Computational studies on the effect of geometric parameters on the performance of a solar chimney power plant
Computational studies on the effect of geometric parameters on the performance of a solar chimney power plant
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DOI：
10.1016/j.enconman.2013.09.056
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发表时间：
2014
影响因子：
10.4
通讯作者：
Sandeep K. Patel;D. Prasad;M. Rafiuddin Ahmed
中科院分区：
文献类型：
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作者：
Sandeep K. Patel;D. Prasad;M. Rafiuddin Ahmed
太阳能烟囱发电厂（SCPP）是一种将太阳能转化为电能的可再生能源发电厂。SCPP由三个基本元件组成-太阳能空气收集器、烟囱塔和风力涡轮机。本工作的目的是使用计算流体动力学（CFD）软件ANSYS-CFX的SCPP的主要部件的几何形状进行优化，研究和改善SCPP内的流动特性。SCPP的总烟囱高度和收集器直径分别保持恒定在10 m和8 m。收集器入口开口从0.05 m变化到0.2 m。收集器出口直径也从0.6 m变化到1 m。这些改进的收集器与不同发散角（0°-3°）的烟囱以及0.6 m至1 m的不同烟囱入口开口一起进行了测试。烟囱的直径也从0.25米到0.3米不等。根据CFX计算结果，得出了最佳的烟囱结构形式，即发散角为2°，烟囱直径为0.25 m，集热器开口为0.05 m，集热器出口直径为1 m。收集器内部的温度对于较低的开口较高，从而导致较高的流速和功率。
A solar chimney power plant (SCPP) is a renewable-energy power plant that transforms solar energy into electricity. The SCPP consists of three essential elements – solar air collector, chimney tower, and wind turbine(s). The present work is aimed at optimizing the geometry of the major components of the SCPP using a computational fluid dynamics (CFD) software ANSYS-CFX to study and improve the flow characteristics inside the SCPP. The overall chimney height and the collector diameter of the SCPP were kept constant at 10 m and 8 m respectively. The collector inlet opening was varied from 0.05 m to 0.2 m. The collector outlet diameter was also varied from 0.6 m to 1 m. These modified collectors were tested with chimneys of different divergence angles (0°–3°) and also different chimney inlet openings of 0.6 m to 1 m. The diameter of the chimney was also varied from 0.25 m to 0.3 m. Based on the CFX computational results, the best configuration was achieved using the chimney with a divergence angle of 2° and chimney diameter of 0.25 m together with the collector opening of 0.05 m and collector outlet diameter of 1 m. The temperature inside the collector is higher for the lower opening resulting in a higher flow rate and power.