竖直式太阳能烟囱优化及其通风性能研究  

Optimization and investigation on ventilation performance for a vertical solar chimney

作　　者：顾元[1] 雷勇刚[1] 王飞[1] 

机构地区：[1]太原理工大学环境科学与工程学院,山西太原030024

出　　处：《可再生能源》2015年第12期1797-1802,共6页Renewable Energy Resources

基　　金：国家自然科学基金资助项目(51106103);太原理工大学校团队项目基金(2013T051)

摘　　要：介绍了一种基于风压和热压耦合作用的竖直式太阳能烟囱优化结构,通过三维数值模拟,研究外筒高度h、通道Ⅱ宽度w、室外风速v和太阳辐射强度I对其通风性能的影响。结果表明:在相同工况下,优化结构的太阳能烟囱的通风性能优于传统的竖直式太阳能烟囱;风压和热压对通风量均为增益作用;通风量随外筒高度h的增加而持续增大;当增加通道Ⅱ宽度w时,通风量先增后减再增,在w=50 mm附近通风量达到最大值。A optimized structure of a vertical solar chimney based on the coupling action of wind pressure and thermal pressure was introduced. The effect of the outer cylinder height（h）,channel Ⅱwidth（w）,outdoor wind speed（v） and solar radiation intensity（I） on the the ventilation performance of the new structure were studied by three-dimensional computational fluid dynamics method. The results showed that the ventilation performance of the optimized structure was better than that of the traditional solar chimney at the equal condition.The interaction of wind and thermal pressure could enhance the ventilation of the vertical solar chimney.The mass flow rate increase continuously with the increase of the outer cylinder height（h）.With the increase of the channel Ⅱwidth（w）, the mass flow rate of the solar chimney firstly increases, then decreases and finally increases again. There is an optimum width of channel Ⅱat around 50 mm for the maximum of mass flow rate.

关 键 词：优化 风压 热压 竖直式太阳能烟囱 

分 类 号：TU834.1[建筑科学—供热、供燃气、通风及空调工程]