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An evaluation of outdoor and building environment cooling achieved through combination modification of trees with ground materials

机译：通过树木与地面材料的组合改性实现的室外和建筑环境降温评估

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摘要

This study focuses on the optimum cooling effect of trees with ground materials modification in mitigating the urban heat island (UHI) and the benefits towards building energy performance in tropical climate. The modification focused on both physical properties - i.e. tree canopy density and quantity; and the albedo values of ground materials. Two phases of methodology were developed and applied using field measurement and computer simulation. This study measured the average monthly UHI intensity found to be +2.6 °C. In mitigating its impact, higher levels of tree canopy density (LAI 9.7) coupled with "cool" materials (albedo of 0.8) produced the largest urban air temperature reduction. Simulations predicted an average air temperature reduction of 2.7 °C when compared with the current condition. Further, both modifications were found to produce a potential building cooling load reduction of up to 29%. In fact, the optimum improvement of both outdoor and indoor environment was influenced by three major physical factors, namely, larger tree quantity, higher canopy density and cool materials. Thus, it is suggested that appropriate guidelines, influencing implementation of these improvements could be implemented in order to mitigate the UHI effect in tropical climate.
机译：这项研究的重点是通过对树木进行地面材料改良来减轻城市热岛（UHI）的最佳降温效果，以及在热带气候下对建筑节能的益处。修改着重于两个物理属性-即树冠的密度和数量；以及地面材料的反照率值。使用现场测量和计算机仿真技术开发并应用了两个阶段的方法。这项研究测得的月平均UHI强度为+2.6°C。为了减轻其影响，较高的树冠密度（LAI 9.7）结合“凉爽”的材料（反射率0.8）可最大程度地降低城市气温。模拟预测与当前条件相比，平均空气温度降低2.7°C。此外，发现这两种修改都可以使建筑物的冷却负荷降低多达29％。实际上，室外和室内环境的最佳改善受到三个主要物理因素的影响，即树木数量更大，树冠密度更高和材料凉爽。因此，建议可以实施影响这些改进措施实施的适当指导方针，以减轻热带气候中UHI的影响。

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