定面积集热棚倾角对集热效率影响的数值模拟研究

The numerical simulation study of the influence to collection efficiency with different angle on fixed area hot tent collection

文章应用计算流体力学方法对呼和浩特地区太阳能烟囱在固定集热棚面积下不同集热棚倾角的棚内空气流动情况进行了数值模拟。由模拟结果可知:在集热棚倾角为0~70°时,空气温度、压力、速度以及集热棚效率曲线有明显变化;在集热棚面积固定条件下,随着集热棚倾角的变化集热棚效率存在较为理想的值,并在达到峰值后持续降低。

By the method of computational fluid mechanics, we make a numerical simulation in order to explore the condition of air flow with the constant collection hot tent area of solar energy chimney in Hohhot. The slope angle is between 0-70°. The temperature, pressure, speed of air and heating efficiency curve is obviously changed. In addition, the condition of collection hot tent area is fixed. As the change of slope angle, there is an reasonable value which is continuously decreased when it reach the maximum efficiency.