陶瓷窑炉余热回收的高效热管换热器数值研究

Numerical Study of the Efficient Heat Pipe Heat Exchanger for the Application of Ceramic Kiln Flue Gas Heat Recovery

高效热管换热器可应用于陶瓷窑炉的烟气余热回收利用。建立了热管换热器传热过程的物理数学模型并进行了数值求解,得到了空气稳态流动的温度场、压力场和速度场。研究表明热管的前半部分和后半部分均产生了气体的回流现象,温度从从进口到出口逐渐升高;热管换热器的换热量随空气入口速度的增加而增加,阻力系数随着雷诺数的增加而减小。

Efficient heat pipe heat exchanger has application in the flue gas heat recovery. A mathematical model is developed for the heat transfer processes of heat pipe heat exchanger and solved numerically with the steady temperature field, pressure field and velocity field obtained. The results have shown that the frontal and rear half of the heat pipe give rise to the reversed flow and the gas temperature rise gradually from the inlet to outlet; the heat transfer capacity of the heat pipe heat exchanger increases with the increase of the inlet velocity, the coefficient of resistance decreases with the increase of the Reynolds number.