Mathematical Modeling for the Regenerator of Liquid Desiccant Air-Conditioning System

Abstract:

T his paper presents mathematical model for regenerator of liquid desiccant air conditioning system. Regression analysis was used to get the relation between enthalpy and humidity ratio. Performance of regenerator is highly affected by varying the flow direction between air & desiccant thus to get proper regeneration results counter-flow configuration is considered. Previous studies show better regeneration results for counter-flow direction of air to desiccant. Validation is done by comparing results of present study the experimental results of previous studies and comparison was found to be quite satisfactory. Based on above mathematical model performance of regenerator was analyzed. The purpose of this research was regeneration of liquid desiccant from its dilute-solution form to strong-solution.

• Periodical: Applied Mechanics and Materials (Volumes 465-466)
• Pages: 226-231
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.465-466.226
• Online since: December 2013
• Authors: Majid Ali Wassan, Khairul Habib, Suhaimi B. Hassan
• Keywords: Analytical Solution, Liquid Desiccant, Regenerator

References

[1] A. Lowenstein, Review of Liquid Desiccant Technology for HVAC Applications, HVAC&R Research, vol. 14, no. 6, p.819–839, Nov. (2008).

DOI: 10.1080/10789669.2008.10391042

[2] G. Grossman, Solar-powered systemsfor cooling and dehumidification, Solar Energy, vol. 72, no. 1, p.53–62, (2002).

DOI: 10.1016/s0038-092x(01)00090-1

[3] K. Gommed and G. Grossman, A Liquid Desiccant System for Solar Cooling and Dehumidification, Journal of Solar Energy Engineering, vol. 126, no. 3, p.879, (2004).

DOI: 10.1115/1.1690284

[4] C. Ren, M. Tu, and H. Wang, An analytical model for heat and mass transfer processes in internally cooled or heated liquid desiccant–air contact units, International Journal of Heat and Mass Transfer, vol. 50, no. 17–18, p.3545–3555, Aug. (2007).

DOI: 10.1016/j.ijheatmasstransfer.2006.12.034

[5] A. Bakhtiar, F. Rokhman, and K. H. Choi, A novel method to evaluate the performance of liquid desiccant air dehumidifier system, Energy and Buildings, vol. 44, p.39–44, Jan. (2012).

DOI: 10.1016/j.enbuild.2011.10.011

[6] S. Jain and P. Bansal, Performance analysis of liquid desiccant dehumidification systems, International Journal of Refrigeration, vol. 30, no. 5, p.861–872, Aug. (2007).

DOI: 10.1016/j.ijrefrig.2006.11.013

[7] ASHRAE, Handbook of Fundamentals, American Society of Heating, Refrigerating and Air-conditioning Engineers, Atlanta, 2005 (Chap. 22).

[8] L. Mei and Y. J. Dai, A technical review on use of liquid-desiccant dehumidification for air-conditioning application, Renewable and Sustainable Energy Reviews, vol. 12, no. 3, p.662–689, Apr. (2008).

DOI: 10.1016/j.rser.2006.10.006

[9] X. H. Liu, X. M. Chang, J. J. Xia, and Y. Jiang, Performance analysis on the internally cooled dehumidifier using liquid desiccant, Building and Environment, vol. 44, no. 2, p.299–308, Feb. (2009).

DOI: 10.1016/j.buildenv.2008.03.009

[10] X. Y. Chen, Z. Li, Y. Jiang, and K. Y. Qu, Analytical solution of adiabatic heat and mass transfer process in packed-type liquid desiccant equipment and its application, Solar Energy, vol. 80, no. 11, p.1509–1516, Nov. (2006).

DOI: 10.1016/j.solener.2005.12.002

[11] K. Gommed, G. Grossman, and F. Ziegler, Experimental Investigation of a LiCl-Water Open Absorption System for Cooling and Dehumidification, Journal of Solar Energy Engineering, vol. 126, no. 2, p.710, (2004).

DOI: 10.1115/1.1643075