Abstract

Sloped solar chimney power plant (SSCPP) is a solar energy technology to generate solar electrical energy. Compared to the conventional solar chimney power plant (SCPP), this system has a sloped collector that operates as a chimney. This study using computational fluid dynamics (CFD) is provided a 3 D numerical simulation of the SSCPP along with a heat storage layer. The effects of pressure drop during turbine operation and solar irradiances on system parameters and the distribution of velocity and temperature are investigated. Based on results on the no-load condition, the maximum velocity of the system can be reached around 17 m/s at solar irradiance of 1000 W/m². On the load condition, the airflow temperature increased while the velocity decreased, compared to the no-load condition. Furthermore, the power output of the SSCPP was 50 kW when the turbine pressure drop and solar irradiances were 120 Pa and 1000 W/m², respectively. Also, it indicated that at a specific solar irradiance, there is an optimum pressure drop across the turbine. According to found results, the sloped solar chimney power plant is competitive with a conventional SCPP and has the same functionality under the same conditions.

摘要

倾斜太阳能烟囱发电厂（SSCPP）是一种利用太阳能技术产生太阳能电能的技术。与传统的太阳能烟囱发电厂 (SCPP) 相比，该系统有一个倾斜的收集器，可以作为烟囱运行。这项使用计算流体动力学 (CFD) 的研究提供了 SSCPP 以及蓄热层的 3D 数值模拟。研究了涡轮运行期间的压降和太阳辐照度对系统参数以及速度和温度分布的影响。根据空载条件下的结果，在 1000 W/m ^{2的太阳辐照度下，系统的最大速度可以达到 17 m/s 左右}. 在负载条件下，与空载条件相比，气流温度升高而速度降低。^{此外，当涡轮压降和太阳辐照度分别为 120 Pa 和 1000 W/m 2}时，SSCPP 的功率输出为 50 kW 。此外，它还表明，在特定的太阳辐照度下，涡轮机上存在最佳压降。根据发现的结果，倾斜的太阳能烟囱发电厂与传统的 SCPP 具有竞争力，并且在相同条件下具有相同的功能。