双斜向内肋对强化立式太阳能热气流电站的流动传热特性研究

发布时间：2018-04-09 23:18

本文选题：立式集热板太阳能热气流发电系统　切入点：场协同原理　出处：《太阳能学报》2016年08期

【摘要】：为了加强立式太阳能热气流电站系统的传热,将矩形双斜向内肋对成对地布置在竖直烟囱通道的集热板上。通过数值计算,空气在流经肋对时温度梯度增大,换热增强。与原系统相比,加入双斜向内肋对后,气流的进出口温差增加21%,进出口速度差提高133%。进一步对双斜向内肋对的布置,包括肋对数和肋倾角进行研究,得到适合于本系统的内肋对的最佳设置为肋对数为2对、肋倾角为45°,此布置下气流的进出口温差增加8%,进出口速度差提高200%。利用场协同原理对结果进行分析验证,证明双斜向内肋对可以有效地减小速度矢量与温度梯度的夹角,增强系统换热。
[Abstract]:In order to enhance the heat transfer of the vertical solar thermal flow power station, the rectangular double oblique inner ribs are arranged on the collector plate of the vertical chimney passage in pairs.By numerical calculation, the temperature gradient of air increases and the heat transfer increases as it flows through the rib pair.Compared with the original system, the inlet and outlet temperature difference of the airflow increases by 21 and the velocity difference between the inlet and outlet increases by 133when the double oblique internal rib pair is added.The arrangement of double oblique internal rib pairs, including rib logarithm and rib inclination angle, is further studied. The optimum arrangement of internal rib pairs suitable for this system is that the lognorm of ribs is 2 pairs.The rib inclination angle is 45 掳. Under this arrangement, the inlet and outlet temperature difference increases by 8 and the inlet and outlet velocity difference increases by 200.It is proved that the angle between velocity vector and temperature gradient can be reduced effectively and the heat transfer of the system can be enhanced by the analysis and verification of the results by using the field synergy principle.
【作者单位】：青岛科技大学机电工程学院;
【基金】：国家自然科学基金(51176080) 山东省自然科学基金(ZR2012EEL17)
【分类号】：TK124;TM615

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