摘要
为了简化潜热交换量的计算方法,引入了体现传热与传湿之间联系的Lewis关系,并将常温下水蒸气汽化潜热和水蒸气分压力用温度的线性函数表示,经简化处理,得出了湿润壁面潜热交换系数与显热交换系数间及潜热交换量与显热交换量间的比例关系;利用此比例关系,将潜热交换量表示成了显热交换系数与温度的函数,大大简化了计算过程;根据此潜热交换量计算式,分析了湿润壁面潜热与显热交换的方向,得出湿润壁面总热交换量应为显热与潜热交换量的代数和的结论。
To simplify the calculating method for the latent heat exchange quantity,the Lewis regulation reflecting the relation between the heat transfer and the moisture transfer was cited and the evaporated latent heat and partial pressure of vapor under normal atmospheric temperature were approximately expressed with the linear function of temperature,which,then,was rationally simplified,obtaining the ratio relationships between the sensible and the latent heat exchange coefficients and that between the sensible and the latent heat exchange quantities.With the ratio relationships,the calculating expression of the latent heat exchange quantity was expressed as the function of the temperature and the sensible heat exchange coefficient,which can help to greatly simplify the computation.The directions of the sensible and latent heat exchanges were analyzed by using the simplified expression.It concludes that the total heat exchange quantity from the wet walls is the algebraic sum of the sensible and the latent heat exchange quantities.
出处
《山东科技大学学报（自然科学版）》
CAS
2010年第2期57-62,共6页
Journal of Shandong University of Science and Technology(Natural Science)
基金
"十一五"国家科技支撑计划项目(2006BAK04B03)
关键词
巷道
湿润壁面
对流换热
潜热比系数
roadway
wet walls of roadway
heat exchange of convection
latent heat ratio
