The work studies the turbulent fluid flow under the effect of natural convection within a solar chimney power plant (SCPP). This study is carried out by numerical simulation using the Saturne code coupled to the Syrthes code. Geometric modifications were brought upon the chimney outlet. Divergent shape with different exit sections was set at the tower outlet. The study is undertaken for two types of solar chimney power plant. In the first configuration, only soil below the collector is considered as a storage system. In the second one, the storage system is composed of the soil and a 10 cm thick tub filled with water, covering the entire surface of the collector. The boundary conditions will be defined according to meteorological data, for a typical day available on the site of Adrar, Algeria. The results allow us to focus on the storage system influence on the SCPP performance and their operation duration after sunset and to determine the geometric modification effect on the plant energy efficiency.

这项工作研究了太阳能烟囱发电厂 (SCPP) 内自然对流作用下的湍流流体流动。这项研究是通过数值模拟进行的，使用 Saturne 代码与 Syrthes 代码耦合。对烟囱出口进行了几何修改。在塔出口处设置了具有不同出口截面的发散形状。该研究针对两种类型的太阳能烟囱发电厂进行。在第一种配置中，只有收集器下方的土壤被视为存储系统。在第二个中，存储系统由土壤和一个 10 厘米厚的装满水的桶组成，覆盖了收集器的整个表面。边界条件将根据气象数据定义，适用于阿尔及利亚阿德拉尔现场可用的典型日子。