新型太阳能空气集热器瞬时效率影响因素分析  

Influencing Factors Analysis for Instantaneous Efficiency of New Solar air Collector

作　　者：程友良[1] 王月坤 

机构地区：[1]华北电力大学能源动力与机械工程学院,河北保定071003

出　　处：《热能动力工程》2017年第8期122-129,共8页Journal of Engineering for Thermal Energy and Power

基　　金：中央高校基本科研业务费专项资金项目(2016XS107);全国工程专业学位研究生教育指导委员会教改项目(2016-ZX-079)

摘　　要：选取一种新型抛物线型波纹吸热板太阳能空气集热器作为研究对象,建立其数学模型和物理模型,利用ANSYS(有限元分析)14.0数值模拟软件,模拟空气集热器入口空气温度、吸热板涂层、某天不同时刻、波纹布置方式、空气流动方式以及吸热板波纹幅值对空气集热器换热特性及瞬时效率的影响。结果表明:吸热板入口空气顺流流动的温度越低、横向抛物线型波纹板上使用选择性吸收涂层会使得其吸热板平均温度降低,瞬时效率增大,在入口空气流速2.0 m/s时,使用选择性吸收涂层使得瞬时效率最大达68.5%。另外,空气集热器的瞬时效率随时间的推移先增加后减小,在13时时,效率最大达61.8%;吸热板波纹幅值的增加提高了空气集热器的瞬时效率且增幅逐渐减小,在幅值h=10 mm时,效率最大达75.4%。In the paper,a new solar air collector with parabolic corrugated heat absorption plate is selected as the research object,and its mathematical model and physical model are established. The influences of the inlet air temperature,heat absorbing plate coating,different time of day,corrugation arrangement,air flow mode and corrugated amplitude of heat absorption plate on the heat-transfer characteristics and instantaneous efficiency of air collector were simulated by ANSYS14. 0 software. The results show that both the lower temperature of inlet air,which flows forward on the absorption plate,and the use of the transverse-parabolic corrugated plate with selective absorbing coating will reduce the average temperature of the absorption plate and increase the instantaneous efficiency of the solar air collector. At the inlet air velocity of 2. 0 m/s,using selective absorbing coating makes instantaneous efficiency come to the maximum value of 68. 5%. In addition,the instantaneous efficiency of the air collector increases first and then decreases with time passing by with the maximum efficiency of 61. 8% at 13 o' clock. With the increase in the absorber plate corrugated amplitude,the instantaneous efficiency of air collector increases while the increasing rate de-clines gradually with the maximum efficiency of 75. 4% at the amplitude of h = 10 mm

关 键 词：太阳能空气集热器 瞬时效率 影响因素 数值模拟 抛物线型波纹 吸热板 换热特性 

分 类 号：TK513.3[动力工程及工程热物理—热能工程]