基于正交试验的毛细管末端换热性能优化研究

Heat Transfer Performance Optimization of Capillary Terminal Equipment with Orthogonal Test

设计了以换热效能和单位面积换热量为目标函数的正交试验,对毛细管送风末端设备结构参数(管壁厚度、排数、管径外径等)进行了优化.针对换热效能最优结构组合的毛细管送风末端设备,通过水/空气换热的理论计算对毛细管的水流速度进行优化,并确定最佳水流速度为0.20 m/s.结果显示,在冬季工况最佳水流速度的情况下,结构最优组合较最劣组合的换热量增加了97.6%,为毛细管送风末端设备的设计与运行控制提供了一定的理论参考.

Taking heat transfer efficiency and heat transfer per unit area as objective function,the orthogonal test is designed to optimize the structure parameters of capillary air supply terminal equipment,including tube wall thickness,row number,outside diameter of tube,etc.For capillary air supply terminal equipment with optimal structural combination of heat transfer efficiency,the flow velocity of the capillary is optimized by theoretical calculation of water/air heat transfer,and 0.20 m/s is confirmed as the best flow velocity number.The heat transfer performance of the best combination is higher than that of the worst combination is concluded on the basis of the flow velocity,and the results show that the heat transfer of the optimal combination increases by 97.6 % compared with the worst combination in winter,which provides a theoretical reference for the design and operation control of capillary air supply terminal equipment.