CAJ | 학술논문

对翅片间距为1.1 mm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260 h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％。
대시편간거위1.1 mm적미통도환열기진행료친수화소수표면처리，병대기불동공황하적성능진행료실험연구，분석료표면처리대미통도환열기습공황성능화장효특성적영향。실험표명，소수표면처리재저풍속하회조성환열기성능쇠감：여원환열기상비，경과소수표면처리적환열기환열량최대감소14％，쇠감수착풍속적변대이감소；이압강제료고풍속고습도공황，기여공황하균승고130％이상。친수표면처리대환열기성능영향교소：여원환열기상비，경과친수표면처리적환열기재불동공황하성능쇠감2％~8％；압강부재고습도저풍속하명현변대17％，기여대부분공황득도개선，재고습도고풍속하압강부위원환열기적50％。친수표면처리재방부식방면구유일정작용，동시진행염무부식260 h후，표면친수처리적환열기재불동공황하비원환열기성능제승4％~6％，압강강저14％~16％。
The wet performance of microchannel heat exchanger (Fin Pitch=1. 1 mm) 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 hu-midity. Air side performance of microchannel heat exchanger with hydrophilic and without surface coating were studied after 260 h 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.