Hollow Fiber Membrane Dehumidification Device for Air Conditioning System
In order to provide a comfortable living and working environment indoors in tropical countries, the outdoor air often needs to be cooled and dehumidified before it enters the rooms. Membrane separation is an emerging technology for air dehumidification and it is based on the solution diffusion mecha...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2015-11-01
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| Series: | Membranes |
| Subjects: | |
| Online Access: | http://www.mdpi.com/2077-0375/5/4/722 |
| _version_ | 1811153908894007296 |
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| author | Baiwang Zhao Na Peng Canzeng Liang Wai Fen Yong Tai-Shung Chung |
| author_facet | Baiwang Zhao Na Peng Canzeng Liang Wai Fen Yong Tai-Shung Chung |
| author_sort | Baiwang Zhao |
| collection | DOAJ |
| description | In order to provide a comfortable living and working environment indoors in tropical countries, the outdoor air often needs to be cooled and dehumidified before it enters the rooms. Membrane separation is an emerging technology for air dehumidification and it is based on the solution diffusion mechanism. Water molecules are preferentially permeating through the membranes due to its smaller kinetic diameter and higher condensability than the other gases. Compared to other dehumidification technologies such as direct cooling or desiccation, there is no phase transition involved in membrane dehumidification, neither the contact between the fresh air stream and the desiccants. Hence, membrane dehumidification would not only require less energy consumption but also avoid cross-contamination problems. A pilot scale air dehumidification system is built in this study which comprises nine pieces of one-inch PAN/PDMS hollow fiber membrane modules. A 150 h long-term test shows that the membrane modules has good water vapor transport properties by using a low vacuum force of only 0.78 bar absolute pressure at the lumen side. The water vapor concentration of the feed humid air decreases dramatically from a range of 18–22 g/m3 to a range of 13.5–18.3 g/m3. Most importantly, the total energy saving is up to 26.2% compared with the conventional air conditioning process. |
| first_indexed | 2024-03-12T07:11:58Z |
| format | Article |
| id | doaj.art-2ed7425df92944b0b9ec18c6b4516830 |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-12T07:11:58Z |
| publishDate | 2015-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-2ed7425df92944b0b9ec18c6b45168302023-09-02T23:00:35ZengMDPI AGMembranes2077-03752015-11-015472273810.3390/membranes5040722membranes5040722Hollow Fiber Membrane Dehumidification Device for Air Conditioning SystemBaiwang Zhao0Na Peng1Canzeng Liang2Wai Fen Yong3Tai-Shung Chung4Department of Chemical & Biomolecular Engineering, National University of Singapore, Singapore 117585, SingaporeDepartment of Chemical & Biomolecular Engineering, National University of Singapore, Singapore 117585, SingaporeDepartment of Chemical & Biomolecular Engineering, National University of Singapore, Singapore 117585, SingaporeDepartment of Chemical & Biomolecular Engineering, National University of Singapore, Singapore 117585, SingaporeDepartment of Chemical & Biomolecular Engineering, National University of Singapore, Singapore 117585, SingaporeIn order to provide a comfortable living and working environment indoors in tropical countries, the outdoor air often needs to be cooled and dehumidified before it enters the rooms. Membrane separation is an emerging technology for air dehumidification and it is based on the solution diffusion mechanism. Water molecules are preferentially permeating through the membranes due to its smaller kinetic diameter and higher condensability than the other gases. Compared to other dehumidification technologies such as direct cooling or desiccation, there is no phase transition involved in membrane dehumidification, neither the contact between the fresh air stream and the desiccants. Hence, membrane dehumidification would not only require less energy consumption but also avoid cross-contamination problems. A pilot scale air dehumidification system is built in this study which comprises nine pieces of one-inch PAN/PDMS hollow fiber membrane modules. A 150 h long-term test shows that the membrane modules has good water vapor transport properties by using a low vacuum force of only 0.78 bar absolute pressure at the lumen side. The water vapor concentration of the feed humid air decreases dramatically from a range of 18–22 g/m3 to a range of 13.5–18.3 g/m3. Most importantly, the total energy saving is up to 26.2% compared with the conventional air conditioning process.http://www.mdpi.com/2077-0375/5/4/722hollow fibermodule fabricationPDMS coatingmembrane dehumidificationenergy saving |
| spellingShingle | Baiwang Zhao Na Peng Canzeng Liang Wai Fen Yong Tai-Shung Chung Hollow Fiber Membrane Dehumidification Device for Air Conditioning System Membranes hollow fiber module fabrication PDMS coating membrane dehumidification energy saving |
| title | Hollow Fiber Membrane Dehumidification Device for Air Conditioning System |
| title_full | Hollow Fiber Membrane Dehumidification Device for Air Conditioning System |
| title_fullStr | Hollow Fiber Membrane Dehumidification Device for Air Conditioning System |
| title_full_unstemmed | Hollow Fiber Membrane Dehumidification Device for Air Conditioning System |
| title_short | Hollow Fiber Membrane Dehumidification Device for Air Conditioning System |
| title_sort | hollow fiber membrane dehumidification device for air conditioning system |
| topic | hollow fiber module fabrication PDMS coating membrane dehumidification energy saving |
| url | http://www.mdpi.com/2077-0375/5/4/722 |
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