空调用金属填料表面传热传质过程的数值分析

建立了填料塔的二维传热传质模型，考虑了因水蒸发或凝结而引起的水的质量变化和空气的质量变化.利用实验数据回归得到的传热系数和传质系数.用差分法求得了更接近实际的数值解.实验研究证明使用这个改进的方法，使得模型的数值解与实验结果吻合得较好.数值分析结果描述了金属填料内部空气的湿球温度场和填料表面水膜的温度场，有助于研究金属填料表面传热传质性能，为金属填料用于空调机组中的设计提供了计算方法，可以给出满足工程精度要求的设计依据.

Numerical analysis of heat and mass transfer process on metal fill surface for air conditioning

A planar model of air and water flow on metal fill surface was set up to investigate heat and mass transfer performance of air conditioner.Experiment was done and two equations about coefficients of heat transfer and mass transfer were developed by using the multiple linear regression method to process experimental data. Mathematical equations were set up by considering water and air mass changes during their flow through metal fill due to evaporation and condensation.Computational results agreed with experimental data well. By visualization of the field of key variables on metal fill surface, another way to know heat and mass transfer performance was given.By this means, engineers can design metal fill for air conditioning application more accurately according to given factors such as water temperature, air mass flow rate, water mass flow rate, etc.