烟囱阴影下风力增压式太阳能烟囱电站性能探究  

Study of the performance for wind supercharged solar chimney power plant affected by the chimney shadow

作　　者：左潞[1] 戴鹏展 李闯 丁玲 颜子阳 许波峰[1] Zuo Lu;Dai Pengzhan;Li Chuang;Ding Ling;Yan Ziyang;Xu Bofeng(College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学能源与电气学院,江苏南京211100

出　　处：《可再生能源》2022年第1期55-59,共5页Renewable Energy Resources

基　　金：国家自然科学基金资助项目(51976053);国家级大学生创新创业训练计划(202010294024)。

摘　　要：文章以西班牙太阳能烟囱电站为原型,采用太阳射线追踪法加载太阳辐射,对太阳能烟囱电站和风力增压型太阳能烟囱电站进行三维数值模拟,探讨烟囱阴影下系统的流场特性和太阳入射角度对系统性能的影响。研究结果表明:烟囱阴影区蓄热层表面、集热棚表面温度突降,导致热气流与蓄热层表面、集热棚表面进行对流换热,造成热量损失;随着太阳入射角增加,系统轴功率和集热棚效率均明显下降;风力增压装置形成的出口负压可以削弱阴影所造成的气流掺混等不利影响,因而风力增压型太阳能烟囱电站涡轮机轴功率的变化幅度相对常规太阳能烟囱电站较为平缓。Three-dimension numerical simulations of solar chimney power plant and wind supercharged solar chimney power plant, based on the Spanish prototype, were conducted by using solar ray tracing algorithm. The flow field distribution with the chimney shadow and the effect of sunlight incident angle on the systems performance were studied. The results show that the surface temperature of the heat storage layer and collector would drop suddenly in the shadow area caused by the chimney blocking, causing a reverse convection heat transfer and heat loss. Besides, the turbine shaft power and collector efficiency decrease obviously with the incident angle increasing.The negative pressure at the chimney outlet caused by the wind pressure ventilator would result in a faster airflow, which weakens the negative effect of the airflow mixing caused by the chimney shadow. The decrease speed of the turbine shaft power in wind supercharged solar chimney power plant is relatively little compared with solar chimney power plant as a result.

关 键 词：太阳能烟囱 阴影效应 风力增压 数值模拟 

分 类 号：TK519[动力工程及工程热物理—热能工程]