Forward Osmosis(FO) membrane intrinsic parameter impact analysis through PCA and experimental study on existing modeling in terms of velocity
- 주제(키워드) forward osmosis
- 발행기관 고려대학교 대학원
- 지도교수 양대륙
- 발행년도 2021
- 학위수여년월 2021. 8
- 학위구분 석사
- 학과 대학원 화공생명공학과
- 원문페이지 66 p
- UCI I804:11009-000000252126
- DOI 10.23186/korea.000000252126.11009.0001227
- 본문언어 영어
초록/요약
Forward osmosis (FO) is an osmotic-driven membrane technology. This thesis approached FO from two perspectives: (i) the effect of the operating condition on the membrane instrinsic parameter, (ii) Sherwood analogy, which was previously used for flux prediction in terms of velocity, and reviewed through experiments . To analyze the influence of operating conditions, operating variables such as flow direction, velocity, membrane orientation, temperature and osmotic pressure were selected and PCA analysis was performed using about 700 experimental data. As a result of PCA, the influence of the variable was found through the new variable PC including 95% of the original data. It was also confirmed that velocity is as important as temperature and osmotic pressure. This velocity is an important factor in determining ECP when the mass transfer coefficient is obtained through Sherwood analogy. However, it was found that the widely used Sherwood analogy was different from the experimental observation at low velocity.
more목차
1. INTRODUCTION 1
2. Analysis of the influence of FO membrane intrinsic parameters through Principal component analysis (PCA) 7
2.1 FO experimental data collection 7
2.2 Selection of the main variables and target variable 9
2.3 Principal component analysis (PCA) 13
3. Experimental study on existing modeling in terms of velocity 16
3.1 Previous theoretical models and problems of mass transfer coefficient with Sherwood analogy 16
3.2 Materials 20
3.2.1 Membrane 20
3.2.2 Membrane characterization 21
3.3 Experiments 24
3.3.1 Bench-scale forward osmosis experiments 24
3.3.2 FO experiment with zero velocity 27
4. Results and Discussions 30
4.1 Analysis of FO experimental data from previous research 30
4.2 Explained variance ratio 34
4.3 Loading coefficient 36
4.4 Quantitative analysis of the effect of operating conditions on the FO performances 42
4.5 Experimental result by cross-flow velocity 45
5.Conclusions 50
6. REFERENCES 51
