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Sustainability 2016, 8(12), 1264; doi:10.3390/su8121264

Simplified Heat and Mass Transfer Model for Cross-Flow and Countercurrent Flow Packed Bed Tower Dehumidifiers with a Liquid Desiccant System

Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
Multiflow Technology, Taichung 414, Taiwan
Author to whom correspondence should be addressed.
Academic Editor: Alessandro Franco
Received: 29 August 2016 / Revised: 15 November 2016 / Accepted: 21 November 2016 / Published: 3 December 2016
(This article belongs to the Section Energy Sustainability)
View Full-Text   |   Download PDF [3040 KB, uploaded 3 December 2016]   |  


A mathematical model is developed using the Matlab/Simulink platform to investigate heat and mass transfer performance of cross-flow and counterflow dehumidifiers with Lithium Chloride (LiCl) solution. In the liquid desiccant dehumidifier, the orthogonal polynomial basis is used to simulate the combined processes of heat and mass transfer. The temperature profiles on cross-flow and countercurrent flow dehumidifiers are demonstrated. The resultant counter flow air changes the temperature profile of the LiCl solution in the longitudinal direction because of the drag forces. In addition, when inlet airflow rate reaches 15 kg·s−1, the temperature effect becomes less obvious and may be reasonably negligible. Under these conditions, the air changes the design factor and determines the interfacial temperature. It is demonstrated that the mathematical model can be of great value in the design and improvement of cross-flow and countercurrent flow dehumidifiers. View Full-Text
Keywords: cross-flow; countercurrent flow; dehumidifiers; liquid desiccant system cross-flow; countercurrent flow; dehumidifiers; liquid desiccant system

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Hu, S.-C.; Shiue, A.; Chiu, Y.-S.; Wang, A.; Chen, J. Simplified Heat and Mass Transfer Model for Cross-Flow and Countercurrent Flow Packed Bed Tower Dehumidifiers with a Liquid Desiccant System. Sustainability 2016, 8, 1264.

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