中空纤维膜基蒸发水冷器的多目标优化  

Optimization of hollow fiber membrane-based evaporative water cooler

作　　者：闫伟超 崔鑫 杨传钧 马靖 刘亦琳 孟祥兆[1] 金立文[1] Yan Weichao;Cui Xin;Yang Chuanjun;Ma Jing;Liu Yilin;Meng Xiangzhao;Jin Liwen(School of Human Settlements and Civil Engineering,Xi'an Jiaotong University;Tsinghua Shenzhen International Graduate School;China Architecture Design&Research Group)

机构地区：[1]西安交通大学人居环境与建筑工程学院 [2]清华大学深圳国际研究生院 [3]中国建筑设计研究院有限公司

出　　处：《制冷与空调》2024年第10期64-70,共7页Refrigeration and Air-Conditioning

基　　金：国家自然科学基金(52106025)。

摘　　要：提出一种中空纤维膜基蒸发水冷器,以解决传统水侧蒸发冷却系统的空气-水交叉污染和液滴飘逸等问题,并对逆流式中空纤维膜基蒸发水冷器的关键设计参数进行优化研究。在开式冷却塔的标准工况下,通过数值模拟和响应面法获得2个回归模型,建立水流速、气水比、纤维长度、纤维内径、膜层厚度和填充率6个设计参数与出口水温和耗电比2个性能评价指标之间的关联性。通过方差分析验证模型的可靠性,即R2超过0.98,信噪比高于45.92。采用遗传算法同时最小化2个评价指标,得到一组最佳参数组合,构成帕累托前沿。此外,通过理想点法确定相对最优解,结果表明:优化方案能够使中空纤维膜基蒸发水冷器的出口水温和耗电比分别达到29.44℃和0.0128kW·h/m^(3),相比原始设计分别降低10.23%和94.52%。最后通过对帕累托前沿的验证所提出的优化方案在工程实践中的可靠性。A hollow fiber membrane-based evaporative water cooler is proposed to solve the problems such as air-water cross-contamination and droplet entrainment in traditional water-side evaporative cooling systems.The optimizing study on key design parameters of the counterflow hollow fiber membrane-based evaporative water cooler is conduc-ted.Under standard working conditions of open cooling towers,two regression models are developed through numerical simulation and response surface method.These correlations between six design parameters(water flow rate,air-water ratio,fiber length,fiber inner diameter,membrane thickness,and packing fraction)and two performance evaluation indicators(outlet water temperature and power consumption ratio)are established.The reliability of the models are verified by variance analysis,with R~2 exceeding 0.98 and a signal-to-noise ratio higher than 45.92.Genetic algorithm is employed to simultaneously minimize the two evaluation indicators,resulting in optimal parameter combinations which forms the Pareto front.Additionally,the relative optimal solution is determined using the ideal point method.The results show that the optimization scheme achieves an outlet water temperature of 29.44℃and power consumption ratio of 0.0128 kW·h/m^(3),respectively,representing a reduction of 10.23%and 94.52%compared to the original design.The validation of the Pareto front confirms the reliability of the proposed optimization scheme in engineering practice.

关 键 词：蒸发冷却 中空纤维膜 开式冷却塔 响应面法 遗传算法 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]