倾斜式太阳能烟囱强化自然通风理论研究

摘要

Solar energy increases the air temperature inside solar chimney.As a result of the difference in air density between the inside and outside of the chimney,natural ventilation can be induced.A mathematical model of inclined solar chimney was proposed based on conservation of mass and energy in order to predict the air flow rate inside the chimney.The relative error be-tween the calculation results and the datareported in literature is compared.The influence of length,width,depth and tilt angle on the airflow rate was discussed.The air flow rate of inclined solar chimney with an inclination angle of 50°used in Urumqi was cal-culated and is 11.52% higher than that of vertical solar chimney at otherwise identical conditions and is a potential natural venti-lation method.%倾斜式太阳能烟囱利用太阳辐射增加烟囱内空气温度，烟囱内外空气温差形成的密度差提供了自然通风所需的驱动力。根据质量守恒和能量守恒方程给出倾斜式太阳能烟囱通风量计算方法，并将计算结果与文献试验测试值进行了对比，分析了烟囱长度、宽度、深度及倾角对通风量的影响，计算了倾斜式太阳能烟囱用于乌鲁木齐地区的通风量，并与竖直式烟囱进行对比，计算结果表明，相同结构尺寸下增加50°倾角可使通风量增加11．52％，是一种值得进一步研究的自然通风方式。