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  

STUDY OF DOUBLE DIAGONAL INNER RIBS ENHANCING FLOW AND HEAT TRANSFER PERFORMANCE IN VERTICAL SOLAR CHIMNEY POWER PLANT

作　　者：宫园园[1] 王莉[1] 路海滨[1] 周艳[1] 李庆领[1] 

机构地区：[1]青岛科技大学机电工程学院,青岛266061

出　　处：《太阳能学报》2016年第8期2012-2018,共7页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51176080);山东省自然科学基金(ZR2012EEL17)

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。In order to enhance diagonal inner ribs were in pairs the heat transfer in vertical solar chimney power plant system, the rectangular double arranged on the heat collection plate with the vertical chimney channel. The numerical calculation shows that the temperature gradient increases and heat transfer enhances as the air flows through the rib pairs. Compared with the original system, the air temperature difference and the speed difference between inlet and outlet increase 21% and 133%, respectively after adding the double diagonal inner rib pairs. Then the arrangement of the diagonal inner ribs, such as number of rib pairs and the tilt angle of ribs are studied, the best setup of inner rib pairs in system is 2 inner rib pairs and the tilt angle of ribs of 45°. Under this arrangement, the air temperature difference between inlet and outlet increases by 8%, and the speed difference between the inlet and the outlet increases by 200%. The field synergy principle is used to analyze and verify the results above, and prove that the double diagonal inner rib pairs effectively reduce the angle between the velocity vector and temperature gradient, and enhance the heat transfer of the system.

关 键 词：立式集热板太阳能热气流发电系统 场协同原理 数值计算 双斜向内肋对 

分 类 号：TK124[动力工程及工程热物理—工程热物理]