摘要
在Navier-Stokes方程的基础上,提出一种新的氨水降膜吸收传热模型,通过对降膜过程中的液膜流动特性进行了一维变换,采用Grank-Nicholson方法对降膜特性进行求解,然后根据实验验证了理论模型的仿真结果,实验数据和仿真数据的误差在17%以内,并根据实验数据拟合出了传热系数公式,确定了不同管径下液膜的最大体积流量。
A new heat and mass transfer model was presented on the basis of Navier-Stokes equation. One-dimensional transformation was conducted on the function of liquid film flow in the process of falling-film, and the Grank-Nicholson Method was used to solve falling-film characteristics. The simulation result of theoretical model was validated with the experiment, and its error is within 17%. Heat and mass transfer coefficient formula was fitted based on the experimental data, and the biggest flow volume of liquid film was obtained in different diameters.
出处
《制冷学报》
CAS
CSCD
北大核心
2013年第1期73-80,共8页
Journal of Refrigeration
基金
国家科技计划项目(2009GJG00015)资助
陕西省教育厅(09JS046)项目资助~~
关键词
降膜吸收
传热模型
水平光管
数值解
falling-film absorption
heat and mass transfer
horizontal bare tube
numerical simulation
