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Zolboo Myagmarsukh,Yu-Bin Kim,Young-Deuk Kim 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12
In this study, we proposed a novel non-contact membrane distillation (NCMD) process that can prevent membrane fouling by preventing contact between the feed and the membrane, and experimentally evaluated its performance under the various operating conditions. An ultrasonic transducer was adopted in the feed channel of the module to create a high-frequency mechanical oscillation in a film of feed, forming an extremely fine mist of droplets. To maximize the performance of the ultrasonic-assisted NCMD process, we first conducted experiments to determine the optimum feed height in the feed channel. The effects of feed temperature, feed flow rate and ultrasonic power on the mean permeate flux of the NCMD process were identified at an inlet permeate flow rate of 1.0 L/min and an inlet permeate temperature of 20°C. The mean permeate flux of the ultrasonic-assisted NCMD process was improved by approximately 11 times compared to the conventional NCMD process; here, its mean permeate flux was found to be 4.5 L/㎡h under the given operating conditions, demonstrating its feasibility and operability for desalination applications.