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Thermal performance characteristics of unshaded courtyards in hot and humid climates

机译：炎热潮湿气候下无遮蔽庭院的热性能特征

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摘要

In recent years, there has been a growing interest in the design of courtyards for the microclimatic enhancement of outdoor spaces. However, there is still little knowledge regarding the thermal performance characteristics of courtyards, particularly in hot and humid climates. This study evaluates the ability of unshaded courtyards for providing thermally comfortable outdoor spaces according to different design configurations and scenarios, including the orientations, height and albedo of wall enclosure, and use of vegetation. The software ENVI-met was used as a tool for simulating the thermal performance of courtyards in the hot and humid climate of Kuala Lumpur, Malaysia. The PMV and the number of hours per day that a courtyard could be enjoyed once the proposed design suggestions were implemented are assessed. Likewise, the Physiologically Equivalent Temperature (PET) index allowed to further explore the thermal comfort conditions of courtyards. As a result, guidelines are proposed in order to optimize the design of courtyards towards enhancing their thermal performance characteristics. In particular, the study shows that according to design parameters such as the building height ratio, an abundance in the amount vegetation the courtyard can achieve an acceptable level of thermal comfort for the tropics and may be enjoyed by its users for a long duration of daytime even during the noontime. Finally, this paper stresses that only well designed courtyards may represent a valid option for sustainable built environments.
机译：近年来，人们对设计用于改善室外空间的微气候的庭院越来越感兴趣。然而，关于院子的热性能特征，尤其是在炎热和潮湿的气候下，人们仍然知之甚少。这项研究根据不同的设计配置和方案（包括墙壁围墙的方向，高度和反照率以及植被的使用情况）评估了无阴影庭院提供热舒适室外空间的能力。 ENVI-met软件被用作模拟马来西亚吉隆坡炎热潮湿气候下庭院热性能的工具。一旦实施了建议的设计建议，便会评估PMV和每天可以使用庭院的小时数。同样，生理等效温度（PET）指数可以进一步探索庭院的热舒适条件。结果，提出了指导方针，以便优化庭院的设计以增强其热性能特征。特别是，研究表明，根据诸如建筑高度比之类的设计参数，庭院中植被的丰富度可以为热带地区提供可接受的热舒适水平，并且其用户可以长时间使用即使在中午。最后，本文强调只有精心设计的院子才能代表可持续建筑环境的有效选择。

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