L型翅片式太阳能平板双效集热器集热性能数值模拟研究  

Numerical Simulation of Heat Transfer Performance on Dual-Function Solar Collectors with L-shaped Fins on the Absorber Plate

作　　者：刘爽 马进伟[1,2] 方廷勇 寇雪[1] 童维维 LIU Shuang;MA Jinwei;FANG Tingyong;KOU Xue;TONG Weiwei(Anhui Jianzhu University,Hefei 230601,Anhui,China;Chinaland solar energy Co.,ltd.,Hefei 231600 Anhui,China)

机构地区：[1]安徽建筑大学,安徽合肥230601 [2]合肥中南光电有限公司,安徽合肥231600

出　　处：《建筑科学》2019年第10期79-83,共5页Building Science

基　　金：“十三五”国家重点研发计划项目“近零能耗建筑技术体系及关键技术开发”(2017YFC0702600);国家自然科学基金项目“太阳能空气/水复合集热受迫对流传热机理及光热转换性能研究”(51606002)

摘　　要：为提高太阳能双效集热器的集热效率,本文对传统平板式太阳能双效集热器和L型翅片式集热器进行数值模拟,对比分析空气集热模式和空气-水复合集热模式的传热特性,并研究空气和水的流量以及翅片高度对L型翅片式双效集热器瞬时集热效率的影响。结果表明:当空气质量流量为0.016kg/s,水质量流量为0.018 kg/s时,L型翅片式双效集热器集热效率比传统平板式集热效率提高了9%;集热器中水瞬时集热效率和空气的瞬时集热效率存在相互制约的关系,但随着空气质量流量或者水质量流量的增加,集热器瞬时效率均有所提高;增加翅片高度可以有效的提高集热器的集热效率。In order to improve the thermal efficiency of flat panel solar collectors,this paper compares the traditional flat-panel solar collectors and which with L-shaped fins by numerical simulation,and analyzes the heat transfer performance in air heater mode and air-water dual mode.Influences of air and water mass flow rates on the thermal efficiency are also studied in this paper.The results show that when the air mass flow rate is 0.016 kg/s and the water mass flow rate is 0.018 kg/s,the thermal efficiency of L-shaped solar collector is 9%,which is higher than that of traditional collectors;the instantaneous thermal efficiencies of water and air are mutually restricted,but with the increase of air mass flow rate or water mass flow rate,the instantaneous thermal efficiency increases;Increasing the fin height can obviously improve the collector efficiency of the collector.

关 键 词：太阳能集热器 双效 L型翅片 数值模拟 瞬时效率 

分 类 号：TK2[动力工程及工程热物理—动力机械及工程]