On the basis of the monitoring test bench of fouling thermal resistance,the changes of typical water qualityparameters in the formation process of heat exchanger microbial fouling,under the effect of electro-magnetic fieldhave been investigated,and the relevance of water quality parameters and fouling thermal resistance discussedthrough grey correlation analysis. The results show that under the effect of electro-magnetic field,the number of bacteria,fouling thermal resistance,and turbidity are lower than that of the contrast group without adding magnetism,but its pH and conductivity are higher than that of the contrast group without adding magnetism. The grey correlationanalysis shows that the water quality parameters and the formation of fouling are closely related,among whichturbidity has the most remarkable influence on fouling thermal resistance.%基于污垢热阻监测实验台,考察了电磁场作用下换热器微生物污垢形成过程典型水质参数的变化,并用灰色关联分析法探讨了水质参数与污垢热阻的关联性.结果表明:在电磁场作用下,细菌数、污垢热阻、浊度较未加磁的对照组低,而pH、电导率较未加磁的对照组高.灰色关联分析显示水质参数与污垢的形成密切相关,其中,浊度对污垢热阻影响最为显著.
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