平板型太阳集热器表面积尘对其热性能影响的分析  

ANALYSIS OF THE EFFECT OF DUST ACCUMULATION ON THERMAL PROPERTIES OF FLAT PLATE SOLAR COLLECTORS

作　　者：李念平[1] 马俊[1] 刘刚 李小鹏[1] 

机构地区：[1]湖南大学土木工程学院,长沙410082 [2]深圳市建筑科学研究院有限公司,深圳518049

出　　处：《太阳能学报》2013年第7期1197-1201,共5页Acta Energiae Solaris Sinica

基　　金：国家"十二五"科技支撑计划(2011BAJ03B05-6);长沙市科技攻关项目(K1104010-11)

摘　　要：以两组分别处于模拟积尘与清洁状况下的平板型太阳集热器为研究对象,在相同环境条件下,通过对比其瞬时效率及效率曲线研究不同积尘量对其热性能的影响。研究结果表明:积尘不仅会降低集热器的瞬时效率,同时也会降低其所能达到的最高效率和最高温度;效率下降值与积尘量之间成正比Δηd=0.089lnm-0.118;在干旱少雨的地区或季节应注意保持集热器表面的清洁,特别是在积尘初期;要使集热器在实际运行过程中获得较高的热性能,不仅要从本质上提高其自身的性能,其运行维护同样需要引起重视。Two groups of flat plate solar collectors which were respectively in simulative dusty and clean condition were researched in the same conditions of circumstances, and the effects of various mass of dust on their thermal properties was researched by comparing their instantaneous efficiencies and efficiency curves. The results of experi- ment showed that the dust not only reduced the instantaneous efficiency of the collector, but also lowered the highest efficiency and temperature which it can reached; The value of efficiency declining is in direct proportion to the mass of dust, A~/d --0. 0891nm -0. 118; The surface of collector should be kept cleaning in the arid area or season, especially in the early days of dust accumulation ; If we intend to obtain higher thermal properties in operating course for collector, we should not only improve its performance, but also attach importance to its operational maintenance.

关 键 词：模拟积尘 平板型太阳集热器 瞬时效率 效率曲线 热性能 

分 类 号：TK519[动力工程及工程热物理—热能工程]