Nu and Sh correlations for LiCl solution and moist air in plate type dehumidifier

Jae Hyun Lee, Chung Woo Jung, Young Soo Chang, Jin Taek Chung, Yong Tae Kang

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

To cope with environmental pollution caused by rapid industrial development, international regulations such as the Montreal Protocol and the United Nations Framework Convention on Climate Change are becoming materialized day by day. As a result, interest in energy saving devices is increasing and studies are being concentrated on highly efficient refrigeration air conditioning systems. In this study, a desiccant cooling technology using a liquid desiccant of LiCl solution was researched. The plate was treated with hydrophilic coating and the wettability was improved by giving a groove shape. Consequently, a thin liquid film was maintained even with a small amount of desiccant solution, thereby increasing the stability of the liquid film and solving the scattering problem of the desiccant solution. In this study, it is found that the absorption rate increases with the increases of the liquid desiccant and air velocity and the air velocity has more significant effect on the absorption rate than the liquid desiccant solution flow. It is found that the absorption rate becomes higher with increasing the higher relative humidity and the concentration of liquid desiccant. The dehumidification effectiveness decreases greatly as the air velocity increases. Furthermore, it is concluded that the air velocity has the greatest effect on the improvement of the absorption rate and heat and mass transfer. In this experiment, Sh and Nu correlations of the air side and desiccant solution side with an error of ±25% were developed, respectively, and the absorption rate, dehumidification effectiveness and the experimental correlations were compared with other studies.

Original languageEnglish
Pages (from-to)433-444
Number of pages12
JournalInternational Journal of Heat and Mass Transfer
Volume100
DOIs
Publication statusPublished - 2016 Sep 1

Fingerprint

Hygroscopic Agents
desiccants
air
Air
Liquid films
Liquids
liquids
dehumidification
Refrigeration
Climate change
Air conditioning
United Nations
Wetting
Atmospheric humidity
Energy conservation
Pollution
Mass transfer
air conditioning
Scattering
Heat transfer

Keywords

  • Dehumidification effectiveness
  • Liquid desiccant
  • Lithium chloride
  • Plate type dehumidifier

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics
  • Fluid Flow and Transfer Processes

Cite this

Nu and Sh correlations for LiCl solution and moist air in plate type dehumidifier. / Lee, Jae Hyun; Jung, Chung Woo; Chang, Young Soo; Chung, Jin Taek; Kang, Yong Tae.

In: International Journal of Heat and Mass Transfer, Vol. 100, 01.09.2016, p. 433-444.

Research output: Contribution to journalArticle

@article{6a8f7d262ff34e9d8b91af9a8ca80cb8,
title = "Nu and Sh correlations for LiCl solution and moist air in plate type dehumidifier",
abstract = "To cope with environmental pollution caused by rapid industrial development, international regulations such as the Montreal Protocol and the United Nations Framework Convention on Climate Change are becoming materialized day by day. As a result, interest in energy saving devices is increasing and studies are being concentrated on highly efficient refrigeration air conditioning systems. In this study, a desiccant cooling technology using a liquid desiccant of LiCl solution was researched. The plate was treated with hydrophilic coating and the wettability was improved by giving a groove shape. Consequently, a thin liquid film was maintained even with a small amount of desiccant solution, thereby increasing the stability of the liquid film and solving the scattering problem of the desiccant solution. In this study, it is found that the absorption rate increases with the increases of the liquid desiccant and air velocity and the air velocity has more significant effect on the absorption rate than the liquid desiccant solution flow. It is found that the absorption rate becomes higher with increasing the higher relative humidity and the concentration of liquid desiccant. The dehumidification effectiveness decreases greatly as the air velocity increases. Furthermore, it is concluded that the air velocity has the greatest effect on the improvement of the absorption rate and heat and mass transfer. In this experiment, Sh and Nu correlations of the air side and desiccant solution side with an error of ±25{\%} were developed, respectively, and the absorption rate, dehumidification effectiveness and the experimental correlations were compared with other studies.",
keywords = "Dehumidification effectiveness, Liquid desiccant, Lithium chloride, Plate type dehumidifier",
author = "Lee, {Jae Hyun} and Jung, {Chung Woo} and Chang, {Young Soo} and Chung, {Jin Taek} and Kang, {Yong Tae}",
year = "2016",
month = "9",
day = "1",
doi = "10.1016/j.ijheatmasstransfer.2016.04.100",
language = "English",
volume = "100",
pages = "433--444",
journal = "International Journal of Heat and Mass Transfer",
issn = "0017-9310",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Nu and Sh correlations for LiCl solution and moist air in plate type dehumidifier

