论文部分内容阅读
针对广州生活性街谷,在实地调研基础上,开展街谷热环境的数值模拟正交试验。研究结果表明:早中晚三时段走向对街谷热环境的贡献率较大,其次为高宽比和绿化,表面铺装的贡献率最小;最优街谷走向为东南-西北走向,高宽比取大为好,建筑高度统一较高低均布好;绿化的贡献率早晚小,中午大,早晚绿化覆盖率取小为好,中午绿化覆盖率取大为好(尤指支路级街谷);南北走向在晚上优于东西走向,其他时间东西走向优于南北走向;高宽比和走向的交互作用对街谷热环境有影响,但影响不大。通过寻优得到街谷热环境最优设计方案,结果显示,最优方案为较大高宽比的东西-南北走向街谷,减少辐射得热和增大风速是街谷热环境优化的主要方面。以热不满意率≤36%为设计目标,结合实际定量给出广州生活性街谷的优选设计方案和优化设计建议。
Based on the field surveys, we conducted an orthogonal experiment of the numerical simulation of the street valley thermal environment in Guangzhou. The results of the study show that the early-middle and late-morning periods have a greater contribution to the thermal environment in the street valley, followed by the aspect ratio and greening, and the contribution rate of surface paving is the smallest; the optimal street-valley trend is the southeast-northwest trend. Better than taking a good one, the height of the building is uniformly higher and lower; the contribution rate of greening is sooner or later, it is noon, and the green coverage rate is better. The good coverage of greening at noon is preferred (especially at the branch-level street level). The north-south trend is superior to the east-west direction in the evening, and the east-west trend is better than the north-south trend in other times; the interaction of the height-width ratio and trend has an impact on the thermal environment of the street valley, but has little impact. Through optimization, the optimal design plan for the thermal environment in the street valley was obtained. The results show that the optimal plan is the east-west and north-south valley with a large aspect ratio. Reducing heat gain from radiation and increasing wind speed are the main aspects of optimizing the thermal environment in the valley. . Taking the heat dissatisfaction rate as ≤36% as the design goal, combined with the actual quantitative analysis to give the optimal design plan and optimal design proposal for the street of life in Guangzhou.