Imperial College London
Alternate

ProfessorChristosMarkides

Faculty of Engineering, Department of Chemical Engineering

Professor of Clean Energy Technologies
 
 
 
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Contact

 

+44 (0)20 7594 1601c.markides Website

 
 
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Location

 

404ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Fang:2021:10.1016/j.enconman.2021.114869,
author = {Fang, S and Xu, Z and Zhang, H and Rong, Y and Zhou, X and Zhi, X and Wang, K and Markides, CN and Qiu, L},
doi = {10.1016/j.enconman.2021.114869},
journal = {Energy Conversion and Management},
pages = {1--14},
title = {High-performance multi-stage internally-cooled liquid desiccant dehumidifier for high gas-liquid flow ratios},
url = {http://dx.doi.org/10.1016/j.enconman.2021.114869},
volume = {250},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Liquid desiccant dehumidification provides a pathway to high-flow air pretreatment of air compressors for en-ergy savings. However, high air-to-solution flow ratios (i.e., over 4.0) may result in an unacceptable decrease in dehumidification effectiveness, and few studies have managed to overcome this challenge. This study aims to experimentally demonstrate that  the  multi-stage internally-cooled liquid desiccant dehumidifier (MILDD) is capable of improving the effectiveness at extremely high air-to-solution flow ratios over 10.0. A laboratory bench of the MILDD is designed and tested in various operational conditions. Based on the finite difference model, the experimental results of dehumidification effectiveness are analyzed in terms of the heat and mass transfer process such as irreversible loss and driving forces. The specific cooling capacity associated with the energy efficiency is further studied by considering different desiccant regeneration efficiency. In addition, the experimental latent effectiveness from present and previous work is compared and correlated. Results show that the measured latent effectiveness of the MILDD exceeds 0.42 and goes even up to 1.02 at high  air-to-solution flow ratios, i.e., 8.6–20.1, while existing liquid desiccant dehumidifiers maintain a comparable effectiveness only at much lower flow ratios, i.e., below 4.0. The proposed model and correlation also have been validated with a considerable accuracy for  predicting the  performance of  internally-cooled dehumidifiers. This  work has  experimentally demonstrated the ability of the multi-stage internally-cooled liquid desiccant dehumidifier to overcome the low effectiveness at high gas–liquid flow ratios, which advances the potential application of liquid desiccant dehu-midification in the air compression process.
AU  - Fang,S
AU  - Xu,Z
AU  - Zhang,H
AU  - Rong,Y
AU  - Zhou,X
AU  - Zhi,X
AU  - Wang,K
AU  - Markides,CN
AU  - Qiu,L
DO  - 10.1016/j.enconman.2021.114869
EP  - 14
PY  - 2021///
SN  - 0196-8904
SP  - 1
TI  - High-performance multi-stage internally-cooled liquid desiccant dehumidifier for high gas-liquid flow ratios
T2  - Energy Conversion and Management
UR  - http://dx.doi.org/10.1016/j.enconman.2021.114869
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000712659400005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://www.sciencedirect.com/science/article/pii/S0196890421010451?via%3Dihub
UR  - http://hdl.handle.net/10044/1/92697
VL  - 250
ER  -
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