平板降膜除湿场协同性分析

Field Synergy Analysis of Film Falling Desiccant

溶液除湿方式在节能领域有广阔的发展前景,对溶液除湿涉及的传热传质耦合过程进行研究可以完善相关理论知识。本文采用Fluent数值模拟方法,在渗透理论模型的基础上,从场协同的角度,利用协同角评价标准分析了不同工况下平板降膜溶液除湿过程。对不同入口速度、入口温度、入口浓度、入口含湿量进行了数值模拟。研究结果表明:选定工况范围内,浓度场和速度场的协同性随着入口溶液温度、入口空气流速的升高而减弱,随着入口空气含湿量、入口溶液浓度的增加而增强。该数值模拟为溶液除湿研究提供了新的研究角度。方差法分析得到各因素对协同性影响程度由大到小排序为溶液温度、溶液浓度、气流速度、空气含湿量。

The liquid desiccant method has broad development prospects in the field of energy conservation,and the research on the heat and mass transfer coupling process involved in liquid desiccant will improve the relevant theoretical knowledge. In this paper,Fluent numerical simulation method was applied to analyze the film falling desiccant process under different working conditions on the basis of penetration theory model from the perspective of field synergy with the field synergy angle evaluation standard. Numerical simulation was conducted under different inlet velocities,inlet temperature,inlet concentration and inlet moisture content. The research results indicated that,within the selected working conditions,the synergy of the concentration field and velocity field was weakened with the increase of the inlet liquid temperature and inlet air velocity,but strengthened with the increase of the inlet air moisture content and inlet liquid concentration. The numerical simulation provided a new perspective for the study of liquid desiccant. And the variance analysis came to the result that the influence of each factor on the synergetic effect was ranked in descending order as liquid temperature,liquid concentration,airflow velocity and air moisture content.