立式集热板太阳能热气流电站流场的数值模拟

用Fluent软件对立式集热板太阳能热气流电站流场进行数值模拟,获得立式集热板太阳能热气流电站空气流速、压力场分布。结果表明,流道内部中间速度最大,压力从地面到出口逐渐减少,预测在出口处有较小回流现象。速度与系统功率成正比关系,速度大小对功率影响较大,而集热板高宽比对烟囱内主流速度影响显著,当高度、宽度与入口直径比值为10∶2∶1时,主流速度最大,在其它条件不变的情况下,系统功率最大。

Numerical Simulation of Air Distribution in the Solar Chimney Power Plant System with Vertical Heat Collection Plate

The numerical studies were performed by using Fluent to simulate the distribution of velocity and pressure in the solar chimney power plant system with vertical heat collection plate.The simulation results illustrated that the maximum velocity was in the center of the flow area,the pressure decreased gradually from ground to the export and some air may return in the export.The results also showed that the system power was proportional to the velocity and the influence of velocity on the power was great.Moreover,the ratio of height and width for heat collection plate had a significant effect on the main flow's velocity,and when height-width-diameter of chimney inlet ratio was 10∶2∶1,the velocity would reach the maximum,so did the system power.