可渗透路面的智能润湿作为一种蒸发冷却措施,在热浪期间改善城市气候

IF 1.8 4区 工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY
A. Kubilay, A. Ferrari, D. Derome, J. Carmeliet
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引用次数: 19

摘要

利用城市微气候模型设计多层街道路面的智能润湿方案,以最大限度地提高蒸发冷却效果,作为热浪期间热不适的缓解措施。微气候模型建立在计算流体动力学(CFD)模型的基础上,用于求解街道峡谷空气域中的湍流空气、热量和水分流动。CFD模型与多孔城市材料中的热量和水分输运模型和辐射交换模型耦合,确定每个城市表面的净太阳辐射和热辐射。采用毛细管泵送和毛细管断裂原理优化了最大蒸发冷却的两层路面系统,考虑设计一种智能润湿方案,回答“何时”、“多少”和“多长时间”的问题。研究发现,对于目前优化的路面解决方案,每天在早上10分钟内,特别是在8点到10点之间,每天6毫米的润湿量,可以保证在热浪中24小时的最大蒸发冷却。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Smart wetting of permeable pavements as an evaporative-cooling measure for improving the urban climate during heat waves
An urban microclimate model is used to design a smart wetting protocol for multilayer street pavements in order to maximize the evaporative cooling effect as a mitigation measure for thermal discomfort during heat waves. The microclimate model is built upon a computational fluid dynamics (CFD) model for solving the turbulent air, heat and moisture flow in the air domain of a street canyon. The CFD model is coupled to a model for heat and moisture transport in porous urban materials and to a radiative exchange model, determining the net solar and thermal radiation on each urban surface. A two-layer pavement system, previously optimized for maximal evaporative cooling applying the principles of capillary pumping and capillary break, is considered to design a smart wetting protocol answering the questions “when,” “how much,” and “how long” a pavement should be artificially wetted. It was found for the current optimized pavement solutions that a daily amount of 6 mm wetting over 10 min in the morning, preferentially between 8:00 and 10:00, guarantees a maximal evaporative cooling for 24 h during a heat wave.
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来源期刊
Journal of Building Physics
Journal of Building Physics 工程技术-结构与建筑技术
CiteScore
5.10
自引率
15.00%
发文量
10
审稿时长
5.3 months
期刊介绍: Journal of Building Physics (J. Bldg. Phys) is an international, peer-reviewed journal that publishes a high quality research and state of the art “integrated” papers to promote scientifically thorough advancement of all the areas of non-structural performance of a building and particularly in heat, air, moisture transfer.
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