by weighting,and the advantages and disadvantages of the original site and the change site selection scheme were compared.The results show that the location 1 scheme can ensure the average minimum air pollutant level of the block.The transfer station is arranged in the building corner or courtyard,which is not conducive to the diffusion of air pollutants;when arranged around the long slab building,the diffusion speed is fast,which helps to reduce the concentration of air pollutants.