EXPERIMENTAL INVESTIGATION ON THE ANTI-FOULING AND HEAT TRANSFER PERFORMANCE OF THE COATED SURFACES

摘要

The main purpose of this investigation was to study the anti-fouling and heat transfer performance of coated surfaces (ECTFE, FEP, PTFE and PFA). In the present investigation, the heat transfer performance of the coated surfaces was compared to base metal surfaces, and crystallization fouling experiments of coated surfaces were carried out under various operating parameters such as solution temperature, solution concentration and hydrodynamics of the system. The characteristic parameters of the coated surface, such as surface roughness, surface contour, contact angle and surface energy were measured and calculated, which were used to analyze the anti-fouling performances of the coated surface. The results show that compared with the base metal surface, Nusselt number of coated surfaces decrease. But coated surfaces have advantage on anti-fouling ability.