Physical properties measurement and performance analysis of membranes for a multi-stage planar membrane dehumidifier
In this work, the experimental measurement is conducted to examine different membranes to find a suitable option for a planar membrane dehumidifier. The physical properties with critical characteristics of air permeance and water vapor permeance are used as the indexes to evaluate the better membran...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2019-11-01
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| Series: | Case Studies in Thermal Engineering |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X19303302 |
| _version_ | 1819052026447790080 |
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| author | Chun-Han Li Chih-Chang Chang Wen-Ken Li Wei-Mon Yan |
| author_facet | Chun-Han Li Chih-Chang Chang Wen-Ken Li Wei-Mon Yan |
| author_sort | Chun-Han Li |
| collection | DOAJ |
| description | In this work, the experimental measurement is conducted to examine different membranes to find a suitable option for a planar membrane dehumidifier. The physical properties with critical characteristics of air permeance and water vapor permeance are used as the indexes to evaluate the better membrane applicability for planar dehumidifiers. The experiments contain three parts. Firstly, the air permeance rates of a variety of membranes are measured. Experimental data reveal that Nafion membranes have lower air permeance rate compared with RO membrane under the same degree of vacuum pressure. Secondly, measurements of water vapor permeance of RO and Nafion membranes are carried out. Results show that water vapor permeance of Nafion is better than RO. Finally, Nafion membranes are tested to explore the influence at various temperature, relative humidity and the vacuum side pressure on condensed water and water vapor permeance. The measurement results indicate that increasing temperature enhances the condensed water at either low or high relative humidity, while increasing the pressure on the vacuum side gets less water permeated. As a result, Nafion membranes have characteristics of low air permeance and high water vapor permeance to be candidates of the suitable membrane applied in a planar membrane dehumidifier. Keywords: Multi-stage planar membrane dehumidifier, Reverse osmosis, Nafion membranes, Air permeance, Water vapor permeance |
| first_indexed | 2024-12-21T12:13:17Z |
| format | Article |
| id | doaj.art-aa763f05c2294a839fb7fe332b44436e |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-12-21T12:13:17Z |
| publishDate | 2019-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-aa763f05c2294a839fb7fe332b44436e2022-12-21T19:04:30ZengElsevierCase Studies in Thermal Engineering2214-157X2019-11-0115Physical properties measurement and performance analysis of membranes for a multi-stage planar membrane dehumidifierChun-Han Li0Chih-Chang Chang1Wen-Ken Li2Wei-Mon Yan3Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei, 10608, Taiwan; Research Center of Energy Conservation for New Generation of Residential, Commercial, and Industrial Sectors, National Taipei University of Technology, Taipei, 10608, TaiwanDivision of Energy, Refrigeration & Air-Conditioning Engineering, Department of Industrial Technology Education, National Kaohsiung Normal University, Kaohsiung, 82444, TaiwanDepartment of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei, 10608, Taiwan; Research Center of Energy Conservation for New Generation of Residential, Commercial, and Industrial Sectors, National Taipei University of Technology, Taipei, 10608, Taiwan; Corresponding author. Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei, 10608, Taiwan.Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei, 10608, Taiwan; Research Center of Energy Conservation for New Generation of Residential, Commercial, and Industrial Sectors, National Taipei University of Technology, Taipei, 10608, Taiwan; Corresponding author. Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei, 10608, Taiwan.In this work, the experimental measurement is conducted to examine different membranes to find a suitable option for a planar membrane dehumidifier. The physical properties with critical characteristics of air permeance and water vapor permeance are used as the indexes to evaluate the better membrane applicability for planar dehumidifiers. The experiments contain three parts. Firstly, the air permeance rates of a variety of membranes are measured. Experimental data reveal that Nafion membranes have lower air permeance rate compared with RO membrane under the same degree of vacuum pressure. Secondly, measurements of water vapor permeance of RO and Nafion membranes are carried out. Results show that water vapor permeance of Nafion is better than RO. Finally, Nafion membranes are tested to explore the influence at various temperature, relative humidity and the vacuum side pressure on condensed water and water vapor permeance. The measurement results indicate that increasing temperature enhances the condensed water at either low or high relative humidity, while increasing the pressure on the vacuum side gets less water permeated. As a result, Nafion membranes have characteristics of low air permeance and high water vapor permeance to be candidates of the suitable membrane applied in a planar membrane dehumidifier. Keywords: Multi-stage planar membrane dehumidifier, Reverse osmosis, Nafion membranes, Air permeance, Water vapor permeancehttp://www.sciencedirect.com/science/article/pii/S2214157X19303302 |
| spellingShingle | Chun-Han Li Chih-Chang Chang Wen-Ken Li Wei-Mon Yan Physical properties measurement and performance analysis of membranes for a multi-stage planar membrane dehumidifier Case Studies in Thermal Engineering |
| title | Physical properties measurement and performance analysis of membranes for a multi-stage planar membrane dehumidifier |
| title_full | Physical properties measurement and performance analysis of membranes for a multi-stage planar membrane dehumidifier |
| title_fullStr | Physical properties measurement and performance analysis of membranes for a multi-stage planar membrane dehumidifier |
| title_full_unstemmed | Physical properties measurement and performance analysis of membranes for a multi-stage planar membrane dehumidifier |
| title_short | Physical properties measurement and performance analysis of membranes for a multi-stage planar membrane dehumidifier |
| title_sort | physical properties measurement and performance analysis of membranes for a multi stage planar membrane dehumidifier |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X19303302 |
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