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공압시스템 제습용 중공사막 모듈의 제습성능 검증을 위한 유동해석 연구
정은아(E. A. Jeong),이기윤(K. Y. Lee),이양래(Y. L. Lee),강창남(C. N. Kang),윤소남(S. N. Yun) 유공압건설기계학회 2019 유공압건설기계학회 학술대회논문집 Vol.2019 No.6
Dehumidification in the pneumatic system is an important factor for preventing efficiency decrease and malfunction due to humid air. Various dehumidifier has been developed until now and especially dehumidifier using polymer membrane has been studied for low cost and easy manufacture. In this study, experiment and flow analysis of hollow fiber membrane module were performed for confirming the efficiency of dehumidification which is also related to the pneumatic system performance improvement. Water removal ability and adsorption performance of hollow fiber membrane module were confirmed by results of flow analysis and experiment, and the reliability of the flow analysis could be obtained through the comparison with experiment results. From this study, dehumidification phenomena in the hollow fiber membrane module was found out, and the basic design concept for the next generation dehumidification system was also discussed.
유동해석을 이용한 공압시스템 제습용 제습장치의 형상 개선에 관한 연구
정은아(E. A. Jeong),이기윤(K. Y. Lee),이양래(Y. L. Lee),강창남(C. N. Kang),윤소남(S. N. Yun) 유공압건설기계학회 2019 유공압건설기계학회 학술대회논문집 Vol.2019 No.6
In this study, flow analysis and dehumidification experiment of hollow fiber membrane module were performed for determining the dehumidification characteristics of its different configurations. CFD of four different models with 30℃ temperature and 30%RH inlet humidity was conducted for quantitative analysis. Each model has different shape parameters i-e the number of hollow fiber membranes and the existence or absence of baffles. After comparison between flow analysis results and dehumidification experiment results, the percentage error turned out to be around 2%. Moisture removal rate for each model was calculated using flow analysis data. It was found that moisture removal rate of refined model that has three baffles and eight hollow fiber membranes was highest among the modeled four modules of hollow fiber membrane one, i-e around 60%.
박혜민(H. M. Park),함영복(Y. B. Ham),윤소남(S. N. Yun),박중호(J. H. Park),이양래(Y. L. Lee) 유공압건설기계학회 2018 유공압건설기계학회 학술대회논문집 Vol.2018 No.11
The use of a check valve to prevent backflow of fluid causes fatigue and wear of the pump due to factors such as fluid flow, repetitive operation, and the like. To prevent this, research is underway to develop a valveless piezoelectric pump. This paper investigates the technology of valveless piezoelectric pumps using a traveling wave among various kinds of valveless piezoelectric pumps and compares and analyzes operation rinciple, design structure, frequency, the driving voltage and flow characteristics. As a result, it was found that the piezoelectric pump using the ring type piezoelectric element had the largest flow rate among the hollow type, plate type, and ring type piezoelectric elements, and the frequency influenced the flow characteristics rather than the driving voltage. According to the existing studies, the valveless peristaltic piezoelectric pump is limited in the transferable flow rate. Therefore, in this study, we intend to develop a valveless piezoelectric pump capable of circulating more flow by generating a peristaltic motion in a flow tube using a piezoelectric actuator.