扰流板式太阳墙内部流动传热分析  

Analysis of internal flow and heat transfer in spoiler solar wall

作　　者：张大鹏 刘芳[1] 贾斌广 Zhang Dapeng;Liu Fang;Jia Binguang(School of Thermal Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东建筑大学热能工程学院,山东济南250101

出　　处：《可再生能源》2018年第10期1455-1461,共7页Renewable Energy Resources

基　　金：国家自然科学基金项目(51406105)

摘　　要：为了减少太阳墙的换热损失,提高其集热效率,文章提出了一种扰流板式太阳墙,并对普通太阳墙和扰流板式太阳墙进行数值模拟。研究结果表明:典型工况下,扰流板式太阳墙的平均集热效率和平均出风温度分别比普通太阳墙高30.03%,10.1℃;当太阳辐射强度由200 W/m^2逐渐升高至800 W/m^2时,两种太阳墙的出风温度、集热效率和热损失系数均呈现出逐渐增加的变化趋势,但总体来讲,太阳辐射强度对集热效率影响较小,对出风温度和热损失系数影响较大;当送风量发生变化时,若保证室内的最低送风温度为30℃,则扰流板式太阳墙的集热效率比普通太阳墙高32.59%,扰流板式太阳墙的热损失系数比普通太阳墙低0.94 W/(m^2·℃)。In order to reduce the heat loss of solar wall and improve the solar wall heat collection efficiency, the paper proposes a spoiler solar wall and numerical simulation of the common solar wall and the spoiler solar wall. The results were show, when under typical conditions, the average collector efficiency of the spoiler solar wall is 30.03% higher than that of the ordinary solar wall,and the average outlet air temperature is increased by 10.1 ℃. When the solar radiation intensity is gradually increased from 200 W/m^2 to 800 W/m^2, the outlet temperature, heat collection efficiency and heat loss coefficient of the two solar walls show a gradual increase trend, but overall, the solar radiation intensity has little effect on the heat collection efficiency, and the oulet temperature and heat loss coefficient has a great influence. When the air supply volume changes, if the minimum air supply temperature in the room is 30 ℃, the heat collecting efficiency of the spoiler solar wall is 32.59% higher than that of the common solar wal, and the heat collection efficiency of spoiler solar is 0.94 W/（m^2·℃） lower than that of a common solar wall.

关 键 词：太阳墙 扰流板 集热效率 热损失系数 

分 类 号：TK513.3[动力工程及工程热物理—热能工程]