太阳能烟囱强化自然通风实验研究  

EXPERIMENTAL STUDY ON SOLAR CHIMNEY FOR NATURAL VENTILATION

作　　者：李安桂[1] 郝彩侠[2] 张海平[2] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055 [2]河北建筑工程学院城市建设系,张家口075024

出　　处：《太阳能学报》2009年第4期460-464,共5页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(No.50278075);教育部高等学校博士点基金(教技发中心函[2004]196号)

摘　　要：实验探讨了高2000mm,长1000mm的竖直集热板屋顶式太阳能烟囱模型,在改变宽度及热流密度的情况下,研究其诱导的空气量及内部空间气流温度场和速度场的变化。结果表明,在研究范围内自然通风量随烟囱宽度、热流密度的增加而增大,气流速度随热流密度的增加而增大,随烟囱宽度的增加而降低。气流温度及速度在烟囱热壁近壁面处高于其在远离壁面处,在热壁近壁处形成了温度和速度边界层。The experiment was carried out using a vertical roof solar chimney model of 2000mm high, 1000mm long. The variations of natural ventilation, interior temperature field and velocity field were studied by changing the chimney gap and heat flux. The results show that the natural ventilation increased with the increase of the chimney gap and heat flux, the interior air velocity increased with the increase of solar radiant intensity, but decreases with the increase of the chimney gap. Air temperature and velocity are higher near the heated surfaces than other interior places. The temperature and velocity boundary layers form near the heated surfaces.

关 键 词：太阳能烟囱 自然通风 边界层 

分 类 号：TK519[动力工程及工程热物理—热能工程]