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Proceedings of an International Conference on Mitigation of Heat Exchanger Fouling and Its Economic and Environmental Implications

ISSN:
1-56700-172-6 (Print)

SAM HEAT TRANSFER SURFACE FOULING BEHAVIOR AND FOULING FRACTAL CHARACTERISTICS

Qingfeng Yang
Institute of Refrigeration and Cryogenics Shanghai Jiaotong University Shanghai, 200030, P.R. China

Jie Ding
Institute of Chemical Engineering Dalian University of Technology Dalian 116012, P.R. China

Zi-Qiu Shen
Institute of Chemical Engineering Research Dalian University of Science and Engineering, Dalian, China 116012

Abstract

CaC03 crystallization fouling experiments were carried out in a simulated cooling water system on the copper surface and the copper modified low energy surface−SAM (self-assembled monolayer) surface. The results suggest that the fouling process is enhanced in the presence of desorbed air bubbles on the modified surface. Fractal theory is used to analyze the fouling geometric texture. The results demonstrate that the fractal dimension value D of CaC03 fouling on the SAM surface is higher than that on the copper surface.