A Sensitivity Study Relating to Neighbourhood-scale Fast Local Urban Climate Modelling within the Built Environment
A Sensitivity Study Relating to Neighbourhood-scale Fast Local Urban Climate Modelling within the Built Environment
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DOI：
10.1016/j.proeng.2017.07.113
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Y. Aktas;J. Stocker;D. Carruthers;J. Hunt
中科院分区：
文献类型：
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作者：
Y. Aktas;J. Stocker;D. Carruthers;J. Hunt
在上个世纪，城市人口的迅速增加，加上气候变化的威胁，促使人们集中研究土地使用对城市气候的影响。高分辨率的邻里规模的建模工具，以考虑到复杂的三维表面和体积内的城市地区能够预测温度扰动的城市域参考不同的土地使用。然而，选择的土地利用类来模拟城市景观往往反映的功能，而不是材料，因此忽略了不同的建筑材料，组成的建成environment. This研究的目的是要证明，一个强大的评估当地气候变化，重要的是要使用代表性的土地利用参数，占材料，形成城市景观，而不是功能。高分辨率的本地气候模式的响应，以改善参数化的建筑环境的调查使用本地尺度的城市气候模拟工具，ADMS-Urban。在这项研究中，一组更详细的土地利用类别进行整理，区分不同的建筑材料，具有不同的热参数。提出了一种新的计算热导纳的方法，反映了建筑立面和屋顶使用的不同建筑材料。这项研究表明，细化模型输入参数以正确表示城市组织中使用的各种建筑材料，以及提出的计算热导纳的先进方法，与使用广泛假设时相比，会导致显着的温度差异，特别是在赤道城市常见的低风速条件下。
The rapid increase in urban populations during the last century, together with the threat of climate change has motivated research focusing on the impact of land-use on urban climates. High-resolution neighbourhood-scale modelling tools developed to account for the complex three-dimensional surfaces and volumes within an urban area are able to predict temperature perturbations over an urban domain with reference to varying land-use. However, land-use classes chosen to model the urban landscape often reflect the function, rather than the material, and hence overlook different building materials that compose the built environment.The purpose of this study is to demonstrate that for a robust appraisal of local climate variations, it is important to use representative land-use parameters that account for materials that form the urban landscape, instead of functions. The response of a high-resolution local climate model to an improved parameterization of the built environment is investigated using the local-scale urban climate modelling tool, ADMS-Urban. In this study, a more elaborate set of land-use classes is collated which distinguishes between different building materials that have varying thermal parameters. A novel approach to calculating the thermal admittance is proposed, reflecting different building materials used for the building facades and the roofs.This study demonstrates that refining model input parameters to correctly represent various construction materials used within the urban tissue, as well as the proposed, advanced method for calculating thermal admittance leads to significant temperature differences compared to when broad assumptions are used, especially under low wind conditions common in equatorial cities.