The Optimized Design of the Chimney Channel in the Solar Chimney Power Plant System with Vertical Heat Collector

In this paper, the temperature distribution, velocity distribution and pressure distribution in the initial designed chimney of the solar chimney power plant system with vertical heat collector were simulated by the FLUENT software, and according to the simulating results, the chimney structure was optimized. The convergent channel was designed to replace the linear channel, and streamline corner which was consistent with the fluid flow line was used instead of the right-angle corner. The optimized results simulated by FLUENT show that the air temperature at the chimney outlet increases about 8K, the velocity increases about 30%, and the reflux is overcome. At the same time, the heat collector with longitudinal fins was designed to replace the flat plate collector. By the simulation, the collector efficiency significantly improves, the air temperature at the chimney outlet improves about 11K and the air temperature difference between inside and outside layer decreases about 7K.