Hollow fiber membrane dehumidification device for air conditioning system

Baiwang Zhao, Na Peng, Canzeng Liang, Wai Fen Yong, Tai-Shung Chung*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)722-738
Number of pages17
JournalMembranes
Volume5
Issue number4
DOIs
StatePublished - Nov 16 2015

Keywords

  • Energy saving
  • Hollow fiber
  • Membrane dehumidification
  • Module fabrication
  • PDMS coating

ASJC Scopus subject areas

  • Materials Science(all)

Fingerprint

Dive into the research topics of 'Hollow fiber membrane dehumidification device for air conditioning system'. Together they form a unique fingerprint.

Cite this