双风道太阳墙内流动传热数值模拟分析  

Numerical simulation analysis of fluid flow and heat transfer in double-duct solar wall

作　　者：贾斌广 刘芳[1] 张大鹏 Jia Binguang;Liu Fang;Zhang Dapeng(School of Thermal Energy 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8期1137-1143,共7页Renewable Energy Resources

基　　金：中国工程院咨询项目(2012-ZD-16)

摘　　要：太阳墙的供暖效果与自身的太阳能利用效率紧密相关。为了提升太阳墙的太阳能利用效率,文章提出一种双风道太阳墙。利用CFD软件对不同风量下单、双风道太阳墙内空气的换热特性进行数值模拟,并给出了当太阳辐照度为311 W/m^2时,双风道进、出口温度差与太阳能利用效率的关系曲线。研究结果表明:随着风量的增加,太阳墙的太阳能利用效率逐渐升高,集热板温度逐渐降低,空气与集热板之间的对流换热系数逐渐升高;与单风道太阳墙相比,双风道太阳墙的瞬时集热效率显著升高,最高可达14.12%。The efficiency of solar energy utilization was closely related to the heating effect of the solar wall. In order to improve the utilization rate of solar wall, a kind of solar wall with double air duct was proposed in this paper. CFD software was used to simulate the heat transfer characteristics of the air in solar wall under different air volume conditions in traditional single-duct solar wall and double-duct solar wall. Then, the curve graphs which used to represent the relationship between the temperature difference of inlet and outlet and the efficiency is given when the irradiance was 311 W/m2. The results showed that with the increase of air volume, the utilization efficiency of solar wall increased, the temperature of collector plate decreases, and the convective heat transfer coefficient of air and collector plate increased. Compared with traditional single-duct solar wall, double-duct solar wall enhanced the instantaneous heat collection efficiency significantly up to 14.12%.

关 键 词：太阳墙 CFD 双风道 集热效率 

分 类 号：TK513.3[动力工程及工程热物理—热能工程]