纳米溶液用于间接蒸发冷却器亲水改性的实验研究  

Experimental Study on Hydrophilic Modification of Indirect Evaporative Cooler with Nano Solution

作　　者：徐绍芳 朱祥辉 王翌初 陈奕 XU Shaofang;ZHU Xianghui;WANG Yichu;CHEN Yi(School of Marine Equipment and Mechanical Engineering,Jimei University,Xiamen 361021,Fujian,China)

机构地区：[1]集美大学海洋装备与机械工程学院,福建厦门361021

出　　处：《建筑节能（中英文）》2024年第6期143-148,共6页Building Energy Efficiency

基　　金：福建省自然科学基金资助项目(2021J05165);集美大学引进高层次人才科研启动基金资助项目(ZQ2021013);集美大学大学生创新项目(2022xj401)。

摘　　要：针对目前高分子间接蒸发冷却器湿通道壁面润湿率较差从而引起换热效果不佳的问题,提出一种纳米镀膜聚丙烯(PP)间接蒸发冷却器,旨在改善其亲水性能,从而强化其传热传质过程。实验重点研究了纳米镀膜PP板的亲水性和耐久性,并探寻其布水效果。结果表明:镀膜后的PP板显示出优良的亲水性,水的静态接触角可减小到10°以下,同时该膜层具有较好的耐水性能,在经过长期水刷冲下,表面接触角稳定在30°左右。此外,在实验条件下,纳米镀膜芯体在1 min左右可达到80%以上的润湿率;实验中还发现,镀膜PP板会在表面形成多孔结构并具有保水性,可实现间接蒸发冷却器的间歇布水,在湿球效率保持稳定的情况下,其性能系数比传统的连续布水提高了54%。In order to solve the unsatisfactory heat and mass transfer in polymer indirect evaporative coolers(IEC) resulting from poor wetting in the wet channels,a nano-coated polypropylene(PP) IEC is proposed,aiming at improving the hydrophilicity.The experiment focused on the hydrophilicity and durability of the nano-coated PP plate,and explored the effect of its water distribution.The results show that the coated PP plate shows good hydrophilicity,and the static contact angle of water can be reduced to less than 10°.Meanwhile,the coating has a good water resistance ability,and the contact angle is stabilized at about 30° after long-term testing by water souring.In addition,under experimental conditions,the nano-coating core can reach above 80% wetting rate in about 1 min.It is also found that the coated PP surface forms a porous structure with water absorption ability,which facilitates the realization of intermittent water spraying in IECs.Under the condition that the wet bulb efficiency remains stable,the coefficient of performance is 54% higher than that of traditional continuous water distribution.

关 键 词：间接蒸发冷却器 纳米溶液 亲水性 接触角 润湿率 间歇布水 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程] TB657.5[一般工业技术—制冷工程]