ABSTRACT

Achieving efficient solutions for saving energy in buildings has become one of the significant concerns in recent years. Heating and cooling passive systems such as Trombe wall, solar chimney, and plant wall has proved to be practical, especially in hot and dry climatic conditions. In the present work, a hybrid passive system comprised of a solar chimney and a domed roof has been numerically modeled to improve the indoor air temperature distribution and comfort conditions in a test room located in Yazd, Iran. For the purpose of this study, two scenarios were investigated: various heights of the domed roof (four cases) and different locations of the inlet vents (five cases). The results included air temperature distribution, average air velocity and mass flow rate in the vents as well as comfort conditions. According to the results, the domed roof with 0.7 m height resulted in the best performance in terms of comfort conditions. Furthermore, placing the inlet vents in the lower part of the room led to more ventilation of air and better air temperature distribution and comfort conditions compared to other arrangements of the inlet vents.

摘要

实现建筑节能的有效解决方案已成为近年来的重要关注点之一。加热和冷却被动系统，如 Trombe 墙、太阳能烟囱和植物墙已被证明是实用的，特别是在炎热和干燥的气候条件下。在目前的工作中，对一个由太阳能烟囱和圆顶屋顶组成的混合被动系统进行了数值模拟，以改善位于伊朗亚兹德的测试室的室内空气温度分布和舒适条件。出于本研究的目的，研究了两种情况：圆顶屋顶的不同高度（四个案例）和进气口的不同位置（五个案例）。结果包括空气温度分布、通风口中的平均空气速度和质量流量以及舒适条件。根据结果​​，高度为 0.7 m 的圆顶屋顶在舒适条件方面具有最佳性能。此外，与其他布置的进风口相比，将进风口放置在房间的下部会导致更多的空气通风以及更好的空气温度分布和舒适条件。