Wind Generation and Wind Convergence Performance Evaluation of a New Solar Tower(VT-WCONVS)

点击翻译按钮获取中文摘要

The Solar Chimney(a. k. a. the Solar Updraft Tower) is a power generation system which rotates the wind turbine from capturing the updraft wind induced from solar heat. A higher power output is expected by replacing the original high rise cylindrical-type tower into a diffuser-type tower. Addition of assistive structures to guide the external wind into the tower may further increase the output. In this research, a laboratory sized models without the wind turbine, are used to analyze the updraft wind velocity at the designed location of the wind turbine. The laboratory experiments and the computational fluid dynamics analyses show that, when the thermal convection dominates the flow field, 1. 4 times larger velocity is induced by the effect of the diffuser-type tower. Furthermore, when the external wind dominates the flow field, 1. 9 times larger velocity is converged by the synergetic effect of the diffuser-type tower along with the assistive structures to guide the wind into the tower. Wind power generation output is proportional to the cube of the incoming flow velocity into a wind turbine ; therefore approximately 2. 7 to 6. 8 times larger power output can be estimated by the usage of the structural design investigated in this research.