Mobile QR Code QR CODE : Korean Journal of Air-Conditioning and Refrigeration Engineering
Korean Journal of Air-Conditioning and Refrigeration Engineering

Korean Journal of Air-Conditioning and Refrigeration Engineering

ISO Journal TitleKorean J. Air-Cond. Refrig. Eng.
  • Open Access, Monthly
Open Access Monthly
  • ISSN : 1229-6422 (Print)
  • ISSN : 2465-7611 (Online)
Title An Experimental Study on the LiCl Dehumidification Performance of a Cross-Flow- Type Liquid Desiccant Dehumidifying Element Having Parallel Channels
Authors Nae-Hyun Kim
Page pp.347-357
ISSN 1229-6422
Keywords 제습 ; 제습소자 ; 평행채널 ; 액체제습제 ; 염화리튬 Dehumidification ; Dehumidifying element ; Parallel challel ; Liquid desiccant ; LiCl
Abstract Compared to the solid-desiccant system using rotors, the liquid-desiccant system has many advantages. including low regeneration temperature and removal of VOC, bacteria, and particulate matter. One deficiency of the liquid system, however, is the carryover of liquid desiccant into the system. In this study, a parallel-channel type of dehumidifying element made of cellulose/PET was developed; it minimized the liquid carryover even at relatively high velocities. Dehumidification tests were conducted using LiCl to change the frontal velocity from 2.0 to 4.0 m/s, and the results were compared with those obtained from commercial Celdek. Virtually no carryover was observed for the new sample up to 4.0 m/s, whereas the carryover was observed above 3.0 m/s for Celdek. The amount of dehumidification increased as frontal velocity increased. At 2.0 m/s, the amounts of dehumidification between the new sample and Celdek were approximately equal. At 4.0 m/s, however, Celdek yielded 16% more dehumidification. Celdek also yielded 41 to 48 percent larger pressure drops. Comparison of data from both the new sample and the Celdek with theoretical predictions or those from correlations showed significant disagreement, apparently because of the poor wetting of the liquid over sample surfaces, or deficiency of the correlations that resulted from ignoring the existence of liquid film.