内置扰流柱列太阳能集热管的换热分析  

HEAT TRANSFER ANALYSIS OF INTERNALLY PIN-FINNED SOLAR PARABOLIC TROUGH COLLECTOR

作　　者：皮骏 蒲芋树 刘光才[1] 李章萍[1] Pi Jun;Pu Yushu;Liu Guangcai;Li Zhangping(School of General Aviation Engineering,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学通用航空工程学院,天津300300

出　　处：《太阳能学报》2020年第9期227-232,共6页Acta Energiae Solaris Sinica

基　　金：中央高校基本科研业务费项目中国民航大学专项资助(3122017056)。

摘　　要：抛物型槽式太阳能集热管在运行过程中外壁受到非均匀太阳热流的加热,由此诱发的热应变和弯曲变形易导致集热管的失效。该文运用计算机模拟的方法研究内置扰流柱列太阳能集热管的换热性能,模拟结果表明,雷诺数、柱单元截面形状、柱单元高径比对内置扰流柱列集热管的周向截面温差、内壁面努赛尔数有明显影响。扰流柱列可为改善太阳能集热管的换热性能提供可能性。The parabolic trough solar collector tube is heated by non-uniform solar heat flow during its operation,the induce thermal strain and bending deformation are easy to cause its failure.in this paper,the computer simulation method is used to study the heat transfer performance of internally pin-finned parabolic trough solar collector,the numerical results show that Reynolds number,cross section shape and height-to-diameter ratio of pin-fin element have obvious effects on circumferential section temperature difference and absorber tube inner surface Nusselt number of internally pin-finned parabolic trough solar collector.Pin-fin array can provide the possibility to improve the heat transfer performance of the solar collector tube.

关 键 词：太阳能集热器 热流 计算机模拟 扰流柱列 换热性能 

分 类 号：TK519[动力工程及工程热物理—热能工程]