AU - Lee, Jae Hyun

AU - Jung, Chung Woo

AU - Chang, Young Soo

AU - Chung, Jin Taek

AU - Kang, Yong Tae

PY - 2016/9/1

Y1 - 2016/9/1

N2 - To cope with environmental pollution caused by rapid industrial development, international regulations such as the Montreal Protocol and the United Nations Framework Convention on Climate Change are becoming materialized day by day. As a result, interest in energy saving devices is increasing and studies are being concentrated on highly efficient refrigeration air conditioning systems. In this study, a desiccant cooling technology using a liquid desiccant of LiCl solution was researched. The plate was treated with hydrophilic coating and the wettability was improved by giving a groove shape. Consequently, a thin liquid film was maintained even with a small amount of desiccant solution, thereby increasing the stability of the liquid film and solving the scattering problem of the desiccant solution. In this study, it is found that the absorption rate increases with the increases of the liquid desiccant and air velocity and the air velocity has more significant effect on the absorption rate than the liquid desiccant solution flow. It is found that the absorption rate becomes higher with increasing the higher relative humidity and the concentration of liquid desiccant. The dehumidification effectiveness decreases greatly as the air velocity increases. Furthermore, it is concluded that the air velocity has the greatest effect on the improvement of the absorption rate and heat and mass transfer. In this experiment, Sh and Nu correlations of the air side and desiccant solution side with an error of ±25% were developed, respectively, and the absorption rate, dehumidification effectiveness and the experimental correlations were compared with other studies.

AB - To cope with environmental pollution caused by rapid industrial development, international regulations such as the Montreal Protocol and the United Nations Framework Convention on Climate Change are becoming materialized day by day. As a result, interest in energy saving devices is increasing and studies are being concentrated on highly efficient refrigeration air conditioning systems. In this study, a desiccant cooling technology using a liquid desiccant of LiCl solution was researched. The plate was treated with hydrophilic coating and the wettability was improved by giving a groove shape. Consequently, a thin liquid film was maintained even with a small amount of desiccant solution, thereby increasing the stability of the liquid film and solving the scattering problem of the desiccant solution. In this study, it is found that the absorption rate increases with the increases of the liquid desiccant and air velocity and the air velocity has more significant effect on the absorption rate than the liquid desiccant solution flow. It is found that the absorption rate becomes higher with increasing the higher relative humidity and the concentration of liquid desiccant. The dehumidification effectiveness decreases greatly as the air velocity increases. Furthermore, it is concluded that the air velocity has the greatest effect on the improvement of the absorption rate and heat and mass transfer. In this experiment, Sh and Nu correlations of the air side and desiccant solution side with an error of ±25% were developed, respectively, and the absorption rate, dehumidification effectiveness and the experimental correlations were compared with other studies.

KW - Dehumidification effectiveness

KW - Liquid desiccant

KW - Lithium chloride

KW - Plate type dehumidifier

UR - http://www.scopus.com/inward/record.url?scp=84966351238&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84966351238&partnerID=8YFLogxK

U2 - 10.1016/j.ijheatmasstransfer.2016.04.100

DO - 10.1016/j.ijheatmasstransfer.2016.04.100

M3 - Article

AN - SCOPUS:84966351238

VL - 100

SP - 433

EP - 444

JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

SN - 0017-9310

ER -