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

太阳能烟囱(a)（又称太阳上升气流塔）是一种发电系统，它通过捕捉太阳热量引起的上升气流来旋转风力涡轮机。通过将原来的高层圆柱型塔替换为扩散型塔，期望获得更高的功率输出。增加辅助结构来引导外部风进入塔可能会进一步增加输出。在本研究中，使用一个实验室大小的模型，不考虑风力机，来分析风力机设计位置的上升气流风速。室内实验和计算流体力学分析表明，当热对流占主导地位时，流场的强度为1。扩压塔的作用使速度增大4倍。此外，当外风主导流场时，1。通过扩压塔与辅助结构的协同作用，将9倍大的风速收敛到塔内，引导风进入塔内。风力发电的输出与进入风力机的气流速度的立方成正比；所以大约是2。7到6。使用本研究中所研究的结构设计，可以估计出8倍大的功率输出。

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.