| 摘要: |
| 对翅片间距为1.1mm的微通道换热器进行了亲水和疏水表面处理，并对其不同工况下的性能进行了实验研究，分析了表面处理对微通道换热器湿工况性能和长效特性的影响。实验表明，疏水表面处理在低风速下会造成换热器性能衰减：与原换热器相比，经过疏水表面处理的换热器换热量最大减小14%，衰减随着风速的变大而减小；而压降除了高风速高湿度工况，其余工况下均升高130%以上。亲水表面处理对换热器性能影响较小：与原换热器相比，经过亲水表面处理的换热器在不同工况下性能衰减2%-8%；压降仅在高湿度低风速下明显变大17%，其余大部分工况得到改善，在高湿度高风速下压降仅为原换热器的50%。亲水表面处理在防腐蚀方面具有一定作用，同时进行盐雾腐蚀260h后，表面亲水处理的换热器在不同工况下比原换热器性能提升4%-6%，压降降低14%-16%。 |
| 关键词: 微通道换热器 表面处理 换热性能 压降 盐雾腐蚀 |
| DOI： |
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| 基金项目:十二五科技支撑项目（2012BAF01B06）资助项目。 |
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| Research on the Wet Performance and Long-term Characteristics of Microchannel Heat Exchanger with Surface Coating |
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Liu Luming1, Shi Junye1, Wang Ying1, Ge Fanggen2, Wang Feng2, Wei Qingqi3, Chen Jiangping1
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| (1.School of Mechanical Engineering, Shanghai Jiao Tong University;2.Zhejiang University Dunan Artificial Environment Co.,Ltd.;3.Tianjin Sanden Auto Air-conditioning Co.,Ltd.) |
| Abstract: |
| The wet performance of microchannel heat exchanger (Fin Pitch=1.1mm) with hydrophobic, hydrophilic and without surface coating were studied under different conditions experimentally. The results indicated that hydrophobic surface coating had bad effects on air side performance: the capacity decreased by 14% under low air velocity and the decrease became less with the increase of air velocity; the pressure drop increased at least by 130% under different conditions except the condition of high air velocity & humidity. The capacity of hydrophilic heat exchanger decreased by 2%-8% under different conditions; the pressure drop decreased up to 50% under high air velocity & humidity and got improved under most conditions except for the 17% decrease under the condition of low air velocity & high humidity. Air side performance of microchannel heat exchanger with hydrophilic and without surface coating were studied after 260h salt spray corrosion. The capacity of hydrophilic coating heat exchanger increased by 4%-6% compared to the one without surface coating, and pressure drop decreased by 14%-16%. The result indicated that hydrophilic coating was good for anti-corrosion. |
| Key words: microchannel heat exchanger surface coating heat transfer performance pressure drop salt spray corrosion |
