采用表面喷锌及喷硅扁管的微通道换热器长效特性研究

Study on Long-term Performance of Microchannel Heat Exchanger with Zn-coated and Si-coated Extruded Tube

腐蚀特性是全铝微通道换热器的主要特征之一。对两种不同表面处理方式的挤压扁管:表面喷锌挤压扁管和表面喷硅挤压扁管的长效特性进行了对比研究。对采用这两种不同表面处理方式的挤压扁管的微通道换热器样件,分别进行了7天和14天的盐雾腐蚀实验(SWAAT),对比腐蚀前后两个换热器样品的换热量、空气侧压降和总热阻变化情况。结果表明,采用表面喷硅扁管的微通道换热器的长效特性优于采用表面喷锌扁管。

Corrosion character is one of the main characters of A1 microchannel heat exchanger. In the present study, standard seawater acidified test （7 and 14 days） were carried out on mierochannel heat exchangers with Zn-eoated extruded tube and Si-coated extruded tube, and the performances of the test samples before and after the corrosion were tested in order to compare the change of capacity, air side pressure drop and thermal resistance. The result showed that, the long-term performance of the sample with Si-coated extruded tube was much better than the sample with Zn-eoated extruded tube.