太阳能热气流发电烟囱的合理形体研究  

Reasonable form research of solar thermal power chimney

作　　者：吕晓东[1] 袁行飞[1] 

机构地区：[1]浙江大学空间结构研究中心,浙江杭州310058

出　　处：《空间结构》2010年第3期79-85,共7页Spatial Structures

基　　金：国家自然科学基金资助项目(50708092)

摘　　要：首先总结了影响太阳能热气流发电站功率和效率的各种因素,然后运用计算流体力学方法研究了烟囱高度、烟囱直径、烟囱形状、集热棚直径和集热棚离地高度的变化对系统性能的影响.研究结果表明:增大烟囱高度或集热棚直径都会提升系统的性能;随着烟囱直径的增大,系统性能表现出先提升再下降的规律;渐扩型烟囱使系统效率最优;集热棚离地高度对系统性能影响较小.兼顾系统效率和结构安全,对一100MW电站发电烟囱的形体和几何进行了初步设计.Various influence factors on power and efficiency of the solar thermal power station was summarized first.Taking the wind velocity and the differential pressure as evaluation index,effect of chimney＇s height,chimney＇s diameter,chimney＇s shape,collector＇s diameter and collector＇s height from ground on the system efficiency was then studied by using computational fluid dynamic method.The numerical results show that increasing chimney＇s height or collector＇s diameter can improve the efficiency of system.With the increasing diameter of the chimney,the efficiency of system will raise first and then drop down.The chimney with asymptotic expansion form enables the optimal efficiency of the system.The collector＇s height from ground has little influence on the system performance.Considering the efficiency of system and the safety of the structure,the reasonable form and geometry size was designed for the 100MW power station.

关 键 词：太阳能 烟囱 数值模拟 合理形体 系统效率 

分 类 号：TU312.1[建筑科学—结构工程] V211.3[航空宇航科学与技术—航空宇航推进理论与工程]